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| author | ian <ian@FreeBSD.org> | 2015-01-01 23:18:37 +0000 |
|---|---|---|
| committer | ian <ian@FreeBSD.org> | 2015-01-01 23:18:37 +0000 |
| commit | ae849d329324f5a09144807b1fa6b7e2da19e20a (patch) | |
| tree | 9289a5459fda5c08eef70572cdae7405356cfbae /sys/arm | |
| parent | 3f4a298808d1178d5c321267e94a8b0e29223f00 (diff) | |
| download | FreeBSD-src-ae849d329324f5a09144807b1fa6b7e2da19e20a.zip FreeBSD-src-ae849d329324f5a09144807b1fa6b7e2da19e20a.tar.gz | |
Define a WFI macro that expands to the right form of wait-for-interrupt
depending on the architecture.
Diffstat (limited to 'sys/arm')
| -rw-r--r-- | sys/arm/arm/locore-v6.S | 2 | ||||
| -rw-r--r-- | sys/arm/include/asm.h | 3 | ||||
| -rw-r--r-- | sys/arm/include/sysreg.h | 1 |
3 files changed, 5 insertions, 1 deletions
diff --git a/sys/arm/arm/locore-v6.S b/sys/arm/arm/locore-v6.S index d90dd60..1e29545 100644 --- a/sys/arm/arm/locore-v6.S +++ b/sys/arm/arm/locore-v6.S @@ -461,7 +461,7 @@ ENTRY_NP(cpu_halt) teq r4, #0 movne pc, r4 1: - wfi + WFI b 1b /* diff --git a/sys/arm/include/asm.h b/sys/arm/include/asm.h index 9122e6e..a182863 100644 --- a/sys/arm/include/asm.h +++ b/sys/arm/include/asm.h @@ -227,14 +227,17 @@ #define ISB isb #define DSB dsb #define DMB dmb +#define WFI wfi #elif __ARM_ARCH == 6 #define ISB mcr CP15_CP15ISB #define DSB mcr CP15_CP15DSB #define DMB mcr CP15_CP15DMB +#define WFI mcr CP15_CP15WFI #else #define ISB mcr CP15_CP15ISB #define DSB mcr CP15_CP15DSB /* DSB and DMB are the */ #define DMB mcr CP15_CP15DSB /* same prior to v6.*/ +/* No form of WFI available on v4, define nothing to get an error on use. */ #endif #endif /* !_MACHINE_ASM_H_ */ diff --git a/sys/arm/include/sysreg.h b/sys/arm/include/sysreg.h index b1c7fd3..ad29703 100644 --- a/sys/arm/include/sysreg.h +++ b/sys/arm/include/sysreg.h @@ -166,6 +166,7 @@ /* Only ARMv6: */ #define CP15_CP15DSB p15, 0, r0, c7, c10, 4 /* DSB */ #define CP15_CP15DMB p15, 0, r0, c7, c10, 5 /* DMB */ +#define CP15_CP15WFI p15, 0, r0, c7, c0, 4 /* WFI */ #endif #if __ARM_ARCH >= 7 |
