rt-thread/libcpu/risc-v/t-head/c906/opcode.h

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2022-11-09     WangXiaoyao  Add portable asm support
 */
#ifndef __OPCODE_H__
#define __OPCODE_H__

/**
 * @brief binary opcode pseudo operations
 * Used to bypass toolchain restriction on extension ISA
 * 
 * WARNING: Xuantie ISAs are not compatible to each other in opcode.
 * It's painful to port this file, and should be really careful.
 */

/**
 * @brief RISC-V instruction formats
 */

/** 
 * R type: .insn r opcode6, func3, func7, rd, rs1, rs2
 * 
 * +-------+-----+-----+-------+----+---------+
 * | func7 | rs2 | rs1 | func3 | rd | opcode6 |
 * +-------+-----+-----+-------+----+---------+
 * 31      25    20    15      12   7        0
 */
#define __OPC_INSN_FORMAT_R(opcode, func3, func7, rd, rs1, rs2) \
    ".insn r "RT_STRINGIFY(opcode)","RT_STRINGIFY(func3)","RT_STRINGIFY(func7)","RT_STRINGIFY(rd)","RT_STRINGIFY(rs1)","RT_STRINGIFY(rs2)

/**
 * @brief Xuantie T-HEAD extension ISA format
 * Compatible to Xuantie C906R2S1 user manual v06
 */
#define __OPC_INSN_FORMAT_CACHE(func7, rs2, rs1) \
    __OPC_INSN_FORMAT_R(0x0b, 0x0, func7, x0, rs1, rs2)

#ifdef _TOOLCHAIN_SUPP_XTHEADE_ISA_
#define OPC_SYNC                "sync"
#define OPC_SYNC_I              "sync.i"

#define OPC_DCACHE_CALL         "dcache.call"
#define OPC_DCACHE_IALL         "dcache.iall"
#define OPC_DCACHE_CIALL        "dcache.ciall"

#define OPC_ICACHE_IALL         "icache.iall"

#define OPC_DCACHE_CVA(rs1)     "dcache.cva "RT_STRINGIFY(rs1)
#define OPC_DCACHE_IVA(rs1)     "dcache.iva "RT_STRINGIFY(rs1)
#define OPC_DCACHE_CIVA(rs1)    "dcache.civa "RT_STRINGIFY(rs1)

#define OPC_ICACHE_IVA(rs1)     "icache.iva "RT_STRINGIFY(rs1)
#else /* !_TOOLCHAIN_NOT_SUPP_THEAD_ISA_ */
#define OPC_SYNC                ".long 0x0180000B"
#define OPC_SYNC_I              ".long 0x01A0000B"

#define OPC_DCACHE_CALL         ".long 0x0010000B"
#define OPC_DCACHE_IALL         ".long 0x0020000B"
#define OPC_DCACHE_CIALL        ".long 0x0030000B"

#define OPC_ICACHE_IALL         ".long 0x0100000B"

#define OPC_DCACHE_CVA(rs1)     __OPC_INSN_FORMAT_CACHE(0x1, x4, rs1)
#define OPC_DCACHE_IVA(rs1)     __OPC_INSN_FORMAT_CACHE(0x1, x6, rs1)
#define OPC_DCACHE_CIVA(rs1)    __OPC_INSN_FORMAT_CACHE(0x1, x7, rs1)

#define OPC_ICACHE_IVA(rs1)     __OPC_INSN_FORMAT_CACHE(0x1, x16, rs1)
#endif /* _TOOLCHAIN_NOT_SUPP_THEAD_ISA_ */

#ifdef _TOOLCHAIN_SUPP_ZIFENCEI_ISA_
#define OPC_FENCE_I             "fence.i"
#else /* !_TOOLCHAIN_SUPP_ZIFENCEI_ISA_ */
#define OPC_FENCE_I             ".long 0x0000100F"
#endif /* _TOOLCHAIN_SUPP_ZIFENCEI_ISA_ */

#endif /* __OPCODE_H__ */