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authorMaxime Bizon <mbizon@freebox.fr>2009-03-27 18:42:19 +0100
committerNicolas Pitre <nico@cam.org>2009-03-28 22:39:30 -0400
commitd75de08727018659cd7e060cf0018eaf53e49aaf (patch)
tree355e43af6605aeff23102af26615c9a679306407 /arch/arm
parentc31f403de62415c738ddc9e673cf8e722c82f861 (diff)
[ARM] Kirkwood: invalidate L2 cache before enabling it
I get random oopses on my Kirkwood board at startup when L2 cache is enabled. FYI I'm using Marvell uboot version 3.4.16 Each boot produces the same oops, but anything that changes the kernel size (even only changing initramfs) makes the oops different. I noticed that nothing invalidates the L2 cache before enabling it, doing so fixes my problem. Signed-off-by: Maxime Bizon <mbizon@freebox.fr> Signed-off-by: Nicolas Pitre <nico@marvell.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mm/cache-feroceon-l2.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mm/cache-feroceon-l2.c b/arch/arm/mm/cache-feroceon-l2.c
index d6dd83826f8..1afed5068c2 100644
--- a/arch/arm/mm/cache-feroceon-l2.c
+++ b/arch/arm/mm/cache-feroceon-l2.c
@@ -115,6 +115,10 @@ static inline void l2_inv_pa_range(unsigned long start, unsigned long end)
raw_local_irq_restore(flags);
}
+static inline void l2_inv_all(void)
+{
+ __asm__("mcr p15, 1, %0, c15, c11, 0" : : "r" (0));
+}
/*
* Linux primitives.
@@ -321,6 +325,7 @@ static void __init enable_l2(void)
d = flush_and_disable_dcache();
i = invalidate_and_disable_icache();
+ l2_inv_all();
write_extra_features(u | 0x00400000);
if (i)
enable_icache();