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... */ 26tsunami_flush_cache_page: 27tsunami_flush_cache_range: 28 ld [%o0 + 0x0], %o0 /* XXX vma->vm_mm, GROSS XXX */ 29tsunami_flush_cache_mm: 30 ld [%o0 + AOFF_mm_context], %g2 31 cmp %g2, -1 32 be tsunami_flush_cache_out 33tsunami_flush_cache_all: 34 WINDOW_FLUSH(%g4, %g5) 35tsunami_flush_page_for_dma: 36 sta %g0, [%g0] ASI_M_IC_FLCLEAR 37 sta %g0, [%g0] ASI_M_DC_FLCLEAR 38tsunami_flush_cache_out: 39tsunami_flush_page_to_ram: 40 retl 41 nop 42 43tsunami_flush_sig_insns: 44 flush %o1 45 retl 46 flush %o1 + 4 47 48 /* More slick stuff... */ 49tsunami_flush_tlb_range: 50 ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */ 51tsunami_flush_tlb_mm: 52 ld [%o0 + AOFF_mm_context], %g2 53 cmp %g2, -1 54 be tsunami_flush_tlb_out 55tsunami_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 63tsunami_flush_tlb_out: 64 retl 65 nop 66 67 /* This one can be done in a fine grained manner... */ 68tsunami_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 83tsunami_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 98tsunami_copy_1page: 99/* NOTE: This routine has to be shorter than 70insns --jj */ 100 or %g0, (PAGE_SIZE >> 8), %g1 1011: 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 116tsunami_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 1241: 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 134