Merge branch 'for-2.6.26' of git://neil.brown.name/md

[linux-2.6-omap-h63xx.git] / arch / powerpc / kernel / entry_32.S

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 69a91bd46115e171bb73cf76282db673ce5d054e..0c8614d9875ca8b5966c148c7ad447bbcf3a987d 100644 (file)
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -110,9 +110,9 @@ transfer_to_handler:
        stw     r11,PT_REGS(r12)
 #if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
        /* Check to see if the dbcr0 register is set up to debug.  Use the
-          single-step bit to do this. */
+          internal debug mode bit to do this. */
        lwz     r12,THREAD_DBCR0(r12)
-       andis.  r12,r12,DBCR0_IC@h
+       andis.  r12,r12,DBCR0_IDM@h
        beq+    3f
        /* From user and task is ptraced - load up global dbcr0 */
        li      r12,-1                  /* clear all pending debug events */
@@ -120,6 +120,12 @@ transfer_to_handler:
        lis     r11,global_dbcr0@ha
        tophys(r11,r11)
        addi    r11,r11,global_dbcr0@l
+#ifdef CONFIG_SMP
+       rlwinm  r9,r1,0,0,(31-THREAD_SHIFT)
+       lwz     r9,TI_CPU(r9)
+       slwi    r9,r9,3
+       add     r11,r11,r9
+#endif
        lwz     r12,0(r11)
        mtspr   SPRN_DBCR0,r12
        lwz     r12,4(r11)
@@ -131,11 +137,12 @@ transfer_to_handler:
 2:     /* if from kernel, check interrupted DOZE/NAP mode and
          * check for stack overflow
          */
-       lwz     r9,THREAD_INFO-THREAD(r12)
-       cmplw   r1,r9                   /* if r1 <= current->thread_info */
+       lwz     r9,KSP_LIMIT(r12)
+       cmplw   r1,r9                   /* if r1 <= ksp_limit */
        ble-    stack_ovf               /* then the kernel stack overflowed */
 5:
 #ifdef CONFIG_6xx
+       rlwinm  r9,r1,0,0,31-THREAD_SHIFT
        tophys(r9,r9)                   /* check local flags */
        lwz     r12,TI_LOCAL_FLAGS(r9)
        mtcrf   0x01,r12
@@ -238,10 +245,10 @@ ret_from_syscall:
        stw     r11,_CCR(r1)
 syscall_exit_cont:
 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
-       /* If the process has its own DBCR0 value, load it up.  The single
-          step bit tells us that dbcr0 should be loaded. */
+       /* If the process has its own DBCR0 value, load it up.  The internal
+          debug mode bit tells us that dbcr0 should be loaded. */
        lwz     r0,THREAD+THREAD_DBCR0(r2)
-       andis.  r10,r0,DBCR0_IC@h
+       andis.  r10,r0,DBCR0_IDM@h
        bnel-   load_dbcr0
 #endif
 #ifdef CONFIG_44x
@@ -666,10 +673,10 @@ user_exc_return:          /* r10 contains MSR_KERNEL here */
 
 restore_user:
 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
-       /* Check whether this process has its own DBCR0 value.  The single
-          step bit tells us that dbcr0 should be loaded. */
+       /* Check whether this process has its own DBCR0 value.  The internal
+          debug mode bit tells us that dbcr0 should be loaded. */
        lwz     r0,THREAD+THREAD_DBCR0(r2)
-       andis.  r10,r0,DBCR0_IC@h
+       andis.  r10,r0,DBCR0_IDM@h
        bnel-   load_dbcr0
 #endif
 
@@ -879,6 +886,12 @@ load_dbcr0:
        mfspr   r10,SPRN_DBCR0
        lis     r11,global_dbcr0@ha
        addi    r11,r11,global_dbcr0@l
+#ifdef CONFIG_SMP
+       rlwinm  r9,r1,0,0,(31-THREAD_SHIFT)
+       lwz     r9,TI_CPU(r9)
+       slwi    r9,r9,3
+       add     r11,r11,r9
+#endif
        stw     r10,0(r11)
        mtspr   SPRN_DBCR0,r0
        lwz     r10,4(r11)
@@ -891,7 +904,7 @@ load_dbcr0:
        .section .bss
        .align  4
 global_dbcr0:
-       .space  8
+       .space  8*NR_CPUS
        .previous
 #endif /* !(CONFIG_4xx || CONFIG_BOOKE) */