src/target/armv8_dpm.h

   1 /*
   2  * Copyright (C) 2009 by David Brownell
   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 #ifndef OPENOCD_TARGET_ARMV8_DPM_H
  16 #define OPENOCD_TARGET_ARMV8_DPM_H
  17
  18 #include "arm_dpm.h"
  19 #include "helper/bits.h"
  20
  21 /* forward-declare struct armv8_common */
  22 struct armv8_common;
  23
  24 /**
  25  * This wraps an implementation of DPM primitives.  Each interface
  26  * provider supplies a structure like this, which is the glue between
  27  * upper level code and the lower level hardware access.
  28  *
  29  * It is a PRELIMINARY AND INCOMPLETE set of primitives, starting with
  30  * support for CPU register access.
  31  */
  32 int armv8_dpm_setup(struct arm_dpm *dpm);
  33 int armv8_dpm_initialize(struct arm_dpm *dpm);
  34
  35 int armv8_dpm_read_current_registers(struct arm_dpm *dpm);
  36 int armv8_dpm_modeswitch(struct arm_dpm *dpm, enum arm_mode mode);
  37
  38
  39 int armv8_dpm_write_dirty_registers(struct arm_dpm *dpm, bool bpwp);
  40
  41 /* DSCR bits; see ARMv7a arch spec section C10.3.1.
  42  * Not all v7 bits are valid in v6.
  43  */
  44 #define DSCR_DEBUG_STATUS_MASK          (0x1F <<  0)
  45 #define DSCR_ERR                                        (0x1 <<  6)
  46 #define DSCR_SYS_ERROR_PEND                     (0x1 <<  7)
  47 #define DSCR_CUR_EL                                     (0x3 <<  8)
  48 #define DSCR_EL_STATUS_MASK                     (0xF << 10)
  49 #define DSCR_HDE                                        (0x1 << 14)
  50 #define DSCR_SDD                                        (0x1 << 16)
  51 #define DSCR_NON_SECURE             (0x1 << 18)
  52 #define DSCR_MA                                         (0x1 << 20)
  53 #define DSCR_TDA                                        (0x1 << 21)
  54 #define DSCR_INTDIS_MASK                        (0x3 << 22)
  55 #define DSCR_ITE                                        (0x1 << 24)
  56 #define DSCR_PIPE_ADVANCE           (0x1 << 25)
  57 #define DSCR_TXU                                        (0x1 << 26)
  58 #define DSCR_RTO                                        (0x1 << 27) /* bit 28 is reserved */
  59 #define DSCR_ITO                                        (0x1 << 28)
  60 #define DSCR_DTR_TX_FULL            (0x1 << 29)
  61 #define DSCR_DTR_RX_FULL            (0x1 << 30) /* bit 31 is reserved */
  62
  63
  64
  65 /* Methods of entry into debug mode */
  66 #define DSCRV8_ENTRY_NON_DEBUG                  (0x2)
  67 #define DSCRV8_ENTRY_RESTARTING                 (0x1)
  68 #define DSCRV8_ENTRY_BKPT                               (0x7)
  69 #define DSCRV8_ENTRY_EXT_DEBUG                  (0x13)
  70 #define DSCRV8_ENTRY_HALT_STEP_NORMAL   (0x1B)
  71 #define DSCRV8_ENTRY_HALT_STEP_EXECLU   (0x1F)
  72 #define DSCRV8_ENTRY_OS_UNLOCK                  (0x23)
  73 #define DSCRV8_ENTRY_RESET_CATCH                (0x27)
  74 #define DSCRV8_ENTRY_WATCHPOINT                 (0x2B)
  75 #define DSCRV8_ENTRY_HLT                                (0x2F)
  76 #define DSCRV8_ENTRY_SW_ACCESS_DBG              (0x33)
  77 #define DSCRV8_ENTRY_EXCEPTION_CATCH    (0x37)
  78 #define DSCRV8_ENTRY_HALT_STEP                  (0x3B)
  79 #define DSCRV8_HALT_MASK                        (0x3C)
  80
  81 /*DRCR registers*/
  82 #define DRCR_CSE                                (1 << 2)
  83 #define DRCR_CSPA                               (1 << 3)
  84 #define DRCR_CBRRQ                              (1 << 4)
  85
  86
  87 /* DTR modes */
  88 #define DSCR_EXT_DCC_NON_BLOCKING     (0x0 << 20)
  89 #define DSCR_EXT_DCC_STALL_MODE       (0x1 << 20)
  90 #define DSCR_EXT_DCC_FAST_MODE        (0x2 << 20)  /* bits 22, 23 are reserved */
  91
  92
  93 /* DRCR (debug run control register) bits */
  94 #define DRCR_HALT                               (1 << 0)
  95 #define DRCR_RESTART                    (1 << 1)
  96 #define DRCR_CLEAR_EXCEPTIONS   (1 << 2)
  97
  98 /* ECR (Execution Control Register) bits */
  99 #define ECR_RCE         BIT(1)
 100
 101 /* ESR (Event Status Register) bits */
 102 #define ESR_RC          BIT(1)
 103
 104 /* PRSR (processor debug status register) bits */
 105 #define PRSR_PU                                 (1 << 0)
 106 #define PRSR_SPD                                (1 << 1)
 107 #define PRSR_RESET                              (1 << 2)
 108 #define PRSR_SR                                 (1 << 3)
 109 #define PRSR_HALT                               (1 << 4)
 110 #define PRSR_OSLK                               (1 << 5)
 111 #define PRSR_DLK                                (1 << 6)
 112 #define PRSR_EDAD                               (1 << 7)
 113 #define PRSR_SDAD                               (1 << 8)
 114 #define PRSR_EPMAD                              (1 << 9)
 115 #define PRSR_SPMAD                              (1 << 10)
 116 #define PRSR_SDR                                (1 << 11)
 117
 118 /* PRCR (processor debug control register) bits */
 119 #define PRCR_CORENPDRQ                  (1 << 0)
 120 #define PRCR_CWRR                               (1 << 2)
 121 #define PRCR_COREPURQ                   (1 << 3)
 122
 123 void armv8_dpm_report_dscr(struct arm_dpm *dpm, uint32_t dcsr);
 124 void armv8_dpm_handle_exception(struct arm_dpm *dpm, bool do_restore);
 125 enum arm_state armv8_dpm_get_core_state(struct arm_dpm *dpm);
 126
 127 #endif /* OPENOCD_TARGET_ARM_DPM_H */