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author | Sascha Hauer <s.hauer@pengutronix.de> | 2012-04-13 17:30:58 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-04-13 17:34:52 +0200 |
commit | 2c2f657092781381e9e04fac9e08e6dac034d5bc (patch) | |
tree | c3299578c681d2416e3a194c13a5e66c020d6193 /arch | |
parent | c406f591292ccc2af583445c0a8b5f9ade0310e2 (diff) | |
download | barebox-2c2f657092781381e9e04fac9e08e6dac034d5bc.tar.gz barebox-2c2f657092781381e9e04fac9e08e6dac034d5bc.tar.xz |
ARM startup: invalidate I-cache before jumping to relocated binary
barebox can startup with I-cache enabled, so to be on the safe
side we should invalidate the I-cache before jumping to a binary
we just copied in place.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/cpu/start.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c index ede8fd1f09..0fcc950979 100644 --- a/arch/arm/cpu/start.c +++ b/arch/arm/cpu/start.c @@ -135,6 +135,9 @@ void __naked __section(.text_ll_return) board_init_lowlevel_return(void) /* clear bss */ memset(__bss_start, 0, __bss_stop - __bss_start); + /* flush I-cache before jumping to the copied binary */ + __asm__ __volatile__("mcr p15, 0, %0, c7, c5, 0" : : "r" (0)); + /* call start_barebox with its absolute address */ r = (unsigned int)&start_barebox; __asm__ __volatile__("mov pc, %0" : : "r"(r)); |