diff options
| -rw-r--r-- | src/arch/armv7/include/arch/cpu.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/arch/armv7/include/arch/cpu.h b/src/arch/armv7/include/arch/cpu.h index f8b3005e95..efd2dc9af9 100644 --- a/src/arch/armv7/include/arch/cpu.h +++ b/src/arch/armv7/include/arch/cpu.h @@ -48,4 +48,40 @@ struct cpuinfo_arm { #endif +/* Primitives for CPU and MP cores. */ + +/* read Main Id register (MIDR) */ +inline static uint32_t read_midr(void) +{ + uint32_t value; + asm volatile ("mrc p15, 0, %0, c0, c0, 0" : "=r"(value)); + return value; +} + +/* read Multiprocessor Affinity Register (MPIDR) */ +inline static uint32_t read_mpidr(void) +{ + uint32_t value; + asm volatile ("mrc p15, 0, %0, c0, c0, 5" : "=r"(value)); + return value; +} + +/* wait for interrupt. */ +inline static void wfi(void) +{ + asm volatile ("wfi" : : : "memory"); +} + +/* wait for event. */ +inline static void wfe(void) +{ + asm volatile ("wfe"); +} + +/* set event (to bring up cores in WFE state). */ +inline static void sev(void) +{ + asm volatile ("sev"); +} + #endif /* __ARCH_CPU_H__ */ |