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   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_CLIDR]        = ARMV8_MRS(SYSTEM_CLIDR, 0),
  28                 [READ_REG_CSSELR]       = ARMV8_MRS(SYSTEM_CSSELR, 0),
  29                 [READ_REG_CCSIDR]       = ARMV8_MRS(SYSTEM_CCSIDR, 0),
  30                 [WRITE_REG_CSSELR]      = ARMV8_MSR_GP(SYSTEM_CSSELR, 0),
  31                 [READ_REG_MPIDR]        = ARMV8_MRS(SYSTEM_MPIDR, 0),
  32                 [READ_REG_DTRRX]        = ARMV8_MRS(SYSTEM_DBG_DTRRX_EL0, 0),
  33                 [WRITE_REG_DTRTX]       = ARMV8_MSR_GP(SYSTEM_DBG_DTRTX_EL0, 0),
  34                 [WRITE_REG_DSPSR]       = ARMV8_MSR_DSPSR(0),
  35                 [READ_REG_DSPSR]        = ARMV8_MRS_DSPSR(0),
  36                 [ARMV8_OPC_DSB_SY]      = ARMV8_DSB_SY,
  37                 [ARMV8_OPC_DCPS]        = ARMV8_DCPS(0, 11),
  38                 [ARMV8_OPC_DRPS]        = ARMV8_DRPS,
  39 };
  40
  41 static const uint32_t t32_opcodes[ARMV8_OPC_NUM] = {
  42                 [READ_REG_CLIDR]        = ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
  43                 [READ_REG_CSSELR]       = ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
  44                 [READ_REG_CCSIDR]       = ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
  45                 [WRITE_REG_CSSELR]      = ARMV4_5_MCR(15, 2, 0, 0, 0, 0),
  46                 [READ_REG_MPIDR]        = ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
  47                 [READ_REG_DTRRX]        = ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
  48                 [WRITE_REG_DTRTX]       = ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
  49                 [WRITE_REG_DSPSR]       = ARMV8_MCR_DSPSR(0),
  50                 [READ_REG_DSPSR]        = ARMV8_MRC_DSPSR(0),
  51                 [ARMV8_OPC_DSB_SY]      = ARMV8_DSB_SY_T1,
  52                 [ARMV8_OPC_DCPS]        = ARMV8_DCPS_T1(0),
  53                 [ARMV8_OPC_DRPS]        = ARMV8_ERET_T1,
  54 };
  55
  56 void armv8_select_opcodes(struct armv8_common *armv8, bool state_is_aarch64)
  57 {
  58         if (state_is_aarch64)
  59                 armv8->opcodes = &a64_opcodes[0];
  60         else
  61                 armv8->opcodes = &t32_opcodes[0];
  62 }
  63
  64 uint32_t armv8_opcode(struct armv8_common *armv8, enum armv8_opcode code)
  65 {
  66         if ((int)code >= ARMV8_OPC_NUM)
  67                 return -1;
  68
  69         return *(armv8->opcodes + code);
  70 }