src/target/armv8_opcodes.c

   1 /*
   2  * Copyright (C) 2015 by Matthias Welwarsky <matthias.welwarsky@sysgo.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  */
  15
  16 #ifdef HAVE_CONFIG_H
  17 #include "config.h"
  18 #endif
  19
  20 #include <stdint.h>
  21 #include <stdbool.h>
  22
  23 #include "armv8.h"
  24 #include "armv8_opcodes.h"
  25
  26 static const uint32_t a64_opcodes[ARMV8_OPC_NUM] = {
  27                 [READ_REG_CTR]          = ARMV8_MRS(SYSTEM_CTR, 0),
  28                 [READ_REG_CLIDR]        = ARMV8_MRS(SYSTEM_CLIDR, 0),
  29                 [READ_REG_CSSELR]       = ARMV8_MRS(SYSTEM_CSSELR, 0),
  30                 [READ_REG_CCSIDR]       = ARMV8_MRS(SYSTEM_CCSIDR, 0),
  31                 [WRITE_REG_CSSELR]      = ARMV8_MSR_GP(SYSTEM_CSSELR, 0),
  32                 [READ_REG_MPIDR]        = ARMV8_MRS(SYSTEM_MPIDR, 0),
  33                 [READ_REG_DTRRX]        = ARMV8_MRS(SYSTEM_DBG_DTRRX_EL0, 0),
  34                 [WRITE_REG_DTRTX]       = ARMV8_MSR_GP(SYSTEM_DBG_DTRTX_EL0, 0),
  35                 [WRITE_REG_DSPSR]       = ARMV8_MSR_DSPSR(0),
  36                 [READ_REG_DSPSR]        = ARMV8_MRS_DSPSR(0),
  37                 [ARMV8_OPC_DSB_SY]      = ARMV8_DSB_SY,
  38                 [ARMV8_OPC_DCPS]        = ARMV8_DCPS(0, 11),
  39                 [ARMV8_OPC_DRPS]        = ARMV8_DRPS,
  40                 [ARMV8_OPC_ISB_SY]      = ARMV8_ISB,
  41 };
  42
  43 static const uint32_t t32_opcodes[ARMV8_OPC_NUM] = {
  44                 [READ_REG_CTR]          = ARMV4_5_MRC(15, 0, 0, 0, 0, 1),
  45                 [READ_REG_CLIDR]        = ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
  46                 [READ_REG_CSSELR]       = ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
  47                 [READ_REG_CCSIDR]       = ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
  48                 [WRITE_REG_CSSELR]      = ARMV4_5_MCR(15, 2, 0, 0, 0, 0),
  49                 [READ_REG_MPIDR]        = ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
  50                 [READ_REG_DTRRX]        = ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
  51                 [WRITE_REG_DTRTX]       = ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
  52                 [WRITE_REG_DSPSR]       = ARMV8_MCR_DSPSR(0),
  53                 [READ_REG_DSPSR]        = ARMV8_MRC_DSPSR(0),
  54                 [ARMV8_OPC_DSB_SY]      = ARMV8_DSB_SY_T1,
  55                 [ARMV8_OPC_DCPS]        = ARMV8_DCPS_T1(0),
  56                 [ARMV8_OPC_DRPS]        = ARMV8_ERET_T1,
  57                 [ARMV8_OPC_ISB_SY]      = ARMV8_ISB_SY_T1,
  58 };
  59
  60 void armv8_select_opcodes(struct armv8_common *armv8, bool state_is_aarch64)
  61 {
  62         if (state_is_aarch64)
  63                 armv8->opcodes = &a64_opcodes[0];
  64         else
  65                 armv8->opcodes = &t32_opcodes[0];
  66 }
  67
  68 uint32_t armv8_opcode(struct armv8_common *armv8, enum armv8_opcode code)
  69 {
  70         if ((int)code >= ARMV8_OPC_NUM)
  71                 return -1;
  72
  73         return *(armv8->opcodes + code);
  74 }