diff options
| author | Haren Myneni <haren@us.ibm.com> | 2006-01-13 19:15:36 -0800 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-01-15 13:14:42 +1100 |
| commit | 8385a6a3acfbb4b68150c25cfe9084b6c4f501cf (patch) | |
| tree | 9985155527550b8025603515e4ba96d5c24e6072 /include/asm-powerpc | |
| parent | 9216ad8cb7849d88b6d8e9f097718de4f25d4121 (diff) | |
[PATCH] powerpc: Fix kdump copy regs and dynamic allocate per-cpu crash notes
- This contains the arch specific changes for the following the
kdump generic fixes which were already accepted in the upstream.
. Capturing CPU registers (for the case of 'panic' and invoking
the dump using 'sysrq-trigger') from a function (stack frame) which will
be not be available during the kdump boot. Hence, might result in
invalid stack trace.
. Dynamically allocating per cpu ELF notes section instead of
statically for NR_CPUS.
- Fix the compiler warning in prom_init.c.
Signed-off-by: Haren Myneni <haren@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/kexec.h | 85 |
1 files changed, 73 insertions, 12 deletions
diff --git a/include/asm-powerpc/kexec.h b/include/asm-powerpc/kexec.h index fffdf690b84..640a6459f2f 100644 --- a/include/asm-powerpc/kexec.h +++ b/include/asm-powerpc/kexec.h @@ -31,12 +31,80 @@ #define KEXEC_ARCH KEXEC_ARCH_PPC #endif -#define HAVE_ARCH_COPY_OLDMEM_PAGE - -#ifndef __ASSEMBLY__ - #ifdef CONFIG_KEXEC +#ifdef __powerpc64__ +/* + * This function is responsible for capturing register states if coming + * via panic or invoking dump using sysrq-trigger. + */ +static inline void crash_setup_regs(struct pt_regs *newregs, + struct pt_regs *oldregs) +{ + if (oldregs) + memcpy(newregs, oldregs, sizeof(*newregs)); + else { + /* FIXME Merge this with xmon_save_regs ?? */ + unsigned long tmp1, tmp2; + __asm__ __volatile__ ( + "std 0,0(%2)\n" + "std 1,8(%2)\n" + "std 2,16(%2)\n" + "std 3,24(%2)\n" + "std 4,32(%2)\n" + "std 5,40(%2)\n" + "std 6,48(%2)\n" + "std 7,56(%2)\n" + "std 8,64(%2)\n" + "std 9,72(%2)\n" + "std 10,80(%2)\n" + "std 11,88(%2)\n" + "std 12,96(%2)\n" + "std 13,104(%2)\n" + "std 14,112(%2)\n" + "std 15,120(%2)\n" + "std 16,128(%2)\n" + "std 17,136(%2)\n" + "std 18,144(%2)\n" + "std 19,152(%2)\n" + "std 20,160(%2)\n" + "std 21,168(%2)\n" + "std 22,176(%2)\n" + "std 23,184(%2)\n" + "std 24,192(%2)\n" + "std 25,200(%2)\n" + "std 26,208(%2)\n" + "std 27,216(%2)\n" + "std 28,224(%2)\n" + "std 29,232(%2)\n" + "std 30,240(%2)\n" + "std 31,248(%2)\n" + "mfmsr %0\n" + "std %0, 264(%2)\n" + "mfctr %0\n" + "std %0, 280(%2)\n" + "mflr %0\n" + "std %0, 288(%2)\n" + "bl 1f\n" + "1: mflr %1\n" + "std %1, 256(%2)\n" + "mtlr %0\n" + "mfxer %0\n" + "std %0, 296(%2)\n" + : "=&r" (tmp1), "=&r" (tmp2) + : "b" (newregs)); + } +} +#else +/* + * Provide a dummy definition to avoid build failures. Will remain + * empty till crash dump support is enabled. + */ +static inline void crash_setup_regs(struct pt_regs *newregs, + struct pt_regs *oldregs) { } +#endif /* !__powerpc64 __ */ + +#ifndef __ASSEMBLY__ #define MAX_NOTE_BYTES 1024 #ifdef __powerpc64__ @@ -53,14 +121,7 @@ extern void default_machine_kexec(struct kimage *image); extern int default_machine_kexec_prepare(struct kimage *image); extern void default_machine_crash_shutdown(struct pt_regs *regs); -#endif /* !CONFIG_KEXEC */ - -/* - * Provide a dummy definition to avoid build failures. Will remain - * empty till crash dump support is enabled. - */ -static inline void crash_setup_regs(struct pt_regs *newregs, - struct pt_regs *oldregs) { } #endif /* ! __ASSEMBLY__ */ +#endif /* CONFIG_KEXEC */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_KEXEC_H */ |