arch/sparc/mm/tsunami.S

   1 /* $Id: tsunami.S,v 1.7 2001/12/21 04:56:15 davem Exp $
   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 <linux/config.h>
   8 #include <asm/ptrace.h>
   9 #include <asm/asm_offsets.h>
  10 #include <asm/psr.h>
  11 #include <asm/asi.h>
  12 #include <asm/page.h>
  13 #include <asm/pgtsrmmu.h>
  14
  15         .text
  16         .align  4
  17
  18         .globl  tsunami_flush_cache_all, tsunami_flush_cache_mm
  19         .globl  tsunami_flush_cache_range, tsunami_flush_cache_page
  20         .globl  tsunami_flush_page_to_ram, tsunami_flush_page_for_dma
  21         .globl  tsunami_flush_sig_insns
  22         .globl  tsunami_flush_tlb_all, tsunami_flush_tlb_mm
  23         .globl  tsunami_flush_tlb_range, tsunami_flush_tlb_page
  24
  25         /* Sliiick... */
  26 tsunami_flush_cache_page:
  27 tsunami_flush_cache_range:
  28         ld      [%o0 + 0x0], %o0        /* XXX vma->vm_mm, GROSS XXX */
  29 tsunami_flush_cache_mm:
  30         ld      [%o0 + AOFF_mm_context], %g2
  31         cmp     %g2, -1
  32         be      tsunami_flush_cache_out
  33 tsunami_flush_cache_all:
  34         WINDOW_FLUSH(%g4, %g5)
  35 tsunami_flush_page_for_dma:
  36         sta     %g0, [%g0] ASI_M_IC_FLCLEAR
  37         sta     %g0, [%g0] ASI_M_DC_FLCLEAR
  38 tsunami_flush_cache_out:
  39 tsunami_flush_page_to_ram:
  40         retl
  41          nop
  42
  43 tsunami_flush_sig_insns:
  44         flush   %o1
  45         retl
  46          flush  %o1 + 4
  47
  48         /* More slick stuff... */
  49 tsunami_flush_tlb_range:
  50         ld      [%o0 + 0x00], %o0       /* XXX vma->vm_mm GROSS XXX */
  51 tsunami_flush_tlb_mm:
  52         ld      [%o0 + AOFF_mm_context], %g2
  53         cmp     %g2, -1
  54         be      tsunami_flush_tlb_out
  55 tsunami_flush_tlb_all:
  56          mov    0x400, %o1
  57         sta     %g0, [%o1] ASI_M_FLUSH_PROBE
  58         nop
  59         nop
  60         nop
  61         nop
  62         nop
  63 tsunami_flush_tlb_out:
  64         retl
  65          nop
  66
  67         /* This one can be done in a fine grained manner... */
  68 tsunami_flush_tlb_page:
  69         ld      [%o0 + 0x00], %o0       /* XXX vma->vm_mm GROSS XXX */
  70         mov     SRMMU_CTX_REG, %g1
  71         ld      [%o0 + AOFF_mm_context], %o3
  72         andn    %o1, (PAGE_SIZE - 1), %o1
  73         cmp     %o3, -1
  74         be      tsunami_flush_tlb_page_out
  75          lda    [%g1] ASI_M_MMUREGS, %g5
  76         sta     %o3, [%g1] ASI_M_MMUREGS
  77         sta     %g0, [%o1] ASI_M_FLUSH_PROBE
  78         nop
  79         nop
  80         nop
  81         nop
  82         nop
  83 tsunami_flush_tlb_page_out:
  84         retl
  85          sta    %g5, [%g1] ASI_M_MMUREGS
  86
  87 #define MIRROR_BLOCK(dst, src, offset, t0, t1, t2, t3) \
  88         ldd     [src + offset + 0x18], t0; \
  89         std     t0, [dst + offset + 0x18]; \
  90         ldd     [src + offset + 0x10], t2; \
  91         std     t2, [dst + offset + 0x10]; \
  92         ldd     [src + offset + 0x08], t0; \
  93         std     t0, [dst + offset + 0x08]; \
  94         ldd     [src + offset + 0x00], t2; \
  95         std     t2, [dst + offset + 0x00];
  96
  97         .globl  tsunami_copy_1page
  98 tsunami_copy_1page:
  99 /* NOTE: This routine has to be shorter than 70insns --jj */
 100         or      %g0, (PAGE_SIZE >> 8), %g1
 101 1:
 102         MIRROR_BLOCK(%o0, %o1, 0x00, %o2, %o3, %o4, %o5)
 103         MIRROR_BLOCK(%o0, %o1, 0x20, %o2, %o3, %o4, %o5)
 104         MIRROR_BLOCK(%o0, %o1, 0x40, %o2, %o3, %o4, %o5)
 105         MIRROR_BLOCK(%o0, %o1, 0x60, %o2, %o3, %o4, %o5)
 106         MIRROR_BLOCK(%o0, %o1, 0x80, %o2, %o3, %o4, %o5)
 107         MIRROR_BLOCK(%o0, %o1, 0xa0, %o2, %o3, %o4, %o5)
 108         MIRROR_BLOCK(%o0, %o1, 0xc0, %o2, %o3, %o4, %o5)
 109         MIRROR_BLOCK(%o0, %o1, 0xe0, %o2, %o3, %o4, %o5)
 110         subcc   %g1, 1, %g1
 111         add     %o0, 0x100, %o0
 112         bne     1b
 113          add    %o1, 0x100, %o1
 114
 115         .globl  tsunami_setup_blockops
 116 tsunami_setup_blockops:
 117         sethi   %hi(__copy_1page), %o0
 118         or      %o0, %lo(__copy_1page), %o0
 119         sethi   %hi(tsunami_copy_1page), %o1
 120         or      %o1, %lo(tsunami_copy_1page), %o1
 121         sethi   %hi(tsunami_setup_blockops), %o2
 122         or      %o2, %lo(tsunami_setup_blockops), %o2
 123         ld      [%o1], %o4
 124 1:      add     %o1, 4, %o1
 125         st      %o4, [%o0]
 126         add     %o0, 4, %o0
 127         cmp     %o1, %o2
 128         bne     1b
 129         ld      [%o1], %o4
 130         sta     %g0, [%g0] ASI_M_IC_FLCLEAR
 131         sta     %g0, [%g0] ASI_M_DC_FLCLEAR
 132         retl
 133          nop