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authorHaojian Zhuang <haojian.zhuang@marvell.com>2009-12-30 10:02:57 -0500
committerEric Miao <eric.y.miao@gmail.com>2010-01-01 15:51:53 +0800
commit548c6af4627f4dcb24512a381193206e09bd6d31 (patch)
treec9431a3b9bd63292b79cf95bea44940946dc1632 /arch/arm/mm
parentdc8601a224d546bb321b058fc5ecabdb688a3582 (diff)
downloadlinux-548c6af4627f4dcb24512a381193206e09bd6d31.tar.bz2
[ARM] pxa: enable L2 if present in XSC3
Check whether L2 is present or not in XSC3. If it's present, enable L2 immediately. Disabling L2 after L2 is enabled that would result in unpredicatable behavior of XSC3 processor. Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/proc-xsc3.S7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S
index 96456f548798..8e4f6dca8997 100644
--- a/arch/arm/mm/proc-xsc3.S
+++ b/arch/arm/mm/proc-xsc3.S
@@ -407,6 +407,13 @@ __xsc3_setup:
adr r5, xsc3_crval
ldmia r5, {r5, r6}
+
+#ifdef CONFIG_CACHE_XSC3L2
+ mrc p15, 1, r0, c0, c0, 1 @ get L2 present information
+ ands r0, r0, #0xf8
+ orrne r6, r6, #(1 << 26) @ enable L2 if present
+#endif
+
mrc p15, 0, r0, c1, c0, 0 @ get control register
bic r0, r0, r5 @ ..V. ..R. .... ..A.
orr r0, r0, r6 @ ..VI Z..S .... .C.M (mmu)