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arm64: Fix the soft_restart routine

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Change the soft_restart() routine to call cpu_reset() at its identity mapped
physical address.

The cpu_reset() routine must be called at its identity mapped physical address
so that when the MMU is turned off the instruction pointer will be at the correct
location in physical memory.

Signed-off-by: Geoff Levand <geoff@infradead.org> for Huawei, Linaro
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit 09024aa61e)
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Geoff Levand
2013-12-17 00:19:29 +00:00
committed by Mark Brown
parent 25bf912c54
commit 4a64e4b612
1 changed files with 10 additions and 1 deletions
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11
arch/arm64/kernel/process.c
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@@ -71,8 +71,17 @@ static void setup_restart(void)
void soft_restart(unsigned long addr)
{
typedef void (*phys_reset_t)(unsigned long);
phys_reset_t phys_reset;
setup_restart();
cpu_reset(addr);
/* Switch to the identity mapping */
phys_reset = (phys_reset_t)virt_to_phys(cpu_reset);
phys_reset(addr);
/* Should never get here */
BUG();
}
/*