From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] Fix smp_on_up detection
Date: Thu, 2 Sep 2010 17:51:42 -0700 [thread overview]
Message-ID: <mailman.230.1283477996.27306.linux-arm-kernel@lists.infradead.org> (raw)
This is needed to detect UP properly on older ARMv7 like Cortex-A8.
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 0b4a626..86aa36d 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -346,8 +346,8 @@ __fixup_smp:
bne smp_on_up @ no, assume UP
mrc p15, 0, r0, c0, c0, 5 @ read MIDR
movs r0, r0, lsr #30
- teqne r0, #3 @ check top two bits 00 or 11
- movne pc, lr
+ teq r0, #2 @ check top two bits, 10 for SMP
+ moveq pc, lr
smp_on_up:
adr r0, 1f
--CNK/L7dwKXQ4Ub8J--
reply other threads:[~2010-09-03 0:51 UTC|newest]
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