Messages in this thread Patch in this message | | | Date | Tue, 30 May 2006 14:36:49 -0700 | From | Deepak Saxena <> | Subject | [PATCH] ARM: explicitly disable BTB on ixp2350 |
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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 <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Index: linux-2.6.17-rc3/arch/arm/mm/proc-xsc3.S =================================================================== --- linux-2.6.17-rc3.orig/arch/arm/mm/proc-xsc3.S +++ linux-2.6.17-rc3/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
-- Deepak Saxena - dsaxena@plexity.net - http://www.plexity.net
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