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authorJosh Boyer <jwboyer@linux.vnet.ibm.com>2009-09-23 03:51:04 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-09-24 15:31:49 +1000
commitdaf8f40391b2a1978ea2071c20959d91fade6b1a (patch)
tree6c0cd6e6ee27b2453edc4039bb6a26688db82c14 /arch/powerpc/xmon
parentf32af63ed1327451cb91e3816fa043b6c2c52db1 (diff)
downloadblackbird-obmc-linux-daf8f40391b2a1978ea2071c20959d91fade6b1a.tar.gz
blackbird-obmc-linux-daf8f40391b2a1978ea2071c20959d91fade6b1a.zip
powerpc/4xx: Fix erroneous xmon warning on PowerPC 4xx
The xmon code relies on MSR_RI being non-zero to indicate that an exception is recoverable. If it is not, it prints a warning message. However, the PowerPC 4xx cores do not have an MSR_RI bit and this warning is produced for every xmon event. This introduces an unrecoverable_excp function to determine if an exception is recoverable or not. This gets rid of the erroneous warnings on 4xx. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/xmon')
-rw-r--r--arch/powerpc/xmon/xmon.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 0e09a45ac79a..c6f0a71b405e 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -335,6 +335,16 @@ int cpus_are_in_xmon(void)
}
#endif
+static inline int unrecoverable_excp(struct pt_regs *regs)
+{
+#ifdef CONFIG_4xx
+ /* We have no MSR_RI bit on 4xx, so we simply return false */
+ return 0;
+#else
+ return ((regs->msr & MSR_RI) == 0);
+#endif
+}
+
static int xmon_core(struct pt_regs *regs, int fromipi)
{
int cmd = 0;
@@ -388,7 +398,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
bp = NULL;
if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF))
bp = at_breakpoint(regs->nip);
- if (bp || (regs->msr & MSR_RI) == 0)
+ if (bp || unrecoverable_excp(regs))
fromipi = 0;
if (!fromipi) {
@@ -399,7 +409,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
cpu, BP_NUM(bp));
xmon_print_symbol(regs->nip, " ", ")\n");
}
- if ((regs->msr & MSR_RI) == 0)
+ if (unrecoverable_excp(regs))
printf("WARNING: exception is not recoverable, "
"can't continue\n");
release_output_lock();
@@ -490,7 +500,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
printf("Stopped at breakpoint %x (", BP_NUM(bp));
xmon_print_symbol(regs->nip, " ", ")\n");
}
- if ((regs->msr & MSR_RI) == 0)
+ if (unrecoverable_excp(regs))
printf("WARNING: exception is not recoverable, "
"can't continue\n");
remove_bpts();
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