From e6ed89ac9f5da16fea5111651b6de0ff0a76a5c2 Mon Sep 17 00:00:00 2001 From: Deepak Saxena Date: Tue, 30 May 2006 14:36:49 -0700 Subject: [PATCH] [PATCH] ARM: explicitly disable BTB on ixp2350 We don't enable the BTB on the ixp2350 as that can cause weird crashes (erratum #42.) However, some bootloaders enable the BTB, which means that we have to disable the BTB explicitly. Found thanks to Tom Rini. Signed-off-by: Lennert Buytenhek Signed-off-by: Deepak Saxena Signed-off-by: Linus Torvalds --- arch/arm/mm/proc-xsc3.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S index 80873b36c3f7..8d32e21fe151 100644 --- a/arch/arm/mm/proc-xsc3.S +++ b/arch/arm/mm/proc-xsc3.S @@ -427,12 +427,13 @@ __xsc3_setup: #endif mcr p15, 0, r0, c1, c0, 1 @ set auxiliary control reg mrc p15, 0, r0, c1, c0, 0 @ get control register - bic r0, r0, #0x0200 @ .... ..R. .... .... bic r0, r0, #0x0002 @ .... .... .... ..A. orr r0, r0, #0x0005 @ .... .... .... .C.M #if BTB_ENABLE + bic r0, r0, #0x0200 @ .... ..R. .... .... orr r0, r0, #0x3900 @ ..VI Z..S .... .... #else + bic r0, r0, #0x0a00 @ .... Z.R. .... .... orr r0, r0, #0x3100 @ ..VI ...S .... .... #endif #if L2_CACHE_ENABLE -- 2.20.1