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[PARISC] Further work for multiple page sizes 

More work towards supporing multiple page sizes on 64-bit. Convert
some assumptions that 64bit uses 3 level page tables into testing
PT_NLEVELS. Also some BUG() to BUG_ON() conversions and some cleanups
to assembler.

Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
hifive-unleashed-5.1
Helge Deller 2006-04-20 20:40:23 +00:00 committed by Kyle McMartin
parent d668da80d6
commit 2fd8303816
11 changed files with 198 additions and 102 deletions
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31
arch/parisc/Kconfig
View File

@ -138,6 +138,37 @@ config 64BIT
enable this option otherwise. The 64bit kernel is significantly bigger
and slower than the 32bit one.
choice
prompt "Kernel page size"
default PARISC_PAGE_SIZE_4KB if !64BIT
default PARISC_PAGE_SIZE_4KB if 64BIT
# default PARISC_PAGE_SIZE_16KB if 64BIT
config PARISC_PAGE_SIZE_4KB
bool "4KB"
help
This lets you select the page size of the kernel. For best
performance, a page size of 16KB is recommended. For best
compatibility with 32bit applications, a page size of 4KB should be
selected (the vast majority of 32bit binaries work perfectly fine
with a larger page size).
4KB For best 32bit compatibility
16KB For best performance
64KB For best performance, might give more overhead.
If you don't know what to do, choose 4KB.
config PARISC_PAGE_SIZE_16KB
bool "16KB (EXPERIMENTAL)"
depends on PA8X00 && EXPERIMENTAL
config PARISC_PAGE_SIZE_64KB
bool "64KB (EXPERIMENTAL)"
depends on PA8X00 && EXPERIMENTAL
endchoice
config SMP
bool "Symmetric multi-processing support"
---help---

3
arch/parisc/kernel/asm-offsets.c
View File

@ -288,8 +288,11 @@ int main(void)
DEFINE(ASM_PGD_ENTRY_SIZE, PGD_ENTRY_SIZE);
DEFINE(ASM_PMD_ENTRY_SIZE, PMD_ENTRY_SIZE);
DEFINE(ASM_PTE_ENTRY_SIZE, PTE_ENTRY_SIZE);
DEFINE(ASM_PFN_PTE_SHIFT, PFN_PTE_SHIFT);
DEFINE(ASM_PT_INITIAL, PT_INITIAL);
DEFINE(ASM_PAGE_SIZE, PAGE_SIZE);
DEFINE(ASM_PAGE_SIZE_DIV64, PAGE_SIZE/64);
DEFINE(ASM_PAGE_SIZE_DIV128, PAGE_SIZE/128);
BLANK();
DEFINE(EXCDATA_IP, offsetof(struct exception_data, fault_ip));
DEFINE(EXCDATA_SPACE, offsetof(struct exception_data, fault_space));

36
arch/parisc/kernel/entry.S
View File

@ -502,18 +502,20 @@
* all ILP32 processes and all the kernel for machines with
* under 4GB of memory) */
.macro L3_ptep pgd,pte,index,va,fault
#if PT_NLEVELS == 3 /* we might have a 2-Level scheme, e.g. with 16kb page size */
extrd,u \va,63-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index
copy %r0,\pte
extrd,u,*= \va,31,32,%r0
extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
ldw,s \index(\pgd),\pgd
extrd,u,*= \va,31,32,%r0
extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
bb,>=,n \pgd,_PxD_PRESENT_BIT,\fault
extrd,u,*= \va,31,32,%r0
extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
shld \pgd,PxD_VALUE_SHIFT,\index
extrd,u,*= \va,31,32,%r0
extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
copy \index,\pgd
extrd,u,*<> \va,31,32,%r0
extrd,u,*<> \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
ldo ASM_PGD_PMD_OFFSET(\pgd),\pgd
#endif
L2_ptep \pgd,\pte,\index,\va,\fault
.endm
@ -563,10 +565,18 @@
extrd,u,*= \pte,_PAGE_GATEWAY_BIT+32,1,%r0
depd %r0,11,2,\prot /* If Gateway, Set PL2 to 0 */
/* Get rid of prot bits and convert to page addr for iitlbt and idtlbt */
/* Enforce uncacheable pages.
* This should ONLY be use for MMIO on PA 2.0 machines.
* Memory/DMA is cache coherent on all PA2.0 machines we support
* (that means T-class is NOT supported) and the memory controllers
* on most of those machines only handles cache transactions.
*/
extrd,u,*= \pte,_PAGE_NO_CACHE_BIT+32,1,%r0
depi 1,12,1,\prot
depd %r0,63,PAGE_SHIFT,\pte
extrd,s \pte,(63-PAGE_SHIFT)+(63-58),64-PAGE_SHIFT,\pte
/* Drop prot bits and convert to page addr for iitlbt and idtlbt */
extrd,u \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58),64-PAGE_SHIFT,\pte
depdi _PAGE_SIZE_ENCODING_DEFAULT,63,63-58,\pte
.endm
/* Identical macro to make_insert_tlb above, except it
@ -584,9 +594,8 @@
/* Get rid of prot bits and convert to page addr for iitlba */
depi 0,31,PAGE_SHIFT,\pte
depi _PAGE_SIZE_ENCODING_DEFAULT,31,ASM_PFN_PTE_SHIFT,\pte
extru \pte,24,25,\pte
.endm
/* This is for ILP32 PA2.0 only. The TLB insertion needs
@ -1201,10 +1210,9 @@ intr_save:
*/
/* adjust isr/ior. */
extrd,u %r16,63,7,%r1 /* get high bits from isr for ior */
depd %r1,31,7,%r17 /* deposit them into ior */
depdi 0,63,7,%r16 /* clear them from isr */
extrd,u %r16,63,SPACEID_SHIFT,%r1 /* get high bits from isr for ior */
depd %r1,31,SPACEID_SHIFT,%r17 /* deposit them into ior */
depdi 0,63,SPACEID_SHIFT,%r16 /* clear them from isr */
#endif
STREG %r16, PT_ISR(%r29)
STREG %r17, PT_IOR(%r29)

15
arch/parisc/kernel/head.S
View File

@ -76,16 +76,16 @@ $bss_loop:
mtctl %r4,%cr24 /* Initialize kernel root pointer */
mtctl %r4,%cr25 /* Initialize user root pointer */
#ifdef CONFIG_64BIT
#if PT_NLEVELS == 3
/* Set pmd in pgd */
load32 PA(pmd0),%r5
shrd %r5,PxD_VALUE_SHIFT,%r3
ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3
ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3
stw %r3,ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4)
ldo ASM_PMD_ENTRY*ASM_PMD_ENTRY_SIZE(%r5),%r4
#else
/* 2-level page table, so pmd == pgd */
ldo ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4),%r4
ldo ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4),%r4
#endif
/* Fill in pmd with enough pte directories */
@ -99,7 +99,7 @@ $bss_loop:
stw %r3,0(%r4)
ldo (ASM_PAGE_SIZE >> PxD_VALUE_SHIFT)(%r3),%r3
addib,> -1,%r1,1b
#ifdef CONFIG_64BIT
#if PT_NLEVELS == 3
ldo ASM_PMD_ENTRY_SIZE(%r4),%r4
#else
ldo ASM_PGD_ENTRY_SIZE(%r4),%r4
@ -107,13 +107,14 @@ $bss_loop:
/* Now initialize the PTEs themselves */
ldo _PAGE_KERNEL(%r0),%r3 /* Hardwired 0 phys addr start */
ldo 0+_PAGE_KERNEL(%r0),%r3 /* Hardwired 0 phys addr start */
ldi (1<<(KERNEL_INITIAL_ORDER-PAGE_SHIFT)),%r11 /* PFN count */
load32 PA(pg0),%r1
$pgt_fill_loop:
STREGM %r3,ASM_PTE_ENTRY_SIZE(%r1)
ldo ASM_PAGE_SIZE(%r3),%r3
bb,>= %r3,31-KERNEL_INITIAL_ORDER,$pgt_fill_loop
ldo (1<<PFN_PTE_SHIFT)(%r3),%r3 /* add one PFN */
addib,> -1,%r11,$pgt_fill_loop
nop
/* Load the return address...er...crash 'n burn */

10
arch/parisc/kernel/init_task.c
View File

@ -53,17 +53,17 @@ union thread_union init_thread_union
__attribute__((aligned(128))) __attribute__((__section__(".data.init_task"))) =
{ INIT_THREAD_INFO(init_task) };
#ifdef __LP64__
#if PT_NLEVELS == 3
/* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout
* with the first pmd adjacent to the pgd and below it. gcc doesn't actually
* guarantee that global objects will be laid out in memory in the same order
* as the order of declaration, so put these in different sections and use
* the linker script to order them. */
pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((aligned(PAGE_SIZE))) __attribute__ ((__section__ (".data.vm0.pmd"))) = { {0}, };
pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((__section__ (".data.vm0.pmd"), aligned(PAGE_SIZE)));
#endif
pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((aligned(PAGE_SIZE))) __attribute__ ((__section__ (".data.vm0.pgd"))) = { {0}, };
pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((aligned(PAGE_SIZE))) __attribute__ ((__section__ (".data.vm0.pte"))) = { {0}, };
pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((__section__ (".data.vm0.pgd"), aligned(PAGE_SIZE)));
pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((__section__ (".data.vm0.pte"), aligned(PAGE_SIZE)));
/*
* Initial task structure.

25
arch/parisc/kernel/pacache.S
View File

@ -65,7 +65,7 @@ flush_tlb_all_local:
*/
/* pcxt_ssm_bug - relied upon translation! PA 2.0 Arch. F-4 and F-5 */
rsm PSW_SM_I, %r19 /* save I-bit state */
rsm PSW_SM_I, %r19 /* save I-bit state */
load32 PA(1f), %r1
nop
nop
@ -84,8 +84,7 @@ flush_tlb_all_local:
rfi
nop
1: ldil L%PA(cache_info), %r1
ldo R%PA(cache_info)(%r1), %r1
1: load32 PA(cache_info), %r1
/* Flush Instruction Tlb */
@ -212,8 +211,7 @@ flush_instruction_cache_local:
.entry
mtsp %r0, %sr1
ldil L%cache_info, %r1
ldo R%cache_info(%r1), %r1
load32 cache_info, %r1
/* Flush Instruction Cache */
@ -254,8 +252,7 @@ flush_data_cache_local:
.entry
mtsp %r0, %sr1
ldil L%cache_info, %r1
ldo R%cache_info(%r1), %r1
load32 cache_info, %r1
/* Flush Data Cache */
@ -303,7 +300,8 @@ copy_user_page_asm:
*/
ldd 0(%r25), %r19
ldi 32, %r1 /* PAGE_SIZE/128 == 32 */
ldi ASM_PAGE_SIZE_DIV128, %r1
ldw 64(%r25), %r0 /* prefetch 1 cacheline ahead */
ldw 128(%r25), %r0 /* prefetch 2 */
@ -368,7 +366,7 @@ copy_user_page_asm:
* use ldd/std on a 32 bit kernel.
*/
ldw 0(%r25), %r19
ldi 64, %r1 /* PAGE_SIZE/64 == 64 */
ldi ASM_PAGE_SIZE_DIV64, %r1
1:
ldw 4(%r25), %r20
@ -461,6 +459,7 @@ copy_user_page_asm:
sub %r25, %r1, %r23 /* move physical addr into non shadowed reg */
ldil L%(TMPALIAS_MAP_START), %r28
/* FIXME for different page sizes != 4k */
#ifdef CONFIG_64BIT
extrd,u %r26,56,32, %r26 /* convert phys addr to tlb insert format */
extrd,u %r23,56,32, %r23 /* convert phys addr to tlb insert format */
@ -551,6 +550,7 @@ __clear_user_page_asm:
#ifdef CONFIG_64BIT
#if (TMPALIAS_MAP_START >= 0x80000000)
depdi 0, 31,32, %r28 /* clear any sign extension */
/* FIXME: page size dependend */
#endif
extrd,u %r26, 56,32, %r26 /* convert phys addr to tlb insert format */
depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
@ -566,10 +566,10 @@ __clear_user_page_asm:
pdtlb 0(%r28)
#ifdef CONFIG_64BIT
ldi 32, %r1 /* PAGE_SIZE/128 == 32 */
ldi ASM_PAGE_SIZE_DIV128, %r1
/* PREFETCH (Write) has not (yet) been proven to help here */
/* #define PREFETCHW_OP ldd 256(%0), %r0 */
/* #define PREFETCHW_OP ldd 256(%0), %r0 */
1: std %r0, 0(%r28)
std %r0, 8(%r28)
@ -591,8 +591,7 @@ __clear_user_page_asm:
ldo 128(%r28), %r28
#else /* ! CONFIG_64BIT */
ldi 64, %r1 /* PAGE_SIZE/64 == 64 */
ldi ASM_PAGE_SIZE_DIV64, %r1
1:
stw %r0, 0(%r28)

10
arch/parisc/kernel/syscall.S
View File

@ -55,7 +55,7 @@
* pointers.
*/
.align 4096
.align ASM_PAGE_SIZE
linux_gateway_page:
/* ADDRESS 0x00 to 0xb0 = 176 bytes / 4 bytes per insn = 44 insns */
@ -632,7 +632,7 @@ cas_action:
end_compare_and_swap:
/* Make sure nothing else is placed on this page */
.align 4096
.align ASM_PAGE_SIZE
.export end_linux_gateway_page
end_linux_gateway_page:
@ -652,7 +652,7 @@ end_linux_gateway_page:
.section .rodata,"a"
.align 4096
.align ASM_PAGE_SIZE
/* Light-weight-syscall table */
/* Start of lws table. */
.export lws_table
@ -662,14 +662,14 @@ lws_table:
LWS_ENTRY(compare_and_swap64) /* 1 - ELF64 Atomic compare and swap */
/* End of lws table */
.align 4096
.align ASM_PAGE_SIZE
.export sys_call_table
.Lsys_call_table:
sys_call_table:
#include "syscall_table.S"
#ifdef CONFIG_64BIT
.align 4096
.align ASM_PAGE_SIZE
.export sys_call_table64
.Lsys_call_table64:
sys_call_table64:

54
arch/parisc/kernel/vmlinux.lds.S
View File

@ -6,6 +6,7 @@
* Copyright (C) 2000 Michael Ang <mang with subcarrier.org>
* Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
* Copyright (C) 2003 James Bottomley <jejb with parisc-linux.org>
* Copyright (C) 2006 Helge Deller <deller@gmx.de>
*
*
* This program is free software; you can redistribute it and/or modify
@ -27,6 +28,7 @@
/* needed for the processor specific cache alignment size */
#include <asm/cache.h>
#include <asm/page.h>
#include <asm/asm-offsets.h>
/* ld script to make hppa Linux kernel */
#ifndef CONFIG_64BIT
@ -68,7 +70,7 @@ SECTIONS
RODATA
/* writeable */
. = ALIGN(4096); /* Make sure this is page aligned so
. = ALIGN(ASM_PAGE_SIZE); /* Make sure this is page aligned so
that we can properly leave these
as writable */
data_start = .;
@ -81,23 +83,17 @@ SECTIONS
__start___unwind = .; /* unwind info */
.PARISC.unwind : { *(.PARISC.unwind) }
__stop___unwind = .;
/* rarely changed data like cpu maps */
. = ALIGN(16);
.data.read_mostly : { *(.data.read_mostly) }
. = ALIGN(L1_CACHE_BYTES);
.data : { /* Data */
*(.data)
*(.data.vm0.pmd)
*(.data.vm0.pgd)
*(.data.vm0.pte)
CONSTRUCTORS
}
. = ALIGN(4096);
/* nosave data is really only used for software suspend...it's here
* just in case we ever implement it */
__nosave_begin = .;
.data_nosave : { *(.data.nosave) }
. = ALIGN(4096);
__nosave_end = .;
. = ALIGN(L1_CACHE_BYTES);
.data.cacheline_aligned : { *(.data.cacheline_aligned) }
@ -105,12 +101,29 @@ SECTIONS
. = ALIGN(16);
.data.lock_aligned : { *(.data.lock_aligned) }
/* rarely changed data like cpu maps */
. = ALIGN(16);
.data.read_mostly : { *(.data.read_mostly) }
. = ALIGN(ASM_PAGE_SIZE);
/* nosave data is really only used for software suspend...it's here
* just in case we ever implement it */
__nosave_begin = .;
.data_nosave : { *(.data.nosave) }
. = ALIGN(ASM_PAGE_SIZE);
__nosave_end = .;
_edata = .; /* End of data section */
__bss_start = .; /* BSS */
/* page table entries need to be PAGE_SIZE aligned */
. = ALIGN(ASM_PAGE_SIZE);
.data.vmpages : {
*(.data.vm0.pmd)
*(.data.vm0.pgd)
*(.data.vm0.pte)
}
.bss : { *(.bss) *(COMMON) }
__bss_stop = .;
/* assembler code expects init_task to be 16k aligned */
. = ALIGN(16384); /* init_task */
.data.init_task : { *(.data.init_task) }
@ -126,6 +139,7 @@ SECTIONS
.dlt : { *(.dlt) }
#endif
/* reserve space for interrupt stack by aligning __init* to 16k */
. = ALIGN(16384);
__init_begin = .;
.init.text : {
@ -166,7 +180,7 @@ SECTIONS
from .altinstructions and .eh_frame */
.exit.text : { *(.exit.text) }
.exit.data : { *(.exit.data) }
. = ALIGN(4096);
. = ALIGN(ASM_PAGE_SIZE);
__initramfs_start = .;
.init.ramfs : { *(.init.ramfs) }
__initramfs_end = .;
@ -174,14 +188,10 @@ SECTIONS
__per_cpu_start = .;
.data.percpu : { *(.data.percpu) }
__per_cpu_end = .;
. = ALIGN(4096);
. = ALIGN(ASM_PAGE_SIZE);
__init_end = .;
/* freed after init ends here */
__bss_start = .; /* BSS */
.bss : { *(.bss) *(COMMON) }
__bss_stop = .;
_end = . ;
/* Sections to be discarded */

28
arch/parisc/mm/init.c
View File

@ -6,6 +6,7 @@
* changed by Philipp Rumpf
* Copyright 1999 Philipp Rumpf (prumpf@tux.org)
* Copyright 2004 Randolph Chung (tausq@debian.org)
* Copyright 2006 Helge Deller (deller@gmx.de)
*
*/
@ -371,8 +372,8 @@ static void __init setup_bootmem(void)
void free_initmem(void)
{
unsigned long addr;
unsigned long addr, init_begin, init_end;
printk(KERN_INFO "Freeing unused kernel memory: ");
#ifdef CONFIG_DEBUG_KERNEL
@ -395,8 +396,11 @@ void free_initmem(void)
local_irq_enable();
#endif
addr = (unsigned long)(&__init_begin);
for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
/* align __init_begin and __init_end to page size,
ignoring linker script where we might have tried to save RAM */
init_begin = PAGE_ALIGN((unsigned long)(&__init_begin));
init_end = PAGE_ALIGN((unsigned long)(&__init_end));
for (addr = init_begin; addr < init_end; addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
free_page(addr);
@ -407,7 +411,7 @@ void free_initmem(void)
/* set up a new led state on systems shipped LED State panel */
pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10);
printk("%luk freed\n", (init_end - init_begin) >> 10);
}
@ -639,11 +643,13 @@ static void __init map_pages(unsigned long start_vaddr, unsigned long start_padd
* Map the fault vector writable so we can
* write the HPMC checksum.
*/
#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
if (address >= ro_start && address < ro_end
&& address != fv_addr
&& address != gw_addr)
pte = __mk_pte(address, PAGE_KERNEL_RO);
else
#endif
pte = __mk_pte(address, pgprot);
if (address >= end_paddr)
@ -874,8 +880,7 @@ unsigned long alloc_sid(void)
flush_tlb_all(); /* flush_tlb_all() calls recycle_sids() */
spin_lock(&sid_lock);
}
if (free_space_ids == 0)
BUG();
BUG_ON(free_space_ids == 0);
}
free_space_ids--;
@ -899,8 +904,7 @@ void free_sid(unsigned long spaceid)
spin_lock(&sid_lock);
if (*dirty_space_offset & (1L << index))
BUG(); /* attempt to free space id twice */
BUG_ON(*dirty_space_offset & (1L << index)); /* attempt to free space id twice */
*dirty_space_offset |= (1L << index);
dirty_space_ids++;
@ -975,7 +979,7 @@ static void recycle_sids(void)
static unsigned long recycle_ndirty;
static unsigned long recycle_dirty_array[SID_ARRAY_SIZE];
static unsigned int recycle_inuse = 0;
static unsigned int recycle_inuse;
void flush_tlb_all(void)
{
@ -984,9 +988,7 @@ void flush_tlb_all(void)
do_recycle = 0;
spin_lock(&sid_lock);
if (dirty_space_ids > RECYCLE_THRESHOLD) {
if (recycle_inuse) {
BUG(); /* FIXME: Use a semaphore/wait queue here */
}
BUG_ON(recycle_inuse); /* FIXME: Use a semaphore/wait queue here */
get_dirty_sids(&recycle_ndirty,recycle_dirty_array);
recycle_inuse++;
do_recycle++;

25
include/asm-parisc/page.h
View File

@ -1,13 +1,30 @@
#ifndef _PARISC_PAGE_H
#define _PARISC_PAGE_H
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#if !defined(__KERNEL__)
/* this is for userspace applications (4k page size) */
# define PAGE_SHIFT 12 /* 4k */
# define PAGE_SIZE (1UL << PAGE_SHIFT)
# define PAGE_MASK (~(PAGE_SIZE-1))
#endif
#ifdef __KERNEL__
#include <linux/config.h>
#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
# define PAGE_SHIFT 12 /* 4k */
#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
# define PAGE_SHIFT 14 /* 16k */
#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
# define PAGE_SHIFT 16 /* 64k */
#else
# error "unknown default kernel page size"
#endif
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#ifndef __ASSEMBLY__
#include <asm/types.h>

63
include/asm-parisc/pgtable.h
View File

@ -59,16 +59,15 @@
#define ISTACK_SIZE 32768 /* Interrupt Stack Size */
#define ISTACK_ORDER 3
/* This is the size of the initially mapped kernel memory (i.e. currently
* 0 to 1<<23 == 8MB */
/* This is the size of the initially mapped kernel memory */
#ifdef CONFIG_64BIT
#define KERNEL_INITIAL_ORDER 24
#define KERNEL_INITIAL_ORDER 24 /* 0 to 1<<24 = 16MB */
#else
#define KERNEL_INITIAL_ORDER 23
#define KERNEL_INITIAL_ORDER 23 /* 0 to 1<<23 = 8MB */
#endif
#define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER)
#ifdef CONFIG_64BIT
#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
#define PT_NLEVELS 3
#define PGD_ORDER 1 /* Number of pages per pgd */
#define PMD_ORDER 1 /* Number of pages per pmd */
@ -111,11 +110,15 @@
#define MAX_ADDRBITS (PGDIR_SHIFT + BITS_PER_PGD)
#define MAX_ADDRESS (1UL << MAX_ADDRBITS)
#define SPACEID_SHIFT (MAX_ADDRBITS - 32)
#define SPACEID_SHIFT (MAX_ADDRBITS - 32)
/* This calculates the number of initial pages we need for the initial
* page tables */
#define PT_INITIAL (1 << (KERNEL_INITIAL_ORDER - PMD_SHIFT))
#if (KERNEL_INITIAL_ORDER) >= (PMD_SHIFT)
# define PT_INITIAL (1 << (KERNEL_INITIAL_ORDER - PMD_SHIFT))
#else
# define PT_INITIAL (1) /* all initial PTEs fit into one page */
#endif
/*
* pgd entries used up by user/kernel:
@ -160,6 +163,10 @@ extern void *vmalloc_start;
* to zero */
#define PTE_SHIFT xlate_pabit(_PAGE_USER_BIT)
/* PFN_PTE_SHIFT defines the shift of a PTE value to access the PFN field */
#define PFN_PTE_SHIFT 12
/* this is how many bits may be used by the file functions */
#define PTE_FILE_MAX_BITS (BITS_PER_LONG - PTE_SHIFT)
@ -188,7 +195,8 @@ extern void *vmalloc_start;
/* The pgd/pmd contains a ptr (in phys addr space); since all pgds/pmds
* are page-aligned, we don't care about the PAGE_OFFSET bits, except
* for a few meta-information bits, so we shift the address to be
* able to effectively address 40-bits of physical address space. */
* able to effectively address 40/42/44-bits of physical address space
* depending on 4k/16k/64k PAGE_SIZE */
#define _PxD_PRESENT_BIT 31
#define _PxD_ATTACHED_BIT 30
#define _PxD_VALID_BIT 29
@ -198,7 +206,7 @@ extern void *vmalloc_start;
#define PxD_FLAG_VALID (1 << xlate_pabit(_PxD_VALID_BIT))
#define PxD_FLAG_MASK (0xf)
#define PxD_FLAG_SHIFT (4)
#define PxD_VALUE_SHIFT (8)
#define PxD_VALUE_SHIFT (8) /* (PAGE_SHIFT-PxD_FLAG_SHIFT) */
#ifndef __ASSEMBLY__
@ -246,6 +254,7 @@ extern void *vmalloc_start;
#define __S110 PAGE_RWX
#define __S111 PAGE_RWX
extern pgd_t swapper_pg_dir[]; /* declared in init_task.c */
/* initial page tables for 0-8MB for kernel */
@ -272,7 +281,7 @@ extern unsigned long *empty_zero_page;
#define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK)
#define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
#ifdef CONFIG_64BIT
#if PT_NLEVELS == 3
/* The first entry of the permanent pmd is not there if it contains
* the gateway marker */
#define pmd_none(x) (!pmd_val(x) || pmd_flag(x) == PxD_FLAG_ATTACHED)
@ -282,7 +291,7 @@ extern unsigned long *empty_zero_page;
#define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID))
#define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT)
static inline void pmd_clear(pmd_t *pmd) {
#ifdef CONFIG_64BIT
#if PT_NLEVELS == 3
if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
/* This is the entry pointing to the permanent pmd
* attached to the pgd; cannot clear it */
@ -303,7 +312,7 @@ static inline void pmd_clear(pmd_t *pmd) {
#define pgd_bad(x) (!(pgd_flag(x) & PxD_FLAG_VALID))
#define pgd_present(x) (pgd_flag(x) & PxD_FLAG_PRESENT)
static inline void pgd_clear(pgd_t *pgd) {
#ifdef CONFIG_64BIT
#if PT_NLEVELS == 3
if(pgd_flag(*pgd) & PxD_FLAG_ATTACHED)
/* This is the permanent pmd attached to the pgd; cannot
* free it */
@ -351,7 +360,7 @@ extern inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; return
({ \
pte_t __pte; \
\
pte_val(__pte) = ((addr)+pgprot_val(pgprot)); \
pte_val(__pte) = ((((addr)>>PAGE_SHIFT)<<PFN_PTE_SHIFT) + pgprot_val(pgprot)); \
\
__pte; \
})
@ -361,20 +370,16 @@ extern inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; return
static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
{
pte_t pte;
pte_val(pte) = (pfn << PAGE_SHIFT) | pgprot_val(pgprot);
pte_val(pte) = (pfn << PFN_PTE_SHIFT) | pgprot_val(pgprot);
return pte;
}
/* This takes a physical page address that is used by the remapping functions */
#define mk_pte_phys(physpage, pgprot) \
({ pte_t __pte; pte_val(__pte) = physpage + pgprot_val(pgprot); __pte; })
extern inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{ pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); return pte; }
/* Permanent address of a page. On parisc we don't have highmem. */
#define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
#define pte_pfn(x) (pte_val(x) >> PFN_PTE_SHIFT)
#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
@ -499,6 +504,26 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
#endif /* !__ASSEMBLY__ */
/* TLB page size encoding - see table 3-1 in parisc20.pdf */
#define _PAGE_SIZE_ENCODING_4K 0
#define _PAGE_SIZE_ENCODING_16K 1
#define _PAGE_SIZE_ENCODING_64K 2
#define _PAGE_SIZE_ENCODING_256K 3
#define _PAGE_SIZE_ENCODING_1M 4
#define _PAGE_SIZE_ENCODING_4M 5
#define _PAGE_SIZE_ENCODING_16M 6
#define _PAGE_SIZE_ENCODING_64M 7
#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4K
#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16K
#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_64K
#endif
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
remap_pfn_range(vma, vaddr, pfn, size, prot)