2005-04-16 18:20:36 -04:00
|
|
|
/*
|
|
|
|
* linux/arch/arm/mm/proc-arm6,7.S
|
|
|
|
*
|
|
|
|
* Copyright (C) 1997-2000 Russell King
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* These are the low level assembler for performing cache and TLB
|
|
|
|
* functions on the ARM610 & ARM710.
|
|
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/assembler.h>
|
2005-09-09 15:08:59 -04:00
|
|
|
#include <asm/asm-offsets.h>
|
2006-03-16 09:44:36 -05:00
|
|
|
#include <asm/pgtable-hwdef.h>
|
2005-04-16 18:20:36 -04:00
|
|
|
#include <asm/pgtable.h>
|
|
|
|
#include <asm/procinfo.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
|
|
|
|
ENTRY(cpu_arm6_dcache_clean_area)
|
|
|
|
ENTRY(cpu_arm7_dcache_clean_area)
|
|
|
|
mov pc, lr
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function: arm6_7_data_abort ()
|
|
|
|
*
|
|
|
|
* Params : r2 = address of aborted instruction
|
|
|
|
* : sp = pointer to registers
|
|
|
|
*
|
|
|
|
* Purpose : obtain information about current aborted instruction
|
|
|
|
*
|
|
|
|
* Returns : r0 = address of abort
|
|
|
|
* : r1 = FSR
|
|
|
|
*/
|
|
|
|
|
|
|
|
ENTRY(cpu_arm7_data_abort)
|
|
|
|
mrc p15, 0, r1, c5, c0, 0 @ get FSR
|
|
|
|
mrc p15, 0, r0, c6, c0, 0 @ get FAR
|
|
|
|
ldr r8, [r0] @ read arm instruction
|
2005-09-04 05:13:48 -04:00
|
|
|
tst r8, #1 << 20 @ L = 0 -> write?
|
|
|
|
orreq r1, r1, #1 << 11 @ yes.
|
2005-04-16 18:20:36 -04:00
|
|
|
and r7, r8, #15 << 24
|
|
|
|
add pc, pc, r7, lsr #22 @ Now branch to the relevant processing routine
|
|
|
|
nop
|
|
|
|
|
|
|
|
/* 0 */ b .data_unknown
|
|
|
|
/* 1 */ mov pc, lr @ swp
|
|
|
|
/* 2 */ b .data_unknown
|
|
|
|
/* 3 */ b .data_unknown
|
|
|
|
/* 4 */ b .data_arm_lateldrpostconst @ ldr rd, [rn], #m
|
|
|
|
/* 5 */ b .data_arm_lateldrpreconst @ ldr rd, [rn, #m]
|
|
|
|
/* 6 */ b .data_arm_lateldrpostreg @ ldr rd, [rn], rm
|
|
|
|
/* 7 */ b .data_arm_lateldrprereg @ ldr rd, [rn, rm]
|
|
|
|
/* 8 */ b .data_arm_ldmstm @ ldm*a rn, <rlist>
|
|
|
|
/* 9 */ b .data_arm_ldmstm @ ldm*b rn, <rlist>
|
|
|
|
/* a */ b .data_unknown
|
|
|
|
/* b */ b .data_unknown
|
|
|
|
/* c */ mov pc, lr @ ldc rd, [rn], #m @ Same as ldr rd, [rn], #m
|
|
|
|
/* d */ mov pc, lr @ ldc rd, [rn, #m]
|
|
|
|
/* e */ b .data_unknown
|
|
|
|
/* f */
|
|
|
|
.data_unknown: @ Part of jumptable
|
|
|
|
mov r0, r2
|
|
|
|
mov r1, r8
|
|
|
|
mov r2, sp
|
|
|
|
bl baddataabort
|
|
|
|
b ret_from_exception
|
|
|
|
|
|
|
|
ENTRY(cpu_arm6_data_abort)
|
|
|
|
mrc p15, 0, r1, c5, c0, 0 @ get FSR
|
|
|
|
mrc p15, 0, r0, c6, c0, 0 @ get FAR
|
|
|
|
ldr r8, [r2] @ read arm instruction
|
2005-09-04 05:13:48 -04:00
|
|
|
tst r8, #1 << 20 @ L = 0 -> write?
|
|
|
|
orreq r1, r1, #1 << 11 @ yes.
|
2005-04-16 18:20:36 -04:00
|
|
|
and r7, r8, #14 << 24
|
|
|
|
teq r7, #8 << 24 @ was it ldm/stm
|
|
|
|
movne pc, lr
|
|
|
|
|
|
|
|
.data_arm_ldmstm:
|
|
|
|
tst r8, #1 << 21 @ check writeback bit
|
|
|
|
moveq pc, lr @ no writeback -> no fixup
|
|
|
|
mov r7, #0x11
|
|
|
|
orr r7, r7, #0x1100
|
|
|
|
and r6, r8, r7
|
|
|
|
and r2, r8, r7, lsl #1
|
|
|
|
add r6, r6, r2, lsr #1
|
|
|
|
and r2, r8, r7, lsl #2
|
|
|
|
add r6, r6, r2, lsr #2
|
|
|
|
and r2, r8, r7, lsl #3
|
|
|
|
add r6, r6, r2, lsr #3
|
|
|
|
add r6, r6, r6, lsr #8
|
|
|
|
add r6, r6, r6, lsr #4
|
|
|
|
and r6, r6, #15 @ r6 = no. of registers to transfer.
|
|
|
|
and r5, r8, #15 << 16 @ Extract 'n' from instruction
|
|
|
|
ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
|
|
|
|
tst r8, #1 << 23 @ Check U bit
|
|
|
|
subne r7, r7, r6, lsl #2 @ Undo increment
|
|
|
|
addeq r7, r7, r6, lsl #2 @ Undo decrement
|
|
|
|
str r7, [sp, r5, lsr #14] @ Put register 'Rn'
|
|
|
|
mov pc, lr
|
|
|
|
|
|
|
|
.data_arm_apply_r6_and_rn:
|
|
|
|
and r5, r8, #15 << 16 @ Extract 'n' from instruction
|
|
|
|
ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
|
|
|
|
tst r8, #1 << 23 @ Check U bit
|
|
|
|
subne r7, r7, r6 @ Undo incrmenet
|
|
|
|
addeq r7, r7, r6 @ Undo decrement
|
|
|
|
str r7, [sp, r5, lsr #14] @ Put register 'Rn'
|
|
|
|
mov pc, lr
|
|
|
|
|
|
|
|
.data_arm_lateldrpreconst:
|
|
|
|
tst r8, #1 << 21 @ check writeback bit
|
|
|
|
moveq pc, lr @ no writeback -> no fixup
|
|
|
|
.data_arm_lateldrpostconst:
|
|
|
|
movs r2, r8, lsl #20 @ Get offset
|
|
|
|
moveq pc, lr @ zero -> no fixup
|
|
|
|
and r5, r8, #15 << 16 @ Extract 'n' from instruction
|
|
|
|
ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
|
|
|
|
tst r8, #1 << 23 @ Check U bit
|
|
|
|
subne r7, r7, r2, lsr #20 @ Undo increment
|
|
|
|
addeq r7, r7, r2, lsr #20 @ Undo decrement
|
|
|
|
str r7, [sp, r5, lsr #14] @ Put register 'Rn'
|
|
|
|
mov pc, lr
|
|
|
|
|
|
|
|
.data_arm_lateldrprereg:
|
|
|
|
tst r8, #1 << 21 @ check writeback bit
|
|
|
|
moveq pc, lr @ no writeback -> no fixup
|
|
|
|
.data_arm_lateldrpostreg:
|
|
|
|
and r7, r8, #15 @ Extract 'm' from instruction
|
|
|
|
ldr r6, [sp, r7, lsl #2] @ Get register 'Rm'
|
|
|
|
mov r5, r8, lsr #7 @ get shift count
|
|
|
|
ands r5, r5, #31
|
|
|
|
and r7, r8, #0x70 @ get shift type
|
|
|
|
orreq r7, r7, #8 @ shift count = 0
|
|
|
|
add pc, pc, r7
|
|
|
|
nop
|
|
|
|
|
|
|
|
mov r6, r6, lsl r5 @ 0: LSL #!0
|
|
|
|
b .data_arm_apply_r6_and_rn
|
|
|
|
b .data_arm_apply_r6_and_rn @ 1: LSL #0
|
|
|
|
nop
|
|
|
|
b .data_unknown @ 2: MUL?
|
|
|
|
nop
|
|
|
|
b .data_unknown @ 3: MUL?
|
|
|
|
nop
|
|
|
|
mov r6, r6, lsr r5 @ 4: LSR #!0
|
|
|
|
b .data_arm_apply_r6_and_rn
|
|
|
|
mov r6, r6, lsr #32 @ 5: LSR #32
|
|
|
|
b .data_arm_apply_r6_and_rn
|
|
|
|
b .data_unknown @ 6: MUL?
|
|
|
|
nop
|
|
|
|
b .data_unknown @ 7: MUL?
|
|
|
|
nop
|
|
|
|
mov r6, r6, asr r5 @ 8: ASR #!0
|
|
|
|
b .data_arm_apply_r6_and_rn
|
|
|
|
mov r6, r6, asr #32 @ 9: ASR #32
|
|
|
|
b .data_arm_apply_r6_and_rn
|
|
|
|
b .data_unknown @ A: MUL?
|
|
|
|
nop
|
|
|
|
b .data_unknown @ B: MUL?
|
|
|
|
nop
|
|
|
|
mov r6, r6, ror r5 @ C: ROR #!0
|
|
|
|
b .data_arm_apply_r6_and_rn
|
|
|
|
mov r6, r6, rrx @ D: RRX
|
|
|
|
b .data_arm_apply_r6_and_rn
|
|
|
|
b .data_unknown @ E: MUL?
|
|
|
|
nop
|
|
|
|
b .data_unknown @ F: MUL?
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function: arm6_7_proc_init (void)
|
|
|
|
* : arm6_7_proc_fin (void)
|
|
|
|
*
|
|
|
|
* Notes : This processor does not require these
|
|
|
|
*/
|
|
|
|
ENTRY(cpu_arm6_proc_init)
|
|
|
|
ENTRY(cpu_arm7_proc_init)
|
|
|
|
mov pc, lr
|
|
|
|
|
|
|
|
ENTRY(cpu_arm6_proc_fin)
|
|
|
|
ENTRY(cpu_arm7_proc_fin)
|
|
|
|
mov r0, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
|
|
|
|
msr cpsr_c, r0
|
|
|
|
mov r0, #0x31 @ ....S..DP...M
|
|
|
|
mcr p15, 0, r0, c1, c0, 0 @ disable caches
|
|
|
|
mov pc, lr
|
|
|
|
|
|
|
|
ENTRY(cpu_arm6_do_idle)
|
|
|
|
ENTRY(cpu_arm7_do_idle)
|
|
|
|
mov pc, lr
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function: arm6_7_switch_mm(unsigned long pgd_phys)
|
|
|
|
* Params : pgd_phys Physical address of page table
|
|
|
|
* Purpose : Perform a task switch, saving the old processes state, and restoring
|
|
|
|
* the new.
|
|
|
|
*/
|
|
|
|
ENTRY(cpu_arm6_switch_mm)
|
|
|
|
ENTRY(cpu_arm7_switch_mm)
|
|
|
|
mov r1, #0
|
|
|
|
mcr p15, 0, r1, c7, c0, 0 @ flush cache
|
|
|
|
mcr p15, 0, r0, c2, c0, 0 @ update page table ptr
|
|
|
|
mcr p15, 0, r1, c5, c0, 0 @ flush TLBs
|
|
|
|
mov pc, lr
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function: arm6_7_set_pte(pte_t *ptep, pte_t pte)
|
|
|
|
* 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_arm6_set_pte)
|
|
|
|
ENTRY(cpu_arm7_set_pte)
|
|
|
|
str r1, [r0], #-2048 @ linux version
|
|
|
|
|
|
|
|
eor r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
|
|
|
|
|
|
|
|
bic r2, r1, #PTE_SMALL_AP_MASK
|
|
|
|
bic r2, r2, #PTE_TYPE_MASK
|
|
|
|
orr r2, r2, #PTE_TYPE_SMALL
|
|
|
|
|
|
|
|
tst r1, #L_PTE_USER @ User?
|
|
|
|
orrne r2, r2, #PTE_SMALL_AP_URO_SRW
|
|
|
|
|
|
|
|
tst r1, #L_PTE_WRITE | L_PTE_DIRTY @ Write and Dirty?
|
|
|
|
orreq r2, r2, #PTE_SMALL_AP_UNO_SRW
|
|
|
|
|
|
|
|
tst r1, #L_PTE_PRESENT | L_PTE_YOUNG @ Present and Young
|
|
|
|
movne r2, #0
|
|
|
|
|
|
|
|
str r2, [r0] @ hardware version
|
|
|
|
mov pc, lr
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function: _arm6_7_reset
|
|
|
|
* Params : r0 = address to jump to
|
|
|
|
* Notes : This sets up everything for a reset
|
|
|
|
*/
|
|
|
|
ENTRY(cpu_arm6_reset)
|
|
|
|
ENTRY(cpu_arm7_reset)
|
|
|
|
mov r1, #0
|
|
|
|
mcr p15, 0, r1, c7, c0, 0 @ flush cache
|
|
|
|
mcr p15, 0, r1, c5, c0, 0 @ flush TLB
|
|
|
|
mov r1, #0x30
|
|
|
|
mcr p15, 0, r1, c1, c0, 0 @ turn off MMU etc
|
|
|
|
mov pc, r0
|
|
|
|
|
|
|
|
__INIT
|
|
|
|
|
|
|
|
.type __arm6_setup, #function
|
|
|
|
__arm6_setup: mov r0, #0
|
|
|
|
mcr p15, 0, r0, c7, c0 @ flush caches on v3
|
|
|
|
mcr p15, 0, r0, c5, c0 @ flush TLBs on v3
|
|
|
|
mov r0, #0x3d @ . ..RS BLDP WCAM
|
|
|
|
orr r0, r0, #0x100 @ . ..01 0011 1101
|
|
|
|
mov pc, lr
|
|
|
|
.size __arm6_setup, . - __arm6_setup
|
|
|
|
|
|
|
|
.type __arm7_setup, #function
|
|
|
|
__arm7_setup: mov r0, #0
|
|
|
|
mcr p15, 0, r0, c7, c0 @ flush caches on v3
|
|
|
|
mcr p15, 0, r0, c5, c0 @ flush TLBs on v3
|
|
|
|
mcr p15, 0, r0, c3, c0 @ load domain access register
|
|
|
|
mov r0, #0x7d @ . ..RS BLDP WCAM
|
|
|
|
orr r0, r0, #0x100 @ . ..01 0111 1101
|
|
|
|
mov pc, lr
|
|
|
|
.size __arm7_setup, . - __arm7_setup
|
|
|
|
|
|
|
|
__INITDATA
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Purpose : Function pointers used to access above functions - all calls
|
|
|
|
* come through these
|
|
|
|
*/
|
|
|
|
.type arm6_processor_functions, #object
|
|
|
|
ENTRY(arm6_processor_functions)
|
|
|
|
.word cpu_arm6_data_abort
|
|
|
|
.word cpu_arm6_proc_init
|
|
|
|
.word cpu_arm6_proc_fin
|
|
|
|
.word cpu_arm6_reset
|
|
|
|
.word cpu_arm6_do_idle
|
|
|
|
.word cpu_arm6_dcache_clean_area
|
|
|
|
.word cpu_arm6_switch_mm
|
|
|
|
.word cpu_arm6_set_pte
|
|
|
|
.size arm6_processor_functions, . - arm6_processor_functions
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Purpose : Function pointers used to access above functions - all calls
|
|
|
|
* come through these
|
|
|
|
*/
|
|
|
|
.type arm7_processor_functions, #object
|
|
|
|
ENTRY(arm7_processor_functions)
|
|
|
|
.word cpu_arm7_data_abort
|
|
|
|
.word cpu_arm7_proc_init
|
|
|
|
.word cpu_arm7_proc_fin
|
|
|
|
.word cpu_arm7_reset
|
|
|
|
.word cpu_arm7_do_idle
|
|
|
|
.word cpu_arm7_dcache_clean_area
|
|
|
|
.word cpu_arm7_switch_mm
|
|
|
|
.word cpu_arm7_set_pte
|
|
|
|
.size arm7_processor_functions, . - arm7_processor_functions
|
|
|
|
|
|
|
|
.section ".rodata"
|
|
|
|
|
|
|
|
.type cpu_arch_name, #object
|
|
|
|
cpu_arch_name: .asciz "armv3"
|
|
|
|
.size cpu_arch_name, . - cpu_arch_name
|
|
|
|
|
|
|
|
.type cpu_elf_name, #object
|
|
|
|
cpu_elf_name: .asciz "v3"
|
|
|
|
.size cpu_elf_name, . - cpu_elf_name
|
|
|
|
|
|
|
|
.type cpu_arm6_name, #object
|
|
|
|
cpu_arm6_name: .asciz "ARM6"
|
|
|
|
.size cpu_arm6_name, . - cpu_arm6_name
|
|
|
|
|
|
|
|
.type cpu_arm610_name, #object
|
|
|
|
cpu_arm610_name:
|
|
|
|
.asciz "ARM610"
|
|
|
|
.size cpu_arm610_name, . - cpu_arm610_name
|
|
|
|
|
|
|
|
.type cpu_arm7_name, #object
|
|
|
|
cpu_arm7_name: .asciz "ARM7"
|
|
|
|
.size cpu_arm7_name, . - cpu_arm7_name
|
|
|
|
|
|
|
|
.type cpu_arm710_name, #object
|
|
|
|
cpu_arm710_name:
|
|
|
|
.asciz "ARM710"
|
|
|
|
.size cpu_arm710_name, . - cpu_arm710_name
|
|
|
|
|
|
|
|
.align
|
|
|
|
|
2005-09-20 11:35:03 -04:00
|
|
|
.section ".proc.info.init", #alloc, #execinstr
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
.type __arm6_proc_info, #object
|
|
|
|
__arm6_proc_info:
|
|
|
|
.long 0x41560600
|
|
|
|
.long 0xfffffff0
|
|
|
|
.long 0x00000c1e
|
|
|
|
b __arm6_setup
|
|
|
|
.long cpu_arch_name
|
|
|
|
.long cpu_elf_name
|
|
|
|
.long HWCAP_SWP | HWCAP_26BIT
|
|
|
|
.long cpu_arm6_name
|
|
|
|
.long arm6_processor_functions
|
|
|
|
.long v3_tlb_fns
|
|
|
|
.long v3_user_fns
|
|
|
|
.long v3_cache_fns
|
|
|
|
.size __arm6_proc_info, . - __arm6_proc_info
|
|
|
|
|
|
|
|
.type __arm610_proc_info, #object
|
|
|
|
__arm610_proc_info:
|
|
|
|
.long 0x41560610
|
|
|
|
.long 0xfffffff0
|
|
|
|
.long 0x00000c1e
|
|
|
|
b __arm6_setup
|
|
|
|
.long cpu_arch_name
|
|
|
|
.long cpu_elf_name
|
|
|
|
.long HWCAP_SWP | HWCAP_26BIT
|
|
|
|
.long cpu_arm610_name
|
|
|
|
.long arm6_processor_functions
|
|
|
|
.long v3_tlb_fns
|
|
|
|
.long v3_user_fns
|
|
|
|
.long v3_cache_fns
|
|
|
|
.size __arm610_proc_info, . - __arm610_proc_info
|
|
|
|
|
|
|
|
.type __arm7_proc_info, #object
|
|
|
|
__arm7_proc_info:
|
|
|
|
.long 0x41007000
|
|
|
|
.long 0xffffff00
|
|
|
|
.long 0x00000c1e
|
|
|
|
b __arm7_setup
|
|
|
|
.long cpu_arch_name
|
|
|
|
.long cpu_elf_name
|
|
|
|
.long HWCAP_SWP | HWCAP_26BIT
|
|
|
|
.long cpu_arm7_name
|
|
|
|
.long arm7_processor_functions
|
|
|
|
.long v3_tlb_fns
|
|
|
|
.long v3_user_fns
|
|
|
|
.long v3_cache_fns
|
|
|
|
.size __arm7_proc_info, . - __arm7_proc_info
|
|
|
|
|
|
|
|
.type __arm710_proc_info, #object
|
|
|
|
__arm710_proc_info:
|
|
|
|
.long 0x41007100
|
|
|
|
.long 0xfff8ff00
|
|
|
|
.long PMD_TYPE_SECT | \
|
|
|
|
PMD_SECT_BUFFERABLE | \
|
|
|
|
PMD_SECT_CACHEABLE | \
|
|
|
|
PMD_BIT4 | \
|
|
|
|
PMD_SECT_AP_WRITE | \
|
|
|
|
PMD_SECT_AP_READ
|
|
|
|
b __arm7_setup
|
|
|
|
.long cpu_arch_name
|
|
|
|
.long cpu_elf_name
|
|
|
|
.long HWCAP_SWP | HWCAP_26BIT
|
|
|
|
.long cpu_arm710_name
|
|
|
|
.long arm7_processor_functions
|
|
|
|
.long v3_tlb_fns
|
|
|
|
.long v3_user_fns
|
|
|
|
.long v3_cache_fns
|
|
|
|
.size __arm710_proc_info, . - __arm710_proc_info
|