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ARMv8: make master CPU checking logic more clear

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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>
This commit is contained in:
zijun_hu
2017-09-25 15:28:50 +08:00
committed by Tom Rini
parent b813908354
commit 34f9a92583
1 changed files with 1 additions and 0 deletions
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arch/arm/include/asm/macro.h
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@@ -131,6 +131,7 @@ lr .req x30
/* NOTE: MPIDR handling will be erroneous on multi-cluster machines */ /* NOTE: MPIDR handling will be erroneous on multi-cluster machines */
mrs \xreg1, mpidr_el1 mrs \xreg1, mpidr_el1
lsr \xreg2, \xreg1, #32 lsr \xreg2, \xreg1, #32
lsl \xreg2, \xreg2, #32
lsl \xreg1, \xreg1, #40 lsl \xreg1, \xreg1, #40
lsr \xreg1, \xreg1, #40 lsr \xreg1, \xreg1, #40
orr \xreg1, \xreg1, \xreg2 orr \xreg1, \xreg1, \xreg2