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authorHaren Myneni <haren@us.ibm.com>2006-01-13 19:15:36 -0800
committerPaul Mackerras <paulus@samba.org>2006-01-15 13:14:42 +1100
commit8385a6a3acfbb4b68150c25cfe9084b6c4f501cf (patch)
tree9985155527550b8025603515e4ba96d5c24e6072 /include
parent9216ad8cb7849d88b6d8e9f097718de4f25d4121 (diff)
downloadop-kernel-dev-8385a6a3acfbb4b68150c25cfe9084b6c4f501cf.zip
op-kernel-dev-8385a6a3acfbb4b68150c25cfe9084b6c4f501cf.tar.gz
[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 fffdf69..640a645 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 */
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