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

diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index a64e87d..89a8456 100644 (file)
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -90,35 +90,15 @@
        .endm
 
        /*
-        * For the moment disable interrupts, mark the kernel mode and
-        * set ST0_KX so that the CPU does not spit fire when using
-        * 64-bit addresses.  A full initialization of the CPU's status
-        * register is done later in per_cpu_trap_init().
+        * For the moment set ST0_KU so the CPU will not spit fire when
+        * executing 64-bit instructions.  The full initialization of the
+        * CPU's status register is done later in per_cpu_trap_init().
         */
-       .macro  setup_c0_status set clr
-       .set    push
+       .macro  setup_c0_status
+#ifdef CONFIG_MIPS64
        mfc0    t0, CP0_STATUS
-       or      t0, ST0_CU0|\set|0x1f|\clr
-       xor     t0, 0x1f|\clr
+       or      t0, ST0_KX
        mtc0    t0, CP0_STATUS
-       .set    noreorder
-       sll     zero,3                          # ehb
-       .set    pop
-       .endm
-
-       .macro  setup_c0_status_pri
-#ifdef CONFIG_MIPS64
-       setup_c0_status ST0_KX 0
-#else
-       setup_c0_status 0 0
-#endif
-       .endm
-
-       .macro  setup_c0_status_sec
-#ifdef CONFIG_MIPS64
-       setup_c0_status ST0_KX ST0_BEV
-#else
-       setup_c0_status 0 ST0_BEV
 #endif
        .endm
 
@@ -134,7 +114,7 @@ EXPORT(_stext)
        __INIT
 
 NESTED(kernel_entry, 16, sp)                   # kernel entry point
-       setup_c0_status_pri
+       setup_c0_status
 
 #ifdef CONFIG_SGI_IP27
        GET_NASID_ASM   t1
@@ -144,6 +124,8 @@ NESTED(kernel_entry, 16, sp)                        # kernel entry point
 
        ARC64_TWIDDLE_PC
 
+       CLI                                     # disable interrupts
+
        PTR_LA          t0, __bss_start         # clear .bss
        LONG_S          zero, (t0)
        PTR_LA          t1, __bss_stop - LONGSIZE
@@ -162,7 +144,7 @@ NESTED(kernel_entry, 16, sp)                        # kernel entry point
        set_saved_sp    sp, t0, t1
        PTR_SUBU        sp, 4 * SZREG           # init stack pointer
 
-       j               start_kernel
+       jal             start_kernel
        END(kernel_entry)
 
 #ifdef CONFIG_SMP
@@ -171,8 +153,6 @@ NESTED(kernel_entry, 16, sp)                        # kernel entry point
  * function after setting up the stack and gp registers.
  */
 NESTED(smp_bootstrap, 16, sp)
-       setup_c0_status_sec
-
 #ifdef CONFIG_SGI_IP27
        GET_NASID_ASM   t1
        dli     t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \
@@ -186,7 +166,9 @@ NESTED(smp_bootstrap, 16, sp)
        ARC64_TWIDDLE_PC
 #endif /* CONFIG_SGI_IP27 */
 
-       j       start_secondary
+       CLI
+       setup_c0_status
+       jal     start_secondary
        END(smp_bootstrap)
 #endif /* CONFIG_SMP */
 
@@ -219,3 +201,13 @@ NESTED(smp_bootstrap, 16, sp)
        page    invalid_pmd_table, _PMD_ORDER
 #endif
        page    invalid_pte_table, _PTE_ORDER
+
+#ifdef CONFIG_MIPS64
+       /*
+        * 64-bit kernel mappings are really screwed up ...
+        */
+       page    kptbl, _PGD_ORDER
+       .globl  ekptbl
+       page    kpmdtbl, 0
+ekptbl:
+#endif