![Anton Blanchard](/assets/img/avatar_default.png)
Now we relocate prom_init.c on 64bit we can finally remove the nasty RELOC() macro. Finally a patch that I can claim has a net positive effect on the kernel. It doesn't happen very often. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
3096 lines
81 KiB
C
3096 lines
81 KiB
C
/*
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* Procedures for interfacing to Open Firmware.
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*
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* Paul Mackerras August 1996.
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
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* {engebret|bergner}@us.ibm.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG_PROM
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#include <stdarg.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/threads.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/proc_fs.h>
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#include <linux/stringify.h>
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#include <linux/delay.h>
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#include <linux/initrd.h>
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#include <linux/bitops.h>
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#include <asm/prom.h>
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#include <asm/rtas.h>
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#include <asm/page.h>
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#include <asm/processor.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/mmu.h>
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#include <asm/pgtable.h>
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#include <asm/pci.h>
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#include <asm/iommu.h>
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#include <asm/btext.h>
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#include <asm/sections.h>
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#include <asm/machdep.h>
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#include <asm/opal.h>
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#include <linux/linux_logo.h>
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/*
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* Eventually bump that one up
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*/
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#define DEVTREE_CHUNK_SIZE 0x100000
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/*
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* This is the size of the local memory reserve map that gets copied
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* into the boot params passed to the kernel. That size is totally
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* flexible as the kernel just reads the list until it encounters an
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* entry with size 0, so it can be changed without breaking binary
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* compatibility
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*/
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#define MEM_RESERVE_MAP_SIZE 8
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/*
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* prom_init() is called very early on, before the kernel text
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* and data have been mapped to KERNELBASE. At this point the code
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* is running at whatever address it has been loaded at.
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* On ppc32 we compile with -mrelocatable, which means that references
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* to extern and static variables get relocated automatically.
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* ppc64 objects are always relocatable, we just need to relocate the
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* TOC.
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*
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* Because OF may have mapped I/O devices into the area starting at
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* KERNELBASE, particularly on CHRP machines, we can't safely call
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* OF once the kernel has been mapped to KERNELBASE. Therefore all
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* OF calls must be done within prom_init().
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*
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* ADDR is used in calls to call_prom. The 4th and following
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* arguments to call_prom should be 32-bit values.
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* On ppc64, 64 bit values are truncated to 32 bits (and
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* fortunately don't get interpreted as two arguments).
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*/
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#define ADDR(x) (u32)(unsigned long)(x)
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#ifdef CONFIG_PPC64
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#define OF_WORKAROUNDS 0
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#else
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#define OF_WORKAROUNDS of_workarounds
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int of_workarounds;
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#endif
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#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
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#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
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#define PROM_BUG() do { \
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prom_printf("kernel BUG at %s line 0x%x!\n", \
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__FILE__, __LINE__); \
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__asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
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} while (0)
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#ifdef DEBUG_PROM
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#define prom_debug(x...) prom_printf(x)
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#else
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#define prom_debug(x...)
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#endif
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typedef u32 prom_arg_t;
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struct prom_args {
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u32 service;
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u32 nargs;
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u32 nret;
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prom_arg_t args[10];
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};
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struct prom_t {
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ihandle root;
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phandle chosen;
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int cpu;
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ihandle stdout;
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ihandle mmumap;
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ihandle memory;
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};
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struct mem_map_entry {
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u64 base;
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u64 size;
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};
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typedef u32 cell_t;
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extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7, unsigned long r8,
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unsigned long r9);
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#ifdef CONFIG_PPC64
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extern int enter_prom(struct prom_args *args, unsigned long entry);
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#else
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static inline int enter_prom(struct prom_args *args, unsigned long entry)
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{
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return ((int (*)(struct prom_args *))entry)(args);
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}
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#endif
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extern void copy_and_flush(unsigned long dest, unsigned long src,
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unsigned long size, unsigned long offset);
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/* prom structure */
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static struct prom_t __initdata prom;
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static unsigned long prom_entry __initdata;
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#define PROM_SCRATCH_SIZE 256
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static char __initdata of_stdout_device[256];
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static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
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static unsigned long __initdata dt_header_start;
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static unsigned long __initdata dt_struct_start, dt_struct_end;
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static unsigned long __initdata dt_string_start, dt_string_end;
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static unsigned long __initdata prom_initrd_start, prom_initrd_end;
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#ifdef CONFIG_PPC64
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static int __initdata prom_iommu_force_on;
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static int __initdata prom_iommu_off;
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static unsigned long __initdata prom_tce_alloc_start;
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static unsigned long __initdata prom_tce_alloc_end;
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#endif
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/* Platforms codes are now obsolete in the kernel. Now only used within this
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* file and ultimately gone too. Feel free to change them if you need, they
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* are not shared with anything outside of this file anymore
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*/
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#define PLATFORM_PSERIES 0x0100
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#define PLATFORM_PSERIES_LPAR 0x0101
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#define PLATFORM_LPAR 0x0001
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#define PLATFORM_POWERMAC 0x0400
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#define PLATFORM_GENERIC 0x0500
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#define PLATFORM_OPAL 0x0600
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static int __initdata of_platform;
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static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
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static unsigned long __initdata prom_memory_limit;
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static unsigned long __initdata alloc_top;
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static unsigned long __initdata alloc_top_high;
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static unsigned long __initdata alloc_bottom;
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static unsigned long __initdata rmo_top;
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static unsigned long __initdata ram_top;
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static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
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static int __initdata mem_reserve_cnt;
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static cell_t __initdata regbuf[1024];
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/*
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* Error results ... some OF calls will return "-1" on error, some
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* will return 0, some will return either. To simplify, here are
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* macros to use with any ihandle or phandle return value to check if
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* it is valid
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*/
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#define PROM_ERROR (-1u)
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#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
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#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
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/* This is the one and *ONLY* place where we actually call open
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* firmware.
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*/
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static int __init call_prom(const char *service, int nargs, int nret, ...)
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{
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int i;
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struct prom_args args;
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va_list list;
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args.service = ADDR(service);
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args.nargs = nargs;
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args.nret = nret;
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va_start(list, nret);
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for (i = 0; i < nargs; i++)
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args.args[i] = va_arg(list, prom_arg_t);
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va_end(list);
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for (i = 0; i < nret; i++)
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args.args[nargs+i] = 0;
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if (enter_prom(&args, prom_entry) < 0)
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return PROM_ERROR;
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return (nret > 0) ? args.args[nargs] : 0;
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}
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static int __init call_prom_ret(const char *service, int nargs, int nret,
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prom_arg_t *rets, ...)
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{
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int i;
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struct prom_args args;
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va_list list;
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args.service = ADDR(service);
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args.nargs = nargs;
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args.nret = nret;
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va_start(list, rets);
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for (i = 0; i < nargs; i++)
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args.args[i] = va_arg(list, prom_arg_t);
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va_end(list);
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for (i = 0; i < nret; i++)
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args.args[nargs+i] = 0;
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if (enter_prom(&args, prom_entry) < 0)
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return PROM_ERROR;
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if (rets != NULL)
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for (i = 1; i < nret; ++i)
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rets[i-1] = args.args[nargs+i];
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return (nret > 0) ? args.args[nargs] : 0;
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}
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static void __init prom_print(const char *msg)
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{
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const char *p, *q;
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if (prom.stdout == 0)
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return;
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for (p = msg; *p != 0; p = q) {
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for (q = p; *q != 0 && *q != '\n'; ++q)
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;
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if (q > p)
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call_prom("write", 3, 1, prom.stdout, p, q - p);
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if (*q == 0)
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break;
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++q;
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call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
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}
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}
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static void __init prom_print_hex(unsigned long val)
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{
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int i, nibbles = sizeof(val)*2;
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char buf[sizeof(val)*2+1];
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for (i = nibbles-1; i >= 0; i--) {
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buf[i] = (val & 0xf) + '0';
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if (buf[i] > '9')
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buf[i] += ('a'-'0'-10);
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val >>= 4;
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}
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buf[nibbles] = '\0';
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call_prom("write", 3, 1, prom.stdout, buf, nibbles);
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}
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/* max number of decimal digits in an unsigned long */
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#define UL_DIGITS 21
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static void __init prom_print_dec(unsigned long val)
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{
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int i, size;
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char buf[UL_DIGITS+1];
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for (i = UL_DIGITS-1; i >= 0; i--) {
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buf[i] = (val % 10) + '0';
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val = val/10;
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if (val == 0)
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break;
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}
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/* shift stuff down */
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size = UL_DIGITS - i;
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call_prom("write", 3, 1, prom.stdout, buf+i, size);
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}
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static void __init prom_printf(const char *format, ...)
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{
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const char *p, *q, *s;
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va_list args;
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unsigned long v;
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long vs;
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va_start(args, format);
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for (p = format; *p != 0; p = q) {
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for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
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;
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if (q > p)
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call_prom("write", 3, 1, prom.stdout, p, q - p);
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if (*q == 0)
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break;
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if (*q == '\n') {
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++q;
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call_prom("write", 3, 1, prom.stdout,
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ADDR("\r\n"), 2);
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continue;
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}
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++q;
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if (*q == 0)
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break;
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switch (*q) {
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case 's':
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++q;
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s = va_arg(args, const char *);
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prom_print(s);
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break;
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case 'x':
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++q;
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v = va_arg(args, unsigned long);
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prom_print_hex(v);
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break;
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case 'd':
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++q;
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vs = va_arg(args, int);
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if (vs < 0) {
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prom_print("-");
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vs = -vs;
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}
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prom_print_dec(vs);
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break;
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case 'l':
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++q;
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if (*q == 0)
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break;
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else if (*q == 'x') {
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++q;
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v = va_arg(args, unsigned long);
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prom_print_hex(v);
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} else if (*q == 'u') { /* '%lu' */
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++q;
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v = va_arg(args, unsigned long);
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prom_print_dec(v);
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} else if (*q == 'd') { /* %ld */
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++q;
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vs = va_arg(args, long);
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if (vs < 0) {
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prom_print("-");
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vs = -vs;
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}
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prom_print_dec(vs);
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}
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break;
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}
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}
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}
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static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
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unsigned long align)
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{
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if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
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/*
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* Old OF requires we claim physical and virtual separately
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* and then map explicitly (assuming virtual mode)
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*/
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int ret;
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prom_arg_t result;
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ret = call_prom_ret("call-method", 5, 2, &result,
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ADDR("claim"), prom.memory,
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align, size, virt);
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if (ret != 0 || result == -1)
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return -1;
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ret = call_prom_ret("call-method", 5, 2, &result,
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ADDR("claim"), prom.mmumap,
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align, size, virt);
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if (ret != 0) {
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call_prom("call-method", 4, 1, ADDR("release"),
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prom.memory, size, virt);
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return -1;
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}
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/* the 0x12 is M (coherence) + PP == read/write */
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call_prom("call-method", 6, 1,
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ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
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return virt;
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}
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return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
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(prom_arg_t)align);
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}
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static void __init __attribute__((noreturn)) prom_panic(const char *reason)
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{
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prom_print(reason);
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/* Do not call exit because it clears the screen on pmac
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* it also causes some sort of double-fault on early pmacs */
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if (of_platform == PLATFORM_POWERMAC)
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asm("trap\n");
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/* ToDo: should put up an SRC here on pSeries */
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call_prom("exit", 0, 0);
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for (;;) /* should never get here */
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;
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}
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static int __init prom_next_node(phandle *nodep)
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{
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phandle node;
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if ((node = *nodep) != 0
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&& (*nodep = call_prom("child", 1, 1, node)) != 0)
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return 1;
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if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
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return 1;
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for (;;) {
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if ((node = call_prom("parent", 1, 1, node)) == 0)
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return 0;
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if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
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return 1;
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}
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}
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static int inline prom_getprop(phandle node, const char *pname,
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void *value, size_t valuelen)
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{
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return call_prom("getprop", 4, 1, node, ADDR(pname),
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(u32)(unsigned long) value, (u32) valuelen);
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}
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static int inline prom_getproplen(phandle node, const char *pname)
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{
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return call_prom("getproplen", 2, 1, node, ADDR(pname));
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}
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static void add_string(char **str, const char *q)
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{
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char *p = *str;
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while (*q)
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*p++ = *q++;
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*p++ = ' ';
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*str = p;
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}
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static char *tohex(unsigned int x)
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{
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static char digits[] = "0123456789abcdef";
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static char result[9];
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int i;
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result[8] = 0;
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i = 8;
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do {
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--i;
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result[i] = digits[x & 0xf];
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x >>= 4;
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} while (x != 0 && i > 0);
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return &result[i];
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}
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static int __init prom_setprop(phandle node, const char *nodename,
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const char *pname, void *value, size_t valuelen)
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{
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char cmd[256], *p;
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if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
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return call_prom("setprop", 4, 1, node, ADDR(pname),
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(u32)(unsigned long) value, (u32) valuelen);
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/* gah... setprop doesn't work on longtrail, have to use interpret */
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p = cmd;
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add_string(&p, "dev");
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add_string(&p, nodename);
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add_string(&p, tohex((u32)(unsigned long) value));
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add_string(&p, tohex(valuelen));
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add_string(&p, tohex(ADDR(pname)));
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add_string(&p, tohex(strlen(pname)));
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add_string(&p, "property");
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*p = 0;
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return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
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}
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/* We can't use the standard versions because of relocation headaches. */
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#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
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|| ('a' <= (c) && (c) <= 'f') \
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|| ('A' <= (c) && (c) <= 'F'))
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|
|
#define isdigit(c) ('0' <= (c) && (c) <= '9')
|
|
#define islower(c) ('a' <= (c) && (c) <= 'z')
|
|
#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
|
|
|
|
unsigned long prom_strtoul(const char *cp, const char **endp)
|
|
{
|
|
unsigned long result = 0, base = 10, value;
|
|
|
|
if (*cp == '0') {
|
|
base = 8;
|
|
cp++;
|
|
if (toupper(*cp) == 'X') {
|
|
cp++;
|
|
base = 16;
|
|
}
|
|
}
|
|
|
|
while (isxdigit(*cp) &&
|
|
(value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
|
|
result = result * base + value;
|
|
cp++;
|
|
}
|
|
|
|
if (endp)
|
|
*endp = cp;
|
|
|
|
return result;
|
|
}
|
|
|
|
unsigned long prom_memparse(const char *ptr, const char **retptr)
|
|
{
|
|
unsigned long ret = prom_strtoul(ptr, retptr);
|
|
int shift = 0;
|
|
|
|
/*
|
|
* We can't use a switch here because GCC *may* generate a
|
|
* jump table which won't work, because we're not running at
|
|
* the address we're linked at.
|
|
*/
|
|
if ('G' == **retptr || 'g' == **retptr)
|
|
shift = 30;
|
|
|
|
if ('M' == **retptr || 'm' == **retptr)
|
|
shift = 20;
|
|
|
|
if ('K' == **retptr || 'k' == **retptr)
|
|
shift = 10;
|
|
|
|
if (shift) {
|
|
ret <<= shift;
|
|
(*retptr)++;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Early parsing of the command line passed to the kernel, used for
|
|
* "mem=x" and the options that affect the iommu
|
|
*/
|
|
static void __init early_cmdline_parse(void)
|
|
{
|
|
const char *opt;
|
|
|
|
char *p;
|
|
int l = 0;
|
|
|
|
prom_cmd_line[0] = 0;
|
|
p = prom_cmd_line;
|
|
if ((long)prom.chosen > 0)
|
|
l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
|
|
#ifdef CONFIG_CMDLINE
|
|
if (l <= 0 || p[0] == '\0') /* dbl check */
|
|
strlcpy(prom_cmd_line,
|
|
CONFIG_CMDLINE, sizeof(prom_cmd_line));
|
|
#endif /* CONFIG_CMDLINE */
|
|
prom_printf("command line: %s\n", prom_cmd_line);
|
|
|
|
#ifdef CONFIG_PPC64
|
|
opt = strstr(prom_cmd_line, "iommu=");
|
|
if (opt) {
|
|
prom_printf("iommu opt is: %s\n", opt);
|
|
opt += 6;
|
|
while (*opt && *opt == ' ')
|
|
opt++;
|
|
if (!strncmp(opt, "off", 3))
|
|
prom_iommu_off = 1;
|
|
else if (!strncmp(opt, "force", 5))
|
|
prom_iommu_force_on = 1;
|
|
}
|
|
#endif
|
|
opt = strstr(prom_cmd_line, "mem=");
|
|
if (opt) {
|
|
opt += 4;
|
|
prom_memory_limit = prom_memparse(opt, (const char **)&opt);
|
|
#ifdef CONFIG_PPC64
|
|
/* Align to 16 MB == size of ppc64 large page */
|
|
prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
|
|
/*
|
|
* There are two methods for telling firmware what our capabilities are.
|
|
* Newer machines have an "ibm,client-architecture-support" method on the
|
|
* root node. For older machines, we have to call the "process-elf-header"
|
|
* method in the /packages/elf-loader node, passing it a fake 32-bit
|
|
* ELF header containing a couple of PT_NOTE sections that contain
|
|
* structures that contain various information.
|
|
*/
|
|
|
|
/*
|
|
* New method - extensible architecture description vector.
|
|
*
|
|
* Because the description vector contains a mix of byte and word
|
|
* values, we declare it as an unsigned char array, and use this
|
|
* macro to put word values in.
|
|
*/
|
|
#define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
|
|
((x) >> 8) & 0xff, (x) & 0xff
|
|
|
|
/* Option vector bits - generic bits in byte 1 */
|
|
#define OV_IGNORE 0x80 /* ignore this vector */
|
|
#define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/
|
|
|
|
/* Option vector 1: processor architectures supported */
|
|
#define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */
|
|
#define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */
|
|
#define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */
|
|
#define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */
|
|
#define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */
|
|
#define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */
|
|
#define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */
|
|
#define OV1_PPC_2_07 0x01 /* set if we support PowerPC 2.07 */
|
|
|
|
/* Option vector 2: Open Firmware options supported */
|
|
#define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */
|
|
|
|
/* Option vector 3: processor options supported */
|
|
#define OV3_FP 0x80 /* floating point */
|
|
#define OV3_VMX 0x40 /* VMX/Altivec */
|
|
#define OV3_DFP 0x20 /* decimal FP */
|
|
|
|
/* Option vector 4: IBM PAPR implementation */
|
|
#define OV4_MIN_ENT_CAP 0x01 /* minimum VP entitled capacity */
|
|
|
|
/* Option vector 5: PAPR/OF options supported */
|
|
#define OV5_LPAR 0x80 /* logical partitioning supported */
|
|
#define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */
|
|
/* ibm,dynamic-reconfiguration-memory property supported */
|
|
#define OV5_DRCONF_MEMORY 0x20
|
|
#define OV5_LARGE_PAGES 0x10 /* large pages supported */
|
|
#define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */
|
|
/* PCIe/MSI support. Without MSI full PCIe is not supported */
|
|
#ifdef CONFIG_PCI_MSI
|
|
#define OV5_MSI 0x01 /* PCIe/MSI support */
|
|
#else
|
|
#define OV5_MSI 0x00
|
|
#endif /* CONFIG_PCI_MSI */
|
|
#ifdef CONFIG_PPC_SMLPAR
|
|
#define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */
|
|
#define OV5_XCMO 0x40 /* Page Coalescing */
|
|
#else
|
|
#define OV5_CMO 0x00
|
|
#define OV5_XCMO 0x00
|
|
#endif
|
|
#define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */
|
|
#define OV5_PFO_HW_RNG 0x80 /* PFO Random Number Generator */
|
|
#define OV5_PFO_HW_842 0x40 /* PFO Compression Accelerator */
|
|
#define OV5_PFO_HW_ENCR 0x20 /* PFO Encryption Accelerator */
|
|
#define OV5_SUB_PROCESSORS 0x01 /* 1,2,or 4 Sub-Processors supported */
|
|
|
|
/* Option Vector 6: IBM PAPR hints */
|
|
#define OV6_LINUX 0x02 /* Linux is our OS */
|
|
|
|
/*
|
|
* The architecture vector has an array of PVR mask/value pairs,
|
|
* followed by # option vectors - 1, followed by the option vectors.
|
|
*/
|
|
static unsigned char ibm_architecture_vec[] = {
|
|
W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */
|
|
W(0xffff0000), W(0x003e0000), /* POWER6 */
|
|
W(0xffff0000), W(0x003f0000), /* POWER7 */
|
|
W(0xffff0000), W(0x004b0000), /* POWER8 */
|
|
W(0xffffffff), W(0x0f000004), /* all 2.07-compliant */
|
|
W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */
|
|
W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */
|
|
W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */
|
|
6 - 1, /* 6 option vectors */
|
|
|
|
/* option vector 1: processor architectures supported */
|
|
3 - 2, /* length */
|
|
0, /* don't ignore, don't halt */
|
|
OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
|
|
OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
|
|
|
|
/* option vector 2: Open Firmware options supported */
|
|
34 - 2, /* length */
|
|
OV2_REAL_MODE,
|
|
0, 0,
|
|
W(0xffffffff), /* real_base */
|
|
W(0xffffffff), /* real_size */
|
|
W(0xffffffff), /* virt_base */
|
|
W(0xffffffff), /* virt_size */
|
|
W(0xffffffff), /* load_base */
|
|
W(256), /* 256MB min RMA */
|
|
W(0xffffffff), /* full client load */
|
|
0, /* min RMA percentage of total RAM */
|
|
48, /* max log_2(hash table size) */
|
|
|
|
/* option vector 3: processor options supported */
|
|
3 - 2, /* length */
|
|
0, /* don't ignore, don't halt */
|
|
OV3_FP | OV3_VMX | OV3_DFP,
|
|
|
|
/* option vector 4: IBM PAPR implementation */
|
|
3 - 2, /* length */
|
|
0, /* don't halt */
|
|
OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
|
|
|
|
/* option vector 5: PAPR/OF options */
|
|
19 - 2, /* length */
|
|
0, /* don't ignore, don't halt */
|
|
OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY |
|
|
OV5_DONATE_DEDICATE_CPU | OV5_MSI,
|
|
0,
|
|
OV5_CMO | OV5_XCMO,
|
|
OV5_TYPE1_AFFINITY,
|
|
0,
|
|
0,
|
|
0,
|
|
/* WARNING: The offset of the "number of cores" field below
|
|
* must match by the macro below. Update the definition if
|
|
* the structure layout changes.
|
|
*/
|
|
#define IBM_ARCH_VEC_NRCORES_OFFSET 117
|
|
W(NR_CPUS), /* number of cores supported */
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
OV5_PFO_HW_RNG | OV5_PFO_HW_ENCR | OV5_PFO_HW_842,
|
|
OV5_SUB_PROCESSORS,
|
|
/* option vector 6: IBM PAPR hints */
|
|
4 - 2, /* length */
|
|
0,
|
|
0,
|
|
OV6_LINUX,
|
|
|
|
};
|
|
|
|
/* Old method - ELF header with PT_NOTE sections */
|
|
static struct fake_elf {
|
|
Elf32_Ehdr elfhdr;
|
|
Elf32_Phdr phdr[2];
|
|
struct chrpnote {
|
|
u32 namesz;
|
|
u32 descsz;
|
|
u32 type;
|
|
char name[8]; /* "PowerPC" */
|
|
struct chrpdesc {
|
|
u32 real_mode;
|
|
u32 real_base;
|
|
u32 real_size;
|
|
u32 virt_base;
|
|
u32 virt_size;
|
|
u32 load_base;
|
|
} chrpdesc;
|
|
} chrpnote;
|
|
struct rpanote {
|
|
u32 namesz;
|
|
u32 descsz;
|
|
u32 type;
|
|
char name[24]; /* "IBM,RPA-Client-Config" */
|
|
struct rpadesc {
|
|
u32 lpar_affinity;
|
|
u32 min_rmo_size;
|
|
u32 min_rmo_percent;
|
|
u32 max_pft_size;
|
|
u32 splpar;
|
|
u32 min_load;
|
|
u32 new_mem_def;
|
|
u32 ignore_me;
|
|
} rpadesc;
|
|
} rpanote;
|
|
} fake_elf = {
|
|
.elfhdr = {
|
|
.e_ident = { 0x7f, 'E', 'L', 'F',
|
|
ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
|
|
.e_type = ET_EXEC, /* yeah right */
|
|
.e_machine = EM_PPC,
|
|
.e_version = EV_CURRENT,
|
|
.e_phoff = offsetof(struct fake_elf, phdr),
|
|
.e_phentsize = sizeof(Elf32_Phdr),
|
|
.e_phnum = 2
|
|
},
|
|
.phdr = {
|
|
[0] = {
|
|
.p_type = PT_NOTE,
|
|
.p_offset = offsetof(struct fake_elf, chrpnote),
|
|
.p_filesz = sizeof(struct chrpnote)
|
|
}, [1] = {
|
|
.p_type = PT_NOTE,
|
|
.p_offset = offsetof(struct fake_elf, rpanote),
|
|
.p_filesz = sizeof(struct rpanote)
|
|
}
|
|
},
|
|
.chrpnote = {
|
|
.namesz = sizeof("PowerPC"),
|
|
.descsz = sizeof(struct chrpdesc),
|
|
.type = 0x1275,
|
|
.name = "PowerPC",
|
|
.chrpdesc = {
|
|
.real_mode = ~0U, /* ~0 means "don't care" */
|
|
.real_base = ~0U,
|
|
.real_size = ~0U,
|
|
.virt_base = ~0U,
|
|
.virt_size = ~0U,
|
|
.load_base = ~0U
|
|
},
|
|
},
|
|
.rpanote = {
|
|
.namesz = sizeof("IBM,RPA-Client-Config"),
|
|
.descsz = sizeof(struct rpadesc),
|
|
.type = 0x12759999,
|
|
.name = "IBM,RPA-Client-Config",
|
|
.rpadesc = {
|
|
.lpar_affinity = 0,
|
|
.min_rmo_size = 64, /* in megabytes */
|
|
.min_rmo_percent = 0,
|
|
.max_pft_size = 48, /* 2^48 bytes max PFT size */
|
|
.splpar = 1,
|
|
.min_load = ~0U,
|
|
.new_mem_def = 0
|
|
}
|
|
}
|
|
};
|
|
|
|
static int __init prom_count_smt_threads(void)
|
|
{
|
|
phandle node;
|
|
char type[64];
|
|
unsigned int plen;
|
|
|
|
/* Pick up th first CPU node we can find */
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
type[0] = 0;
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
|
|
if (strcmp(type, "cpu"))
|
|
continue;
|
|
/*
|
|
* There is an entry for each smt thread, each entry being
|
|
* 4 bytes long. All cpus should have the same number of
|
|
* smt threads, so return after finding the first.
|
|
*/
|
|
plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
|
|
if (plen == PROM_ERROR)
|
|
break;
|
|
plen >>= 2;
|
|
prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
|
|
|
|
/* Sanity check */
|
|
if (plen < 1 || plen > 64) {
|
|
prom_printf("Threads per core %lu out of bounds, assuming 1\n",
|
|
(unsigned long)plen);
|
|
return 1;
|
|
}
|
|
return plen;
|
|
}
|
|
prom_debug("No threads found, assuming 1 per core\n");
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
static void __init prom_send_capabilities(void)
|
|
{
|
|
ihandle elfloader, root;
|
|
prom_arg_t ret;
|
|
u32 *cores;
|
|
|
|
root = call_prom("open", 1, 1, ADDR("/"));
|
|
if (root != 0) {
|
|
/* We need to tell the FW about the number of cores we support.
|
|
*
|
|
* To do that, we count the number of threads on the first core
|
|
* (we assume this is the same for all cores) and use it to
|
|
* divide NR_CPUS.
|
|
*/
|
|
cores = (u32 *)&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET];
|
|
if (*cores != NR_CPUS) {
|
|
prom_printf("WARNING ! "
|
|
"ibm_architecture_vec structure inconsistent: %lu!\n",
|
|
*cores);
|
|
} else {
|
|
*cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
|
|
prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n",
|
|
*cores, NR_CPUS);
|
|
}
|
|
|
|
/* try calling the ibm,client-architecture-support method */
|
|
prom_printf("Calling ibm,client-architecture-support...");
|
|
if (call_prom_ret("call-method", 3, 2, &ret,
|
|
ADDR("ibm,client-architecture-support"),
|
|
root,
|
|
ADDR(ibm_architecture_vec)) == 0) {
|
|
/* the call exists... */
|
|
if (ret)
|
|
prom_printf("\nWARNING: ibm,client-architecture"
|
|
"-support call FAILED!\n");
|
|
call_prom("close", 1, 0, root);
|
|
prom_printf(" done\n");
|
|
return;
|
|
}
|
|
call_prom("close", 1, 0, root);
|
|
prom_printf(" not implemented\n");
|
|
}
|
|
|
|
/* no ibm,client-architecture-support call, try the old way */
|
|
elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
|
|
if (elfloader == 0) {
|
|
prom_printf("couldn't open /packages/elf-loader\n");
|
|
return;
|
|
}
|
|
call_prom("call-method", 3, 1, ADDR("process-elf-header"),
|
|
elfloader, ADDR(&fake_elf));
|
|
call_prom("close", 1, 0, elfloader);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Memory allocation strategy... our layout is normally:
|
|
*
|
|
* at 14Mb or more we have vmlinux, then a gap and initrd. In some
|
|
* rare cases, initrd might end up being before the kernel though.
|
|
* We assume this won't override the final kernel at 0, we have no
|
|
* provision to handle that in this version, but it should hopefully
|
|
* never happen.
|
|
*
|
|
* alloc_top is set to the top of RMO, eventually shrink down if the
|
|
* TCEs overlap
|
|
*
|
|
* alloc_bottom is set to the top of kernel/initrd
|
|
*
|
|
* from there, allocations are done this way : rtas is allocated
|
|
* topmost, and the device-tree is allocated from the bottom. We try
|
|
* to grow the device-tree allocation as we progress. If we can't,
|
|
* then we fail, we don't currently have a facility to restart
|
|
* elsewhere, but that shouldn't be necessary.
|
|
*
|
|
* Note that calls to reserve_mem have to be done explicitly, memory
|
|
* allocated with either alloc_up or alloc_down isn't automatically
|
|
* reserved.
|
|
*/
|
|
|
|
|
|
/*
|
|
* Allocates memory in the RMO upward from the kernel/initrd
|
|
*
|
|
* When align is 0, this is a special case, it means to allocate in place
|
|
* at the current location of alloc_bottom or fail (that is basically
|
|
* extending the previous allocation). Used for the device-tree flattening
|
|
*/
|
|
static unsigned long __init alloc_up(unsigned long size, unsigned long align)
|
|
{
|
|
unsigned long base = alloc_bottom;
|
|
unsigned long addr = 0;
|
|
|
|
if (align)
|
|
base = _ALIGN_UP(base, align);
|
|
prom_debug("alloc_up(%x, %x)\n", size, align);
|
|
if (ram_top == 0)
|
|
prom_panic("alloc_up() called with mem not initialized\n");
|
|
|
|
if (align)
|
|
base = _ALIGN_UP(alloc_bottom, align);
|
|
else
|
|
base = alloc_bottom;
|
|
|
|
for(; (base + size) <= alloc_top;
|
|
base = _ALIGN_UP(base + 0x100000, align)) {
|
|
prom_debug(" trying: 0x%x\n\r", base);
|
|
addr = (unsigned long)prom_claim(base, size, 0);
|
|
if (addr != PROM_ERROR && addr != 0)
|
|
break;
|
|
addr = 0;
|
|
if (align == 0)
|
|
break;
|
|
}
|
|
if (addr == 0)
|
|
return 0;
|
|
alloc_bottom = addr + size;
|
|
|
|
prom_debug(" -> %x\n", addr);
|
|
prom_debug(" alloc_bottom : %x\n", alloc_bottom);
|
|
prom_debug(" alloc_top : %x\n", alloc_top);
|
|
prom_debug(" alloc_top_hi : %x\n", alloc_top_high);
|
|
prom_debug(" rmo_top : %x\n", rmo_top);
|
|
prom_debug(" ram_top : %x\n", ram_top);
|
|
|
|
return addr;
|
|
}
|
|
|
|
/*
|
|
* Allocates memory downward, either from top of RMO, or if highmem
|
|
* is set, from the top of RAM. Note that this one doesn't handle
|
|
* failures. It does claim memory if highmem is not set.
|
|
*/
|
|
static unsigned long __init alloc_down(unsigned long size, unsigned long align,
|
|
int highmem)
|
|
{
|
|
unsigned long base, addr = 0;
|
|
|
|
prom_debug("alloc_down(%x, %x, %s)\n", size, align,
|
|
highmem ? "(high)" : "(low)");
|
|
if (ram_top == 0)
|
|
prom_panic("alloc_down() called with mem not initialized\n");
|
|
|
|
if (highmem) {
|
|
/* Carve out storage for the TCE table. */
|
|
addr = _ALIGN_DOWN(alloc_top_high - size, align);
|
|
if (addr <= alloc_bottom)
|
|
return 0;
|
|
/* Will we bump into the RMO ? If yes, check out that we
|
|
* didn't overlap existing allocations there, if we did,
|
|
* we are dead, we must be the first in town !
|
|
*/
|
|
if (addr < rmo_top) {
|
|
/* Good, we are first */
|
|
if (alloc_top == rmo_top)
|
|
alloc_top = rmo_top = addr;
|
|
else
|
|
return 0;
|
|
}
|
|
alloc_top_high = addr;
|
|
goto bail;
|
|
}
|
|
|
|
base = _ALIGN_DOWN(alloc_top - size, align);
|
|
for (; base > alloc_bottom;
|
|
base = _ALIGN_DOWN(base - 0x100000, align)) {
|
|
prom_debug(" trying: 0x%x\n\r", base);
|
|
addr = (unsigned long)prom_claim(base, size, 0);
|
|
if (addr != PROM_ERROR && addr != 0)
|
|
break;
|
|
addr = 0;
|
|
}
|
|
if (addr == 0)
|
|
return 0;
|
|
alloc_top = addr;
|
|
|
|
bail:
|
|
prom_debug(" -> %x\n", addr);
|
|
prom_debug(" alloc_bottom : %x\n", alloc_bottom);
|
|
prom_debug(" alloc_top : %x\n", alloc_top);
|
|
prom_debug(" alloc_top_hi : %x\n", alloc_top_high);
|
|
prom_debug(" rmo_top : %x\n", rmo_top);
|
|
prom_debug(" ram_top : %x\n", ram_top);
|
|
|
|
return addr;
|
|
}
|
|
|
|
/*
|
|
* Parse a "reg" cell
|
|
*/
|
|
static unsigned long __init prom_next_cell(int s, cell_t **cellp)
|
|
{
|
|
cell_t *p = *cellp;
|
|
unsigned long r = 0;
|
|
|
|
/* Ignore more than 2 cells */
|
|
while (s > sizeof(unsigned long) / 4) {
|
|
p++;
|
|
s--;
|
|
}
|
|
r = *p++;
|
|
#ifdef CONFIG_PPC64
|
|
if (s > 1) {
|
|
r <<= 32;
|
|
r |= *(p++);
|
|
}
|
|
#endif
|
|
*cellp = p;
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* Very dumb function for adding to the memory reserve list, but
|
|
* we don't need anything smarter at this point
|
|
*
|
|
* XXX Eventually check for collisions. They should NEVER happen.
|
|
* If problems seem to show up, it would be a good start to track
|
|
* them down.
|
|
*/
|
|
static void __init reserve_mem(u64 base, u64 size)
|
|
{
|
|
u64 top = base + size;
|
|
unsigned long cnt = mem_reserve_cnt;
|
|
|
|
if (size == 0)
|
|
return;
|
|
|
|
/* We need to always keep one empty entry so that we
|
|
* have our terminator with "size" set to 0 since we are
|
|
* dumb and just copy this entire array to the boot params
|
|
*/
|
|
base = _ALIGN_DOWN(base, PAGE_SIZE);
|
|
top = _ALIGN_UP(top, PAGE_SIZE);
|
|
size = top - base;
|
|
|
|
if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
|
|
prom_panic("Memory reserve map exhausted !\n");
|
|
mem_reserve_map[cnt].base = base;
|
|
mem_reserve_map[cnt].size = size;
|
|
mem_reserve_cnt = cnt + 1;
|
|
}
|
|
|
|
/*
|
|
* Initialize memory allocation mechanism, parse "memory" nodes and
|
|
* obtain that way the top of memory and RMO to setup out local allocator
|
|
*/
|
|
static void __init prom_init_mem(void)
|
|
{
|
|
phandle node;
|
|
char *path, type[64];
|
|
unsigned int plen;
|
|
cell_t *p, *endp;
|
|
u32 rac, rsc;
|
|
|
|
/*
|
|
* We iterate the memory nodes to find
|
|
* 1) top of RMO (first node)
|
|
* 2) top of memory
|
|
*/
|
|
rac = 2;
|
|
prom_getprop(prom.root, "#address-cells", &rac, sizeof(rac));
|
|
rsc = 1;
|
|
prom_getprop(prom.root, "#size-cells", &rsc, sizeof(rsc));
|
|
prom_debug("root_addr_cells: %x\n", (unsigned long) rac);
|
|
prom_debug("root_size_cells: %x\n", (unsigned long) rsc);
|
|
|
|
prom_debug("scanning memory:\n");
|
|
path = prom_scratch;
|
|
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
type[0] = 0;
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
|
|
if (type[0] == 0) {
|
|
/*
|
|
* CHRP Longtrail machines have no device_type
|
|
* on the memory node, so check the name instead...
|
|
*/
|
|
prom_getprop(node, "name", type, sizeof(type));
|
|
}
|
|
if (strcmp(type, "memory"))
|
|
continue;
|
|
|
|
plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
|
|
if (plen > sizeof(regbuf)) {
|
|
prom_printf("memory node too large for buffer !\n");
|
|
plen = sizeof(regbuf);
|
|
}
|
|
p = regbuf;
|
|
endp = p + (plen / sizeof(cell_t));
|
|
|
|
#ifdef DEBUG_PROM
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
|
call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
|
|
prom_debug(" node %s :\n", path);
|
|
#endif /* DEBUG_PROM */
|
|
|
|
while ((endp - p) >= (rac + rsc)) {
|
|
unsigned long base, size;
|
|
|
|
base = prom_next_cell(rac, &p);
|
|
size = prom_next_cell(rsc, &p);
|
|
|
|
if (size == 0)
|
|
continue;
|
|
prom_debug(" %x %x\n", base, size);
|
|
if (base == 0 && (of_platform & PLATFORM_LPAR))
|
|
rmo_top = size;
|
|
if ((base + size) > ram_top)
|
|
ram_top = base + size;
|
|
}
|
|
}
|
|
|
|
alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
|
|
|
|
/*
|
|
* If prom_memory_limit is set we reduce the upper limits *except* for
|
|
* alloc_top_high. This must be the real top of RAM so we can put
|
|
* TCE's up there.
|
|
*/
|
|
|
|
alloc_top_high = ram_top;
|
|
|
|
if (prom_memory_limit) {
|
|
if (prom_memory_limit <= alloc_bottom) {
|
|
prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
|
|
prom_memory_limit);
|
|
prom_memory_limit = 0;
|
|
} else if (prom_memory_limit >= ram_top) {
|
|
prom_printf("Ignoring mem=%x >= ram_top.\n",
|
|
prom_memory_limit);
|
|
prom_memory_limit = 0;
|
|
} else {
|
|
ram_top = prom_memory_limit;
|
|
rmo_top = min(rmo_top, prom_memory_limit);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Setup our top alloc point, that is top of RMO or top of
|
|
* segment 0 when running non-LPAR.
|
|
* Some RS64 machines have buggy firmware where claims up at
|
|
* 1GB fail. Cap at 768MB as a workaround.
|
|
* Since 768MB is plenty of room, and we need to cap to something
|
|
* reasonable on 32-bit, cap at 768MB on all machines.
|
|
*/
|
|
if (!rmo_top)
|
|
rmo_top = ram_top;
|
|
rmo_top = min(0x30000000ul, rmo_top);
|
|
alloc_top = rmo_top;
|
|
alloc_top_high = ram_top;
|
|
|
|
/*
|
|
* Check if we have an initrd after the kernel but still inside
|
|
* the RMO. If we do move our bottom point to after it.
|
|
*/
|
|
if (prom_initrd_start &&
|
|
prom_initrd_start < rmo_top &&
|
|
prom_initrd_end > alloc_bottom)
|
|
alloc_bottom = PAGE_ALIGN(prom_initrd_end);
|
|
|
|
prom_printf("memory layout at init:\n");
|
|
prom_printf(" memory_limit : %x (16 MB aligned)\n", prom_memory_limit);
|
|
prom_printf(" alloc_bottom : %x\n", alloc_bottom);
|
|
prom_printf(" alloc_top : %x\n", alloc_top);
|
|
prom_printf(" alloc_top_hi : %x\n", alloc_top_high);
|
|
prom_printf(" rmo_top : %x\n", rmo_top);
|
|
prom_printf(" ram_top : %x\n", ram_top);
|
|
}
|
|
|
|
static void __init prom_close_stdin(void)
|
|
{
|
|
ihandle val;
|
|
|
|
if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0)
|
|
call_prom("close", 1, 0, val);
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
|
|
static u64 __initdata prom_opal_size;
|
|
static u64 __initdata prom_opal_align;
|
|
static int __initdata prom_rtas_start_cpu;
|
|
static u64 __initdata prom_rtas_data;
|
|
static u64 __initdata prom_rtas_entry;
|
|
|
|
#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
|
|
static u64 __initdata prom_opal_base;
|
|
static u64 __initdata prom_opal_entry;
|
|
#endif
|
|
|
|
/* XXX Don't change this structure without updating opal-takeover.S */
|
|
static struct opal_secondary_data {
|
|
s64 ack; /* 0 */
|
|
u64 go; /* 8 */
|
|
struct opal_takeover_args args; /* 16 */
|
|
} opal_secondary_data;
|
|
|
|
extern char opal_secondary_entry;
|
|
|
|
static void __init prom_query_opal(void)
|
|
{
|
|
long rc;
|
|
|
|
/* We must not query for OPAL presence on a machine that
|
|
* supports TNK takeover (970 blades), as this uses the same
|
|
* h-call with different arguments and will crash
|
|
*/
|
|
if (PHANDLE_VALID(call_prom("finddevice", 1, 1,
|
|
ADDR("/tnk-memory-map")))) {
|
|
prom_printf("TNK takeover detected, skipping OPAL check\n");
|
|
return;
|
|
}
|
|
|
|
prom_printf("Querying for OPAL presence... ");
|
|
rc = opal_query_takeover(&prom_opal_size,
|
|
&prom_opal_align);
|
|
prom_debug("(rc = %ld) ", rc);
|
|
if (rc != 0) {
|
|
prom_printf("not there.\n");
|
|
return;
|
|
}
|
|
of_platform = PLATFORM_OPAL;
|
|
prom_printf(" there !\n");
|
|
prom_debug(" opal_size = 0x%lx\n", prom_opal_size);
|
|
prom_debug(" opal_align = 0x%lx\n", prom_opal_align);
|
|
if (prom_opal_align < 0x10000)
|
|
prom_opal_align = 0x10000;
|
|
}
|
|
|
|
static int prom_rtas_call(int token, int nargs, int nret, int *outputs, ...)
|
|
{
|
|
struct rtas_args rtas_args;
|
|
va_list list;
|
|
int i;
|
|
|
|
rtas_args.token = token;
|
|
rtas_args.nargs = nargs;
|
|
rtas_args.nret = nret;
|
|
rtas_args.rets = (rtas_arg_t *)&(rtas_args.args[nargs]);
|
|
va_start(list, outputs);
|
|
for (i = 0; i < nargs; ++i)
|
|
rtas_args.args[i] = va_arg(list, rtas_arg_t);
|
|
va_end(list);
|
|
|
|
for (i = 0; i < nret; ++i)
|
|
rtas_args.rets[i] = 0;
|
|
|
|
opal_enter_rtas(&rtas_args, prom_rtas_data,
|
|
prom_rtas_entry);
|
|
|
|
if (nret > 1 && outputs != NULL)
|
|
for (i = 0; i < nret-1; ++i)
|
|
outputs[i] = rtas_args.rets[i+1];
|
|
return (nret > 0)? rtas_args.rets[0]: 0;
|
|
}
|
|
|
|
static void __init prom_opal_hold_cpus(void)
|
|
{
|
|
int i, cnt, cpu, rc;
|
|
long j;
|
|
phandle node;
|
|
char type[64];
|
|
u32 servers[8];
|
|
void *entry = (unsigned long *)&opal_secondary_entry;
|
|
struct opal_secondary_data *data = &opal_secondary_data;
|
|
|
|
prom_debug("prom_opal_hold_cpus: start...\n");
|
|
prom_debug(" - entry = 0x%x\n", entry);
|
|
prom_debug(" - data = 0x%x\n", data);
|
|
|
|
data->ack = -1;
|
|
data->go = 0;
|
|
|
|
/* look for cpus */
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
type[0] = 0;
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
if (strcmp(type, "cpu") != 0)
|
|
continue;
|
|
|
|
/* Skip non-configured cpus. */
|
|
if (prom_getprop(node, "status", type, sizeof(type)) > 0)
|
|
if (strcmp(type, "okay") != 0)
|
|
continue;
|
|
|
|
cnt = prom_getprop(node, "ibm,ppc-interrupt-server#s", servers,
|
|
sizeof(servers));
|
|
if (cnt == PROM_ERROR)
|
|
break;
|
|
cnt >>= 2;
|
|
for (i = 0; i < cnt; i++) {
|
|
cpu = servers[i];
|
|
prom_debug("CPU %d ... ", cpu);
|
|
if (cpu == prom.cpu) {
|
|
prom_debug("booted !\n");
|
|
continue;
|
|
}
|
|
prom_debug("starting ... ");
|
|
|
|
/* Init the acknowledge var which will be reset by
|
|
* the secondary cpu when it awakens from its OF
|
|
* spinloop.
|
|
*/
|
|
data->ack = -1;
|
|
rc = prom_rtas_call(prom_rtas_start_cpu, 3, 1,
|
|
NULL, cpu, entry, data);
|
|
prom_debug("rtas rc=%d ...", rc);
|
|
|
|
for (j = 0; j < 100000000 && data->ack == -1; j++) {
|
|
HMT_low();
|
|
mb();
|
|
}
|
|
HMT_medium();
|
|
if (data->ack != -1)
|
|
prom_debug("done, PIR=0x%x\n", data->ack);
|
|
else
|
|
prom_debug("timeout !\n");
|
|
}
|
|
}
|
|
prom_debug("prom_opal_hold_cpus: end...\n");
|
|
}
|
|
|
|
static void __init prom_opal_takeover(void)
|
|
{
|
|
struct opal_secondary_data *data = &opal_secondary_data;
|
|
struct opal_takeover_args *args = &data->args;
|
|
u64 align = prom_opal_align;
|
|
u64 top_addr, opal_addr;
|
|
|
|
args->k_image = (u64)_stext;
|
|
args->k_size = _end - _stext;
|
|
args->k_entry = 0;
|
|
args->k_entry2 = 0x60;
|
|
|
|
top_addr = _ALIGN_UP(args->k_size, align);
|
|
|
|
if (prom_initrd_start != 0) {
|
|
args->rd_image = prom_initrd_start;
|
|
args->rd_size = prom_initrd_end - args->rd_image;
|
|
args->rd_loc = top_addr;
|
|
top_addr = _ALIGN_UP(args->rd_loc + args->rd_size, align);
|
|
}
|
|
|
|
/* Pickup an address for the HAL. We want to go really high
|
|
* up to avoid problem with future kexecs. On the other hand
|
|
* we don't want to be all over the TCEs on P5IOC2 machines
|
|
* which are going to be up there too. We assume the machine
|
|
* has plenty of memory, and we ask for the HAL for now to
|
|
* be just below the 1G point, or above the initrd
|
|
*/
|
|
opal_addr = _ALIGN_DOWN(0x40000000 - prom_opal_size, align);
|
|
if (opal_addr < top_addr)
|
|
opal_addr = top_addr;
|
|
args->hal_addr = opal_addr;
|
|
|
|
/* Copy the command line to the kernel image */
|
|
strlcpy(boot_command_line, prom_cmd_line,
|
|
COMMAND_LINE_SIZE);
|
|
|
|
prom_debug(" k_image = 0x%lx\n", args->k_image);
|
|
prom_debug(" k_size = 0x%lx\n", args->k_size);
|
|
prom_debug(" k_entry = 0x%lx\n", args->k_entry);
|
|
prom_debug(" k_entry2 = 0x%lx\n", args->k_entry2);
|
|
prom_debug(" hal_addr = 0x%lx\n", args->hal_addr);
|
|
prom_debug(" rd_image = 0x%lx\n", args->rd_image);
|
|
prom_debug(" rd_size = 0x%lx\n", args->rd_size);
|
|
prom_debug(" rd_loc = 0x%lx\n", args->rd_loc);
|
|
prom_printf("Performing OPAL takeover,this can take a few minutes..\n");
|
|
prom_close_stdin();
|
|
mb();
|
|
data->go = 1;
|
|
for (;;)
|
|
opal_do_takeover(args);
|
|
}
|
|
|
|
/*
|
|
* Allocate room for and instantiate OPAL
|
|
*/
|
|
static void __init prom_instantiate_opal(void)
|
|
{
|
|
phandle opal_node;
|
|
ihandle opal_inst;
|
|
u64 base, entry;
|
|
u64 size = 0, align = 0x10000;
|
|
u32 rets[2];
|
|
|
|
prom_debug("prom_instantiate_opal: start...\n");
|
|
|
|
opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal"));
|
|
prom_debug("opal_node: %x\n", opal_node);
|
|
if (!PHANDLE_VALID(opal_node))
|
|
return;
|
|
|
|
prom_getprop(opal_node, "opal-runtime-size", &size, sizeof(size));
|
|
if (size == 0)
|
|
return;
|
|
prom_getprop(opal_node, "opal-runtime-alignment", &align,
|
|
sizeof(align));
|
|
|
|
base = alloc_down(size, align, 0);
|
|
if (base == 0) {
|
|
prom_printf("OPAL allocation failed !\n");
|
|
return;
|
|
}
|
|
|
|
opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal"));
|
|
if (!IHANDLE_VALID(opal_inst)) {
|
|
prom_printf("opening opal package failed (%x)\n", opal_inst);
|
|
return;
|
|
}
|
|
|
|
prom_printf("instantiating opal at 0x%x...", base);
|
|
|
|
if (call_prom_ret("call-method", 4, 3, rets,
|
|
ADDR("load-opal-runtime"),
|
|
opal_inst,
|
|
base >> 32, base & 0xffffffff) != 0
|
|
|| (rets[0] == 0 && rets[1] == 0)) {
|
|
prom_printf(" failed\n");
|
|
return;
|
|
}
|
|
entry = (((u64)rets[0]) << 32) | rets[1];
|
|
|
|
prom_printf(" done\n");
|
|
|
|
reserve_mem(base, size);
|
|
|
|
prom_debug("opal base = 0x%x\n", base);
|
|
prom_debug("opal align = 0x%x\n", align);
|
|
prom_debug("opal entry = 0x%x\n", entry);
|
|
prom_debug("opal size = 0x%x\n", (long)size);
|
|
|
|
prom_setprop(opal_node, "/ibm,opal", "opal-base-address",
|
|
&base, sizeof(base));
|
|
prom_setprop(opal_node, "/ibm,opal", "opal-entry-address",
|
|
&entry, sizeof(entry));
|
|
|
|
#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
|
|
prom_opal_base = base;
|
|
prom_opal_entry = entry;
|
|
#endif
|
|
prom_debug("prom_instantiate_opal: end...\n");
|
|
}
|
|
|
|
#endif /* CONFIG_PPC_POWERNV */
|
|
|
|
/*
|
|
* Allocate room for and instantiate RTAS
|
|
*/
|
|
static void __init prom_instantiate_rtas(void)
|
|
{
|
|
phandle rtas_node;
|
|
ihandle rtas_inst;
|
|
u32 base, entry = 0;
|
|
u32 size = 0;
|
|
|
|
prom_debug("prom_instantiate_rtas: start...\n");
|
|
|
|
rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
|
|
prom_debug("rtas_node: %x\n", rtas_node);
|
|
if (!PHANDLE_VALID(rtas_node))
|
|
return;
|
|
|
|
prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
|
|
if (size == 0)
|
|
return;
|
|
|
|
base = alloc_down(size, PAGE_SIZE, 0);
|
|
if (base == 0)
|
|
prom_panic("Could not allocate memory for RTAS\n");
|
|
|
|
rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
|
|
if (!IHANDLE_VALID(rtas_inst)) {
|
|
prom_printf("opening rtas package failed (%x)\n", rtas_inst);
|
|
return;
|
|
}
|
|
|
|
prom_printf("instantiating rtas at 0x%x...", base);
|
|
|
|
if (call_prom_ret("call-method", 3, 2, &entry,
|
|
ADDR("instantiate-rtas"),
|
|
rtas_inst, base) != 0
|
|
|| entry == 0) {
|
|
prom_printf(" failed\n");
|
|
return;
|
|
}
|
|
prom_printf(" done\n");
|
|
|
|
reserve_mem(base, size);
|
|
|
|
prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
|
|
&base, sizeof(base));
|
|
prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
|
|
&entry, sizeof(entry));
|
|
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
/* PowerVN takeover hack */
|
|
prom_rtas_data = base;
|
|
prom_rtas_entry = entry;
|
|
prom_getprop(rtas_node, "start-cpu", &prom_rtas_start_cpu, 4);
|
|
#endif
|
|
prom_debug("rtas base = 0x%x\n", base);
|
|
prom_debug("rtas entry = 0x%x\n", entry);
|
|
prom_debug("rtas size = 0x%x\n", (long)size);
|
|
|
|
prom_debug("prom_instantiate_rtas: end...\n");
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
|
/*
|
|
* Allocate room for and instantiate Stored Measurement Log (SML)
|
|
*/
|
|
static void __init prom_instantiate_sml(void)
|
|
{
|
|
phandle ibmvtpm_node;
|
|
ihandle ibmvtpm_inst;
|
|
u32 entry = 0, size = 0;
|
|
u64 base;
|
|
|
|
prom_debug("prom_instantiate_sml: start...\n");
|
|
|
|
ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/ibm,vtpm"));
|
|
prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
|
|
if (!PHANDLE_VALID(ibmvtpm_node))
|
|
return;
|
|
|
|
ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/ibm,vtpm"));
|
|
if (!IHANDLE_VALID(ibmvtpm_inst)) {
|
|
prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
|
|
return;
|
|
}
|
|
|
|
if (call_prom_ret("call-method", 2, 2, &size,
|
|
ADDR("sml-get-handover-size"),
|
|
ibmvtpm_inst) != 0 || size == 0) {
|
|
prom_printf("SML get handover size failed\n");
|
|
return;
|
|
}
|
|
|
|
base = alloc_down(size, PAGE_SIZE, 0);
|
|
if (base == 0)
|
|
prom_panic("Could not allocate memory for sml\n");
|
|
|
|
prom_printf("instantiating sml at 0x%x...", base);
|
|
|
|
if (call_prom_ret("call-method", 4, 2, &entry,
|
|
ADDR("sml-handover"),
|
|
ibmvtpm_inst, size, base) != 0 || entry == 0) {
|
|
prom_printf("SML handover failed\n");
|
|
return;
|
|
}
|
|
prom_printf(" done\n");
|
|
|
|
reserve_mem(base, size);
|
|
|
|
prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-base",
|
|
&base, sizeof(base));
|
|
prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-size",
|
|
&size, sizeof(size));
|
|
|
|
prom_debug("sml base = 0x%x\n", base);
|
|
prom_debug("sml size = 0x%x\n", (long)size);
|
|
|
|
prom_debug("prom_instantiate_sml: end...\n");
|
|
}
|
|
|
|
/*
|
|
* Allocate room for and initialize TCE tables
|
|
*/
|
|
static void __init prom_initialize_tce_table(void)
|
|
{
|
|
phandle node;
|
|
ihandle phb_node;
|
|
char compatible[64], type[64], model[64];
|
|
char *path = prom_scratch;
|
|
u64 base, align;
|
|
u32 minalign, minsize;
|
|
u64 tce_entry, *tce_entryp;
|
|
u64 local_alloc_top, local_alloc_bottom;
|
|
u64 i;
|
|
|
|
if (prom_iommu_off)
|
|
return;
|
|
|
|
prom_debug("starting prom_initialize_tce_table\n");
|
|
|
|
/* Cache current top of allocs so we reserve a single block */
|
|
local_alloc_top = alloc_top_high;
|
|
local_alloc_bottom = local_alloc_top;
|
|
|
|
/* Search all nodes looking for PHBs. */
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
compatible[0] = 0;
|
|
type[0] = 0;
|
|
model[0] = 0;
|
|
prom_getprop(node, "compatible",
|
|
compatible, sizeof(compatible));
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
prom_getprop(node, "model", model, sizeof(model));
|
|
|
|
if ((type[0] == 0) || (strstr(type, "pci") == NULL))
|
|
continue;
|
|
|
|
/* Keep the old logic intact to avoid regression. */
|
|
if (compatible[0] != 0) {
|
|
if ((strstr(compatible, "python") == NULL) &&
|
|
(strstr(compatible, "Speedwagon") == NULL) &&
|
|
(strstr(compatible, "Winnipeg") == NULL))
|
|
continue;
|
|
} else if (model[0] != 0) {
|
|
if ((strstr(model, "ython") == NULL) &&
|
|
(strstr(model, "peedwagon") == NULL) &&
|
|
(strstr(model, "innipeg") == NULL))
|
|
continue;
|
|
}
|
|
|
|
if (prom_getprop(node, "tce-table-minalign", &minalign,
|
|
sizeof(minalign)) == PROM_ERROR)
|
|
minalign = 0;
|
|
if (prom_getprop(node, "tce-table-minsize", &minsize,
|
|
sizeof(minsize)) == PROM_ERROR)
|
|
minsize = 4UL << 20;
|
|
|
|
/*
|
|
* Even though we read what OF wants, we just set the table
|
|
* size to 4 MB. This is enough to map 2GB of PCI DMA space.
|
|
* By doing this, we avoid the pitfalls of trying to DMA to
|
|
* MMIO space and the DMA alias hole.
|
|
*
|
|
* On POWER4, firmware sets the TCE region by assuming
|
|
* each TCE table is 8MB. Using this memory for anything
|
|
* else will impact performance, so we always allocate 8MB.
|
|
* Anton
|
|
*/
|
|
if (pvr_version_is(PVR_POWER4) || pvr_version_is(PVR_POWER4p))
|
|
minsize = 8UL << 20;
|
|
else
|
|
minsize = 4UL << 20;
|
|
|
|
/* Align to the greater of the align or size */
|
|
align = max(minalign, minsize);
|
|
base = alloc_down(minsize, align, 1);
|
|
if (base == 0)
|
|
prom_panic("ERROR, cannot find space for TCE table.\n");
|
|
if (base < local_alloc_bottom)
|
|
local_alloc_bottom = base;
|
|
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
|
/* Call OF to setup the TCE hardware */
|
|
if (call_prom("package-to-path", 3, 1, node,
|
|
path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
|
|
prom_printf("package-to-path failed\n");
|
|
}
|
|
|
|
/* Save away the TCE table attributes for later use. */
|
|
prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
|
|
prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
|
|
|
|
prom_debug("TCE table: %s\n", path);
|
|
prom_debug("\tnode = 0x%x\n", node);
|
|
prom_debug("\tbase = 0x%x\n", base);
|
|
prom_debug("\tsize = 0x%x\n", minsize);
|
|
|
|
/* Initialize the table to have a one-to-one mapping
|
|
* over the allocated size.
|
|
*/
|
|
tce_entryp = (u64 *)base;
|
|
for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
|
|
tce_entry = (i << PAGE_SHIFT);
|
|
tce_entry |= 0x3;
|
|
*tce_entryp = tce_entry;
|
|
}
|
|
|
|
prom_printf("opening PHB %s", path);
|
|
phb_node = call_prom("open", 1, 1, path);
|
|
if (phb_node == 0)
|
|
prom_printf("... failed\n");
|
|
else
|
|
prom_printf("... done\n");
|
|
|
|
call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
|
|
phb_node, -1, minsize,
|
|
(u32) base, (u32) (base >> 32));
|
|
call_prom("close", 1, 0, phb_node);
|
|
}
|
|
|
|
reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
|
|
|
|
/* These are only really needed if there is a memory limit in
|
|
* effect, but we don't know so export them always. */
|
|
prom_tce_alloc_start = local_alloc_bottom;
|
|
prom_tce_alloc_end = local_alloc_top;
|
|
|
|
/* Flag the first invalid entry */
|
|
prom_debug("ending prom_initialize_tce_table\n");
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* With CHRP SMP we need to use the OF to start the other processors.
|
|
* We can't wait until smp_boot_cpus (the OF is trashed by then)
|
|
* so we have to put the processors into a holding pattern controlled
|
|
* by the kernel (not OF) before we destroy the OF.
|
|
*
|
|
* This uses a chunk of low memory, puts some holding pattern
|
|
* code there and sends the other processors off to there until
|
|
* smp_boot_cpus tells them to do something. The holding pattern
|
|
* checks that address until its cpu # is there, when it is that
|
|
* cpu jumps to __secondary_start(). smp_boot_cpus() takes care
|
|
* of setting those values.
|
|
*
|
|
* We also use physical address 0x4 here to tell when a cpu
|
|
* is in its holding pattern code.
|
|
*
|
|
* -- Cort
|
|
*/
|
|
/*
|
|
* We want to reference the copy of __secondary_hold_* in the
|
|
* 0 - 0x100 address range
|
|
*/
|
|
#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
|
|
|
|
static void __init prom_hold_cpus(void)
|
|
{
|
|
unsigned long i;
|
|
unsigned int reg;
|
|
phandle node;
|
|
char type[64];
|
|
unsigned long *spinloop
|
|
= (void *) LOW_ADDR(__secondary_hold_spinloop);
|
|
unsigned long *acknowledge
|
|
= (void *) LOW_ADDR(__secondary_hold_acknowledge);
|
|
unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
|
|
|
|
prom_debug("prom_hold_cpus: start...\n");
|
|
prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
|
|
prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
|
|
prom_debug(" 1) acknowledge = 0x%x\n",
|
|
(unsigned long)acknowledge);
|
|
prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
|
|
prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
|
|
|
|
/* Set the common spinloop variable, so all of the secondary cpus
|
|
* will block when they are awakened from their OF spinloop.
|
|
* This must occur for both SMP and non SMP kernels, since OF will
|
|
* be trashed when we move the kernel.
|
|
*/
|
|
*spinloop = 0;
|
|
|
|
/* look for cpus */
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
type[0] = 0;
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
if (strcmp(type, "cpu") != 0)
|
|
continue;
|
|
|
|
/* Skip non-configured cpus. */
|
|
if (prom_getprop(node, "status", type, sizeof(type)) > 0)
|
|
if (strcmp(type, "okay") != 0)
|
|
continue;
|
|
|
|
reg = -1;
|
|
prom_getprop(node, "reg", ®, sizeof(reg));
|
|
|
|
prom_debug("cpu hw idx = %lu\n", reg);
|
|
|
|
/* Init the acknowledge var which will be reset by
|
|
* the secondary cpu when it awakens from its OF
|
|
* spinloop.
|
|
*/
|
|
*acknowledge = (unsigned long)-1;
|
|
|
|
if (reg != prom.cpu) {
|
|
/* Primary Thread of non-boot cpu or any thread */
|
|
prom_printf("starting cpu hw idx %lu... ", reg);
|
|
call_prom("start-cpu", 3, 0, node,
|
|
secondary_hold, reg);
|
|
|
|
for (i = 0; (i < 100000000) &&
|
|
(*acknowledge == ((unsigned long)-1)); i++ )
|
|
mb();
|
|
|
|
if (*acknowledge == reg)
|
|
prom_printf("done\n");
|
|
else
|
|
prom_printf("failed: %x\n", *acknowledge);
|
|
}
|
|
#ifdef CONFIG_SMP
|
|
else
|
|
prom_printf("boot cpu hw idx %lu\n", reg);
|
|
#endif /* CONFIG_SMP */
|
|
}
|
|
|
|
prom_debug("prom_hold_cpus: end...\n");
|
|
}
|
|
|
|
|
|
static void __init prom_init_client_services(unsigned long pp)
|
|
{
|
|
/* Get a handle to the prom entry point before anything else */
|
|
prom_entry = pp;
|
|
|
|
/* get a handle for the stdout device */
|
|
prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
|
|
if (!PHANDLE_VALID(prom.chosen))
|
|
prom_panic("cannot find chosen"); /* msg won't be printed :( */
|
|
|
|
/* get device tree root */
|
|
prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
|
|
if (!PHANDLE_VALID(prom.root))
|
|
prom_panic("cannot find device tree root"); /* msg won't be printed :( */
|
|
|
|
prom.mmumap = 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PPC32
|
|
/*
|
|
* For really old powermacs, we need to map things we claim.
|
|
* For that, we need the ihandle of the mmu.
|
|
* Also, on the longtrail, we need to work around other bugs.
|
|
*/
|
|
static void __init prom_find_mmu(void)
|
|
{
|
|
phandle oprom;
|
|
char version[64];
|
|
|
|
oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
|
|
if (!PHANDLE_VALID(oprom))
|
|
return;
|
|
if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
|
|
return;
|
|
version[sizeof(version) - 1] = 0;
|
|
/* XXX might need to add other versions here */
|
|
if (strcmp(version, "Open Firmware, 1.0.5") == 0)
|
|
of_workarounds = OF_WA_CLAIM;
|
|
else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
|
|
of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
|
|
call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
|
|
} else
|
|
return;
|
|
prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
|
|
prom_getprop(prom.chosen, "mmu", &prom.mmumap,
|
|
sizeof(prom.mmumap));
|
|
if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
|
|
of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
|
|
}
|
|
#else
|
|
#define prom_find_mmu()
|
|
#endif
|
|
|
|
static void __init prom_init_stdout(void)
|
|
{
|
|
char *path = of_stdout_device;
|
|
char type[16];
|
|
u32 val;
|
|
|
|
if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
|
|
prom_panic("cannot find stdout");
|
|
|
|
prom.stdout = val;
|
|
|
|
/* Get the full OF pathname of the stdout device */
|
|
memset(path, 0, 256);
|
|
call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
|
|
val = call_prom("instance-to-package", 1, 1, prom.stdout);
|
|
prom_setprop(prom.chosen, "/chosen", "linux,stdout-package",
|
|
&val, sizeof(val));
|
|
prom_printf("OF stdout device is: %s\n", of_stdout_device);
|
|
prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
|
|
path, strlen(path) + 1);
|
|
|
|
/* If it's a display, note it */
|
|
memset(type, 0, sizeof(type));
|
|
prom_getprop(val, "device_type", type, sizeof(type));
|
|
if (strcmp(type, "display") == 0)
|
|
prom_setprop(val, path, "linux,boot-display", NULL, 0);
|
|
}
|
|
|
|
static int __init prom_find_machine_type(void)
|
|
{
|
|
char compat[256];
|
|
int len, i = 0;
|
|
#ifdef CONFIG_PPC64
|
|
phandle rtas;
|
|
int x;
|
|
#endif
|
|
|
|
/* Look for a PowerMac or a Cell */
|
|
len = prom_getprop(prom.root, "compatible",
|
|
compat, sizeof(compat)-1);
|
|
if (len > 0) {
|
|
compat[len] = 0;
|
|
while (i < len) {
|
|
char *p = &compat[i];
|
|
int sl = strlen(p);
|
|
if (sl == 0)
|
|
break;
|
|
if (strstr(p, "Power Macintosh") ||
|
|
strstr(p, "MacRISC"))
|
|
return PLATFORM_POWERMAC;
|
|
#ifdef CONFIG_PPC64
|
|
/* We must make sure we don't detect the IBM Cell
|
|
* blades as pSeries due to some firmware issues,
|
|
* so we do it here.
|
|
*/
|
|
if (strstr(p, "IBM,CBEA") ||
|
|
strstr(p, "IBM,CPBW-1.0"))
|
|
return PLATFORM_GENERIC;
|
|
#endif /* CONFIG_PPC64 */
|
|
i += sl + 1;
|
|
}
|
|
}
|
|
#ifdef CONFIG_PPC64
|
|
/* Try to detect OPAL */
|
|
if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal"))))
|
|
return PLATFORM_OPAL;
|
|
|
|
/* Try to figure out if it's an IBM pSeries or any other
|
|
* PAPR compliant platform. We assume it is if :
|
|
* - /device_type is "chrp" (please, do NOT use that for future
|
|
* non-IBM designs !
|
|
* - it has /rtas
|
|
*/
|
|
len = prom_getprop(prom.root, "device_type",
|
|
compat, sizeof(compat)-1);
|
|
if (len <= 0)
|
|
return PLATFORM_GENERIC;
|
|
if (strcmp(compat, "chrp"))
|
|
return PLATFORM_GENERIC;
|
|
|
|
/* Default to pSeries. We need to know if we are running LPAR */
|
|
rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
|
|
if (!PHANDLE_VALID(rtas))
|
|
return PLATFORM_GENERIC;
|
|
x = prom_getproplen(rtas, "ibm,hypertas-functions");
|
|
if (x != PROM_ERROR) {
|
|
prom_debug("Hypertas detected, assuming LPAR !\n");
|
|
return PLATFORM_PSERIES_LPAR;
|
|
}
|
|
return PLATFORM_PSERIES;
|
|
#else
|
|
return PLATFORM_GENERIC;
|
|
#endif
|
|
}
|
|
|
|
static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
|
|
{
|
|
return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
|
|
}
|
|
|
|
/*
|
|
* If we have a display that we don't know how to drive,
|
|
* we will want to try to execute OF's open method for it
|
|
* later. However, OF will probably fall over if we do that
|
|
* we've taken over the MMU.
|
|
* So we check whether we will need to open the display,
|
|
* and if so, open it now.
|
|
*/
|
|
static void __init prom_check_displays(void)
|
|
{
|
|
char type[16], *path;
|
|
phandle node;
|
|
ihandle ih;
|
|
int i;
|
|
|
|
static unsigned char default_colors[] = {
|
|
0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0xaa,
|
|
0x00, 0xaa, 0x00,
|
|
0x00, 0xaa, 0xaa,
|
|
0xaa, 0x00, 0x00,
|
|
0xaa, 0x00, 0xaa,
|
|
0xaa, 0xaa, 0x00,
|
|
0xaa, 0xaa, 0xaa,
|
|
0x55, 0x55, 0x55,
|
|
0x55, 0x55, 0xff,
|
|
0x55, 0xff, 0x55,
|
|
0x55, 0xff, 0xff,
|
|
0xff, 0x55, 0x55,
|
|
0xff, 0x55, 0xff,
|
|
0xff, 0xff, 0x55,
|
|
0xff, 0xff, 0xff
|
|
};
|
|
const unsigned char *clut;
|
|
|
|
prom_debug("Looking for displays\n");
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
memset(type, 0, sizeof(type));
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
if (strcmp(type, "display") != 0)
|
|
continue;
|
|
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
|
path = prom_scratch;
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
|
|
|
/*
|
|
* leave some room at the end of the path for appending extra
|
|
* arguments
|
|
*/
|
|
if (call_prom("package-to-path", 3, 1, node, path,
|
|
PROM_SCRATCH_SIZE-10) == PROM_ERROR)
|
|
continue;
|
|
prom_printf("found display : %s, opening... ", path);
|
|
|
|
ih = call_prom("open", 1, 1, path);
|
|
if (ih == 0) {
|
|
prom_printf("failed\n");
|
|
continue;
|
|
}
|
|
|
|
/* Success */
|
|
prom_printf("done\n");
|
|
prom_setprop(node, path, "linux,opened", NULL, 0);
|
|
|
|
/* Setup a usable color table when the appropriate
|
|
* method is available. Should update this to set-colors */
|
|
clut = default_colors;
|
|
for (i = 0; i < 16; i++, clut += 3)
|
|
if (prom_set_color(ih, i, clut[0], clut[1],
|
|
clut[2]) != 0)
|
|
break;
|
|
|
|
#ifdef CONFIG_LOGO_LINUX_CLUT224
|
|
clut = PTRRELOC(logo_linux_clut224.clut);
|
|
for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
|
|
if (prom_set_color(ih, i + 32, clut[0], clut[1],
|
|
clut[2]) != 0)
|
|
break;
|
|
#endif /* CONFIG_LOGO_LINUX_CLUT224 */
|
|
}
|
|
}
|
|
|
|
|
|
/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
|
|
static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
|
|
unsigned long needed, unsigned long align)
|
|
{
|
|
void *ret;
|
|
|
|
*mem_start = _ALIGN(*mem_start, align);
|
|
while ((*mem_start + needed) > *mem_end) {
|
|
unsigned long room, chunk;
|
|
|
|
prom_debug("Chunk exhausted, claiming more at %x...\n",
|
|
alloc_bottom);
|
|
room = alloc_top - alloc_bottom;
|
|
if (room > DEVTREE_CHUNK_SIZE)
|
|
room = DEVTREE_CHUNK_SIZE;
|
|
if (room < PAGE_SIZE)
|
|
prom_panic("No memory for flatten_device_tree "
|
|
"(no room)\n");
|
|
chunk = alloc_up(room, 0);
|
|
if (chunk == 0)
|
|
prom_panic("No memory for flatten_device_tree "
|
|
"(claim failed)\n");
|
|
*mem_end = chunk + room;
|
|
}
|
|
|
|
ret = (void *)*mem_start;
|
|
*mem_start += needed;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define dt_push_token(token, mem_start, mem_end) \
|
|
do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
|
|
|
|
static unsigned long __init dt_find_string(char *str)
|
|
{
|
|
char *s, *os;
|
|
|
|
s = os = (char *)dt_string_start;
|
|
s += 4;
|
|
while (s < (char *)dt_string_end) {
|
|
if (strcmp(s, str) == 0)
|
|
return s - os;
|
|
s += strlen(s) + 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The Open Firmware 1275 specification states properties must be 31 bytes or
|
|
* less, however not all firmwares obey this. Make it 64 bytes to be safe.
|
|
*/
|
|
#define MAX_PROPERTY_NAME 64
|
|
|
|
static void __init scan_dt_build_strings(phandle node,
|
|
unsigned long *mem_start,
|
|
unsigned long *mem_end)
|
|
{
|
|
char *prev_name, *namep, *sstart;
|
|
unsigned long soff;
|
|
phandle child;
|
|
|
|
sstart = (char *)dt_string_start;
|
|
|
|
/* get and store all property names */
|
|
prev_name = "";
|
|
for (;;) {
|
|
/* 64 is max len of name including nul. */
|
|
namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
|
|
if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
|
|
/* No more nodes: unwind alloc */
|
|
*mem_start = (unsigned long)namep;
|
|
break;
|
|
}
|
|
|
|
/* skip "name" */
|
|
if (strcmp(namep, "name") == 0) {
|
|
*mem_start = (unsigned long)namep;
|
|
prev_name = "name";
|
|
continue;
|
|
}
|
|
/* get/create string entry */
|
|
soff = dt_find_string(namep);
|
|
if (soff != 0) {
|
|
*mem_start = (unsigned long)namep;
|
|
namep = sstart + soff;
|
|
} else {
|
|
/* Trim off some if we can */
|
|
*mem_start = (unsigned long)namep + strlen(namep) + 1;
|
|
dt_string_end = *mem_start;
|
|
}
|
|
prev_name = namep;
|
|
}
|
|
|
|
/* do all our children */
|
|
child = call_prom("child", 1, 1, node);
|
|
while (child != 0) {
|
|
scan_dt_build_strings(child, mem_start, mem_end);
|
|
child = call_prom("peer", 1, 1, child);
|
|
}
|
|
}
|
|
|
|
static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
|
|
unsigned long *mem_end)
|
|
{
|
|
phandle child;
|
|
char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
|
|
unsigned long soff;
|
|
unsigned char *valp;
|
|
static char pname[MAX_PROPERTY_NAME];
|
|
int l, room, has_phandle = 0;
|
|
|
|
dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
|
|
|
|
/* get the node's full name */
|
|
namep = (char *)*mem_start;
|
|
room = *mem_end - *mem_start;
|
|
if (room > 255)
|
|
room = 255;
|
|
l = call_prom("package-to-path", 3, 1, node, namep, room);
|
|
if (l >= 0) {
|
|
/* Didn't fit? Get more room. */
|
|
if (l >= room) {
|
|
if (l >= *mem_end - *mem_start)
|
|
namep = make_room(mem_start, mem_end, l+1, 1);
|
|
call_prom("package-to-path", 3, 1, node, namep, l);
|
|
}
|
|
namep[l] = '\0';
|
|
|
|
/* Fixup an Apple bug where they have bogus \0 chars in the
|
|
* middle of the path in some properties, and extract
|
|
* the unit name (everything after the last '/').
|
|
*/
|
|
for (lp = p = namep, ep = namep + l; p < ep; p++) {
|
|
if (*p == '/')
|
|
lp = namep;
|
|
else if (*p != 0)
|
|
*lp++ = *p;
|
|
}
|
|
*lp = 0;
|
|
*mem_start = _ALIGN((unsigned long)lp + 1, 4);
|
|
}
|
|
|
|
/* get it again for debugging */
|
|
path = prom_scratch;
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
|
call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
|
|
|
|
/* get and store all properties */
|
|
prev_name = "";
|
|
sstart = (char *)dt_string_start;
|
|
for (;;) {
|
|
if (call_prom("nextprop", 3, 1, node, prev_name,
|
|
pname) != 1)
|
|
break;
|
|
|
|
/* skip "name" */
|
|
if (strcmp(pname, "name") == 0) {
|
|
prev_name = "name";
|
|
continue;
|
|
}
|
|
|
|
/* find string offset */
|
|
soff = dt_find_string(pname);
|
|
if (soff == 0) {
|
|
prom_printf("WARNING: Can't find string index for"
|
|
" <%s>, node %s\n", pname, path);
|
|
break;
|
|
}
|
|
prev_name = sstart + soff;
|
|
|
|
/* get length */
|
|
l = call_prom("getproplen", 2, 1, node, pname);
|
|
|
|
/* sanity checks */
|
|
if (l == PROM_ERROR)
|
|
continue;
|
|
|
|
/* push property head */
|
|
dt_push_token(OF_DT_PROP, mem_start, mem_end);
|
|
dt_push_token(l, mem_start, mem_end);
|
|
dt_push_token(soff, mem_start, mem_end);
|
|
|
|
/* push property content */
|
|
valp = make_room(mem_start, mem_end, l, 4);
|
|
call_prom("getprop", 4, 1, node, pname, valp, l);
|
|
*mem_start = _ALIGN(*mem_start, 4);
|
|
|
|
if (!strcmp(pname, "phandle"))
|
|
has_phandle = 1;
|
|
}
|
|
|
|
/* Add a "linux,phandle" property if no "phandle" property already
|
|
* existed (can happen with OPAL)
|
|
*/
|
|
if (!has_phandle) {
|
|
soff = dt_find_string("linux,phandle");
|
|
if (soff == 0)
|
|
prom_printf("WARNING: Can't find string index for"
|
|
" <linux-phandle> node %s\n", path);
|
|
else {
|
|
dt_push_token(OF_DT_PROP, mem_start, mem_end);
|
|
dt_push_token(4, mem_start, mem_end);
|
|
dt_push_token(soff, mem_start, mem_end);
|
|
valp = make_room(mem_start, mem_end, 4, 4);
|
|
*(u32 *)valp = node;
|
|
}
|
|
}
|
|
|
|
/* do all our children */
|
|
child = call_prom("child", 1, 1, node);
|
|
while (child != 0) {
|
|
scan_dt_build_struct(child, mem_start, mem_end);
|
|
child = call_prom("peer", 1, 1, child);
|
|
}
|
|
|
|
dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
|
|
}
|
|
|
|
static void __init flatten_device_tree(void)
|
|
{
|
|
phandle root;
|
|
unsigned long mem_start, mem_end, room;
|
|
struct boot_param_header *hdr;
|
|
char *namep;
|
|
u64 *rsvmap;
|
|
|
|
/*
|
|
* Check how much room we have between alloc top & bottom (+/- a
|
|
* few pages), crop to 1MB, as this is our "chunk" size
|
|
*/
|
|
room = alloc_top - alloc_bottom - 0x4000;
|
|
if (room > DEVTREE_CHUNK_SIZE)
|
|
room = DEVTREE_CHUNK_SIZE;
|
|
prom_debug("starting device tree allocs at %x\n", alloc_bottom);
|
|
|
|
/* Now try to claim that */
|
|
mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
|
|
if (mem_start == 0)
|
|
prom_panic("Can't allocate initial device-tree chunk\n");
|
|
mem_end = mem_start + room;
|
|
|
|
/* Get root of tree */
|
|
root = call_prom("peer", 1, 1, (phandle)0);
|
|
if (root == (phandle)0)
|
|
prom_panic ("couldn't get device tree root\n");
|
|
|
|
/* Build header and make room for mem rsv map */
|
|
mem_start = _ALIGN(mem_start, 4);
|
|
hdr = make_room(&mem_start, &mem_end,
|
|
sizeof(struct boot_param_header), 4);
|
|
dt_header_start = (unsigned long)hdr;
|
|
rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
|
|
|
|
/* Start of strings */
|
|
mem_start = PAGE_ALIGN(mem_start);
|
|
dt_string_start = mem_start;
|
|
mem_start += 4; /* hole */
|
|
|
|
/* Add "linux,phandle" in there, we'll need it */
|
|
namep = make_room(&mem_start, &mem_end, 16, 1);
|
|
strcpy(namep, "linux,phandle");
|
|
mem_start = (unsigned long)namep + strlen(namep) + 1;
|
|
|
|
/* Build string array */
|
|
prom_printf("Building dt strings...\n");
|
|
scan_dt_build_strings(root, &mem_start, &mem_end);
|
|
dt_string_end = mem_start;
|
|
|
|
/* Build structure */
|
|
mem_start = PAGE_ALIGN(mem_start);
|
|
dt_struct_start = mem_start;
|
|
prom_printf("Building dt structure...\n");
|
|
scan_dt_build_struct(root, &mem_start, &mem_end);
|
|
dt_push_token(OF_DT_END, &mem_start, &mem_end);
|
|
dt_struct_end = PAGE_ALIGN(mem_start);
|
|
|
|
/* Finish header */
|
|
hdr->boot_cpuid_phys = prom.cpu;
|
|
hdr->magic = OF_DT_HEADER;
|
|
hdr->totalsize = dt_struct_end - dt_header_start;
|
|
hdr->off_dt_struct = dt_struct_start - dt_header_start;
|
|
hdr->off_dt_strings = dt_string_start - dt_header_start;
|
|
hdr->dt_strings_size = dt_string_end - dt_string_start;
|
|
hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - dt_header_start;
|
|
hdr->version = OF_DT_VERSION;
|
|
/* Version 16 is not backward compatible */
|
|
hdr->last_comp_version = 0x10;
|
|
|
|
/* Copy the reserve map in */
|
|
memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
|
|
|
|
#ifdef DEBUG_PROM
|
|
{
|
|
int i;
|
|
prom_printf("reserved memory map:\n");
|
|
for (i = 0; i < mem_reserve_cnt; i++)
|
|
prom_printf(" %x - %x\n",
|
|
mem_reserve_map[i].base,
|
|
mem_reserve_map[i].size);
|
|
}
|
|
#endif
|
|
/* Bump mem_reserve_cnt to cause further reservations to fail
|
|
* since it's too late.
|
|
*/
|
|
mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
|
|
|
|
prom_printf("Device tree strings 0x%x -> 0x%x\n",
|
|
dt_string_start, dt_string_end);
|
|
prom_printf("Device tree struct 0x%x -> 0x%x\n",
|
|
dt_struct_start, dt_struct_end);
|
|
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_MAPLE
|
|
/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
|
|
* The values are bad, and it doesn't even have the right number of cells. */
|
|
static void __init fixup_device_tree_maple(void)
|
|
{
|
|
phandle isa;
|
|
u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
|
|
u32 isa_ranges[6];
|
|
char *name;
|
|
|
|
name = "/ht@0/isa@4";
|
|
isa = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (!PHANDLE_VALID(isa)) {
|
|
name = "/ht@0/isa@6";
|
|
isa = call_prom("finddevice", 1, 1, ADDR(name));
|
|
rloc = 0x01003000; /* IO space; PCI device = 6 */
|
|
}
|
|
if (!PHANDLE_VALID(isa))
|
|
return;
|
|
|
|
if (prom_getproplen(isa, "ranges") != 12)
|
|
return;
|
|
if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
|
|
== PROM_ERROR)
|
|
return;
|
|
|
|
if (isa_ranges[0] != 0x1 ||
|
|
isa_ranges[1] != 0xf4000000 ||
|
|
isa_ranges[2] != 0x00010000)
|
|
return;
|
|
|
|
prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
|
|
|
|
isa_ranges[0] = 0x1;
|
|
isa_ranges[1] = 0x0;
|
|
isa_ranges[2] = rloc;
|
|
isa_ranges[3] = 0x0;
|
|
isa_ranges[4] = 0x0;
|
|
isa_ranges[5] = 0x00010000;
|
|
prom_setprop(isa, name, "ranges",
|
|
isa_ranges, sizeof(isa_ranges));
|
|
}
|
|
|
|
#define CPC925_MC_START 0xf8000000
|
|
#define CPC925_MC_LENGTH 0x1000000
|
|
/* The values for memory-controller don't have right number of cells */
|
|
static void __init fixup_device_tree_maple_memory_controller(void)
|
|
{
|
|
phandle mc;
|
|
u32 mc_reg[4];
|
|
char *name = "/hostbridge@f8000000";
|
|
u32 ac, sc;
|
|
|
|
mc = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (!PHANDLE_VALID(mc))
|
|
return;
|
|
|
|
if (prom_getproplen(mc, "reg") != 8)
|
|
return;
|
|
|
|
prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
|
|
prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
|
|
if ((ac != 2) || (sc != 2))
|
|
return;
|
|
|
|
if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
|
|
return;
|
|
|
|
if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
|
|
return;
|
|
|
|
prom_printf("Fixing up bogus hostbridge on Maple...\n");
|
|
|
|
mc_reg[0] = 0x0;
|
|
mc_reg[1] = CPC925_MC_START;
|
|
mc_reg[2] = 0x0;
|
|
mc_reg[3] = CPC925_MC_LENGTH;
|
|
prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
|
|
}
|
|
#else
|
|
#define fixup_device_tree_maple()
|
|
#define fixup_device_tree_maple_memory_controller()
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_CHRP
|
|
/*
|
|
* Pegasos and BriQ lacks the "ranges" property in the isa node
|
|
* Pegasos needs decimal IRQ 14/15, not hexadecimal
|
|
* Pegasos has the IDE configured in legacy mode, but advertised as native
|
|
*/
|
|
static void __init fixup_device_tree_chrp(void)
|
|
{
|
|
phandle ph;
|
|
u32 prop[6];
|
|
u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
|
|
char *name;
|
|
int rc;
|
|
|
|
name = "/pci@80000000/isa@c";
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (!PHANDLE_VALID(ph)) {
|
|
name = "/pci@ff500000/isa@6";
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
|
rloc = 0x01003000; /* IO space; PCI device = 6 */
|
|
}
|
|
if (PHANDLE_VALID(ph)) {
|
|
rc = prom_getproplen(ph, "ranges");
|
|
if (rc == 0 || rc == PROM_ERROR) {
|
|
prom_printf("Fixing up missing ISA range on Pegasos...\n");
|
|
|
|
prop[0] = 0x1;
|
|
prop[1] = 0x0;
|
|
prop[2] = rloc;
|
|
prop[3] = 0x0;
|
|
prop[4] = 0x0;
|
|
prop[5] = 0x00010000;
|
|
prom_setprop(ph, name, "ranges", prop, sizeof(prop));
|
|
}
|
|
}
|
|
|
|
name = "/pci@80000000/ide@C,1";
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (PHANDLE_VALID(ph)) {
|
|
prom_printf("Fixing up IDE interrupt on Pegasos...\n");
|
|
prop[0] = 14;
|
|
prop[1] = 0x0;
|
|
prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
|
|
prom_printf("Fixing up IDE class-code on Pegasos...\n");
|
|
rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
|
|
if (rc == sizeof(u32)) {
|
|
prop[0] &= ~0x5;
|
|
prom_setprop(ph, name, "class-code", prop, sizeof(u32));
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
#define fixup_device_tree_chrp()
|
|
#endif
|
|
|
|
#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
|
|
static void __init fixup_device_tree_pmac(void)
|
|
{
|
|
phandle u3, i2c, mpic;
|
|
u32 u3_rev;
|
|
u32 interrupts[2];
|
|
u32 parent;
|
|
|
|
/* Some G5s have a missing interrupt definition, fix it up here */
|
|
u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
|
|
if (!PHANDLE_VALID(u3))
|
|
return;
|
|
i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
|
|
if (!PHANDLE_VALID(i2c))
|
|
return;
|
|
mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
|
|
if (!PHANDLE_VALID(mpic))
|
|
return;
|
|
|
|
/* check if proper rev of u3 */
|
|
if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
|
|
== PROM_ERROR)
|
|
return;
|
|
if (u3_rev < 0x35 || u3_rev > 0x39)
|
|
return;
|
|
/* does it need fixup ? */
|
|
if (prom_getproplen(i2c, "interrupts") > 0)
|
|
return;
|
|
|
|
prom_printf("fixing up bogus interrupts for u3 i2c...\n");
|
|
|
|
/* interrupt on this revision of u3 is number 0 and level */
|
|
interrupts[0] = 0;
|
|
interrupts[1] = 1;
|
|
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
|
|
&interrupts, sizeof(interrupts));
|
|
parent = (u32)mpic;
|
|
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
|
|
&parent, sizeof(parent));
|
|
}
|
|
#else
|
|
#define fixup_device_tree_pmac()
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_EFIKA
|
|
/*
|
|
* The MPC5200 FEC driver requires an phy-handle property to tell it how
|
|
* to talk to the phy. If the phy-handle property is missing, then this
|
|
* function is called to add the appropriate nodes and link it to the
|
|
* ethernet node.
|
|
*/
|
|
static void __init fixup_device_tree_efika_add_phy(void)
|
|
{
|
|
u32 node;
|
|
char prop[64];
|
|
int rv;
|
|
|
|
/* Check if /builtin/ethernet exists - bail if it doesn't */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
|
|
if (!PHANDLE_VALID(node))
|
|
return;
|
|
|
|
/* Check if the phy-handle property exists - bail if it does */
|
|
rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
|
|
if (!rv)
|
|
return;
|
|
|
|
/*
|
|
* At this point the ethernet device doesn't have a phy described.
|
|
* Now we need to add the missing phy node and linkage
|
|
*/
|
|
|
|
/* Check for an MDIO bus node - if missing then create one */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
|
|
if (!PHANDLE_VALID(node)) {
|
|
prom_printf("Adding Ethernet MDIO node\n");
|
|
call_prom("interpret", 1, 1,
|
|
" s\" /builtin\" find-device"
|
|
" new-device"
|
|
" 1 encode-int s\" #address-cells\" property"
|
|
" 0 encode-int s\" #size-cells\" property"
|
|
" s\" mdio\" device-name"
|
|
" s\" fsl,mpc5200b-mdio\" encode-string"
|
|
" s\" compatible\" property"
|
|
" 0xf0003000 0x400 reg"
|
|
" 0x2 encode-int"
|
|
" 0x5 encode-int encode+"
|
|
" 0x3 encode-int encode+"
|
|
" s\" interrupts\" property"
|
|
" finish-device");
|
|
};
|
|
|
|
/* Check for a PHY device node - if missing then create one and
|
|
* give it's phandle to the ethernet node */
|
|
node = call_prom("finddevice", 1, 1,
|
|
ADDR("/builtin/mdio/ethernet-phy"));
|
|
if (!PHANDLE_VALID(node)) {
|
|
prom_printf("Adding Ethernet PHY node\n");
|
|
call_prom("interpret", 1, 1,
|
|
" s\" /builtin/mdio\" find-device"
|
|
" new-device"
|
|
" s\" ethernet-phy\" device-name"
|
|
" 0x10 encode-int s\" reg\" property"
|
|
" my-self"
|
|
" ihandle>phandle"
|
|
" finish-device"
|
|
" s\" /builtin/ethernet\" find-device"
|
|
" encode-int"
|
|
" s\" phy-handle\" property"
|
|
" device-end");
|
|
}
|
|
}
|
|
|
|
static void __init fixup_device_tree_efika(void)
|
|
{
|
|
int sound_irq[3] = { 2, 2, 0 };
|
|
int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
|
|
3,4,0, 3,5,0, 3,6,0, 3,7,0,
|
|
3,8,0, 3,9,0, 3,10,0, 3,11,0,
|
|
3,12,0, 3,13,0, 3,14,0, 3,15,0 };
|
|
u32 node;
|
|
char prop[64];
|
|
int rv, len;
|
|
|
|
/* Check if we're really running on a EFIKA */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/"));
|
|
if (!PHANDLE_VALID(node))
|
|
return;
|
|
|
|
rv = prom_getprop(node, "model", prop, sizeof(prop));
|
|
if (rv == PROM_ERROR)
|
|
return;
|
|
if (strcmp(prop, "EFIKA5K2"))
|
|
return;
|
|
|
|
prom_printf("Applying EFIKA device tree fixups\n");
|
|
|
|
/* Claiming to be 'chrp' is death */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/"));
|
|
rv = prom_getprop(node, "device_type", prop, sizeof(prop));
|
|
if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
|
|
prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
|
|
|
|
/* CODEGEN,description is exposed in /proc/cpuinfo so
|
|
fix that too */
|
|
rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
|
|
if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
|
|
prom_setprop(node, "/", "CODEGEN,description",
|
|
"Efika 5200B PowerPC System",
|
|
sizeof("Efika 5200B PowerPC System"));
|
|
|
|
/* Fixup bestcomm interrupts property */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
|
|
if (PHANDLE_VALID(node)) {
|
|
len = prom_getproplen(node, "interrupts");
|
|
if (len == 12) {
|
|
prom_printf("Fixing bestcomm interrupts property\n");
|
|
prom_setprop(node, "/builtin/bestcom", "interrupts",
|
|
bcomm_irq, sizeof(bcomm_irq));
|
|
}
|
|
}
|
|
|
|
/* Fixup sound interrupts property */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
|
|
if (PHANDLE_VALID(node)) {
|
|
rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
|
|
if (rv == PROM_ERROR) {
|
|
prom_printf("Adding sound interrupts property\n");
|
|
prom_setprop(node, "/builtin/sound", "interrupts",
|
|
sound_irq, sizeof(sound_irq));
|
|
}
|
|
}
|
|
|
|
/* Make sure ethernet phy-handle property exists */
|
|
fixup_device_tree_efika_add_phy();
|
|
}
|
|
#else
|
|
#define fixup_device_tree_efika()
|
|
#endif
|
|
|
|
static void __init fixup_device_tree(void)
|
|
{
|
|
fixup_device_tree_maple();
|
|
fixup_device_tree_maple_memory_controller();
|
|
fixup_device_tree_chrp();
|
|
fixup_device_tree_pmac();
|
|
fixup_device_tree_efika();
|
|
}
|
|
|
|
static void __init prom_find_boot_cpu(void)
|
|
{
|
|
u32 getprop_rval;
|
|
ihandle prom_cpu;
|
|
phandle cpu_pkg;
|
|
|
|
prom.cpu = 0;
|
|
if (prom_getprop(prom.chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
|
|
return;
|
|
|
|
cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
|
|
|
|
prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
|
|
prom.cpu = getprop_rval;
|
|
|
|
prom_debug("Booting CPU hw index = %lu\n", prom.cpu);
|
|
}
|
|
|
|
static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
|
|
{
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
if (r3 && r4 && r4 != 0xdeadbeef) {
|
|
unsigned long val;
|
|
|
|
prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
|
|
prom_initrd_end = prom_initrd_start + r4;
|
|
|
|
val = prom_initrd_start;
|
|
prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
|
|
&val, sizeof(val));
|
|
val = prom_initrd_end;
|
|
prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
|
|
&val, sizeof(val));
|
|
|
|
reserve_mem(prom_initrd_start,
|
|
prom_initrd_end - prom_initrd_start);
|
|
|
|
prom_debug("initrd_start=0x%x\n", prom_initrd_start);
|
|
prom_debug("initrd_end=0x%x\n", prom_initrd_end);
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_INITRD */
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#ifdef CONFIG_RELOCATABLE
|
|
static void reloc_toc(void)
|
|
{
|
|
}
|
|
|
|
static void unreloc_toc(void)
|
|
{
|
|
}
|
|
#else
|
|
static void __reloc_toc(void *tocstart, unsigned long offset,
|
|
unsigned long nr_entries)
|
|
{
|
|
unsigned long i;
|
|
unsigned long *toc_entry = (unsigned long *)tocstart;
|
|
|
|
for (i = 0; i < nr_entries; i++) {
|
|
*toc_entry = *toc_entry + offset;
|
|
toc_entry++;
|
|
}
|
|
}
|
|
|
|
static void reloc_toc(void)
|
|
{
|
|
unsigned long offset = reloc_offset();
|
|
unsigned long nr_entries =
|
|
(__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
|
|
|
|
/* Need to add offset to get at __prom_init_toc_start */
|
|
__reloc_toc(__prom_init_toc_start + offset, offset, nr_entries);
|
|
|
|
mb();
|
|
}
|
|
|
|
static void unreloc_toc(void)
|
|
{
|
|
unsigned long offset = reloc_offset();
|
|
unsigned long nr_entries =
|
|
(__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
|
|
|
|
mb();
|
|
|
|
/* __prom_init_toc_start has been relocated, no need to add offset */
|
|
__reloc_toc(__prom_init_toc_start, -offset, nr_entries);
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
* We enter here early on, when the Open Firmware prom is still
|
|
* handling exceptions and the MMU hash table for us.
|
|
*/
|
|
|
|
unsigned long __init prom_init(unsigned long r3, unsigned long r4,
|
|
unsigned long pp,
|
|
unsigned long r6, unsigned long r7,
|
|
unsigned long kbase)
|
|
{
|
|
unsigned long hdr;
|
|
|
|
#ifdef CONFIG_PPC32
|
|
unsigned long offset = reloc_offset();
|
|
reloc_got2(offset);
|
|
#else
|
|
reloc_toc();
|
|
#endif
|
|
|
|
/*
|
|
* First zero the BSS
|
|
*/
|
|
memset(&__bss_start, 0, __bss_stop - __bss_start);
|
|
|
|
/*
|
|
* Init interface to Open Firmware, get some node references,
|
|
* like /chosen
|
|
*/
|
|
prom_init_client_services(pp);
|
|
|
|
/*
|
|
* See if this OF is old enough that we need to do explicit maps
|
|
* and other workarounds
|
|
*/
|
|
prom_find_mmu();
|
|
|
|
/*
|
|
* Init prom stdout device
|
|
*/
|
|
prom_init_stdout();
|
|
|
|
prom_printf("Preparing to boot %s", linux_banner);
|
|
|
|
/*
|
|
* Get default machine type. At this point, we do not differentiate
|
|
* between pSeries SMP and pSeries LPAR
|
|
*/
|
|
of_platform = prom_find_machine_type();
|
|
prom_printf("Detected machine type: %x\n", of_platform);
|
|
|
|
#ifndef CONFIG_NONSTATIC_KERNEL
|
|
/* Bail if this is a kdump kernel. */
|
|
if (PHYSICAL_START > 0)
|
|
prom_panic("Error: You can't boot a kdump kernel from OF!\n");
|
|
#endif
|
|
|
|
/*
|
|
* Check for an initrd
|
|
*/
|
|
prom_check_initrd(r3, r4);
|
|
|
|
#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
|
|
/*
|
|
* On pSeries, inform the firmware about our capabilities
|
|
*/
|
|
if (of_platform == PLATFORM_PSERIES ||
|
|
of_platform == PLATFORM_PSERIES_LPAR)
|
|
prom_send_capabilities();
|
|
#endif
|
|
|
|
/*
|
|
* Copy the CPU hold code
|
|
*/
|
|
if (of_platform != PLATFORM_POWERMAC)
|
|
copy_and_flush(0, kbase, 0x100, 0);
|
|
|
|
/*
|
|
* Do early parsing of command line
|
|
*/
|
|
early_cmdline_parse();
|
|
|
|
/*
|
|
* Initialize memory management within prom_init
|
|
*/
|
|
prom_init_mem();
|
|
|
|
/*
|
|
* Determine which cpu is actually running right _now_
|
|
*/
|
|
prom_find_boot_cpu();
|
|
|
|
/*
|
|
* Initialize display devices
|
|
*/
|
|
prom_check_displays();
|
|
|
|
#ifdef CONFIG_PPC64
|
|
/*
|
|
* Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
|
|
* that uses the allocator, we need to make sure we get the top of memory
|
|
* available for us here...
|
|
*/
|
|
if (of_platform == PLATFORM_PSERIES)
|
|
prom_initialize_tce_table();
|
|
#endif
|
|
|
|
/*
|
|
* On non-powermacs, try to instantiate RTAS. PowerMacs don't
|
|
* have a usable RTAS implementation.
|
|
*/
|
|
if (of_platform != PLATFORM_POWERMAC &&
|
|
of_platform != PLATFORM_OPAL)
|
|
prom_instantiate_rtas();
|
|
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
/* Detect HAL and try instanciating it & doing takeover */
|
|
if (of_platform == PLATFORM_PSERIES_LPAR) {
|
|
prom_query_opal();
|
|
if (of_platform == PLATFORM_OPAL) {
|
|
prom_opal_hold_cpus();
|
|
prom_opal_takeover();
|
|
}
|
|
} else if (of_platform == PLATFORM_OPAL)
|
|
prom_instantiate_opal();
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC64
|
|
/* instantiate sml */
|
|
prom_instantiate_sml();
|
|
#endif
|
|
|
|
/*
|
|
* On non-powermacs, put all CPUs in spin-loops.
|
|
*
|
|
* PowerMacs use a different mechanism to spin CPUs
|
|
*/
|
|
if (of_platform != PLATFORM_POWERMAC &&
|
|
of_platform != PLATFORM_OPAL)
|
|
prom_hold_cpus();
|
|
|
|
/*
|
|
* Fill in some infos for use by the kernel later on
|
|
*/
|
|
if (prom_memory_limit)
|
|
prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
|
|
&prom_memory_limit,
|
|
sizeof(prom_memory_limit));
|
|
#ifdef CONFIG_PPC64
|
|
if (prom_iommu_off)
|
|
prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
|
|
NULL, 0);
|
|
|
|
if (prom_iommu_force_on)
|
|
prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
|
|
NULL, 0);
|
|
|
|
if (prom_tce_alloc_start) {
|
|
prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
|
|
&prom_tce_alloc_start,
|
|
sizeof(prom_tce_alloc_start));
|
|
prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
|
|
&prom_tce_alloc_end,
|
|
sizeof(prom_tce_alloc_end));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Fixup any known bugs in the device-tree
|
|
*/
|
|
fixup_device_tree();
|
|
|
|
/*
|
|
* Now finally create the flattened device-tree
|
|
*/
|
|
prom_printf("copying OF device tree...\n");
|
|
flatten_device_tree();
|
|
|
|
/*
|
|
* in case stdin is USB and still active on IBM machines...
|
|
* Unfortunately quiesce crashes on some powermacs if we have
|
|
* closed stdin already (in particular the powerbook 101). It
|
|
* appears that the OPAL version of OFW doesn't like it either.
|
|
*/
|
|
if (of_platform != PLATFORM_POWERMAC &&
|
|
of_platform != PLATFORM_OPAL)
|
|
prom_close_stdin();
|
|
|
|
/*
|
|
* Call OF "quiesce" method to shut down pending DMA's from
|
|
* devices etc...
|
|
*/
|
|
prom_printf("Calling quiesce...\n");
|
|
call_prom("quiesce", 0, 0);
|
|
|
|
/*
|
|
* And finally, call the kernel passing it the flattened device
|
|
* tree and NULL as r5, thus triggering the new entry point which
|
|
* is common to us and kexec
|
|
*/
|
|
hdr = dt_header_start;
|
|
|
|
/* Don't print anything after quiesce under OPAL, it crashes OFW */
|
|
if (of_platform != PLATFORM_OPAL) {
|
|
prom_printf("returning from prom_init\n");
|
|
prom_debug("->dt_header_start=0x%x\n", hdr);
|
|
}
|
|
|
|
#ifdef CONFIG_PPC32
|
|
reloc_got2(-offset);
|
|
#else
|
|
unreloc_toc();
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
|
|
/* OPAL early debug gets the OPAL base & entry in r8 and r9 */
|
|
__start(hdr, kbase, 0, 0, 0,
|
|
prom_opal_base, prom_opal_entry);
|
|
#else
|
|
__start(hdr, kbase, 0, 0, 0, 0, 0);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|