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authorHaren Myneni <haren@us.ibm.com>2006-01-13 22:15:36 -0500
committerPaul Mackerras <paulus@samba.org>2006-01-14 21:14:42 -0500
commit8385a6a3acfbb4b68150c25cfe9084b6c4f501cf (patch)
tree9985155527550b8025603515e4ba96d5c24e6072 /include
parent9216ad8cb7849d88b6d8e9f097718de4f25d4121 (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')
-rw-r--r--include/asm-powerpc/kexec.h85
1 files changed, 73 insertions, 12 deletions
diff --git a/include/asm-powerpc/kexec.h b/include/asm-powerpc/kexec.h
index fffdf690b840..640a6459f2f4 100644
--- a/include/asm-powerpc/kexec.h
+++ b/include/asm-powerpc/kexec.h
@@ -31,12 +31,80 @@
31#define KEXEC_ARCH KEXEC_ARCH_PPC 31#define KEXEC_ARCH KEXEC_ARCH_PPC
32#endif 32#endif
33 33
34#define HAVE_ARCH_COPY_OLDMEM_PAGE
35
36#ifndef __ASSEMBLY__
37
38#ifdef CONFIG_KEXEC 34#ifdef CONFIG_KEXEC
39 35
36#ifdef __powerpc64__
37/*
38 * This function is responsible for capturing register states if coming
39 * via panic or invoking dump using sysrq-trigger.
40 */
41static inline void crash_setup_regs(struct pt_regs *newregs,
42 struct pt_regs *oldregs)
43{
44 if (oldregs)
45 memcpy(newregs, oldregs, sizeof(*newregs));
46 else {
47 /* FIXME Merge this with xmon_save_regs ?? */
48 unsigned long tmp1, tmp2;
49 __asm__ __volatile__ (
50 "std 0,0(%2)\n"
51 "std 1,8(%2)\n"
52 "std 2,16(%2)\n"
53 "std 3,24(%2)\n"
54 "std 4,32(%2)\n"
55 "std 5,40(%2)\n"
56 "std 6,48(%2)\n"
57 "std 7,56(%2)\n"
58 "std 8,64(%2)\n"
59 "std 9,72(%2)\n"
60 "std 10,80(%2)\n"
61 "std 11,88(%2)\n"
62 "std 12,96(%2)\n"
63 "std 13,104(%2)\n"
64 "std 14,112(%2)\n"
65 "std 15,120(%2)\n"
66 "std 16,128(%2)\n"
67 "std 17,136(%2)\n"
68 "std 18,144(%2)\n"
69 "std 19,152(%2)\n"
70 "std 20,160(%2)\n"
71 "std 21,168(%2)\n"
72 "std 22,176(%2)\n"
73 "std 23,184(%2)\n"
74 "std 24,192(%2)\n"
75 "std 25,200(%2)\n"
76 "std 26,208(%2)\n"
77 "std 27,216(%2)\n"
78 "std 28,224(%2)\n"
79 "std 29,232(%2)\n"
80 "std 30,240(%2)\n"
81 "std 31,248(%2)\n"
82 "mfmsr %0\n"
83 "std %0, 264(%2)\n"
84 "mfctr %0\n"
85 "std %0, 280(%2)\n"
86 "mflr %0\n"
87 "std %0, 288(%2)\n"
88 "bl 1f\n"
89 "1: mflr %1\n"
90 "std %1, 256(%2)\n"
91 "mtlr %0\n"
92 "mfxer %0\n"
93 "std %0, 296(%2)\n"
94 : "=&r" (tmp1), "=&r" (tmp2)
95 : "b" (newregs));
96 }
97}
98#else
99/*
100 * Provide a dummy definition to avoid build failures. Will remain
101 * empty till crash dump support is enabled.
102 */
103static inline void crash_setup_regs(struct pt_regs *newregs,
104 struct pt_regs *oldregs) { }
105#endif /* !__powerpc64 __ */
106
107#ifndef __ASSEMBLY__
40#define MAX_NOTE_BYTES 1024 108#define MAX_NOTE_BYTES 1024
41 109
42#ifdef __powerpc64__ 110#ifdef __powerpc64__
@@ -53,14 +121,7 @@ extern void default_machine_kexec(struct kimage *image);
53extern int default_machine_kexec_prepare(struct kimage *image); 121extern int default_machine_kexec_prepare(struct kimage *image);
54extern void default_machine_crash_shutdown(struct pt_regs *regs); 122extern void default_machine_crash_shutdown(struct pt_regs *regs);
55 123
56#endif /* !CONFIG_KEXEC */
57
58/*
59 * Provide a dummy definition to avoid build failures. Will remain
60 * empty till crash dump support is enabled.
61 */
62static inline void crash_setup_regs(struct pt_regs *newregs,
63 struct pt_regs *oldregs) { }
64#endif /* ! __ASSEMBLY__ */ 124#endif /* ! __ASSEMBLY__ */
125#endif /* CONFIG_KEXEC */
65#endif /* __KERNEL__ */ 126#endif /* __KERNEL__ */
66#endif /* _ASM_POWERPC_KEXEC_H */ 127#endif /* _ASM_POWERPC_KEXEC_H */