2005-04-17 06:20:36 +08:00
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/*
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* linux/arch/arm/mm/proc-arm6,7.S
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*
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* Copyright (C) 1997-2000 Russell King
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2006-06-28 21:10:01 +08:00
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* hacked for non-paged-MM by Hyok S. Choi, 2003.
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2005-04-17 06:20:36 +08:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* These are the low level assembler for performing cache and TLB
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* functions on the ARM610 & ARM710.
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*/
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#include <linux/linkage.h>
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#include <linux/init.h>
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#include <asm/assembler.h>
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2005-09-10 03:08:59 +08:00
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#include <asm/asm-offsets.h>
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2006-11-09 22:20:47 +08:00
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#include <asm/elf.h>
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2006-03-16 22:44:36 +08:00
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#include <asm/pgtable-hwdef.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/pgtable.h>
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#include <asm/ptrace.h>
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2008-09-07 00:19:08 +08:00
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#include "proc-macros.S"
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2005-04-17 06:20:36 +08:00
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ENTRY(cpu_arm6_dcache_clean_area)
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ENTRY(cpu_arm7_dcache_clean_area)
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mov pc, lr
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/*
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* Function: arm6_7_data_abort ()
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*
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* Params : r2 = address of aborted instruction
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* : sp = pointer to registers
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*
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* Purpose : obtain information about current aborted instruction
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*
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* Returns : r0 = address of abort
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* : r1 = FSR
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*/
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ENTRY(cpu_arm7_data_abort)
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mrc p15, 0, r1, c5, c0, 0 @ get FSR
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mrc p15, 0, r0, c6, c0, 0 @ get FAR
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ldr r8, [r0] @ read arm instruction
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2005-09-04 17:13:48 +08:00
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tst r8, #1 << 20 @ L = 0 -> write?
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orreq r1, r1, #1 << 11 @ yes.
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2005-04-17 06:20:36 +08:00
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and r7, r8, #15 << 24
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add pc, pc, r7, lsr #22 @ Now branch to the relevant processing routine
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nop
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/* 0 */ b .data_unknown
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/* 1 */ mov pc, lr @ swp
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/* 2 */ b .data_unknown
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/* 3 */ b .data_unknown
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/* 4 */ b .data_arm_lateldrpostconst @ ldr rd, [rn], #m
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/* 5 */ b .data_arm_lateldrpreconst @ ldr rd, [rn, #m]
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/* 6 */ b .data_arm_lateldrpostreg @ ldr rd, [rn], rm
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/* 7 */ b .data_arm_lateldrprereg @ ldr rd, [rn, rm]
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/* 8 */ b .data_arm_ldmstm @ ldm*a rn, <rlist>
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/* 9 */ b .data_arm_ldmstm @ ldm*b rn, <rlist>
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/* a */ b .data_unknown
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/* b */ b .data_unknown
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/* c */ mov pc, lr @ ldc rd, [rn], #m @ Same as ldr rd, [rn], #m
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/* d */ mov pc, lr @ ldc rd, [rn, #m]
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/* e */ b .data_unknown
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/* f */
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.data_unknown: @ Part of jumptable
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mov r0, r2
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mov r1, r8
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mov r2, sp
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bl baddataabort
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b ret_from_exception
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ENTRY(cpu_arm6_data_abort)
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mrc p15, 0, r1, c5, c0, 0 @ get FSR
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mrc p15, 0, r0, c6, c0, 0 @ get FAR
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ldr r8, [r2] @ read arm instruction
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2005-09-04 17:13:48 +08:00
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tst r8, #1 << 20 @ L = 0 -> write?
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orreq r1, r1, #1 << 11 @ yes.
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2005-04-17 06:20:36 +08:00
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and r7, r8, #14 << 24
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teq r7, #8 << 24 @ was it ldm/stm
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movne pc, lr
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.data_arm_ldmstm:
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tst r8, #1 << 21 @ check writeback bit
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moveq pc, lr @ no writeback -> no fixup
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mov r7, #0x11
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orr r7, r7, #0x1100
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and r6, r8, r7
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and r2, r8, r7, lsl #1
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add r6, r6, r2, lsr #1
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and r2, r8, r7, lsl #2
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add r6, r6, r2, lsr #2
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and r2, r8, r7, lsl #3
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add r6, r6, r2, lsr #3
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add r6, r6, r6, lsr #8
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add r6, r6, r6, lsr #4
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and r6, r6, #15 @ r6 = no. of registers to transfer.
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and r5, r8, #15 << 16 @ Extract 'n' from instruction
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ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
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tst r8, #1 << 23 @ Check U bit
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subne r7, r7, r6, lsl #2 @ Undo increment
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addeq r7, r7, r6, lsl #2 @ Undo decrement
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str r7, [sp, r5, lsr #14] @ Put register 'Rn'
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mov pc, lr
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.data_arm_apply_r6_and_rn:
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and r5, r8, #15 << 16 @ Extract 'n' from instruction
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ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
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tst r8, #1 << 23 @ Check U bit
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subne r7, r7, r6 @ Undo incrmenet
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addeq r7, r7, r6 @ Undo decrement
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str r7, [sp, r5, lsr #14] @ Put register 'Rn'
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mov pc, lr
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.data_arm_lateldrpreconst:
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tst r8, #1 << 21 @ check writeback bit
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moveq pc, lr @ no writeback -> no fixup
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.data_arm_lateldrpostconst:
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movs r2, r8, lsl #20 @ Get offset
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moveq pc, lr @ zero -> no fixup
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and r5, r8, #15 << 16 @ Extract 'n' from instruction
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ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
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tst r8, #1 << 23 @ Check U bit
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subne r7, r7, r2, lsr #20 @ Undo increment
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addeq r7, r7, r2, lsr #20 @ Undo decrement
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str r7, [sp, r5, lsr #14] @ Put register 'Rn'
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mov pc, lr
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.data_arm_lateldrprereg:
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tst r8, #1 << 21 @ check writeback bit
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moveq pc, lr @ no writeback -> no fixup
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.data_arm_lateldrpostreg:
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and r7, r8, #15 @ Extract 'm' from instruction
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ldr r6, [sp, r7, lsl #2] @ Get register 'Rm'
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mov r5, r8, lsr #7 @ get shift count
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ands r5, r5, #31
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and r7, r8, #0x70 @ get shift type
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orreq r7, r7, #8 @ shift count = 0
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add pc, pc, r7
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nop
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mov r6, r6, lsl r5 @ 0: LSL #!0
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b .data_arm_apply_r6_and_rn
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b .data_arm_apply_r6_and_rn @ 1: LSL #0
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nop
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b .data_unknown @ 2: MUL?
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nop
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b .data_unknown @ 3: MUL?
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nop
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mov r6, r6, lsr r5 @ 4: LSR #!0
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b .data_arm_apply_r6_and_rn
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mov r6, r6, lsr #32 @ 5: LSR #32
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b .data_arm_apply_r6_and_rn
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b .data_unknown @ 6: MUL?
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nop
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b .data_unknown @ 7: MUL?
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nop
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mov r6, r6, asr r5 @ 8: ASR #!0
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b .data_arm_apply_r6_and_rn
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mov r6, r6, asr #32 @ 9: ASR #32
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b .data_arm_apply_r6_and_rn
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b .data_unknown @ A: MUL?
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nop
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b .data_unknown @ B: MUL?
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nop
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mov r6, r6, ror r5 @ C: ROR #!0
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b .data_arm_apply_r6_and_rn
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mov r6, r6, rrx @ D: RRX
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b .data_arm_apply_r6_and_rn
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b .data_unknown @ E: MUL?
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nop
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b .data_unknown @ F: MUL?
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/*
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* Function: arm6_7_proc_init (void)
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* : arm6_7_proc_fin (void)
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*
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* Notes : This processor does not require these
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*/
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ENTRY(cpu_arm6_proc_init)
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ENTRY(cpu_arm7_proc_init)
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mov pc, lr
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ENTRY(cpu_arm6_proc_fin)
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ENTRY(cpu_arm7_proc_fin)
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mov r0, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
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msr cpsr_c, r0
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mov r0, #0x31 @ ....S..DP...M
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mcr p15, 0, r0, c1, c0, 0 @ disable caches
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mov pc, lr
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ENTRY(cpu_arm6_do_idle)
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ENTRY(cpu_arm7_do_idle)
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mov pc, lr
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/*
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* Function: arm6_7_switch_mm(unsigned long pgd_phys)
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* Params : pgd_phys Physical address of page table
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* Purpose : Perform a task switch, saving the old processes state, and restoring
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* the new.
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*/
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ENTRY(cpu_arm6_switch_mm)
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ENTRY(cpu_arm7_switch_mm)
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2006-06-28 21:10:01 +08:00
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#ifdef CONFIG_MMU
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2005-04-17 06:20:36 +08:00
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mov r1, #0
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mcr p15, 0, r1, c7, c0, 0 @ flush cache
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mcr p15, 0, r0, c2, c0, 0 @ update page table ptr
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mcr p15, 0, r1, c5, c0, 0 @ flush TLBs
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2006-06-28 21:10:01 +08:00
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#endif
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2005-04-17 06:20:36 +08:00
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mov pc, lr
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/*
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2006-12-13 22:34:43 +08:00
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* Function: arm6_7_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext)
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2005-04-17 06:20:36 +08:00
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* Params : r0 = Address to set
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* : r1 = value to set
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* Purpose : Set a PTE and flush it out of any WB cache
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*/
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2008-09-07 00:19:08 +08:00
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.align 5
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2006-12-13 22:34:43 +08:00
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ENTRY(cpu_arm6_set_pte_ext)
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ENTRY(cpu_arm7_set_pte_ext)
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2006-06-28 21:10:01 +08:00
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#ifdef CONFIG_MMU
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2008-09-07 00:19:08 +08:00
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armv3_set_pte_ext wc_disable=0
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2006-06-28 21:10:01 +08:00
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#endif /* CONFIG_MMU */
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2008-09-07 00:19:08 +08:00
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mov pc, lr
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2005-04-17 06:20:36 +08:00
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/*
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* Function: _arm6_7_reset
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* Params : r0 = address to jump to
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* Notes : This sets up everything for a reset
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*/
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ENTRY(cpu_arm6_reset)
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ENTRY(cpu_arm7_reset)
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mov r1, #0
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mcr p15, 0, r1, c7, c0, 0 @ flush cache
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2006-06-28 21:10:01 +08:00
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#ifdef CONFIG_MMU
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2005-04-17 06:20:36 +08:00
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mcr p15, 0, r1, c5, c0, 0 @ flush TLB
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2006-06-28 21:10:01 +08:00
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#endif
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2005-04-17 06:20:36 +08:00
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mov r1, #0x30
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mcr p15, 0, r1, c1, c0, 0 @ turn off MMU etc
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mov pc, r0
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__INIT
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.type __arm6_setup, #function
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__arm6_setup: mov r0, #0
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mcr p15, 0, r0, c7, c0 @ flush caches on v3
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2006-06-28 21:10:01 +08:00
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#ifdef CONFIG_MMU
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2005-04-17 06:20:36 +08:00
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mcr p15, 0, r0, c5, c0 @ flush TLBs on v3
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mov r0, #0x3d @ . ..RS BLDP WCAM
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orr r0, r0, #0x100 @ . ..01 0011 1101
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2006-06-28 21:10:01 +08:00
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#else
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mov r0, #0x3c @ . ..RS BLDP WCA.
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#endif
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2005-04-17 06:20:36 +08:00
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mov pc, lr
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.size __arm6_setup, . - __arm6_setup
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.type __arm7_setup, #function
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__arm7_setup: mov r0, #0
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mcr p15, 0, r0, c7, c0 @ flush caches on v3
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2006-06-28 21:10:01 +08:00
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#ifdef CONFIG_MMU
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2005-04-17 06:20:36 +08:00
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mcr p15, 0, r0, c5, c0 @ flush TLBs on v3
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mcr p15, 0, r0, c3, c0 @ load domain access register
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mov r0, #0x7d @ . ..RS BLDP WCAM
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orr r0, r0, #0x100 @ . ..01 0111 1101
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2006-06-28 21:10:01 +08:00
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#else
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mov r0, #0x7c @ . ..RS BLDP WCA.
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#endif
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2005-04-17 06:20:36 +08:00
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mov pc, lr
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.size __arm7_setup, . - __arm7_setup
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__INITDATA
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/*
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* Purpose : Function pointers used to access above functions - all calls
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* come through these
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*/
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.type arm6_processor_functions, #object
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ENTRY(arm6_processor_functions)
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.word cpu_arm6_data_abort
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2008-04-22 01:42:04 +08:00
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.word pabort_noifar
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2005-04-17 06:20:36 +08:00
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.word cpu_arm6_proc_init
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.word cpu_arm6_proc_fin
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.word cpu_arm6_reset
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.word cpu_arm6_do_idle
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.word cpu_arm6_dcache_clean_area
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.word cpu_arm6_switch_mm
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2006-12-13 22:34:43 +08:00
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.word cpu_arm6_set_pte_ext
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2005-04-17 06:20:36 +08:00
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.size arm6_processor_functions, . - arm6_processor_functions
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/*
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* Purpose : Function pointers used to access above functions - all calls
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* come through these
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*/
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.type arm7_processor_functions, #object
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ENTRY(arm7_processor_functions)
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.word cpu_arm7_data_abort
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2008-04-22 01:42:04 +08:00
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.word pabort_noifar
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2005-04-17 06:20:36 +08:00
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.word cpu_arm7_proc_init
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.word cpu_arm7_proc_fin
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.word cpu_arm7_reset
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.word cpu_arm7_do_idle
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.word cpu_arm7_dcache_clean_area
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.word cpu_arm7_switch_mm
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2006-12-13 22:34:43 +08:00
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.word cpu_arm7_set_pte_ext
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2005-04-17 06:20:36 +08:00
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.size arm7_processor_functions, . - arm7_processor_functions
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.section ".rodata"
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.type cpu_arch_name, #object
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cpu_arch_name: .asciz "armv3"
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.size cpu_arch_name, . - cpu_arch_name
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.type cpu_elf_name, #object
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cpu_elf_name: .asciz "v3"
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.size cpu_elf_name, . - cpu_elf_name
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.type cpu_arm6_name, #object
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cpu_arm6_name: .asciz "ARM6"
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.size cpu_arm6_name, . - cpu_arm6_name
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.type cpu_arm610_name, #object
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cpu_arm610_name:
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.asciz "ARM610"
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.size cpu_arm610_name, . - cpu_arm610_name
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.type cpu_arm7_name, #object
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cpu_arm7_name: .asciz "ARM7"
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.size cpu_arm7_name, . - cpu_arm7_name
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.type cpu_arm710_name, #object
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cpu_arm710_name:
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.asciz "ARM710"
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.size cpu_arm710_name, . - cpu_arm710_name
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.align
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2005-09-20 23:35:03 +08:00
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.section ".proc.info.init", #alloc, #execinstr
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2005-04-17 06:20:36 +08:00
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.type __arm6_proc_info, #object
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__arm6_proc_info:
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.long 0x41560600
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.long 0xfffffff0
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.long 0x00000c1e
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2006-06-30 01:24:21 +08:00
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.long PMD_TYPE_SECT | \
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PMD_BIT4 | \
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PMD_SECT_AP_WRITE | \
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PMD_SECT_AP_READ
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2005-04-17 06:20:36 +08:00
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b __arm6_setup
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.long cpu_arch_name
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.long cpu_elf_name
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.long HWCAP_SWP | HWCAP_26BIT
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.long cpu_arm6_name
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.long arm6_processor_functions
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.long v3_tlb_fns
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.long v3_user_fns
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.long v3_cache_fns
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.size __arm6_proc_info, . - __arm6_proc_info
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.type __arm610_proc_info, #object
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__arm610_proc_info:
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.long 0x41560610
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.long 0xfffffff0
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.long 0x00000c1e
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2006-06-30 01:24:21 +08:00
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.long PMD_TYPE_SECT | \
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PMD_BIT4 | \
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PMD_SECT_AP_WRITE | \
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PMD_SECT_AP_READ
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2005-04-17 06:20:36 +08:00
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b __arm6_setup
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.long cpu_arch_name
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.long cpu_elf_name
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.long HWCAP_SWP | HWCAP_26BIT
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.long cpu_arm610_name
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.long arm6_processor_functions
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.long v3_tlb_fns
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.long v3_user_fns
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.long v3_cache_fns
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.size __arm610_proc_info, . - __arm610_proc_info
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.type __arm7_proc_info, #object
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__arm7_proc_info:
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.long 0x41007000
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.long 0xffffff00
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.long 0x00000c1e
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2006-06-30 01:24:21 +08:00
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.long PMD_TYPE_SECT | \
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PMD_BIT4 | \
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PMD_SECT_AP_WRITE | \
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PMD_SECT_AP_READ
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2005-04-17 06:20:36 +08:00
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b __arm7_setup
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.long cpu_arch_name
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.long cpu_elf_name
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.long HWCAP_SWP | HWCAP_26BIT
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.long cpu_arm7_name
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.long arm7_processor_functions
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.long v3_tlb_fns
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.long v3_user_fns
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.long v3_cache_fns
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.size __arm7_proc_info, . - __arm7_proc_info
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.type __arm710_proc_info, #object
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__arm710_proc_info:
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.long 0x41007100
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.long 0xfff8ff00
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.long PMD_TYPE_SECT | \
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PMD_SECT_BUFFERABLE | \
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PMD_SECT_CACHEABLE | \
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PMD_BIT4 | \
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PMD_SECT_AP_WRITE | \
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PMD_SECT_AP_READ
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2006-06-30 01:24:21 +08:00
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.long PMD_TYPE_SECT | \
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PMD_BIT4 | \
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PMD_SECT_AP_WRITE | \
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PMD_SECT_AP_READ
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2005-04-17 06:20:36 +08:00
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b __arm7_setup
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.long cpu_arch_name
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.long cpu_elf_name
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.long HWCAP_SWP | HWCAP_26BIT
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.long cpu_arm710_name
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.long arm7_processor_functions
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.long v3_tlb_fns
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.long v3_user_fns
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.long v3_cache_fns
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.size __arm710_proc_info, . - __arm710_proc_info
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