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ARM: 7881/1: __fixup_smp read of SCU config should do byteswap in BE case 

Commit "bc41b8724f24b9a27d1dcc6c974b8f686b38d554 ARM: 7846/1:
Update SMP_ON_UP code to detect A9MPCore with 1 CPU devices"
added read of SCU config register into __fixup_smp function.
Such read should be followed by byteswap, if kernel runs in
BE mode.

Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
hifive-unleashed-5.1
Victor Kamensky 2013-11-07 08:42:40 +01:00 committed by Russell King
parent 83651bb988
commit 10593b2e49
1 changed files with 1 additions and 0 deletions
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arch/arm/kernel/head.S
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@ -508,6 +508,7 @@ __fixup_smp:
teq r0, #0x0 @ '0' on actual UP A9 hardware
beq __fixup_smp_on_up @ So its an A9 UP
ldr r0, [r0, #4] @ read SCU Config
ARM_BE8(rev r0, r0) @ byteswap if big endian
and r0, r0, #0x3 @ number of CPUs
teq r0, #0x0 @ is 1?
movne pc, lr