arch/sparc/mm/tsunami.S

   1 /*
   2  * tsunami.S: High speed MicroSparc-I mmu/cache operations.
   3  *
   4  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6
   7 #include <asm/ptrace.h>
   8 #include <asm/asm-offsets.h>
   9 #include <asm/psr.h>
  10 #include <asm/asi.h>
  11 #include <asm/page.h>
  12 #include <asm/pgtsrmmu.h>
  13
  14         .text
  15         .align  4
  16
  17         .globl  tsunami_flush_cache_all, tsunami_flush_cache_mm
  18         .globl  tsunami_flush_cache_range, tsunami_flush_cache_page
  19         .globl  tsunami_flush_page_to_ram, tsunami_flush_page_for_dma
  20         .globl  tsunami_flush_sig_insns
  21         .globl  tsunami_flush_tlb_all, tsunami_flush_tlb_mm
  22         .globl  tsunami_flush_tlb_range, tsunami_flush_tlb_page
  23
  24         /* Sliiick... */
  25 tsunami_flush_cache_page:
  26 tsunami_flush_cache_range:
  27         ld      [%o0 + VMA_VM_MM], %o0
  28 tsunami_flush_cache_mm:
  29         ld      [%o0 + AOFF_mm_context], %g2
  30         cmp     %g2, -1
  31         be      tsunami_flush_cache_out
  32 tsunami_flush_cache_all:
  33         WINDOW_FLUSH(%g4, %g5)
  34 tsunami_flush_page_for_dma:
  35         sta     %g0, [%g0] ASI_M_IC_FLCLEAR
  36         sta     %g0, [%g0] ASI_M_DC_FLCLEAR
  37 tsunami_flush_cache_out:
  38 tsunami_flush_page_to_ram:
  39         retl
  40          nop
  41
  42 tsunami_flush_sig_insns:
  43         flush   %o1
  44         retl
  45          flush  %o1 + 4
  46
  47         /* More slick stuff... */
  48 tsunami_flush_tlb_range:
  49         ld      [%o0 + VMA_VM_MM], %o0
  50 tsunami_flush_tlb_mm:
  51         ld      [%o0 + AOFF_mm_context], %g2
  52         cmp     %g2, -1
  53         be      tsunami_flush_tlb_out
  54 tsunami_flush_tlb_all:
  55          mov    0x400, %o1
  56         sta     %g0, [%o1] ASI_M_FLUSH_PROBE
  57         nop
  58         nop
  59         nop
  60         nop
  61         nop
  62 tsunami_flush_tlb_out:
  63         retl
  64          nop
  65
  66         /* This one can be done in a fine grained manner... */
  67 tsunami_flush_tlb_page:
  68         ld      [%o0 + VMA_VM_MM], %o0
  69         mov     SRMMU_CTX_REG, %g1
  70         ld      [%o0 + AOFF_mm_context], %o3
  71         andn    %o1, (PAGE_SIZE - 1), %o1
  72         cmp     %o3, -1
  73         be      tsunami_flush_tlb_page_out
  74          lda    [%g1] ASI_M_MMUREGS, %g5
  75         sta     %o3, [%g1] ASI_M_MMUREGS
  76         sta     %g0, [%o1] ASI_M_FLUSH_PROBE
  77         nop
  78         nop
  79         nop
  80         nop
  81         nop
  82 tsunami_flush_tlb_page_out:
  83         retl
  84          sta    %g5, [%g1] ASI_M_MMUREGS
  85
  86 #define MIRROR_BLOCK(dst, src, offset, t0, t1, t2, t3) \
  87         ldd     [src + offset + 0x18], t0; \
  88         std     t0, [dst + offset + 0x18]; \
  89         ldd     [src + offset + 0x10], t2; \
  90         std     t2, [dst + offset + 0x10]; \
  91         ldd     [src + offset + 0x08], t0; \
  92         std     t0, [dst + offset + 0x08]; \
  93         ldd     [src + offset + 0x00], t2; \
  94         std     t2, [dst + offset + 0x00];
  95
  96 tsunami_copy_1page:
  97 /* NOTE: This routine has to be shorter than 70insns --jj */
  98         or      %g0, (PAGE_SIZE >> 8), %g1
  99 1:
 100         MIRROR_BLOCK(%o0, %o1, 0x00, %o2, %o3, %o4, %o5)
 101         MIRROR_BLOCK(%o0, %o1, 0x20, %o2, %o3, %o4, %o5)
 102         MIRROR_BLOCK(%o0, %o1, 0x40, %o2, %o3, %o4, %o5)
 103         MIRROR_BLOCK(%o0, %o1, 0x60, %o2, %o3, %o4, %o5)
 104         MIRROR_BLOCK(%o0, %o1, 0x80, %o2, %o3, %o4, %o5)
 105         MIRROR_BLOCK(%o0, %o1, 0xa0, %o2, %o3, %o4, %o5)
 106         MIRROR_BLOCK(%o0, %o1, 0xc0, %o2, %o3, %o4, %o5)
 107         MIRROR_BLOCK(%o0, %o1, 0xe0, %o2, %o3, %o4, %o5)
 108         subcc   %g1, 1, %g1
 109         add     %o0, 0x100, %o0
 110         bne     1b
 111          add    %o1, 0x100, %o1
 112
 113         .globl  tsunami_setup_blockops
 114 tsunami_setup_blockops:
 115         sethi   %hi(__copy_1page), %o0
 116         or      %o0, %lo(__copy_1page), %o0
 117         sethi   %hi(tsunami_copy_1page), %o1
 118         or      %o1, %lo(tsunami_copy_1page), %o1
 119         sethi   %hi(tsunami_setup_blockops), %o2
 120         or      %o2, %lo(tsunami_setup_blockops), %o2
 121         ld      [%o1], %o4
 122 1:      add     %o1, 4, %o1
 123         st      %o4, [%o0]
 124         add     %o0, 4, %o0
 125         cmp     %o1, %o2
 126         bne     1b
 127         ld      [%o1], %o4
 128         sta     %g0, [%g0] ASI_M_IC_FLCLEAR
 129         sta     %g0, [%g0] ASI_M_DC_FLCLEAR
 130         retl
 131          nop