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arch: arc: optimize the push and pop of fast irq #14550

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Merged
merged 1 commit into from
Apr 19, 2019
Merged

arch: arc: optimize the push and pop of fast irq #14550

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31 changes: 1 addition & 30 deletions arch/arc/core/fast_irq.S
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Original file line number Diff line number Diff line change
Expand Up @@ -175,37 +175,8 @@ _firq_no_reschedule:
* instruction instead of a pair of cmp and bxx
*/
#if CONFIG_RGF_NUM_BANKS == 1
add sp,sp,4 /* don't need r0 from stack */
pop_s r1
pop_s r2
pop_s r3
pop r4
pop r5
pop r6
pop r7
pop r8
pop r9
pop r10
pop r11
pop_s r12
pop_s r13
pop_s blink
pop_s r0
sr r0, [_ARC_V2_LP_END]
pop_s r0
sr r0, [_ARC_V2_LP_START]
pop_s r0
mov lp_count,r0
#ifdef CONFIG_CODE_DENSITY
pop_s r0
sr r0, [_ARC_V2_EI_BASE]
pop_s r0
sr r0, [_ARC_V2_LDI_BASE]
pop_s r0
sr r0, [_ARC_V2_JLI_BASE]
#endif
_pop_irq_stack_frame
ld r0,[saved_r0]
add sp,sp,8 /* don't need ilink & status32_po from stack */
#endif
rtie

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40 changes: 5 additions & 35 deletions arch/arc/core/isr_wrapper.S
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Original file line number Diff line number Diff line change
Expand Up @@ -81,9 +81,6 @@ IRQ stack frame layout:
low address

Registers not taken into account in the current implementation.
jli_base
ldi_base
ei_base
accl
acch

Expand Down Expand Up @@ -240,40 +237,13 @@ SECTION_FUNC(TEXT, _isr_wrapper)
#if CONFIG_RGF_NUM_BANKS == 1
bnz rirq_path
/* 1-register bank FIRQ handling must save registers on stack */
lr r0,[_ARC_V2_STATUS32_P0]
push_s r0
_create_irq_stack_frame
lr r0, [_ARC_V2_STATUS32_P0]
st_s r0, [sp, ___isf_t_status32_OFFSET]
mov r0,ilink
push_s r0
#ifdef CONFIG_CODE_DENSITY
lr r0, [_ARC_V2_JLI_BASE]
push_s r0
lr r0, [_ARC_V2_LDI_BASE]
push_s r0
lr r0, [_ARC_V2_EI_BASE]
push_s r0
#endif
mov r0,lp_count
push_s r0
lr r0, [_ARC_V2_LP_START]
push_s r0
lr r0, [_ARC_V2_LP_END]
push_s r0
push_s blink
push_s r13
push_s r12
push r11
push r10
push r9
push r8
push r7
push r6
push r5
push r4
push_s r3
push_s r2
push_s r1
st_s r0, [sp, ___isf_t_pc_OFFSET]
ld r0,[saved_r0]
push_s r0
st_s r0, [sp, ___isf_t_r0_OFFSET]
mov r3, _firq_exit
mov r2, _firq_enter
j_s [r2]
Expand Down