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Merge pull request #20 from acevest/context_switch

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improve risc-v context switch
This commit is contained in:
Supowang1989
2019-09-29 11:30:08 +08:00
committed by GitHub
parent bb205c7fba e4038592b9
commit 73e81714ca
1 changed files with 2 additions and 11 deletions
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13
arch/risc-v/rv32i/gcc/port_s.S
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@@ -136,11 +136,6 @@ port_systick_pending_reset:
addi sp, sp, 32*REGBYTES addi sp, sp, 32*REGBYTES
.endm .endm
.align 2
context_switch_return:
irq_context_return:
ret
.align 2 .align 2
.type port_sched_start, %function .type port_sched_start, %function
port_sched_start: port_sched_start:
@@ -167,9 +162,7 @@ port_sched_start:
port_context_switch: port_context_switch:
SAVE_CONTEXT SAVE_CONTEXT
// return from port_context_switch as return from a function sw ra, 0*REGBYTES(sp)
la t0, context_switch_return
sw t0, 0*REGBYTES(sp)
csrr t0, mstatus csrr t0, mstatus
li t1, MSTATUS_MPP li t1, MSTATUS_MPP
@@ -200,9 +193,7 @@ port_context_switch:
port_irq_context_switch: port_irq_context_switch:
SAVE_CONTEXT SAVE_CONTEXT
sw ra, 0*REGBYTES(sp)
la t0, irq_context_return
sw t0, 0*REGBYTES(sp)
li t0, MSTATUS_MPP li t0, MSTATUS_MPP
sw t0, 1*REGBYTES(sp) sw t0, 1*REGBYTES(sp)