| /* $Id: ultra.S,v 1.72 2002/02/09 19:49:31 davem Exp $ |
| * ultra.S: Don't expand these all over the place... |
| * |
| * Copyright (C) 1997, 2000 David S. Miller (davem@redhat.com) |
| */ |
| |
| #include <linux/config.h> |
| #include <asm/asi.h> |
| #include <asm/pgtable.h> |
| #include <asm/page.h> |
| #include <asm/spitfire.h> |
| #include <asm/mmu_context.h> |
| #include <asm/mmu.h> |
| #include <asm/pil.h> |
| #include <asm/head.h> |
| #include <asm/thread_info.h> |
| #include <asm/cacheflush.h> |
| |
| /* Basically, most of the Spitfire vs. Cheetah madness |
| * has to do with the fact that Cheetah does not support |
| * IMMU flushes out of the secondary context. Someone needs |
| * to throw a south lake birthday party for the folks |
| * in Microelectronics who refused to fix this shit. |
| */ |
| |
| /* This file is meant to be read efficiently by the CPU, not humans. |
| * Staraj sie tego nikomu nie pierdolnac... |
| */ |
| .text |
| .align 32 |
| .globl __flush_tlb_mm |
| __flush_tlb_mm: /* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */ |
| ldxa [%o1] ASI_DMMU, %g2 |
| cmp %g2, %o0 |
| bne,pn %icc, __spitfire_flush_tlb_mm_slow |
| mov 0x50, %g3 |
| stxa %g0, [%g3] ASI_DMMU_DEMAP |
| stxa %g0, [%g3] ASI_IMMU_DEMAP |
| retl |
| flush %g6 |
| nop |
| nop |
| nop |
| nop |
| nop |
| nop |
| nop |
| nop |
| nop |
| nop |
| |
| .align 32 |
| .globl __flush_tlb_pending |
| __flush_tlb_pending: |
| /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */ |
| rdpr %pstate, %g7 |
| sllx %o1, 3, %o1 |
| andn %g7, PSTATE_IE, %g2 |
| wrpr %g2, %pstate |
| mov SECONDARY_CONTEXT, %o4 |
| ldxa [%o4] ASI_DMMU, %g2 |
| stxa %o0, [%o4] ASI_DMMU |
| 1: sub %o1, (1 << 3), %o1 |
| ldx [%o2 + %o1], %o3 |
| andcc %o3, 1, %g0 |
| andn %o3, 1, %o3 |
| be,pn %icc, 2f |
| or %o3, 0x10, %o3 |
| stxa %g0, [%o3] ASI_IMMU_DEMAP |
| 2: stxa %g0, [%o3] ASI_DMMU_DEMAP |
| membar #Sync |
| brnz,pt %o1, 1b |
| nop |
| stxa %g2, [%o4] ASI_DMMU |
| flush %g6 |
| retl |
| wrpr %g7, 0x0, %pstate |
| nop |
| nop |
| nop |
| nop |
| |
| .align 32 |
| .globl __flush_tlb_kernel_range |
| __flush_tlb_kernel_range: /* %o0=start, %o1=end */ |
| cmp %o0, %o1 |
| be,pn %xcc, 2f |
| sethi %hi(PAGE_SIZE), %o4 |
| sub %o1, %o0, %o3 |
| sub %o3, %o4, %o3 |
| or %o0, 0x20, %o0 ! Nucleus |
| 1: stxa %g0, [%o0 + %o3] ASI_DMMU_DEMAP |
| stxa %g0, [%o0 + %o3] ASI_IMMU_DEMAP |
| membar #Sync |
| brnz,pt %o3, 1b |
| sub %o3, %o4, %o3 |
| 2: retl |
| flush %g6 |
| |
| __spitfire_flush_tlb_mm_slow: |
| rdpr %pstate, %g1 |
| wrpr %g1, PSTATE_IE, %pstate |
| stxa %o0, [%o1] ASI_DMMU |
| stxa %g0, [%g3] ASI_DMMU_DEMAP |
| stxa %g0, [%g3] ASI_IMMU_DEMAP |
| flush %g6 |
| stxa %g2, [%o1] ASI_DMMU |
| flush %g6 |
| retl |
| wrpr %g1, 0, %pstate |
| |
| /* |
| * The following code flushes one page_size worth. |
| */ |
| #if (PAGE_SHIFT == 13) |
| #define ITAG_MASK 0xfe |
| #elif (PAGE_SHIFT == 16) |
| #define ITAG_MASK 0x7fe |
| #else |
| #error unsupported PAGE_SIZE |
| #endif |
| .section .kprobes.text, "ax" |
| .align 32 |
| .globl __flush_icache_page |
| __flush_icache_page: /* %o0 = phys_page */ |
| membar #StoreStore |
| srlx %o0, PAGE_SHIFT, %o0 |
| sethi %uhi(PAGE_OFFSET), %g1 |
| sllx %o0, PAGE_SHIFT, %o0 |
| sethi %hi(PAGE_SIZE), %g2 |
| sllx %g1, 32, %g1 |
| add %o0, %g1, %o0 |
| 1: subcc %g2, 32, %g2 |
| bne,pt %icc, 1b |
| flush %o0 + %g2 |
| retl |
| nop |
| |
| #ifdef DCACHE_ALIASING_POSSIBLE |
| |
| #if (PAGE_SHIFT != 13) |
| #error only page shift of 13 is supported by dcache flush |
| #endif |
| |
| #define DTAG_MASK 0x3 |
| |
| /* This routine is Spitfire specific so the hardcoded |
| * D-cache size and line-size are OK. |
| */ |
| .align 64 |
| .globl __flush_dcache_page |
| __flush_dcache_page: /* %o0=kaddr, %o1=flush_icache */ |
| sethi %uhi(PAGE_OFFSET), %g1 |
| sllx %g1, 32, %g1 |
| sub %o0, %g1, %o0 ! physical address |
| srlx %o0, 11, %o0 ! make D-cache TAG |
| sethi %hi(1 << 14), %o2 ! D-cache size |
| sub %o2, (1 << 5), %o2 ! D-cache line size |
| 1: ldxa [%o2] ASI_DCACHE_TAG, %o3 ! load D-cache TAG |
| andcc %o3, DTAG_MASK, %g0 ! Valid? |
| be,pn %xcc, 2f ! Nope, branch |
| andn %o3, DTAG_MASK, %o3 ! Clear valid bits |
| cmp %o3, %o0 ! TAG match? |
| bne,pt %xcc, 2f ! Nope, branch |
| nop |
| stxa %g0, [%o2] ASI_DCACHE_TAG ! Invalidate TAG |
| membar #Sync |
| 2: brnz,pt %o2, 1b |
| sub %o2, (1 << 5), %o2 ! D-cache line size |
| |
| /* The I-cache does not snoop local stores so we |
| * better flush that too when necessary. |
| */ |
| brnz,pt %o1, __flush_icache_page |
| sllx %o0, 11, %o0 |
| retl |
| nop |
| |
| #endif /* DCACHE_ALIASING_POSSIBLE */ |
| |
| .previous |
| |
| /* Cheetah specific versions, patched at boot time. */ |
| __cheetah_flush_tlb_mm: /* 18 insns */ |
| rdpr %pstate, %g7 |
| andn %g7, PSTATE_IE, %g2 |
| wrpr %g2, 0x0, %pstate |
| wrpr %g0, 1, %tl |
| mov PRIMARY_CONTEXT, %o2 |
| mov 0x40, %g3 |
| ldxa [%o2] ASI_DMMU, %g2 |
| srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o1 |
| sllx %o1, CTX_PGSZ1_NUC_SHIFT, %o1 |
| or %o0, %o1, %o0 /* Preserve nucleus page size fields */ |
| stxa %o0, [%o2] ASI_DMMU |
| stxa %g0, [%g3] ASI_DMMU_DEMAP |
| stxa %g0, [%g3] ASI_IMMU_DEMAP |
| stxa %g2, [%o2] ASI_DMMU |
| flush %g6 |
| wrpr %g0, 0, %tl |
| retl |
| wrpr %g7, 0x0, %pstate |
| |
| __cheetah_flush_tlb_pending: /* 26 insns */ |
| /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */ |
| rdpr %pstate, %g7 |
| sllx %o1, 3, %o1 |
| andn %g7, PSTATE_IE, %g2 |
| wrpr %g2, 0x0, %pstate |
| wrpr %g0, 1, %tl |
| mov PRIMARY_CONTEXT, %o4 |
| ldxa [%o4] ASI_DMMU, %g2 |
| srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o3 |
| sllx %o3, CTX_PGSZ1_NUC_SHIFT, %o3 |
| or %o0, %o3, %o0 /* Preserve nucleus page size fields */ |
| stxa %o0, [%o4] ASI_DMMU |
| 1: sub %o1, (1 << 3), %o1 |
| ldx [%o2 + %o1], %o3 |
| andcc %o3, 1, %g0 |
| be,pn %icc, 2f |
| andn %o3, 1, %o3 |
| stxa %g0, [%o3] ASI_IMMU_DEMAP |
| 2: stxa %g0, [%o3] ASI_DMMU_DEMAP |
| membar #Sync |
| brnz,pt %o1, 1b |
| nop |
| stxa %g2, [%o4] ASI_DMMU |
| flush %g6 |
| wrpr %g0, 0, %tl |
| retl |
| wrpr %g7, 0x0, %pstate |
| |
| #ifdef DCACHE_ALIASING_POSSIBLE |
| __cheetah_flush_dcache_page: /* 11 insns */ |
| sethi %uhi(PAGE_OFFSET), %g1 |
| sllx %g1, 32, %g1 |
| sub %o0, %g1, %o0 |
| sethi %hi(PAGE_SIZE), %o4 |
| 1: subcc %o4, (1 << 5), %o4 |
| stxa %g0, [%o0 + %o4] ASI_DCACHE_INVALIDATE |
| membar #Sync |
| bne,pt %icc, 1b |
| nop |
| retl /* I-cache flush never needed on Cheetah, see callers. */ |
| nop |
| #endif /* DCACHE_ALIASING_POSSIBLE */ |
| |
| cheetah_patch_one: |
| 1: lduw [%o1], %g1 |
| stw %g1, [%o0] |
| flush %o0 |
| subcc %o2, 1, %o2 |
| add %o1, 4, %o1 |
| bne,pt %icc, 1b |
| add %o0, 4, %o0 |
| retl |
| nop |
| |
| .globl cheetah_patch_cachetlbops |
| cheetah_patch_cachetlbops: |
| save %sp, -128, %sp |
| |
| sethi %hi(__flush_tlb_mm), %o0 |
| or %o0, %lo(__flush_tlb_mm), %o0 |
| sethi %hi(__cheetah_flush_tlb_mm), %o1 |
| or %o1, %lo(__cheetah_flush_tlb_mm), %o1 |
| call cheetah_patch_one |
| mov 18, %o2 |
| |
| sethi %hi(__flush_tlb_pending), %o0 |
| or %o0, %lo(__flush_tlb_pending), %o0 |
| sethi %hi(__cheetah_flush_tlb_pending), %o1 |
| or %o1, %lo(__cheetah_flush_tlb_pending), %o1 |
| call cheetah_patch_one |
| mov 26, %o2 |
| |
| #ifdef DCACHE_ALIASING_POSSIBLE |
| sethi %hi(__flush_dcache_page), %o0 |
| or %o0, %lo(__flush_dcache_page), %o0 |
| sethi %hi(__cheetah_flush_dcache_page), %o1 |
| or %o1, %lo(__cheetah_flush_dcache_page), %o1 |
| call cheetah_patch_one |
| mov 11, %o2 |
| #endif /* DCACHE_ALIASING_POSSIBLE */ |
| |
| ret |
| restore |
| |
| #ifdef CONFIG_SMP |
| /* These are all called by the slaves of a cross call, at |
| * trap level 1, with interrupts fully disabled. |
| * |
| * Register usage: |
| * %g5 mm->context (all tlb flushes) |
| * %g1 address arg 1 (tlb page and range flushes) |
| * %g7 address arg 2 (tlb range flush only) |
| * |
| * %g6 ivector table, don't touch |
| * %g2 scratch 1 |
| * %g3 scratch 2 |
| * %g4 scratch 3 |
| * |
| * TODO: Make xcall TLB range flushes use the tricks above... -DaveM |
| */ |
| .align 32 |
| .globl xcall_flush_tlb_mm |
| xcall_flush_tlb_mm: |
| mov PRIMARY_CONTEXT, %g2 |
| ldxa [%g2] ASI_DMMU, %g3 |
| srlx %g3, CTX_PGSZ1_NUC_SHIFT, %g4 |
| sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4 |
| or %g5, %g4, %g5 /* Preserve nucleus page size fields */ |
| stxa %g5, [%g2] ASI_DMMU |
| mov 0x40, %g4 |
| stxa %g0, [%g4] ASI_DMMU_DEMAP |
| stxa %g0, [%g4] ASI_IMMU_DEMAP |
| stxa %g3, [%g2] ASI_DMMU |
| retry |
| |
| .globl xcall_flush_tlb_pending |
| xcall_flush_tlb_pending: |
| /* %g5=context, %g1=nr, %g7=vaddrs[] */ |
| sllx %g1, 3, %g1 |
| mov PRIMARY_CONTEXT, %g4 |
| ldxa [%g4] ASI_DMMU, %g2 |
| srlx %g2, CTX_PGSZ1_NUC_SHIFT, %g4 |
| sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4 |
| or %g5, %g4, %g5 |
| mov PRIMARY_CONTEXT, %g4 |
| stxa %g5, [%g4] ASI_DMMU |
| 1: sub %g1, (1 << 3), %g1 |
| ldx [%g7 + %g1], %g5 |
| andcc %g5, 0x1, %g0 |
| be,pn %icc, 2f |
| |
| andn %g5, 0x1, %g5 |
| stxa %g0, [%g5] ASI_IMMU_DEMAP |
| 2: stxa %g0, [%g5] ASI_DMMU_DEMAP |
| membar #Sync |
| brnz,pt %g1, 1b |
| nop |
| stxa %g2, [%g4] ASI_DMMU |
| retry |
| |
| .globl xcall_flush_tlb_kernel_range |
| xcall_flush_tlb_kernel_range: |
| sethi %hi(PAGE_SIZE - 1), %g2 |
| or %g2, %lo(PAGE_SIZE - 1), %g2 |
| andn %g1, %g2, %g1 |
| andn %g7, %g2, %g7 |
| sub %g7, %g1, %g3 |
| add %g2, 1, %g2 |
| sub %g3, %g2, %g3 |
| or %g1, 0x20, %g1 ! Nucleus |
| 1: stxa %g0, [%g1 + %g3] ASI_DMMU_DEMAP |
| stxa %g0, [%g1 + %g3] ASI_IMMU_DEMAP |
| membar #Sync |
| brnz,pt %g3, 1b |
| sub %g3, %g2, %g3 |
| retry |
| nop |
| nop |
| |
| /* This runs in a very controlled environment, so we do |
| * not need to worry about BH races etc. |
| */ |
| .globl xcall_sync_tick |
| xcall_sync_tick: |
| rdpr %pstate, %g2 |
| wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate |
| rdpr %pil, %g2 |
| wrpr %g0, 15, %pil |
| sethi %hi(109f), %g7 |
| b,pt %xcc, etrap_irq |
| 109: or %g7, %lo(109b), %g7 |
| call smp_synchronize_tick_client |
| nop |
| clr %l6 |
| b rtrap_xcall |
| ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1 |
| |
| /* NOTE: This is SPECIAL!! We do etrap/rtrap however |
| * we choose to deal with the "BH's run with |
| * %pil==15" problem (described in asm/pil.h) |
| * by just invoking rtrap directly past where |
| * BH's are checked for. |
| * |
| * We do it like this because we do not want %pil==15 |
| * lockups to prevent regs being reported. |
| */ |
| .globl xcall_report_regs |
| xcall_report_regs: |
| rdpr %pstate, %g2 |
| wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate |
| rdpr %pil, %g2 |
| wrpr %g0, 15, %pil |
| sethi %hi(109f), %g7 |
| b,pt %xcc, etrap_irq |
| 109: or %g7, %lo(109b), %g7 |
| call __show_regs |
| add %sp, PTREGS_OFF, %o0 |
| clr %l6 |
| /* Has to be a non-v9 branch due to the large distance. */ |
| b rtrap_xcall |
| ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1 |
| |
| #ifdef DCACHE_ALIASING_POSSIBLE |
| .align 32 |
| .globl xcall_flush_dcache_page_cheetah |
| xcall_flush_dcache_page_cheetah: /* %g1 == physical page address */ |
| sethi %hi(PAGE_SIZE), %g3 |
| 1: subcc %g3, (1 << 5), %g3 |
| stxa %g0, [%g1 + %g3] ASI_DCACHE_INVALIDATE |
| membar #Sync |
| bne,pt %icc, 1b |
| nop |
| retry |
| nop |
| #endif /* DCACHE_ALIASING_POSSIBLE */ |
| |
| .globl xcall_flush_dcache_page_spitfire |
| xcall_flush_dcache_page_spitfire: /* %g1 == physical page address |
| %g7 == kernel page virtual address |
| %g5 == (page->mapping != NULL) */ |
| #ifdef DCACHE_ALIASING_POSSIBLE |
| srlx %g1, (13 - 2), %g1 ! Form tag comparitor |
| sethi %hi(L1DCACHE_SIZE), %g3 ! D$ size == 16K |
| sub %g3, (1 << 5), %g3 ! D$ linesize == 32 |
| 1: ldxa [%g3] ASI_DCACHE_TAG, %g2 |
| andcc %g2, 0x3, %g0 |
| be,pn %xcc, 2f |
| andn %g2, 0x3, %g2 |
| cmp %g2, %g1 |
| |
| bne,pt %xcc, 2f |
| nop |
| stxa %g0, [%g3] ASI_DCACHE_TAG |
| membar #Sync |
| 2: cmp %g3, 0 |
| bne,pt %xcc, 1b |
| sub %g3, (1 << 5), %g3 |
| |
| brz,pn %g5, 2f |
| #endif /* DCACHE_ALIASING_POSSIBLE */ |
| sethi %hi(PAGE_SIZE), %g3 |
| |
| 1: flush %g7 |
| subcc %g3, (1 << 5), %g3 |
| bne,pt %icc, 1b |
| add %g7, (1 << 5), %g7 |
| |
| 2: retry |
| nop |
| nop |
| |
| .data |
| |
| errata32_hwbug: |
| .xword 0 |
| |
| .text |
| |
| /* These two are not performance critical... */ |
| .globl xcall_flush_tlb_all_spitfire |
| xcall_flush_tlb_all_spitfire: |
| /* Spitfire Errata #32 workaround. */ |
| sethi %hi(errata32_hwbug), %g4 |
| stx %g0, [%g4 + %lo(errata32_hwbug)] |
| |
| clr %g2 |
| clr %g3 |
| 1: ldxa [%g3] ASI_DTLB_DATA_ACCESS, %g4 |
| and %g4, _PAGE_L, %g5 |
| brnz,pn %g5, 2f |
| mov TLB_TAG_ACCESS, %g7 |
| |
| stxa %g0, [%g7] ASI_DMMU |
| membar #Sync |
| stxa %g0, [%g3] ASI_DTLB_DATA_ACCESS |
| membar #Sync |
| |
| /* Spitfire Errata #32 workaround. */ |
| sethi %hi(errata32_hwbug), %g4 |
| stx %g0, [%g4 + %lo(errata32_hwbug)] |
| |
| 2: ldxa [%g3] ASI_ITLB_DATA_ACCESS, %g4 |
| and %g4, _PAGE_L, %g5 |
| brnz,pn %g5, 2f |
| mov TLB_TAG_ACCESS, %g7 |
| |
| stxa %g0, [%g7] ASI_IMMU |
| membar #Sync |
| stxa %g0, [%g3] ASI_ITLB_DATA_ACCESS |
| membar #Sync |
| |
| /* Spitfire Errata #32 workaround. */ |
| sethi %hi(errata32_hwbug), %g4 |
| stx %g0, [%g4 + %lo(errata32_hwbug)] |
| |
| 2: add %g2, 1, %g2 |
| cmp %g2, SPITFIRE_HIGHEST_LOCKED_TLBENT |
| ble,pt %icc, 1b |
| sll %g2, 3, %g3 |
| flush %g6 |
| retry |
| |
| .globl xcall_flush_tlb_all_cheetah |
| xcall_flush_tlb_all_cheetah: |
| mov 0x80, %g2 |
| stxa %g0, [%g2] ASI_DMMU_DEMAP |
| stxa %g0, [%g2] ASI_IMMU_DEMAP |
| retry |
| |
| /* These just get rescheduled to PIL vectors. */ |
| .globl xcall_call_function |
| xcall_call_function: |
| wr %g0, (1 << PIL_SMP_CALL_FUNC), %set_softint |
| retry |
| |
| .globl xcall_receive_signal |
| xcall_receive_signal: |
| wr %g0, (1 << PIL_SMP_RECEIVE_SIGNAL), %set_softint |
| retry |
| |
| .globl xcall_capture |
| xcall_capture: |
| wr %g0, (1 << PIL_SMP_CAPTURE), %set_softint |
| retry |
| |
| #endif /* CONFIG_SMP */ |
