armv8_opcodes.c

Go to the documentation of this file.

// SPDX-License-Identifier: GPL-2.0-or-later
 
/*
 * Copyright (C) 2015 by Matthias Welwarsky <matthias.welwarsky@sysgo.com>
 */
 
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
#include <stdint.h>
#include <stdbool.h>
 
#include "armv8.h"
#include "armv8_opcodes.h"
 
static const uint32_t a64_opcodes[ARMV8_OPC_NUM] = {
        [READ_REG_CTR]      = ARMV8_MRS(SYSTEM_CTR, 0),
        [READ_REG_CLIDR]    = ARMV8_MRS(SYSTEM_CLIDR, 0),
        [READ_REG_CSSELR]   = ARMV8_MRS(SYSTEM_CSSELR, 0),
        [READ_REG_CCSIDR]   = ARMV8_MRS(SYSTEM_CCSIDR, 0),
        [WRITE_REG_CSSELR]  = ARMV8_MSR_GP(SYSTEM_CSSELR, 0),
        [READ_REG_MPIDR]    = ARMV8_MRS(SYSTEM_MPIDR, 0),
        [READ_REG_DTRRX]    = ARMV8_MRS(SYSTEM_DBG_DTRRX_EL0, 0),
        [WRITE_REG_DTRTX]   = ARMV8_MSR_GP(SYSTEM_DBG_DTRTX_EL0, 0),
        [WRITE_REG_DSPSR]   = ARMV8_MSR_DSPSR(0),
        [READ_REG_DSPSR]    = ARMV8_MRS_DSPSR(0),
        [ARMV8_OPC_DSB_SY]  = ARMV8_DSB_SY,
        [ARMV8_OPC_DCPS]    = ARMV8_DCPS(0, 11),
        [ARMV8_OPC_DRPS]    = ARMV8_DRPS,
        [ARMV8_OPC_ISB_SY]  = ARMV8_ISB,
        [ARMV8_OPC_DCCISW]  = ARMV8_SYS(SYSTEM_DCCISW, 0),
        [ARMV8_OPC_DCCIVAC] = ARMV8_SYS(SYSTEM_DCCIVAC, 0),
        [ARMV8_OPC_ICIVAU]  = ARMV8_SYS(SYSTEM_ICIVAU, 0),
        [ARMV8_OPC_HLT]     = ARMV8_HLT(11),
        [ARMV8_OPC_LDRB_IP] = ARMV8_LDRB_IP(1, 0),
        [ARMV8_OPC_LDRH_IP] = ARMV8_LDRH_IP(1, 0),
        [ARMV8_OPC_LDRW_IP] = ARMV8_LDRW_IP(1, 0),
        [ARMV8_OPC_STRB_IP] = ARMV8_STRB_IP(1, 0),
        [ARMV8_OPC_STRH_IP] = ARMV8_STRH_IP(1, 0),
        [ARMV8_OPC_STRW_IP] = ARMV8_STRW_IP(1, 0),
};
 
static const uint32_t t32_opcodes[ARMV8_OPC_NUM] = {
        [READ_REG_CTR]      = ARMV4_5_MRC(15, 0, 0, 0, 0, 1),
        [READ_REG_CLIDR]    = ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
        [READ_REG_CSSELR]   = ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
        [READ_REG_CCSIDR]   = ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
        [WRITE_REG_CSSELR]  = ARMV4_5_MCR(15, 2, 0, 0, 0, 0),
        [READ_REG_MPIDR]    = ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
        [READ_REG_DTRRX]    = ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
        [WRITE_REG_DTRTX]   = ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
        [WRITE_REG_DSPSR]   = ARMV8_MCR_DSPSR(0),
        [READ_REG_DSPSR]    = ARMV8_MRC_DSPSR(0),
        [ARMV8_OPC_DSB_SY]  = ARMV8_DSB_SY_T1,
        [ARMV8_OPC_DCPS]    = ARMV8_DCPS_T1(0),
        [ARMV8_OPC_DRPS]    = ARMV8_ERET_T1,
        [ARMV8_OPC_ISB_SY]  = ARMV8_ISB_SY_T1,
        [ARMV8_OPC_DCCISW]  = ARMV4_5_MCR(15, 0, 0, 7, 14, 2),
        [ARMV8_OPC_DCCIVAC] = ARMV4_5_MCR(15, 0, 0, 7, 14, 1),
        [ARMV8_OPC_ICIVAU]  = ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
        [ARMV8_OPC_HLT]     = ARMV8_HLT_T1(11),
        [ARMV8_OPC_LDRB_IP] = ARMV8_LDRB_IP_T3(1, 0),
        [ARMV8_OPC_LDRH_IP] = ARMV8_LDRH_IP_T3(1, 0),
        [ARMV8_OPC_LDRW_IP] = ARMV8_LDRW_IP_T3(1, 0),
        [ARMV8_OPC_STRB_IP] = ARMV8_STRB_IP_T3(1, 0),
        [ARMV8_OPC_STRH_IP] = ARMV8_STRH_IP_T3(1, 0),
        [ARMV8_OPC_STRW_IP] = ARMV8_STRW_IP_T3(1, 0),
};
 
void armv8_select_opcodes(struct armv8_common *armv8, bool state_is_aarch64)
{
    if (state_is_aarch64)
        armv8->opcodes = &a64_opcodes[0];
    else
        armv8->opcodes = &t32_opcodes[0];
}
 
uint32_t armv8_opcode(struct armv8_common *armv8, enum armv8_opcode code)
{
    if ((int)code >= ARMV8_OPC_NUM)
        return -1;
 
    return *(armv8->opcodes + code);
}