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ARC: entry: move ARCompact specific bits out of entry.h 

- PUSHAUX/POPAUX helpers to ARCompact entry
 - use gas provided "push"/pop pseudo instructions

Signed-off-by: Vineet Gupta <vgupta@kernel.org>
This commit is contained in:
Vineet Gupta 2020-05-20 11:23:21 -07:00
parent 9de7fc30f2
commit 3a02ec2f0b
2 changed files with 54 additions and 67 deletions
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55
arch/arc/include/asm/entry-compact.h
View File

@ -33,6 +33,59 @@
#include <asm/irqflags-compact.h>
#include <asm/thread_info.h> /* For THREAD_SIZE */
/* Note on the LD/ST addr modes with addr reg wback
*
* LD.a same as LD.aw
*
* LD.a reg1, [reg2, x] => Pre Incr
* Eff Addr for load = [reg2 + x]
*
* LD.ab reg1, [reg2, x] => Post Incr
* Eff Addr for load = [reg2]
*/
.macro PUSHAX aux
lr r9, [\aux]
push r9
.endm
.macro POPAX aux
pop r9
sr r9, [\aux]
.endm
.macro SAVE_R0_TO_R12
push r0
push r1
push r2
push r3
push r4
push r5
push r6
push r7
push r8
push r9
push r10
push r11
push r12
.endm
.macro RESTORE_R12_TO_R0
pop r12
pop r11
pop r10
pop r9
pop r8
pop r7
pop r6
pop r5
pop r4
pop r3
pop r2
pop r1
pop r0
.endm
.macro SAVE_ABI_CALLEE_REGS
push r13
push r14
@ -267,7 +320,7 @@
SWITCH_TO_KERNEL_STK
PUSH 0x003\LVL\()abcd /* Dummy ECR */
st.a 0x003\LVL\()abcd, [sp, -4] /* Dummy ECR */
sub sp, sp, 8 /* skip orig_r0 (not needed)
skip pt_regs->sp, already saved above */

66
arch/arc/include/asm/entry.h
View File

@ -21,72 +21,6 @@
#include <asm/entry-arcv2.h>
#endif
/* Note on the LD/ST addr modes with addr reg wback
*
* LD.a same as LD.aw
*
* LD.a reg1, [reg2, x] => Pre Incr
* Eff Addr for load = [reg2 + x]
*
* LD.ab reg1, [reg2, x] => Post Incr
* Eff Addr for load = [reg2]
*/
.macro PUSH reg
st.a \reg, [sp, -4]
.endm
.macro PUSHAX aux
lr r9, [\aux]
PUSH r9
.endm
.macro POP reg
ld.ab \reg, [sp, 4]
.endm
.macro POPAX aux
POP r9
sr r9, [\aux]
.endm
/*--------------------------------------------------------------
* Helpers to save/restore Scratch Regs:
* used by Interrupt/Exception Prologue/Epilogue
*-------------------------------------------------------------*/
.macro SAVE_R0_TO_R12
PUSH r0
PUSH r1
PUSH r2
PUSH r3
PUSH r4
PUSH r5
PUSH r6
PUSH r7
PUSH r8
PUSH r9
PUSH r10
PUSH r11
PUSH r12
.endm
.macro RESTORE_R12_TO_R0
POP r12
POP r11
POP r10
POP r9
POP r8
POP r7
POP r6
POP r5
POP r4
POP r3
POP r2
POP r1
POP r0
.endm
/*
* save user mode callee regs as struct callee_regs
* - needed by fork/do_signal/unaligned-access-emulation.