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linux-next/arch/arm/mm/proc-arm720.S
Kirill A. Shutemov 4fb2847437 ARM: 5727/1: Pass IFSR register to do_PrefetchAbort() 
Instruction fault status register, IFSR, was introduced on ARMv6 to
provide status information about the last insturction fault. It
needed for proper prefetch abort handling.

Now we have three prefetch abort model:

  * legacy - for CPUs before ARMv6. They doesn't provide neither
    IFSR nor IFAR. We simulate IFSR with section translation fault
    status for them to generalize code;
  * ARMv6 - provides IFSR, but not IFAR;
  * ARMv7 - provides both IFSR and IFAR.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-10-02 22:34:32 +01:00

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7.1 KiB
ArmAsm
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/*
* linux/arch/arm/mm/proc-arm720.S: MMU functions for ARM720
*
* Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
* Rob Scott (rscott@mtrob.fdns.net)
* Copyright (C) 2000 ARM Limited, Deep Blue Solutions Ltd.
* hacked for non-paged-MM by Hyok S. Choi, 2004.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* These are the low level assembler for performing cache and TLB
* functions on the ARM720T. The ARM720T has a writethrough IDC
* cache, so we don't need to clean it.
*
* Changelog:
* 05-09-2000 SJH Created by moving 720 specific functions
* out of 'proc-arm6,7.S' per RMK discussion
* 07-25-2000 SJH Added idle function.
* 08-25-2000 DBS Updated for integration of ARM Ltd version.
* 04-20-2004 HSC modified for non-paged memory management mode.
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/hwcap.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#include <asm/ptrace.h>
#include "proc-macros.S"
/*
* Function: arm720_proc_init (void)
* : arm720_proc_fin (void)
*
* Notes : This processor does not require these
*/
ENTRY(cpu_arm720_dcache_clean_area)
ENTRY(cpu_arm720_proc_init)
mov pc, lr
ENTRY(cpu_arm720_proc_fin)
stmfd sp!, {lr}
mov ip, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
msr cpsr_c, ip
mrc p15, 0, r0, c1, c0, 0
bic r0, r0, #0x1000 @ ...i............
bic r0, r0, #0x000e @ ............wca.
mcr p15, 0, r0, c1, c0, 0 @ disable caches
mcr p15, 0, r1, c7, c7, 0 @ invalidate cache
ldmfd sp!, {pc}
/*
* Function: arm720_proc_do_idle(void)
* Params : r0 = unused
* Purpose : put the processer in proper idle mode
*/
ENTRY(cpu_arm720_do_idle)
mov pc, lr
/*
* Function: arm720_switch_mm(unsigned long pgd_phys)
* Params : pgd_phys Physical address of page table
* Purpose : Perform a task switch, saving the old process' state and restoring
* the new.
*/
ENTRY(cpu_arm720_switch_mm)
#ifdef CONFIG_MMU
mov r1, #0
mcr p15, 0, r1, c7, c7, 0 @ invalidate cache
mcr p15, 0, r0, c2, c0, 0 @ update page table ptr
mcr p15, 0, r1, c8, c7, 0 @ flush TLB (v4)
#endif
mov pc, lr
/*
* Function: arm720_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext)
* Params : r0 = Address to set
* : r1 = value to set
* Purpose : Set a PTE and flush it out of any WB cache
*/
.align 5
ENTRY(cpu_arm720_set_pte_ext)
#ifdef CONFIG_MMU
armv3_set_pte_ext wc_disable=0
#endif
mov pc, lr
/*
* Function: arm720_reset
* Params : r0 = address to jump to
* Notes : This sets up everything for a reset
*/
ENTRY(cpu_arm720_reset)
mov ip, #0
mcr p15, 0, ip, c7, c7, 0 @ invalidate cache
#ifdef CONFIG_MMU
mcr p15, 0, ip, c8, c7, 0 @ flush TLB (v4)
#endif
mrc p15, 0, ip, c1, c0, 0 @ get ctrl register
bic ip, ip, #0x000f @ ............wcam
bic ip, ip, #0x2100 @ ..v....s........
mcr p15, 0, ip, c1, c0, 0 @ ctrl register
mov pc, r0
__INIT
.type __arm710_setup, #function
__arm710_setup:
mov r0, #0
mcr p15, 0, r0, c7, c7, 0 @ invalidate caches
#ifdef CONFIG_MMU
mcr p15, 0, r0, c8, c7, 0 @ flush TLB (v4)
#endif
mrc p15, 0, r0, c1, c0 @ get control register
ldr r5, arm710_cr1_clear
bic r0, r0, r5
ldr r5, arm710_cr1_set
orr r0, r0, r5
mov pc, lr @ __ret (head.S)
.size __arm710_setup, . - __arm710_setup
/*
* R
* .RVI ZFRS BLDP WCAM
* .... 0001 ..11 1101
*
*/
.type arm710_cr1_clear, #object
.type arm710_cr1_set, #object
arm710_cr1_clear:
.word 0x0f3f
arm710_cr1_set:
.word 0x013d
.type __arm720_setup, #function
__arm720_setup:
mov r0, #0
mcr p15, 0, r0, c7, c7, 0 @ invalidate caches
#ifdef CONFIG_MMU
mcr p15, 0, r0, c8, c7, 0 @ flush TLB (v4)
#endif
adr r5, arm720_crval
ldmia r5, {r5, r6}
mrc p15, 0, r0, c1, c0 @ get control register
bic r0, r0, r5
orr r0, r0, r6
mov pc, lr @ __ret (head.S)
.size __arm720_setup, . - __arm720_setup
/*
* R
* .RVI ZFRS BLDP WCAM
* ..1. 1001 ..11 1101
*
*/
.type arm720_crval, #object
arm720_crval:
crval clear=0x00002f3f, mmuset=0x0000213d, ucset=0x00000130
__INITDATA
/*
* Purpose : Function pointers used to access above functions - all calls
* come through these
*/
.type arm720_processor_functions, #object
ENTRY(arm720_processor_functions)
.word v4t_late_abort
.word legacy_pabort
.word cpu_arm720_proc_init
.word cpu_arm720_proc_fin
.word cpu_arm720_reset
.word cpu_arm720_do_idle
.word cpu_arm720_dcache_clean_area
.word cpu_arm720_switch_mm
.word cpu_arm720_set_pte_ext
.size arm720_processor_functions, . - arm720_processor_functions
.section ".rodata"
.type cpu_arch_name, #object
cpu_arch_name: .asciz "armv4t"
.size cpu_arch_name, . - cpu_arch_name
.type cpu_elf_name, #object
cpu_elf_name: .asciz "v4"
.size cpu_elf_name, . - cpu_elf_name
.type cpu_arm710_name, #object
cpu_arm710_name:
.asciz "ARM710T"
.size cpu_arm710_name, . - cpu_arm710_name
.type cpu_arm720_name, #object
cpu_arm720_name:
.asciz "ARM720T"
.size cpu_arm720_name, . - cpu_arm720_name
.align
/*
* See <asm/procinfo.h> for a definition of this structure.
*/
.section ".proc.info.init", #alloc, #execinstr
.type __arm710_proc_info, #object
__arm710_proc_info:
.long 0x41807100 @ cpu_val
.long 0xffffff00 @ cpu_mask
.long PMD_TYPE_SECT | \
PMD_SECT_BUFFERABLE | \
PMD_SECT_CACHEABLE | \
PMD_BIT4 | \
PMD_SECT_AP_WRITE | \
PMD_SECT_AP_READ
.long PMD_TYPE_SECT | \
PMD_BIT4 | \
PMD_SECT_AP_WRITE | \
PMD_SECT_AP_READ
b __arm710_setup @ cpu_flush
.long cpu_arch_name @ arch_name
.long cpu_elf_name @ elf_name
.long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB @ elf_hwcap
.long cpu_arm710_name @ name
.long arm720_processor_functions
.long v4_tlb_fns
.long v4wt_user_fns
.long v4_cache_fns
.size __arm710_proc_info, . - __arm710_proc_info
.type __arm720_proc_info, #object
__arm720_proc_info:
.long 0x41807200 @ cpu_val
.long 0xffffff00 @ cpu_mask
.long PMD_TYPE_SECT | \
PMD_SECT_BUFFERABLE | \
PMD_SECT_CACHEABLE | \
PMD_BIT4 | \
PMD_SECT_AP_WRITE | \
PMD_SECT_AP_READ
.long PMD_TYPE_SECT | \
PMD_BIT4 | \
PMD_SECT_AP_WRITE | \
PMD_SECT_AP_READ
b __arm720_setup @ cpu_flush
.long cpu_arch_name @ arch_name
.long cpu_elf_name @ elf_name
.long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB @ elf_hwcap
.long cpu_arm720_name @ name
.long arm720_processor_functions
.long v4_tlb_fns
.long v4wt_user_fns
.long v4_cache_fns
.size __arm720_proc_info, . - __arm720_proc_info
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