Merge git://git.infradead.org/mtd-2.6

[karo-tx-linux.git] / arch / powerpc / kernel / traps.c

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 878fbddb6ae10fe3150a329b4a214e07ff80f057..81ccb8dd1a54d8f95b0ed84f357d6e64e5395ab1 100644 (file)
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1067,6 +1067,22 @@ void __kprobes DebugException(struct pt_regs *regs, unsigned long debug_status)
                }
 
                _exception(SIGTRAP, regs, TRAP_TRACE, regs->nip);
+       } else if (debug_status & (DBSR_DAC1R | DBSR_DAC1W)) {
+               regs->msr &= ~MSR_DE;
+
+               if (user_mode(regs)) {
+                       current->thread.dbcr0 &= ~(DBSR_DAC1R | DBSR_DAC1W |
+                                                               DBCR0_IDM);
+               } else {
+                       /* Disable DAC interupts */
+                       mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~(DBSR_DAC1R |
+                                               DBSR_DAC1W | DBCR0_IDM));
+
+                       /* Clear the DAC event */
+                       mtspr(SPRN_DBSR, (DBSR_DAC1R | DBSR_DAC1W));
+               }
+               /* Setup and send the trap to the handler */
+               do_dabr(regs, mfspr(SPRN_DAC1), debug_status);
        }
 }
 #endif /* CONFIG_4xx || CONFIG_BOOKE */