2005-04-16 16:20:36 -06:00
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/*
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* arch/alpha/boot/bootp.c
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*
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* Copyright (C) 1997 Jay Estabrook
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*
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* This file is used for creating a bootp file for the Linux/AXP kernel
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*
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* based significantly on the arch/alpha/boot/main.c of Linus Torvalds
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*/
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#include <linux/kernel.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 02:04:11 -06:00
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#include <linux/slab.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/string.h>
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2009-10-17 16:52:28 -06:00
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#include <generated/utsrelease.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/mm.h>
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#include <asm/console.h>
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#include <asm/hwrpb.h>
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#include <asm/pgtable.h>
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#include <asm/io.h>
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#include <stdarg.h>
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#include "ksize.h"
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extern unsigned long switch_to_osf_pal(unsigned long nr,
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struct pcb_struct * pcb_va, struct pcb_struct * pcb_pa,
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unsigned long *vptb);
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extern void move_stack(unsigned long new_stack);
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struct hwrpb_struct *hwrpb = INIT_HWRPB;
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static struct pcb_struct pcb_va[1];
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/*
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* Find a physical address of a virtual object..
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*
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* This is easy using the virtual page table address.
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*/
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static inline void *
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find_pa(unsigned long *vptb, void *ptr)
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{
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unsigned long address = (unsigned long) ptr;
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unsigned long result;
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result = vptb[address >> 13];
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result >>= 32;
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result <<= 13;
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result |= address & 0x1fff;
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return (void *) result;
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}
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/*
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* This function moves into OSF/1 pal-code, and has a temporary
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* PCB for that. The kernel proper should replace this PCB with
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* the real one as soon as possible.
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*
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* The page table muckery in here depends on the fact that the boot
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* code has the L1 page table identity-map itself in the second PTE
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* in the L1 page table. Thus the L1-page is virtually addressable
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* itself (through three levels) at virtual address 0x200802000.
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*/
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#define VPTB ((unsigned long *) 0x200000000)
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#define L1 ((unsigned long *) 0x200802000)
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void
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pal_init(void)
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{
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unsigned long i, rev;
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struct percpu_struct * percpu;
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struct pcb_struct * pcb_pa;
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/* Create the dummy PCB. */
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pcb_va->ksp = 0;
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pcb_va->usp = 0;
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pcb_va->ptbr = L1[1] >> 32;
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pcb_va->asn = 0;
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pcb_va->pcc = 0;
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pcb_va->unique = 0;
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pcb_va->flags = 1;
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pcb_va->res1 = 0;
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pcb_va->res2 = 0;
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pcb_pa = find_pa(VPTB, pcb_va);
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/*
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* a0 = 2 (OSF)
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* a1 = return address, but we give the asm the vaddr of the PCB
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* a2 = physical addr of PCB
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* a3 = new virtual page table pointer
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* a4 = KSP (but the asm sets it)
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*/
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srm_printk("Switching to OSF PAL-code .. ");
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i = switch_to_osf_pal(2, pcb_va, pcb_pa, VPTB);
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if (i) {
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srm_printk("failed, code %ld\n", i);
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__halt();
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}
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percpu = (struct percpu_struct *)
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(INIT_HWRPB->processor_offset + (unsigned long) INIT_HWRPB);
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rev = percpu->pal_revision = percpu->palcode_avail[2];
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srm_printk("Ok (rev %lx)\n", rev);
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tbia(); /* do it directly in case we are SMP */
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}
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static inline void
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load(unsigned long dst, unsigned long src, unsigned long count)
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{
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memcpy((void *)dst, (void *)src, count);
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}
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/*
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* Start the kernel.
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*/
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static inline void
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runkernel(void)
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{
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__asm__ __volatile__(
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"bis %0,%0,$27\n\t"
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"jmp ($27)"
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: /* no outputs: it doesn't even return */
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: "r" (START_ADDR));
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}
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extern char _end;
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#define KERNEL_ORIGIN \
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((((unsigned long)&_end) + 511) & ~511)
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void
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start_kernel(void)
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{
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/*
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* Note that this crufty stuff with static and envval
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* and envbuf is because:
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*
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* 1. Frequently, the stack is short, and we don't want to overrun;
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* 2. Frequently the stack is where we are going to copy the kernel to;
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* 3. A certain SRM console required the GET_ENV output to stack.
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* ??? A comment in the aboot sources indicates that the GET_ENV
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* destination must be quadword aligned. Might this explain the
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* behaviour, rather than requiring output to the stack, which
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* seems rather far-fetched.
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*/
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static long nbytes;
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static char envval[256] __attribute__((aligned(8)));
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static unsigned long initrd_start;
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srm_printk("Linux/AXP bootp loader for Linux " UTS_RELEASE "\n");
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if (INIT_HWRPB->pagesize != 8192) {
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srm_printk("Expected 8kB pages, got %ldkB\n",
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INIT_HWRPB->pagesize >> 10);
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return;
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}
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if (INIT_HWRPB->vptb != (unsigned long) VPTB) {
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srm_printk("Expected vptb at %p, got %p\n",
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VPTB, (void *)INIT_HWRPB->vptb);
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return;
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}
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pal_init();
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/* The initrd must be page-aligned. See below for the
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cause of the magic number 5. */
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initrd_start = ((START_ADDR + 5*KERNEL_SIZE + PAGE_SIZE) |
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(PAGE_SIZE-1)) + 1;
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#ifdef INITRD_IMAGE_SIZE
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srm_printk("Initrd positioned at %#lx\n", initrd_start);
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#endif
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/*
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* Move the stack to a safe place to ensure it won't be
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* overwritten by kernel image.
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*/
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move_stack(initrd_start - PAGE_SIZE);
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nbytes = callback_getenv(ENV_BOOTED_OSFLAGS, envval, sizeof(envval));
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if (nbytes < 0 || nbytes >= sizeof(envval)) {
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nbytes = 0;
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}
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envval[nbytes] = '\0';
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srm_printk("Loading the kernel...'%s'\n", envval);
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/* NOTE: *no* callbacks or printouts from here on out!!! */
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/* This is a hack, as some consoles seem to get virtual 20000000 (ie
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* where the SRM console puts the kernel bootp image) memory
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* overlapping physical memory where the kernel wants to be put,
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* which causes real problems when attempting to copy the former to
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* the latter... :-(
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*
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* So, we first move the kernel virtual-to-physical way above where
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* we physically want the kernel to end up, then copy it from there
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* to its final resting place... ;-}
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*
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* Sigh... */
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#ifdef INITRD_IMAGE_SIZE
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load(initrd_start, KERNEL_ORIGIN+KERNEL_SIZE, INITRD_IMAGE_SIZE);
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#endif
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load(START_ADDR+(4*KERNEL_SIZE), KERNEL_ORIGIN, KERNEL_SIZE);
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load(START_ADDR, START_ADDR+(4*KERNEL_SIZE), KERNEL_SIZE);
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memset((char*)ZERO_PGE, 0, PAGE_SIZE);
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strcpy((char*)ZERO_PGE, envval);
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#ifdef INITRD_IMAGE_SIZE
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((long *)(ZERO_PGE+256))[0] = initrd_start;
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((long *)(ZERO_PGE+256))[1] = INITRD_IMAGE_SIZE;
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#endif
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runkernel();
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}
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