From 080be069f5fc4cd0f5a9fbf3e697e0a9ba3ca992 Mon Sep 17 00:00:00 2001 From: Patrick Rudolph Date: Wed, 23 Oct 2024 15:20:15 +0200 Subject: [PATCH] arm: Implement read_mpidr on armv7 Implement read_mpidr() on armv7 to make use of it in generic code that compiles on both armv7 and armv8. Signed-off-by: Patrick Rudolph Reviewed-by: Simon Glass --- arch/arm/include/asm/system.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h index 2237d7d006..9eb30c2ade 100644 --- a/arch/arm/include/asm/system.h +++ b/arch/arm/include/asm/system.h @@ -394,6 +394,15 @@ void switch_to_hypervisor_ret(void); #define wfi() #endif +static inline unsigned long read_mpidr(void) +{ + unsigned long val; + + asm volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (val)); + + return val; +} + static inline unsigned long get_cpsr(void) { unsigned long cpsr; -- 2.39.5