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authorOlof Johansson <olof@lixom.net>2007-09-21 05:11:20 +1000
committerPaul Mackerras <paulus@samba.org>2007-10-03 09:11:58 +1000
commit75918a4b5998c93ee1ab131fbe64b97b5d0d2315 (patch)
treef342b9101f48da82b9bd62e8b18a0f1af8a78357
parent6f6682809b994fd9a61081fa0410df31481d5f7f (diff)
[POWERPC] Separate out legacy machine check exception parsers
Move out the old-style exception parsers to a separate function, and don't call it on platforms that have a platform-specific handler. It would make sense to move out the generic versions into their platforms instead, but that can be done gradually down the road. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--arch/powerpc/kernel/traps.c66
1 files changed, 37 insertions, 29 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index ccfc99dad06..5a49eabd492 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -324,38 +324,10 @@ static inline int check_io_access(struct pt_regs *regs)
#define clear_single_step(regs) ((regs)->msr &= ~MSR_SE)
#endif
-void machine_check_exception(struct pt_regs *regs)
+static int generic_machine_check_exception(struct pt_regs *regs)
{
- int recover = 0;
unsigned long reason = get_mc_reason(regs);
- /* See if any machine dependent calls */
- if (ppc_md.machine_check_exception)
- recover = ppc_md.machine_check_exception(regs);
-
- if (recover)
- return;
-
- if (user_mode(regs)) {
- regs->msr |= MSR_RI;
- _exception(SIGBUS, regs, BUS_ADRERR, regs->nip);
- return;
- }
-
-#if defined(CONFIG_8xx) && defined(CONFIG_PCI)
- /* the qspan pci read routines can cause machine checks -- Cort */
- bad_page_fault(regs, regs->dar, SIGBUS);
- return;
-#endif
-
- if (debugger_fault_handler(regs)) {
- regs->msr |= MSR_RI;
- return;
- }
-
- if (check_io_access(regs))
- return;
-
#if defined(CONFIG_4xx) && !defined(CONFIG_440A)
if (reason & ESR_IMCP) {
printk("Instruction");
@@ -471,6 +443,42 @@ void machine_check_exception(struct pt_regs *regs)
}
#endif /* CONFIG_4xx */
+ return 0;
+}
+
+void machine_check_exception(struct pt_regs *regs)
+{
+ int recover = 0;
+
+ /* See if any machine dependent calls */
+ if (ppc_md.machine_check_exception)
+ recover = ppc_md.machine_check_exception(regs);
+ else
+ recover = generic_machine_check_exception(regs);
+
+ if (recover)
+ return;
+
+ if (user_mode(regs)) {
+ regs->msr |= MSR_RI;
+ _exception(SIGBUS, regs, BUS_ADRERR, regs->nip);
+ return;
+ }
+
+#if defined(CONFIG_8xx) && defined(CONFIG_PCI)
+ /* the qspan pci read routines can cause machine checks -- Cort */
+ bad_page_fault(regs, regs->dar, SIGBUS);
+ return;
+#endif
+
+ if (debugger_fault_handler(regs)) {
+ regs->msr |= MSR_RI;
+ return;
+ }
+
+ if (check_io_access(regs))
+ return;
+
if (debugger_fault_handler(regs))
return;
die("Machine check", regs, SIGBUS);