[U-Boot] [PATCH 1/1] ARMv8: make master CPU checking logic more clear

[U-Boot] [PATCH 1/1] ARMv8: make master CPU checking logic more clear

[zijun_hu]

From: zijun_hu <zijun_hu@htc.com>

macro branch_if_master checks master CPU via (Aff3 & (Aff2:Aff1:Aff0))
it is simple but a little obscure.

fix by checking Affx fields within MPIDR_EL1 directly.

Signed-off-by: zijun_hu <zijun_hu@htc.com>
---
 arch/arm/include/asm/macro.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/include/asm/macro.h b/arch/arm/include/asm/macro.h
index e1916f7..0c8652a 100644
--- a/arch/arm/include/asm/macro.h
+++ b/arch/arm/include/asm/macro.h
@@ -131,6 +131,7 @@ lr	.req	x30
 	/* NOTE: MPIDR handling will be erroneous on multi-cluster machines */
 	mrs	\xreg1, mpidr_el1
 	lsr	\xreg2, \xreg1, #32
+	lsl	\xreg2, \xreg2, #32
 	lsl	\xreg1, \xreg1, #40
 	lsr	\xreg1, \xreg1, #40
 	orr	\xreg1, \xreg1, \xreg2
-- 
1.9.1

[U-Boot] [U-Boot, 1/1] ARMv8: make master CPU checking logic more clear

[Tom Rini]

On Mon, Sep 25, 2017 at 03:28:50PM +0800, zijun_hu wrote:

> From: zijun_hu <zijun_hu@htc.com>
> 
> macro branch_if_master checks master CPU via (Aff3 & (Aff2:Aff1:Aff0))
> it is simple but a little obscure.
> 
> fix by checking Affx fields within MPIDR_EL1 directly.
> 
> Signed-off-by: zijun_hu <zijun_hu@htc.com>

Applied to u-boot/master, thanks!

-- 
Tom
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