diff options
| author | Peter Hoyes <Peter.Hoyes@arm.com> | 2024-05-01 09:16:32 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2024-05-13 16:51:14 -0600 |
| commit | b18a3c183d20812933d192d4b0d622b11ef2bf29 (patch) | |
| tree | fb6398fcd79cdbbaad44ba36093d20fcf24c38e7 /arch/arm/include/asm/system.h | |
| parent | e0112bc508b142786b919eb48c2dc8eca9f0361b (diff) | |
arm: Move sev() and wfe() definitions to common Arm header file
The sev() and wfe() asm macros are currently defined only for
mach-exynos. As these are common Arm instructions, move them to the
common asm/system.h header file, for both Armv7 and Armv8, so they
can be used by other machines.
wfe may theoretically trigger a context switch if an interrupt occurs
so add a memory barrier to this call.
Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
Reviewed-by: Andre Przywara<andre.przywara@arm.com>
Diffstat (limited to 'arch/arm/include/asm/system.h')
| -rw-r--r-- | arch/arm/include/asm/system.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h index 43f7503571d..51123c29684 100644 --- a/arch/arm/include/asm/system.h +++ b/arch/arm/include/asm/system.h @@ -154,6 +154,13 @@ enum dcache_option { "wfi" : : : "memory"); \ }) +#define wfe() \ + ({asm volatile( \ + "wfe" : : : "memory"); \ + }) + +#define sev() asm volatile("sev") + static inline unsigned int current_el(void) { unsigned long el; @@ -369,6 +376,8 @@ void switch_to_hypervisor_ret(void); #ifdef __ARM_ARCH_7A__ #define wfi() __asm__ __volatile__ ("wfi" : : : "memory") +#define wfe() __asm__ __volatile__ ("wfe" : : : "memory") +#define sev() __asm__ __volatile__ ("sev") #else #define wfi() #endif |