diff options
Diffstat (limited to 'arch/sparc/kernel/entry.S')
| -rw-r--r-- | arch/sparc/kernel/entry.S | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S index e0e0b810922..8abe65d3f72 100644 --- a/arch/sparc/kernel/entry.S +++ b/arch/sparc/kernel/entry.S @@ -17,7 +17,6 @@ #include <asm/asm-offsets.h> #include <asm/psr.h> #include <asm/vaddrs.h> -#include <asm/memreg.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/pgtsun4c.h> @@ -829,253 +828,6 @@ vac_hwflush_patch2_on: sta %g0, [%l3 + %l7] ASI_HWFLUSHSEG .globl vac_hwflush_patch2 .align 4 - .globl sun4c_fault - -! %l0 = %psr -! %l1 = %pc -! %l2 = %npc -! %l3 = %wim -! %l7 = 1 for textfault -! We want error in %l5, vaddr in %l6 -sun4c_fault: - sethi %hi(AC_SYNC_ERR), %l4 - add %l4, 0x4, %l6 ! AC_SYNC_VA in %l6 - lda [%l6] ASI_CONTROL, %l5 ! Address - lda [%l4] ASI_CONTROL, %l6 ! Error, retained for a bit - - andn %l5, 0xfff, %l5 ! Encode all info into l7 - srl %l6, 14, %l4 - - and %l4, 2, %l4 - or %l5, %l4, %l4 - - or %l4, %l7, %l7 ! l7 = [addr,write,txtfault] - - andcc %l0, PSR_PS, %g0 - be sun4c_fault_fromuser - andcc %l7, 1, %g0 ! Text fault? - - be 1f - sethi %hi(KERNBASE), %l4 - - mov %l1, %l5 ! PC - -1: - cmp %l5, %l4 - blu sun4c_fault_fromuser - sethi %hi(~((1 << SUN4C_REAL_PGDIR_SHIFT) - 1)), %l4 - - /* If the kernel references a bum kernel pointer, or a pte which - * points to a non existent page in ram, we will run this code - * _forever_ and lock up the machine!!!!! So we must check for - * this condition, the AC_SYNC_ERR bits are what we must examine. - * Also a parity error would make this happen as well. So we just - * check that we are in fact servicing a tlb miss and not some - * other type of fault for the kernel. - */ - andcc %l6, 0x80, %g0 - be sun4c_fault_fromuser - and %l5, %l4, %l5 - - /* Test for NULL pte_t * in vmalloc area. */ - sethi %hi(VMALLOC_START), %l4 - cmp %l5, %l4 - blu,a invalid_segment_patch1 - lduXa [%l5] ASI_SEGMAP, %l4 - - sethi %hi(swapper_pg_dir), %l4 - srl %l5, SUN4C_PGDIR_SHIFT, %l6 - or %l4, %lo(swapper_pg_dir), %l4 - sll %l6, 2, %l6 - ld [%l4 + %l6], %l4 - andcc %l4, PAGE_MASK, %g0 - be sun4c_fault_fromuser - lduXa [%l5] ASI_SEGMAP, %l4 - -invalid_segment_patch1: - cmp %l4, 0x7f - bne 1f - sethi %hi(sun4c_kfree_ring), %l4 - or %l4, %lo(sun4c_kfree_ring), %l4 - ld [%l4 + 0x18], %l3 - deccc %l3 ! do we have a free entry? - bcs,a 2f ! no, unmap one. - sethi %hi(sun4c_kernel_ring), %l4 - - st %l3, [%l4 + 0x18] ! sun4c_kfree_ring.num_entries-- - - ld [%l4 + 0x00], %l6 ! entry = sun4c_kfree_ring.ringhd.next - st %l5, [%l6 + 0x08] ! entry->vaddr = address - - ld [%l6 + 0x00], %l3 ! next = entry->next - ld [%l6 + 0x04], %l7 ! entry->prev - - st %l7, [%l3 + 0x04] ! next->prev = entry->prev - st %l3, [%l7 + 0x00] ! entry->prev->next = next - - sethi %hi(sun4c_kernel_ring), %l4 - or %l4, %lo(sun4c_kernel_ring), %l4 - ! head = &sun4c_kernel_ring.ringhd - - ld [%l4 + 0x00], %l7 ! head->next - - st %l4, [%l6 + 0x04] ! entry->prev = head - st %l7, [%l6 + 0x00] ! entry->next = head->next - st %l6, [%l7 + 0x04] ! head->next->prev = entry - - st %l6, [%l4 + 0x00] ! head->next = entry - - ld [%l4 + 0x18], %l3 - inc %l3 ! sun4c_kernel_ring.num_entries++ - st %l3, [%l4 + 0x18] - b 4f - ld [%l6 + 0x08], %l5 - -2: - or %l4, %lo(sun4c_kernel_ring), %l4 - ! head = &sun4c_kernel_ring.ringhd - - ld [%l4 + 0x04], %l6 ! entry = head->prev - - ld [%l6 + 0x08], %l3 ! tmp = entry->vaddr - - ! Flush segment from the cache. - sethi %hi((64 * 1024)), %l7 -9: -vac_hwflush_patch1: -vac_linesize_patch: - subcc %l7, 16, %l7 - bne 9b -vac_hwflush_patch2: - sta %g0, [%l3 + %l7] ASI_FLUSHSEG - - st %l5, [%l6 + 0x08] ! entry->vaddr = address - - ld [%l6 + 0x00], %l5 ! next = entry->next - ld [%l6 + 0x04], %l7 ! entry->prev - - st %l7, [%l5 + 0x04] ! next->prev = entry->prev - st %l5, [%l7 + 0x00] ! entry->prev->next = next - st %l4, [%l6 + 0x04] ! entry->prev = head - - ld [%l4 + 0x00], %l7 ! head->next - - st %l7, [%l6 + 0x00] ! entry->next = head->next - st %l6, [%l7 + 0x04] ! head->next->prev = entry - st %l6, [%l4 + 0x00] ! head->next = entry - - mov %l3, %l5 ! address = tmp - -4: -num_context_patch1: - mov 0x08, %l7 - - ld [%l6 + 0x08], %l4 - ldub [%l6 + 0x0c], %l3 - or %l4, %l3, %l4 ! encode new vaddr/pseg into l4 - - sethi %hi(AC_CONTEXT), %l3 - lduba [%l3] ASI_CONTROL, %l6 - - /* Invalidate old mapping, instantiate new mapping, - * for each context. Registers l6/l7 are live across - * this loop. - */ -3: deccc %l7 - sethi %hi(AC_CONTEXT), %l3 - stba %l7, [%l3] ASI_CONTROL -invalid_segment_patch2: - mov 0x7f, %l3 - stXa %l3, [%l5] ASI_SEGMAP - andn %l4, 0x1ff, %l3 - bne 3b - stXa %l4, [%l3] ASI_SEGMAP - - sethi %hi(AC_CONTEXT), %l3 - stba %l6, [%l3] ASI_CONTROL - - andn %l4, 0x1ff, %l5 - -1: - sethi %hi(VMALLOC_START), %l4 - cmp %l5, %l4 - - bgeu 1f - mov 1 << (SUN4C_REAL_PGDIR_SHIFT - PAGE_SHIFT), %l7 - - sethi %hi(KERNBASE), %l6 - - sub %l5, %l6, %l4 - srl %l4, PAGE_SHIFT, %l4 - sethi %hi((SUN4C_PAGE_KERNEL & 0xf4000000)), %l3 - or %l3, %l4, %l3 - - sethi %hi(PAGE_SIZE), %l4 - -2: - sta %l3, [%l5] ASI_PTE - deccc %l7 - inc %l3 - bne 2b - add %l5, %l4, %l5 - - b 7f - sethi %hi(sun4c_kernel_faults), %l4 - -1: - srl %l5, SUN4C_PGDIR_SHIFT, %l3 - sethi %hi(swapper_pg_dir), %l4 - or %l4, %lo(swapper_pg_dir), %l4 - sll %l3, 2, %l3 - ld [%l4 + %l3], %l4 - and %l4, PAGE_MASK, %l4 - - srl %l5, (PAGE_SHIFT - 2), %l6 - and %l6, ((SUN4C_PTRS_PER_PTE - 1) << 2), %l6 - add %l6, %l4, %l6 - - sethi %hi(PAGE_SIZE), %l4 - -2: - ld [%l6], %l3 - deccc %l7 - sta %l3, [%l5] ASI_PTE - add %l6, 0x4, %l6 - bne 2b - add %l5, %l4, %l5 - - sethi %hi(sun4c_kernel_faults), %l4 -7: - ld [%l4 + %lo(sun4c_kernel_faults)], %l3 - inc %l3 - st %l3, [%l4 + %lo(sun4c_kernel_faults)] - - /* Restore condition codes */ - wr %l0, 0x0, %psr - WRITE_PAUSE - jmp %l1 - rett %l2 - -sun4c_fault_fromuser: - SAVE_ALL - nop - - mov %l7, %o1 ! Decode the info from %l7 - mov %l7, %o2 - and %o1, 1, %o1 ! arg2 = text_faultp - mov %l7, %o3 - and %o2, 2, %o2 ! arg3 = writep - andn %o3, 0xfff, %o3 ! arg4 = faulting address - - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - call do_sun4c_fault - add %sp, STACKFRAME_SZ, %o0 ! arg1 = pt_regs ptr - - RESTORE_ALL - - .align 4 .globl srmmu_fault srmmu_fault: mov 0x400, %l5 |