diff options
Diffstat (limited to 'include/asm-powerpc/kexec.h')
| -rw-r--r-- | include/asm-powerpc/kexec.h | 92 |
1 files changed, 85 insertions, 7 deletions
diff --git a/include/asm-powerpc/kexec.h b/include/asm-powerpc/kexec.h index 062ab9ba68e..640a6459f2f 100644 --- a/include/asm-powerpc/kexec.h +++ b/include/asm-powerpc/kexec.h @@ -1,5 +1,6 @@ #ifndef _ASM_POWERPC_KEXEC_H #define _ASM_POWERPC_KEXEC_H +#ifdef __KERNEL__ /* * Maximum page that is mapped directly into kernel memory. @@ -30,20 +31,97 @@ #define KEXEC_ARCH KEXEC_ARCH_PPC #endif -#ifndef __ASSEMBLY__ +#ifdef CONFIG_KEXEC -#define MAX_NOTE_BYTES 1024 -typedef u32 note_buf_t[MAX_NOTE_BYTES / sizeof(u32)]; +#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 __ */ -extern note_buf_t crash_notes[]; +#ifndef __ASSEMBLY__ +#define MAX_NOTE_BYTES 1024 #ifdef __powerpc64__ extern void kexec_smp_wait(void); /* get and clear naca physid, wait for master to copy new code to 0 */ -#else +extern void __init kexec_setup(void); +extern int crashing_cpu; +extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); +#endif /* __powerpc64 __ */ + struct kimage; -extern void machine_kexec_simple(struct kimage *image); -#endif +struct pt_regs; +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 /* ! __ASSEMBLY__ */ +#endif /* CONFIG_KEXEC */ +#endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_KEXEC_H */ |