Root/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... */
25tsunami_flush_cache_page:
26tsunami_flush_cache_range:
27    ld [%o0 + 0x0], %o0 /* XXX vma->vm_mm, GROSS XXX */
28tsunami_flush_cache_mm:
29    ld [%o0 + AOFF_mm_context], %g2
30    cmp %g2, -1
31    be tsunami_flush_cache_out
32tsunami_flush_cache_all:
33    WINDOW_FLUSH(%g4, %g5)
34tsunami_flush_page_for_dma:
35    sta %g0, [%g0] ASI_M_IC_FLCLEAR
36    sta %g0, [%g0] ASI_M_DC_FLCLEAR
37tsunami_flush_cache_out:
38tsunami_flush_page_to_ram:
39    retl
40     nop
41
42tsunami_flush_sig_insns:
43    flush %o1
44    retl
45     flush %o1 + 4
46
47    /* More slick stuff... */
48tsunami_flush_tlb_range:
49    ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */
50tsunami_flush_tlb_mm:
51    ld [%o0 + AOFF_mm_context], %g2
52    cmp %g2, -1
53    be tsunami_flush_tlb_out
54tsunami_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
62tsunami_flush_tlb_out:
63    retl
64     nop
65
66    /* This one can be done in a fine grained manner... */
67tsunami_flush_tlb_page:
68    ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */
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
82tsunami_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
96tsunami_copy_1page:
97/* NOTE: This routine has to be shorter than 70insns --jj */
98    or %g0, (PAGE_SIZE >> 8), %g1
991:
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
114tsunami_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
1221: 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
132

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