diff mbox

[U-Boot,RESUBMIT,v3,1/8] armv8: Add read_mpidr() function

Message ID 1439484688-866-2-git-send-email-s.temerkhanov@gmail.com
State Accepted
Commit ba5648cd91b010a9288798472a6d51b137fff89d
Delegated to: Tom Rini
Headers show

Commit Message

Sergey Temerkhanov Aug. 13, 2015, 4:51 p.m. UTC 
This patch adds the read_mpidr() function which returns the
MPIDR_EL1 register value

Signed-off-by: Sergey Temerkhanov <s.temerkhanov@gmail.com>
---

Changes in v3: None
Changes in v2: None

 arch/arm/include/asm/system.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

Comments

Simon Glass Aug. 14, 2015, 6:55 p.m. UTC | #1 
On 13 August 2015 at 10:51, Sergey Temerkhanov <s.temerkhanov@gmail.com> wrote:
> This patch adds the read_mpidr() function which returns the
> MPIDR_EL1 register value
>
> Signed-off-by: Sergey Temerkhanov <s.temerkhanov@gmail.com>
> ---
>
> Changes in v3: None
> Changes in v2: None
>
>  arch/arm/include/asm/system.h | 11 +++++++++++
>  1 file changed, 11 insertions(+)

Reviewed-by: Simon Glass <sjg@chromium.org>
diff mbox

Patch

diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 868ea54..323c43e 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -71,6 +71,17 @@  static inline void set_sctlr(unsigned int val)
 	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);