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Diffstat (limited to 'arch/sh/kernel/cpu/sh3/entry.S')
-rw-r--r--arch/sh/kernel/cpu/sh3/entry.S207
1 files changed, 21 insertions, 186 deletions
diff --git a/arch/sh/kernel/cpu/sh3/entry.S b/arch/sh/kernel/cpu/sh3/entry.S
index 8c0dc2700c6..c19205b0f2c 100644
--- a/arch/sh/kernel/cpu/sh3/entry.S
+++ b/arch/sh/kernel/cpu/sh3/entry.S
@@ -13,10 +13,8 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
-#include <asm/unistd.h>
#include <asm/cpu/mmu_context.h>
-#include <asm/pgtable.h>
-#include <asm/page.h>
+#include <asm/unistd.h>
! NOTE:
! GNU as (as of 2.9.1) changes bf/s into bt/s and bra, when the address
@@ -138,14 +136,29 @@ ENTRY(tlb_protection_violation_store)
call_dpf:
mov.l 1f, r0
- mov.l @r0, r6 ! address
+ mov r5, r8
+ mov.l @r0, r6
+ mov r6, r9
+ mov.l 2f, r0
+ sts pr, r10
+ jsr @r0
+ mov r15, r4
+ !
+ tst r0, r0
+ bf/s 0f
+ lds r10, pr
+ rts
+ nop
+0: sti
mov.l 3f, r0
-
+ mov r9, r6
+ mov r8, r5
jmp @r0
- mov r15, r4 ! regs
+ mov r15, r4
.align 2
1: .long MMU_TEA
+2: .long __do_page_fault
3: .long do_page_fault
.align 2
@@ -173,7 +186,7 @@ call_dae:
#if defined(CONFIG_SH_STANDARD_BIOS)
/* Unwind the stack and jmp to the debug entry */
-debug_kernel_fw:
+ENTRY(sh_bios_handler)
mov.l @r15+, r0
mov.l @r15+, r1
mov.l @r15+, r2
@@ -332,175 +345,9 @@ general_exception:
!
!
-/* This code makes some assumptions to improve performance.
- * Make sure they are stil true. */
-#if PTRS_PER_PGD != PTRS_PER_PTE
-#error PGD and PTE sizes don't match
-#endif
-
-/* gas doesn't flag impossible values for mov #immediate as an error */
-#if (_PAGE_PRESENT >> 2) > 0x7f
-#error cannot load PAGE_PRESENT as an immediate
-#endif
-#if _PAGE_DIRTY > 0x7f
-#error cannot load PAGE_DIRTY as an immediate
-#endif
-#if (_PAGE_PRESENT << 2) != _PAGE_ACCESSED
-#error cannot derive PAGE_ACCESSED from PAGE_PRESENT
-#endif
-
-#if defined(CONFIG_CPU_SH4)
-#define ldmmupteh(r) mov.l 8f, r
-#else
-#define ldmmupteh(r) mov #MMU_PTEH, r
-#endif
-
.balign 1024,0,1024
tlb_miss:
-#ifdef COUNT_EXCEPTIONS
- ! Increment the counts
- mov.l 9f, k1
- mov.l @k1, k2
- add #1, k2
- mov.l k2, @k1
-#endif
-
- ! k0 scratch
- ! k1 pgd and pte pointers
- ! k2 faulting address
- ! k3 pgd and pte index masks
- ! k4 shift
-
- ! Load up the pgd entry (k1)
-
- ldmmupteh(k0) ! 9 LS (latency=2) MMU_PTEH
-
- mov.w 4f, k3 ! 8 LS (latency=2) (PTRS_PER_PGD-1) << 2
- mov #-(PGDIR_SHIFT-2), k4 ! 6 EX
-
- mov.l @(MMU_TEA-MMU_PTEH,k0), k2 ! 18 LS (latency=2)
-
- mov.l @(MMU_TTB-MMU_PTEH,k0), k1 ! 18 LS (latency=2)
-
- mov k2, k0 ! 5 MT (latency=0)
- shld k4, k0 ! 99 EX
-
- and k3, k0 ! 78 EX
-
- mov.l @(k0, k1), k1 ! 21 LS (latency=2)
- mov #-(PAGE_SHIFT-2), k4 ! 6 EX
-
- ! Load up the pte entry (k2)
-
- mov k2, k0 ! 5 MT (latency=0)
- shld k4, k0 ! 99 EX
-
- tst k1, k1 ! 86 MT
-
- bt 20f ! 110 BR
-
- and k3, k0 ! 78 EX
- mov.w 5f, k4 ! 8 LS (latency=2) _PAGE_PRESENT
-
- mov.l @(k0, k1), k2 ! 21 LS (latency=2)
- add k0, k1 ! 49 EX
-
-#ifdef CONFIG_CPU_HAS_PTEA
- ! Test the entry for present and _PAGE_ACCESSED
-
- mov #-28, k3 ! 6 EX
- mov k2, k0 ! 5 MT (latency=0)
-
- tst k4, k2 ! 68 MT
- shld k3, k0 ! 99 EX
-
- bt 20f ! 110 BR
-
- ! Set PTEA register
- ! MMU_PTEA = ((pteval >> 28) & 0xe) | (pteval & 0x1)
- !
- ! k0=pte>>28, k1=pte*, k2=pte, k3=<unused>, k4=_PAGE_PRESENT
-
- and #0xe, k0 ! 79 EX
-
- mov k0, k3 ! 5 MT (latency=0)
- mov k2, k0 ! 5 MT (latency=0)
-
- and #1, k0 ! 79 EX
-
- or k0, k3 ! 82 EX
-
- ldmmupteh(k0) ! 9 LS (latency=2)
- shll2 k4 ! 101 EX _PAGE_ACCESSED
-
- tst k4, k2 ! 68 MT
-
- mov.l k3, @(MMU_PTEA-MMU_PTEH,k0) ! 27 LS
-
- mov.l 7f, k3 ! 9 LS (latency=2) _PAGE_FLAGS_HARDWARE_MASK
-
- ! k0=MMU_PTEH, k1=pte*, k2=pte, k3=_PAGE_FLAGS_HARDWARE, k4=_PAGE_ACCESSED
-#else
-
- ! Test the entry for present and _PAGE_ACCESSED
-
- mov.l 7f, k3 ! 9 LS (latency=2) _PAGE_FLAGS_HARDWARE_MASK
- tst k4, k2 ! 68 MT
-
- shll2 k4 ! 101 EX _PAGE_ACCESSED
- ldmmupteh(k0) ! 9 LS (latency=2)
-
- bt 20f ! 110 BR
- tst k4, k2 ! 68 MT
-
- ! k0=MMU_PTEH, k1=pte*, k2=pte, k3=_PAGE_FLAGS_HARDWARE, k4=_PAGE_ACCESSED
-
-#endif
-
- ! Set up the entry
-
- and k2, k3 ! 78 EX
- bt/s 10f ! 108 BR
-
- mov.l k3, @(MMU_PTEL-MMU_PTEH,k0) ! 27 LS
-
- ldtlb ! 128 CO
-
- ! At least one instruction between ldtlb and rte
- nop ! 119 NOP
-
- rte ! 126 CO
-
- nop ! 119 NOP
-
-
-10: or k4, k2 ! 82 EX
-
- ldtlb ! 128 CO
-
- ! At least one instruction between ldtlb and rte
- mov.l k2, @k1 ! 27 LS
-
- rte ! 126 CO
-
- ! Note we cannot execute mov here, because it is executed after
- ! restoring SSR, so would be executed in user space.
- nop ! 119 NOP
-
-
- .align 5
- ! Once cache line if possible...
-1: .long swapper_pg_dir
-4: .short (PTRS_PER_PGD-1) << 2
-5: .short _PAGE_PRESENT
-7: .long _PAGE_FLAGS_HARDWARE_MASK
-8: .long MMU_PTEH
-#ifdef COUNT_EXCEPTIONS
-9: .long exception_count_miss
-#endif
-
- ! Either pgd or pte not present
-20: mov.l 1f, k2
+ mov.l 1f, k2
mov.l 4f, k3
bra handle_exception
mov.l @k2, k2
@@ -651,15 +498,6 @@ skip_save:
bf interrupt_exception
shlr2 r8
shlr r8
-
-#ifdef COUNT_EXCEPTIONS
- mov.l 5f, r9
- add r8, r9
- mov.l @r9, r10
- add #1, r10
- mov.l r10, @r9
-#endif
-
mov.l 4f, r9
add r8, r9
mov.l @r9, r9
@@ -673,9 +511,6 @@ skip_save:
2: .long 0x000080f0 ! FD=1, IMASK=15
3: .long 0xcfffffff ! RB=0, BL=0
4: .long exception_handling_table
-#ifdef COUNT_EXCEPTIONS
-5: .long exception_count_table
-#endif
interrupt_exception:
mov.l 1f, r9