diff options
| author | Mika Westerberg <mika.westerberg@iki.fi> | 2010-05-10 09:22:14 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-09 15:00:51 +0100 |
| commit | 24b776bfb6396fded148167643ffaf8eb3f782b1 (patch) | |
| tree | 60a770cc8eaf73988094e4e6b0fc4bbaa0641bd2 /arch/arm/include/asm/kexec.h | |
| parent | 3c57fb43c8fcbe46541d3a0274f0b4c802c68927 (diff) | |
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>
Diffstat (limited to 'arch/arm/include/asm/kexec.h')
| -rw-r--r-- | arch/arm/include/asm/kexec.h | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/arch/arm/include/asm/kexec.h b/arch/arm/include/asm/kexec.h index df15a0dc228e..8ec9ef5c3c7b 100644 --- a/arch/arm/include/asm/kexec.h +++ b/arch/arm/include/asm/kexec.h @@ -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__ */ |