006f8638c6
This will be used to size the TLB when more than 8 MMU modes are used by the target. Limitations come from the limited size of the immediate fields (which sometimes, as in the case of Aarch64, extend to instructions that shift the immediate). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <1424436345-37924-2-git-send-email-pbonzini@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Alexander Graf <agraf@suse.de>
186 lines
5.9 KiB
C
186 lines
5.9 KiB
C
/*
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* Tiny Code Generator for QEMU
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*
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* Copyright (c) 2009, 2011 Stefan Weil
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* This code implements a TCG which does not generate machine code for some
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* real target machine but which generates virtual machine code for an
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* interpreter. Interpreted pseudo code is slow, but it works on any host.
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*
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* Some remarks might help in understanding the code:
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*
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* "target" or "TCG target" is the machine which runs the generated code.
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* This is different to the usual meaning in QEMU where "target" is the
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* emulated machine. So normally QEMU host is identical to TCG target.
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* Here the TCG target is a virtual machine, but this virtual machine must
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* use the same word size like the real machine.
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* Therefore, we need both 32 and 64 bit virtual machines (interpreter).
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*/
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#if !defined(TCG_TARGET_H)
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#define TCG_TARGET_H
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#include "config-host.h"
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#define TCG_TARGET_INTERPRETER 1
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#define TCG_TARGET_INSN_UNIT_SIZE 1
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#define TCG_TARGET_TLB_DISPLACEMENT_BITS 32
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#if UINTPTR_MAX == UINT32_MAX
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# define TCG_TARGET_REG_BITS 32
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#elif UINTPTR_MAX == UINT64_MAX
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# define TCG_TARGET_REG_BITS 64
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#else
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# error Unknown pointer size for tci target
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#endif
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#ifdef CONFIG_DEBUG_TCG
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/* Enable debug output. */
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#define CONFIG_DEBUG_TCG_INTERPRETER
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#endif
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/* Optional instructions. */
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#define TCG_TARGET_HAS_bswap16_i32 1
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#define TCG_TARGET_HAS_bswap32_i32 1
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#define TCG_TARGET_HAS_div_i32 1
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#define TCG_TARGET_HAS_rem_i32 1
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#define TCG_TARGET_HAS_ext8s_i32 1
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#define TCG_TARGET_HAS_ext16s_i32 1
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#define TCG_TARGET_HAS_ext8u_i32 1
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#define TCG_TARGET_HAS_ext16u_i32 1
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#define TCG_TARGET_HAS_andc_i32 0
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#define TCG_TARGET_HAS_deposit_i32 1
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#define TCG_TARGET_HAS_eqv_i32 0
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#define TCG_TARGET_HAS_nand_i32 0
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#define TCG_TARGET_HAS_nor_i32 0
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#define TCG_TARGET_HAS_neg_i32 1
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#define TCG_TARGET_HAS_not_i32 1
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#define TCG_TARGET_HAS_orc_i32 0
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#define TCG_TARGET_HAS_rot_i32 1
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#define TCG_TARGET_HAS_movcond_i32 0
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#define TCG_TARGET_HAS_muls2_i32 0
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#define TCG_TARGET_HAS_muluh_i32 0
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#define TCG_TARGET_HAS_mulsh_i32 0
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#if TCG_TARGET_REG_BITS == 64
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#define TCG_TARGET_HAS_trunc_shr_i32 0
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#define TCG_TARGET_HAS_bswap16_i64 1
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#define TCG_TARGET_HAS_bswap32_i64 1
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#define TCG_TARGET_HAS_bswap64_i64 1
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#define TCG_TARGET_HAS_deposit_i64 1
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#define TCG_TARGET_HAS_div_i64 0
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#define TCG_TARGET_HAS_rem_i64 0
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#define TCG_TARGET_HAS_ext8s_i64 1
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#define TCG_TARGET_HAS_ext16s_i64 1
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#define TCG_TARGET_HAS_ext32s_i64 1
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#define TCG_TARGET_HAS_ext8u_i64 1
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#define TCG_TARGET_HAS_ext16u_i64 1
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#define TCG_TARGET_HAS_ext32u_i64 1
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#define TCG_TARGET_HAS_andc_i64 0
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#define TCG_TARGET_HAS_eqv_i64 0
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#define TCG_TARGET_HAS_nand_i64 0
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#define TCG_TARGET_HAS_nor_i64 0
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#define TCG_TARGET_HAS_neg_i64 1
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#define TCG_TARGET_HAS_not_i64 1
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#define TCG_TARGET_HAS_orc_i64 0
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#define TCG_TARGET_HAS_rot_i64 1
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#define TCG_TARGET_HAS_movcond_i64 0
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#define TCG_TARGET_HAS_muls2_i64 0
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#define TCG_TARGET_HAS_add2_i32 0
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#define TCG_TARGET_HAS_sub2_i32 0
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#define TCG_TARGET_HAS_mulu2_i32 0
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#define TCG_TARGET_HAS_add2_i64 0
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#define TCG_TARGET_HAS_sub2_i64 0
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#define TCG_TARGET_HAS_mulu2_i64 0
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#define TCG_TARGET_HAS_muluh_i64 0
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#define TCG_TARGET_HAS_mulsh_i64 0
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#else
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#define TCG_TARGET_HAS_mulu2_i32 1
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#endif /* TCG_TARGET_REG_BITS == 64 */
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/* Number of registers available.
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For 32 bit hosts, we need more than 8 registers (call arguments). */
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/* #define TCG_TARGET_NB_REGS 8 */
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#define TCG_TARGET_NB_REGS 16
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/* #define TCG_TARGET_NB_REGS 32 */
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/* List of registers which are used by TCG. */
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typedef enum {
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TCG_REG_R0 = 0,
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TCG_REG_R1,
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TCG_REG_R2,
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TCG_REG_R3,
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TCG_REG_R4,
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TCG_REG_R5,
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TCG_REG_R6,
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TCG_REG_R7,
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#if TCG_TARGET_NB_REGS >= 16
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TCG_REG_R8,
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TCG_REG_R9,
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TCG_REG_R10,
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TCG_REG_R11,
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TCG_REG_R12,
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TCG_REG_R13,
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TCG_REG_R14,
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TCG_REG_R15,
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#if TCG_TARGET_NB_REGS >= 32
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TCG_REG_R16,
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TCG_REG_R17,
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TCG_REG_R18,
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TCG_REG_R19,
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TCG_REG_R20,
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TCG_REG_R21,
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TCG_REG_R22,
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TCG_REG_R23,
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TCG_REG_R24,
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TCG_REG_R25,
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TCG_REG_R26,
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TCG_REG_R27,
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TCG_REG_R28,
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TCG_REG_R29,
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TCG_REG_R30,
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TCG_REG_R31,
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#endif
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#endif
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/* Special value UINT8_MAX is used by TCI to encode constant values. */
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TCG_CONST = UINT8_MAX
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} TCGReg;
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#define TCG_AREG0 (TCG_TARGET_NB_REGS - 2)
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/* Used for function call generation. */
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#define TCG_REG_CALL_STACK (TCG_TARGET_NB_REGS - 1)
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#define TCG_TARGET_CALL_STACK_OFFSET 0
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#define TCG_TARGET_STACK_ALIGN 16
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void tci_disas(uint8_t opc);
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#define HAVE_TCG_QEMU_TB_EXEC
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static inline void flush_icache_range(uintptr_t start, uintptr_t stop)
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{
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}
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#endif /* TCG_TARGET_H */
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