patch-2_6_7-vs1_9_1_12

[linux-2.6.git] / arch / ppc / kernel / head.S

diff --git a/arch/ppc/kernel/head.S b/arch/ppc/kernel/head.S
index 54f7728..a7bb502 100644 (file)
--- a/arch/ppc/kernel/head.S
+++ b/arch/ppc/kernel/head.S
@@ -412,9 +412,7 @@ DataAccess:
 1:     stw     r10,_DSISR(r11)
        mr      r5,r10
        mfspr   r4,DAR
-       stw     r4,_DAR(r11)
-       addi    r3,r1,STACK_FRAME_OVERHEAD
-       EXC_XFER_EE_LITE(0x300, do_page_fault)
+       EXC_XFER_EE_LITE(0x300, handle_page_fault)
 
 #ifdef CONFIG_PPC64BRIDGE
 /* SLB fault on data access. */
@@ -436,10 +434,9 @@ InstructionAccess:
        li      r3,0                    /* into the hash table */
        mr      r4,r12                  /* SRR0 is fault address */
        bl      hash_page
-1:     addi    r3,r1,STACK_FRAME_OVERHEAD
-       mr      r4,r12
+1:     mr      r4,r12
        mr      r5,r9
-       EXC_XFER_EE_LITE(0x400, do_page_fault)
+       EXC_XFER_EE_LITE(0x400, handle_page_fault)
 
 #ifdef CONFIG_PPC64BRIDGE
 /* SLB fault on instruction access. */
@@ -491,14 +488,16 @@ SystemCall:
 /*
  * The Altivec unavailable trap is at 0x0f20.  Foo.
  * We effectively remap it to 0x3000.
+ * We include an altivec unavailable exception vector even if
+ * not configured for Altivec, so that you can't panic a
+ * non-altivec kernel running on a machine with altivec just
+ * by executing an altivec instruction.
  */
        . = 0xf00
        b       Trap_0f
 
        . = 0xf20
-#ifdef CONFIG_ALTIVEC
        b       AltiVecUnavailable
-#endif
 
 Trap_0f:
        EXCEPTION_PROLOG
@@ -705,6 +704,7 @@ DataStoreTLBMiss:
 #ifndef CONFIG_ALTIVEC
 #define AltivecAssistException UnknownException
 #endif
+
        EXCEPTION(0x1300, Trap_13, InstructionBreakpoint, EXC_XFER_EE)
        EXCEPTION(0x1400, SMI, SMIException, EXC_XFER_EE)
        EXCEPTION(0x1500, Trap_15, UnknownException, EXC_XFER_EE)
@@ -746,12 +746,12 @@ DataStoreTLBMiss:
 
        . = 0x3000
 
-#ifdef CONFIG_ALTIVEC
 AltiVecUnavailable:
        EXCEPTION_PROLOG
+#ifdef CONFIG_ALTIVEC
        bne     load_up_altivec         /* if from user, just load it up */
-       EXC_XFER_EE_LITE(0xf20, KernelAltiVec)
 #endif /* CONFIG_ALTIVEC */
+       EXC_XFER_EE_LITE(0xf20, AltivecUnavailException)
 
 #ifdef CONFIG_PPC64BRIDGE
 DataAccess:
@@ -1633,7 +1633,7 @@ initial_mm_power4:
        blr
 
 #endif /* CONFIG_POWER4 */
-       
+
 #ifdef CONFIG_8260
 /* Jump into the system reset for the rom.
  * We first disable the MMU, and then jump to the ROM reset address.