armv8: Add read_mpidr() function
This patch adds the read_mpidr() function which returns the
MPIDR_EL1 register value
Signed-off-by: Sergey Temerkhanov <s.temerkhanov@gmail.com>
Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla@cavium.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 71b3108..5d66fa0 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -72,6 +72,17 @@
asm volatile("isb");
}
+static inline unsigned long read_mpidr(void)
+{
+ unsigned long val;
+
+ asm volatile("mrs %0, mpidr_el1" : "=r" (val));
+
+ return val;
+}
+
+#define BSP_COREID 0
+
void __asm_flush_dcache_all(void);
void __asm_invalidate_dcache_all(void);
void __asm_flush_dcache_range(u64 start, u64 end);