Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen...

[linux-2.6-omap-h63xx.git] / arch / parisc / kernel / entry.S

diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 8474f9e5ca1032cf16eb2d3c8d8df0262dd0b173..111d47284eacc8c492a2ce55d8f7f006005daa8b 100644 (file)
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -98,7 +98,6 @@
         * The "get_stack" macros are responsible for determining the
         * kernel stack value.
         *
-        * For Faults:
         *      If sr7 == 0
         *          Already using a kernel stack, so call the
         *          get_stack_use_r30 macro to push a pt_regs structure
@@ -110,26 +109,6 @@
         *          task pointer pointed to by cr30. Set the stack
         *          pointer to point to the end of the task structure.
         *
-        * For Interrupts:
-        *      If sr7 == 0
-        *          Already using a kernel stack, check to see if r30
-        *          is already pointing to the per processor interrupt
-        *          stack. If it is, call the get_stack_use_r30 macro
-        *          to push a pt_regs structure on the stack, and store
-        *          registers there. Otherwise, call get_stack_use_cr31
-        *          to get a pointer to the base of the interrupt stack
-        *          and push a pt_regs structure on that stack.
-        *      else
-        *          Need to set up a kernel stack, so call the
-        *          get_stack_use_cr30 macro to set up a pointer
-        *          to the pt_regs structure contained within the
-        *          task pointer pointed to by cr30. Set the stack
-        *          pointer to point to the end of the task structure.
-        *          N.B: We don't use the interrupt stack for the
-        *          first interrupt from userland, because signals/
-        *          resched's are processed when returning to userland,
-        *          and we can sleep in those cases.
-        *
         * Note that we use shadowed registers for temps until
         * we can save %r26 and %r29. %r26 is used to preserve
         * %r8 (a shadowed register) which temporarily contained
@@ -652,7 +631,7 @@
 
        .text
 
-       .align 4096
+       .align  PAGE_SIZE
 
 ENTRY(fault_vector_20)
        /* First vector is invalid (0) */
@@ -904,7 +883,7 @@ ENDPROC(_switch_to)
         *
         */
 
-       .align 4096
+       .align  PAGE_SIZE
 
 ENTRY(syscall_exit_rfi)
        mfctl   %cr30,%r16
@@ -954,21 +933,6 @@ intr_return:
        /* NOTE: Need to enable interrupts incase we schedule. */
        ssm     PSW_SM_I, %r0
 
-       /* Check for software interrupts */
-
-       .import irq_stat,data
-
-       load32  irq_stat,%r19
-#ifdef CONFIG_SMP
-       mfctl   %cr30,%r1
-       ldw     TI_CPU(%r1),%r1 /* get cpu # - int */
-       /* shift left ____cacheline_aligned (aka L1_CACHE_BYTES) amount
-       ** irq_stat[] is defined using ____cacheline_aligned.
-       */
-       SHLREG  %r1,L1_CACHE_SHIFT,%r20
-       add     %r19,%r20,%r19  /* now have &irq_stat[smp_processor_id()] */
-#endif /* CONFIG_SMP */
-
 intr_check_resched:
 
        /* check for reschedule */
@@ -1101,23 +1065,13 @@ intr_do_preempt:
 
 intr_extint:
        CMPIB=,n 0,%r16,1f
+
        get_stack_use_cr30
-       b,n 3f
+       b,n 2f
 
 1:
-#if 0  /* Interrupt Stack support not working yet! */
-       mfctl   %cr31,%r1
-       copy    %r30,%r17
-       /* FIXME! depi below has hardcoded idea of interrupt stack size (32k)*/
-       DEPI    0,31,15,%r17
-       CMPB=,n %r1,%r17,2f
-       get_stack_use_cr31
-       b,n 3f
-#endif
-2:
        get_stack_use_r30
-
-3:
+2:
        save_specials   %r29
        virt_map
        save_general    %r29
@@ -2034,10 +1988,9 @@ ENTRY(syscall_exit)
        STREG     %r28,TASK_PT_GR28(%r1)
 
 #ifdef CONFIG_HPUX
-
 /* <linux/personality.h> cannot be easily included */
 #define PER_HPUX 0x10
-       LDREG     TASK_PERSONALITY(%r1),%r19
+       ldw     TASK_PERSONALITY(%r1),%r19
 
        /* We can't use "CMPIB<> PER_HPUX" since "im5" field is sign extended */
        ldo       -PER_HPUX(%r19), %r19
@@ -2055,24 +2008,6 @@ ENTRY(syscall_exit)
         */
        loadgp
 
-syscall_check_bh:
-
-       /* Check for software interrupts */
-
-       .import irq_stat,data
-
-       load32  irq_stat,%r19
-
-#ifdef CONFIG_SMP
-       /* sched.h: int processor */
-       /* %r26 is used as scratch register to index into irq_stat[] */
-       ldw     TI_CPU-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26 /* cpu # */
-
-       /* shift left ____cacheline_aligned (aka L1_CACHE_BYTES) bits */
-       SHLREG  %r26,L1_CACHE_SHIFT,%r20
-       add     %r19,%r20,%r19  /* now have &irq_stat[smp_processor_id()] */
-#endif /* CONFIG_SMP */
-
 syscall_check_resched:
 
        /* check for reschedule */
@@ -2114,7 +2049,7 @@ syscall_restore:
        /* Are we being ptraced? */
        LDREG   TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
 
-       LDREG   TASK_PTRACE(%r1), %r19
+       ldw     TASK_PTRACE(%r1), %r19
        bb,<    %r19,31,syscall_restore_rfi
        nop
 
@@ -2244,7 +2179,7 @@ syscall_do_resched:
 #else
        nop
 #endif
-       b       syscall_check_bh  /* if resched, we start over again */
+       b       syscall_check_resched   /* if resched, we start over again */
        nop
 ENDPROC(syscall_exit)