summaryrefslogtreecommitdiff
path: root/arch/powerpc/xmon/xmon.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/xmon/xmon.c')
-rw-r--r--arch/powerpc/xmon/xmon.c36
1 files changed, 32 insertions, 4 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 0e09a45ac79a..bdbe96c8a7e4 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();
@@ -507,6 +517,15 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
in_xmon = 0;
#endif
+#ifdef CONFIG_BOOKE
+ if (regs->msr & MSR_DE) {
+ bp = at_breakpoint(regs->nip);
+ if (bp != NULL) {
+ regs->nip = (unsigned long) &bp->instr[0];
+ atomic_inc(&bp->ref_count);
+ }
+ }
+#else
if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) {
bp = at_breakpoint(regs->nip);
if (bp != NULL) {
@@ -520,7 +539,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
}
}
}
-
+#endif
insert_cpu_bpts();
local_irq_restore(flags);
@@ -884,6 +903,14 @@ cmds(struct pt_regs *excp)
}
}
+#ifdef CONFIG_BOOKE
+static int do_step(struct pt_regs *regs)
+{
+ regs->msr |= MSR_DE;
+ mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM);
+ return 1;
+}
+#else
/*
* Step a single instruction.
* Some instructions we emulate, others we execute with MSR_SE set.
@@ -914,6 +941,7 @@ static int do_step(struct pt_regs *regs)
regs->msr |= MSR_SE;
return 1;
}
+#endif
static void bootcmds(void)
{