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authorThomas Gleixner <[tglx@linutronix.de]>2010-07-31 21:06:06 +0530
committerSantosh Shilimkar <santosh.shilimkar@ti.com>2010-10-26 11:39:56 +0530
commitae360a78f41164e7f9c4cf846696b5b6d8dae5c8 (patch)
treecb96d4ecbb0c04e7c25a0b08b2dc7f979391a1dc /arch/arm/kernel/machine_kexec.c
parent9a6655e49fd98f3748bb80da20705448aad9ee57 (diff)
arm: Disable outer (L2) cache in kexec
kexec does not disable the outer cache before disabling the inner caches in cpu_proc_fin(). So L2 is enabled across the kexec jump. When the new kernel enables chaches again, it randomly crashes. Disabling L2 before calling cpu_proc_fin() cures the problem. Disabling L2 requires the following new functions: flush_all(), inv_all() and disable(). Add them to outer_cache_fns and call them from the kexec code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Diffstat (limited to 'arch/arm/kernel/machine_kexec.c')
-rw-r--r--arch/arm/kernel/machine_kexec.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
index 1fc74cbd1a1..3a8fd5140d7 100644
--- a/arch/arm/kernel/machine_kexec.c
+++ b/arch/arm/kernel/machine_kexec.c
@@ -78,7 +78,10 @@ void machine_kexec(struct kimage *image)
local_fiq_disable();
setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
flush_cache_all();
+ outer_flush_all();
+ outer_disable();
cpu_proc_fin();
+ outer_inv_all();
flush_cache_all();
cpu_reset(reboot_code_buffer_phys);
}