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 --- arch/riscv/include/asm/system.h | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/arch/riscv/include/asm/system.h b/arch/riscv/include/asm/system.h index 9d8e43e394..78093681e5 100644 --- a/arch/riscv/include/asm/system.h +++ b/arch/riscv/include/asm/system.h @@ -7,15 +7,22 @@ #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);