filename | src/sh4/mmux86.c |
changeset | 939:6f2302afeb89 |
next | 940:81e0d3051d5f |
author | nkeynes |
date | Sat Jan 03 03:30:26 2009 +0000 (15 years ago) |
branch | lxdream-mem |
permissions | -rw-r--r-- |
last change | MMU work-in-progress * Move SDRAM out into separate sdram.c * Move all page-table management into mmu.c * Convert UTLB management to use the new page-tables * Rip out all calls to mmu_vma_to_phys_* and replace with direct access |
file | annotate | diff | log | raw |
nkeynes@939 | 1 | /** |
nkeynes@939 | 2 | * $Id: mmux86.c 957 2008-12-27 03:14:59Z nkeynes $ |
nkeynes@939 | 3 | * |
nkeynes@939 | 4 | * x86-specific MMU code - this emits simple TLB stubs for TLB indirection. |
nkeynes@939 | 5 | * |
nkeynes@939 | 6 | * Copyright (c) 2008 Nathan Keynes. |
nkeynes@939 | 7 | * |
nkeynes@939 | 8 | * This program is free software; you can redistribute it and/or modify |
nkeynes@939 | 9 | * it under the terms of the GNU General Public License as published by |
nkeynes@939 | 10 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@939 | 11 | * (at your option) any later version. |
nkeynes@939 | 12 | * |
nkeynes@939 | 13 | * This program is distributed in the hope that it will be useful, |
nkeynes@939 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@939 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@939 | 16 | * GNU General Public License for more details. |
nkeynes@939 | 17 | */ |
nkeynes@939 | 18 | |
nkeynes@939 | 19 | #include "lxdream.h" |
nkeynes@939 | 20 | #include "mem.h" |
nkeynes@939 | 21 | #include "sh4/sh4core.h" |
nkeynes@939 | 22 | #include "sh4/sh4mmio.h" |
nkeynes@939 | 23 | #include "sh4/sh4trans.h" |
nkeynes@939 | 24 | #include "sh4/mmu.h" |
nkeynes@939 | 25 | #include "sh4/x86op.h" |
nkeynes@939 | 26 | |
nkeynes@939 | 27 | #if SIZEOF_VOID_P == 8 |
nkeynes@939 | 28 | #define ARG1 R_EDI |
nkeynes@939 | 29 | #define ARG2 R_ESI |
nkeynes@939 | 30 | #define DECODE() \ |
nkeynes@939 | 31 | MOV_imm64_r32((uintptr_t)ext_address_space, R_EAX); /* movq ptr, %rax */ \ |
nkeynes@939 | 32 | REXW(); OP(0x8B); OP(0x0C); OP(0xC8) /* movq [%rax + %rcx*8], %rcx */ |
nkeynes@939 | 33 | #else |
nkeynes@939 | 34 | #define ARG1 R_EAX |
nkeynes@939 | 35 | #define ARG2 R_EDX |
nkeynes@939 | 36 | #define DECODE() \ |
nkeynes@939 | 37 | MOV_r32disp32x4_r32( R_ECX, (uintptr_t)ext_address_space, R_ECX ); |
nkeynes@939 | 38 | #endif |
nkeynes@939 | 39 | |
nkeynes@939 | 40 | void mmu_utlb_init_vtable( struct utlb_entry *ent, struct utlb_page_entry *page, gboolean writable ) |
nkeynes@939 | 41 | { |
nkeynes@939 | 42 | uint32_t mask = ent->mask; |
nkeynes@939 | 43 | uint32_t ppn = ent->ppn & mask; |
nkeynes@939 | 44 | int inc = writable ? 1 : 2; |
nkeynes@939 | 45 | int i; |
nkeynes@939 | 46 | |
nkeynes@939 | 47 | xlat_output = page->code; |
nkeynes@939 | 48 | uint8_t **fn = (uint8_t **)ext_address_space[ppn>>12]; |
nkeynes@939 | 49 | uint8_t **out = (uint8_t **)&page->fn; |
nkeynes@939 | 50 | |
nkeynes@939 | 51 | for( i=0; i<8; i+= inc, fn += inc, out += inc ) { |
nkeynes@939 | 52 | *out = xlat_output; |
nkeynes@939 | 53 | #if SIZEOF_VOID_P == 8 |
nkeynes@939 | 54 | MOV_imm64_r32((uintptr_t)&mmu_urc, R_EAX ); |
nkeynes@939 | 55 | OP(0x83); OP(0x00); OP(0x01); // ADD #1, [RAX] |
nkeynes@939 | 56 | #else |
nkeynes@939 | 57 | OP(0x83); MODRM_r32_disp32(0, (uintptr_t)&mmu_urc); OP(0x01); // ADD #1, mmu_urc |
nkeynes@939 | 58 | #endif |
nkeynes@939 | 59 | AND_imm32_r32( ~mask, ARG1 ); // 6 |
nkeynes@939 | 60 | OR_imm32_r32( ppn, ARG1 ); // 6 |
nkeynes@939 | 61 | if( ent->mask >= 0xFFFFF000 ) { |
nkeynes@939 | 62 | // Maps to a single page, so jump directly there |
nkeynes@939 | 63 | int rel = (*fn - xlat_output); |
nkeynes@939 | 64 | JMP_rel( rel ); // 5 |
nkeynes@939 | 65 | } else { |
nkeynes@939 | 66 | MOV_r32_r32( ARG1, R_ECX ); // 2 |
nkeynes@939 | 67 | SHR_imm8_r32( 12, R_ECX ); // 3 |
nkeynes@939 | 68 | DECODE(); // 14 |
nkeynes@939 | 69 | JMP_r32disp8(R_ECX, (((uintptr_t)out) - ((uintptr_t)&page->fn)) ); // 3 |
nkeynes@939 | 70 | } |
nkeynes@939 | 71 | } |
nkeynes@939 | 72 | } |
nkeynes@939 | 73 | |
nkeynes@939 | 74 | void mmu_utlb_1k_init_vtable( struct utlb_1k_entry *entry ) |
nkeynes@939 | 75 | { |
nkeynes@939 | 76 | xlat_output = entry->code; |
nkeynes@939 | 77 | int i; |
nkeynes@939 | 78 | uint8_t **out = (uint8_t **)&entry->fn; |
nkeynes@939 | 79 | |
nkeynes@939 | 80 | for( i=0; i<8; i++, out++ ) { |
nkeynes@939 | 81 | *out = xlat_output; |
nkeynes@939 | 82 | MOV_r32_r32( ARG1, R_ECX ); |
nkeynes@939 | 83 | SHR_imm8_r32( 10, R_ECX ); |
nkeynes@939 | 84 | AND_imm8s_r32( 0x3, R_ECX ); |
nkeynes@939 | 85 | #if SIZEOF_VOID_P == 8 |
nkeynes@939 | 86 | MOV_imm64_r32( (uintptr_t)&entry->subpages[0], R_EAX ); |
nkeynes@939 | 87 | REXW(); OP(0x8B); OP(0x0C); OP(0xC8); /* movq [%rax + %rcx*8], %rcx */ |
nkeynes@939 | 88 | #else |
nkeynes@939 | 89 | MOV_r32disp32x4_r32( R_ECX, ((uintptr_t)&entry->subpages[0]), R_ECX ); |
nkeynes@939 | 90 | #endif |
nkeynes@939 | 91 | JMP_r32disp8(R_ECX, (((uintptr_t)out) - ((uintptr_t)&entry->fn)) ); // 3 |
nkeynes@939 | 92 | } |
nkeynes@939 | 93 | |
nkeynes@939 | 94 | out = (uint8_t **)&entry->user_fn; |
nkeynes@939 | 95 | for( i=0; i<8; i++, out++ ) { |
nkeynes@939 | 96 | *out = xlat_output; |
nkeynes@939 | 97 | MOV_r32_r32( ARG1, R_ECX ); |
nkeynes@939 | 98 | SHR_imm8_r32( 10, R_ECX ); |
nkeynes@939 | 99 | AND_imm8s_r32( 0x3, R_ECX ); |
nkeynes@939 | 100 | #if SIZEOF_VOID_P == 8 |
nkeynes@939 | 101 | MOV_imm64_r32( (uintptr_t)&entry->user_subpages[0], R_EAX ); |
nkeynes@939 | 102 | REXW(); OP(0x8B); OP(0x0C); OP(0xC8); /* movq [%rax + %rcx*8], %rcx */ |
nkeynes@939 | 103 | #else |
nkeynes@939 | 104 | MOV_r32disp32x4_r32( R_ECX, ((uintptr_t)&entry->user_subpages[0]), R_ECX ); |
nkeynes@939 | 105 | #endif |
nkeynes@939 | 106 | JMP_r32disp8(R_ECX, (((uintptr_t)out) - ((uintptr_t)&entry->user_fn)) ); // 3 |
nkeynes@939 | 107 | } |
nkeynes@939 | 108 | |
nkeynes@939 | 109 | } |
.