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ARM: 6117/1: kdump: implement crash_setup_regs() 

Implement machine specific function crash_setup_regs() which is
responsible for storing machine state when crash occured.

Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Mika Westerberg 2010-05-10 09:22:14 +01:00 committed by Russell King
parent 3c57fb43c8
commit 24b776bfb6
1 changed files with 19 additions and 3 deletions
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22
arch/arm/include/asm/kexec.h
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@ -19,10 +19,26 @@
#ifndef __ASSEMBLY__
struct kimage;
/* Provide a dummy definition to avoid build failures. */
/**
* crash_setup_regs() - save registers for the panic kernel
* @newregs: registers are saved here
* @oldregs: registers to be saved (may be %NULL)
*
* Function copies machine registers from @oldregs to @newregs. If @oldregs is
* %NULL then current registers are stored there.
*/
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs) { }
struct pt_regs *oldregs)
{
if (oldregs) {
memcpy(newregs, oldregs, sizeof(*newregs));
} else {
__asm__ __volatile__ ("stmia %0, {r0 - r15}"
: : "r" (&newregs->ARM_r0));
__asm__ __volatile__ ("mrs %0, cpsr"
: "=r" (newregs->ARM_cpsr));
}
}
#endif /* __ASSEMBLY__ */