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riscv: implement local_irq_{save,restore} macros

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Add implementations of the local_irq_{save,restore} macros so that
<asm/atomic.h> can be used with riscv.

Signed-off-by: Ben Dooks <ben.dooks@sifive.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
This commit is contained in:
Ben Dooks
2023-05-05 09:02:06 +01:00
committed by Leo Yu-Chi Liang
parent 3c874711ba
commit 551de2169a
1 changed files with 13 additions and 4 deletions
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17
arch/riscv/include/asm/system.h
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@@ -7,15 +7,24 @@
#ifndef __ASM_RISCV_SYSTEM_H
#define __ASM_RISCV_SYSTEM_H
#include <asm/csr.h>
struct event;
/*
* Interrupt configuring macros.
*
* TODO
*
* Interupt configuration macros
*/
#define local_irq_save(__flags) \
do { \
__flags = csr_read_clear(CSR_SSTATUS, SR_SIE) & SR_SIE; \
} while (0)
#define local_irq_restore(__flags) \
do { \
csr_set(CSR_SSTATUS, __flags & SR_SIE); \
} while (0)
/* Hook to set up the CPU (called from SPL too) */
int riscv_cpu_setup(void *ctx, struct event *event);