1 /* 2 * Tiny Code Generator for QEMU 3 * 4 * Copyright (c) 2009, 2011 Stefan Weil 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 /* 26 * This code implements a TCG which does not generate machine code for some 27 * real target machine but which generates virtual machine code for an 28 * interpreter. Interpreted pseudo code is slow, but it works on any host. 29 * 30 * Some remarks might help in understanding the code: 31 * 32 * "target" or "TCG target" is the machine which runs the generated code. 33 * This is different to the usual meaning in QEMU where "target" is the 34 * emulated machine. So normally QEMU host is identical to TCG target. 35 * Here the TCG target is a virtual machine, but this virtual machine must 36 * use the same word size like the real machine. 37 * Therefore, we need both 32 and 64 bit virtual machines (interpreter). 38 */ 39 40 #if !defined(TCG_TARGET_H) 41 #define TCG_TARGET_H 42 43 #include "config-host.h" 44 45 #define TCG_TARGET_INTERPRETER 1 46 47 #ifdef CONFIG_DEBUG_TCG 48 /* Enable debug output. */ 49 #define CONFIG_DEBUG_TCG_INTERPRETER 50 #endif 51 52 #if 0 /* TCI tries to emulate a little endian host. */ 53 #if defined(HOST_WORDS_BIGENDIAN) 54 # define TCG_TARGET_WORDS_BIGENDIAN 55 #endif 56 #endif 57 58 /* Optional instructions. */ 59 60 #define TCG_TARGET_HAS_bswap16_i32 1 61 #define TCG_TARGET_HAS_bswap32_i32 1 62 /* Not more than one of the next two defines must be 1. */ 63 #define TCG_TARGET_HAS_div_i32 1 64 #define TCG_TARGET_HAS_div2_i32 0 65 #define TCG_TARGET_HAS_ext8s_i32 1 66 #define TCG_TARGET_HAS_ext16s_i32 1 67 #define TCG_TARGET_HAS_ext8u_i32 1 68 #define TCG_TARGET_HAS_ext16u_i32 1 69 #define TCG_TARGET_HAS_andc_i32 0 70 #define TCG_TARGET_HAS_deposit_i32 0 71 #define TCG_TARGET_HAS_eqv_i32 0 72 #define TCG_TARGET_HAS_nand_i32 0 73 #define TCG_TARGET_HAS_nor_i32 0 74 #define TCG_TARGET_HAS_neg_i32 1 75 #define TCG_TARGET_HAS_not_i32 1 76 #define TCG_TARGET_HAS_orc_i32 0 77 #define TCG_TARGET_HAS_rot_i32 1 78 79 #if TCG_TARGET_REG_BITS == 64 80 #define TCG_TARGET_HAS_bswap16_i64 1 81 #define TCG_TARGET_HAS_bswap32_i64 1 82 #define TCG_TARGET_HAS_bswap64_i64 1 83 #define TCG_TARGET_HAS_deposit_i64 0 84 /* Not more than one of the next two defines must be 1. */ 85 #define TCG_TARGET_HAS_div_i64 0 86 #define TCG_TARGET_HAS_div2_i64 0 87 #define TCG_TARGET_HAS_ext8s_i64 1 88 #define TCG_TARGET_HAS_ext16s_i64 1 89 #define TCG_TARGET_HAS_ext32s_i64 1 90 #define TCG_TARGET_HAS_ext8u_i64 1 91 #define TCG_TARGET_HAS_ext16u_i64 1 92 #define TCG_TARGET_HAS_ext32u_i64 1 93 #define TCG_TARGET_HAS_andc_i64 0 94 #define TCG_TARGET_HAS_eqv_i64 0 95 #define TCG_TARGET_HAS_nand_i64 0 96 #define TCG_TARGET_HAS_nor_i64 0 97 #define TCG_TARGET_HAS_neg_i64 1 98 #define TCG_TARGET_HAS_not_i64 1 99 #define TCG_TARGET_HAS_orc_i64 0 100 #define TCG_TARGET_HAS_rot_i64 1 101 #endif /* TCG_TARGET_REG_BITS == 64 */ 102 103 /* Offset to user memory in user mode. */ 104 #define TCG_TARGET_HAS_GUEST_BASE 105 106 /* Number of registers available. 107 For 32 bit hosts, we need more than 8 registers (call arguments). */ 108 /* #define TCG_TARGET_NB_REGS 8 */ 109 #define TCG_TARGET_NB_REGS 16 110 /* #define TCG_TARGET_NB_REGS 32 */ 111 112 /* List of registers which are used by TCG. */ 113 typedef enum { 114 TCG_REG_R0 = 0, 115 TCG_REG_R1, 116 TCG_REG_R2, 117 TCG_REG_R3, 118 TCG_REG_R4, 119 TCG_REG_R5, 120 TCG_REG_R6, 121 TCG_REG_R7, 122 TCG_AREG0 = TCG_REG_R7, 123 #if TCG_TARGET_NB_REGS >= 16 124 TCG_REG_R8, 125 TCG_REG_R9, 126 TCG_REG_R10, 127 TCG_REG_R11, 128 TCG_REG_R12, 129 TCG_REG_R13, 130 TCG_REG_R14, 131 TCG_REG_R15, 132 #if TCG_TARGET_NB_REGS >= 32 133 TCG_REG_R16, 134 TCG_REG_R17, 135 TCG_REG_R18, 136 TCG_REG_R19, 137 TCG_REG_R20, 138 TCG_REG_R21, 139 TCG_REG_R22, 140 TCG_REG_R23, 141 TCG_REG_R24, 142 TCG_REG_R25, 143 TCG_REG_R26, 144 TCG_REG_R27, 145 TCG_REG_R28, 146 TCG_REG_R29, 147 TCG_REG_R30, 148 TCG_REG_R31, 149 #endif 150 #endif 151 /* Special value UINT8_MAX is used by TCI to encode constant values. */ 152 TCG_CONST = UINT8_MAX 153 } TCGReg; 154 155 void tci_disas(uint8_t opc); 156 157 unsigned long tcg_qemu_tb_exec(CPUState *env, uint8_t *tb_ptr); 158 #define tcg_qemu_tb_exec tcg_qemu_tb_exec 159 160 static inline void flush_icache_range(tcg_target_ulong start, 161 tcg_target_ulong stop) 162 { 163 } 164 165 #endif /* TCG_TARGET_H */ 166