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Annotation of qemu/tcg/tci/tcg-target.h, revision 1.1

1.1     ! root        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(unsigned long start, unsigned long stop)
        !           161: {
        !           162: }
        !           163: 
        !           164: #endif /* TCG_TARGET_H */

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