| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * tsunami.S: High speed MicroSparc-I mmu/cache operations. |
| 4 | * |
| 5 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) |
| 6 | */ |
| 7 | |
| 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 + VMA_VM_MM], %o0 |
| 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 + VMA_VM_MM], %o0 |
| 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 + VMA_VM_MM], %o0 |
| 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 | tsunami_copy_1page: |
| 98 | /* NOTE: This routine has to be shorter than 70insns --jj */ |
| 99 | or %g0, (PAGE_SIZE >> 8), %g1 |
| 100 | 1: |
| 101 | MIRROR_BLOCK(%o0, %o1, 0x00, %o2, %o3, %o4, %o5) |
| 102 | MIRROR_BLOCK(%o0, %o1, 0x20, %o2, %o3, %o4, %o5) |
| 103 | MIRROR_BLOCK(%o0, %o1, 0x40, %o2, %o3, %o4, %o5) |
| 104 | MIRROR_BLOCK(%o0, %o1, 0x60, %o2, %o3, %o4, %o5) |
| 105 | MIRROR_BLOCK(%o0, %o1, 0x80, %o2, %o3, %o4, %o5) |
| 106 | MIRROR_BLOCK(%o0, %o1, 0xa0, %o2, %o3, %o4, %o5) |
| 107 | MIRROR_BLOCK(%o0, %o1, 0xc0, %o2, %o3, %o4, %o5) |
| 108 | MIRROR_BLOCK(%o0, %o1, 0xe0, %o2, %o3, %o4, %o5) |
| 109 | subcc %g1, 1, %g1 |
| 110 | add %o0, 0x100, %o0 |
| 111 | bne 1b |
| 112 | add %o1, 0x100, %o1 |
| 113 | |
| 114 | .globl tsunami_setup_blockops |
| 115 | tsunami_setup_blockops: |
| 116 | sethi %hi(__copy_1page), %o0 |
| 117 | or %o0, %lo(__copy_1page), %o0 |
| 118 | sethi %hi(tsunami_copy_1page), %o1 |
| 119 | or %o1, %lo(tsunami_copy_1page), %o1 |
| 120 | sethi %hi(tsunami_setup_blockops), %o2 |
| 121 | or %o2, %lo(tsunami_setup_blockops), %o2 |
| 122 | ld [%o1], %o4 |
| 123 | 1: add %o1, 4, %o1 |
| 124 | st %o4, [%o0] |
| 125 | add %o0, 4, %o0 |
| 126 | cmp %o1, %o2 |
| 127 | bne 1b |
| 128 | ld [%o1], %o4 |
| 129 | sta %g0, [%g0] ASI_M_IC_FLCLEAR |
| 130 | sta %g0, [%g0] ASI_M_DC_FLCLEAR |
| 131 | retl |
| 132 | nop |