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author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-06-27 09:52:54 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-07-02 10:56:11 +0100 |
commit | e22c12f9146d50ee6b0cf97db46b3310409f64e6 (patch) | |
tree | 986b832e871dc9703d3b318fbf7c59f21f5c6a85 /arch/arm/mm/abort-lv4t.S | |
parent | da7404725781bc7c736e10cae5521e5604e222a5 (diff) | |
download | kernel_goldelico_gta04-e22c12f9146d50ee6b0cf97db46b3310409f64e6.zip kernel_goldelico_gta04-e22c12f9146d50ee6b0cf97db46b3310409f64e6.tar.gz kernel_goldelico_gta04-e22c12f9146d50ee6b0cf97db46b3310409f64e6.tar.bz2 |
ARM: entry: data abort: use r2 as base of pt_regs rather than stack
Now that we pass r2 into these helper functions as the pointer to
pt_regs, use r2 as the base of the registers on the stack rather
than using the stack pointer directly.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/abort-lv4t.S')
-rw-r--r-- | arch/arm/mm/abort-lv4t.S | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/arm/mm/abort-lv4t.S b/arch/arm/mm/abort-lv4t.S index d432f31..921aaab 100644 --- a/arch/arm/mm/abort-lv4t.S +++ b/arch/arm/mm/abort-lv4t.S @@ -73,11 +73,11 @@ ENTRY(v4t_late_abort) 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' + ldr r7, [r2, 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' + str r7, [r2, r5, lsr #14] @ Put register 'Rn' b do_DataAbort .data_arm_lateldrhpre: @@ -88,14 +88,14 @@ ENTRY(v4t_late_abort) tst r8, #1 << 22 @ if (immediate offset) andne r6, r8, #0xf00 @ { immediate high nibble orrne r6, r5, r6, lsr #4 @ combine nibbles } else - ldreq r6, [sp, r5, lsl #2] @ { load Rm value } + ldreq r6, [r2, r5, lsl #2] @ { load Rm value } .data_arm_apply_r6_and_rn: and r5, r8, #15 << 16 @ Extract 'n' from instruction - ldr r7, [sp, r5, lsr #14] @ Get register 'Rn' + ldr r7, [r2, 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' + str r7, [r2, r5, lsr #14] @ Put register 'Rn' b do_DataAbort .data_arm_lateldrpreconst: @@ -105,11 +105,11 @@ ENTRY(v4t_late_abort) movs r9, r8, lsl #20 @ Get offset beq do_DataAbort @ zero -> no fixup and r5, r8, #15 << 16 @ Extract 'n' from instruction - ldr r7, [sp, r5, lsr #14] @ Get register 'Rn' + ldr r7, [r2, r5, lsr #14] @ Get register 'Rn' tst r8, #1 << 23 @ Check U bit subne r7, r7, r9, lsr #20 @ Undo increment addeq r7, r7, r9, lsr #20 @ Undo decrement - str r7, [sp, r5, lsr #14] @ Put register 'Rn' + str r7, [r2, r5, lsr #14] @ Put register 'Rn' b do_DataAbort .data_arm_lateldrprereg: @@ -117,7 +117,7 @@ ENTRY(v4t_late_abort) beq do_DataAbort @ no writeback -> no fixup .data_arm_lateldrpostreg: and r7, r8, #15 @ Extract 'm' from instruction - ldr r6, [sp, r7, lsl #2] @ Get register 'Rm' + ldr r6, [r2, 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 @@ -201,11 +201,11 @@ ENTRY(v4t_late_abort) movs r7, r8, lsr #9 @ C = r8 bit 8 (R bit) adc r6, r6, r6, lsr #4 @ high + low nibble + R bit and r6, r6, #15 @ number of regs to transfer - ldr r7, [sp, #13 << 2] + ldr r7, [r2, #13 << 2] tst r8, #1 << 11 addeq r7, r7, r6, lsl #2 @ increment SP if PUSH subne r7, r7, r6, lsl #2 @ decrement SP if POP - str r7, [sp, #13 << 2] + str r7, [r2, #13 << 2] b do_DataAbort .data_thumb_ldmstm: @@ -217,8 +217,8 @@ ENTRY(v4t_late_abort) add r6, r6, r9, lsr #2 add r6, r6, r6, lsr #4 and r5, r8, #7 << 8 - ldr r7, [sp, r5, lsr #6] + ldr r7, [r2, r5, lsr #6] and r6, r6, #15 @ number of regs to transfer sub r7, r7, r6, lsl #2 @ always decrement - str r7, [sp, r5, lsr #6] + str r7, [r2, r5, lsr #6] b do_DataAbort |