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 <patrick.rudolph@9elements.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 2237d7d..9eb30c2 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -394,6 +394,15 @@
#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;