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   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2018 by Square, Inc.                                    *
   5  *   Steven Stallion <stallion@squareup.com>                               *
   6  *   James Zhao <hjz@squareup.com>                                         *
   7  ***************************************************************************/
   8
   9 #ifndef OPENOCD_TARGET_ESIRISC_H
  10 #define OPENOCD_TARGET_ESIRISC_H
  11
  12 #include <helper/types.h>
  13 #include <target/breakpoints.h>
  14 #include <target/register.h>
  15 #include <target/target.h>
  16
  17 #include "esirisc_jtag.h"
  18 #include "esirisc_regs.h"
  19 #include "esirisc_trace.h"
  20
  21 #define MAX_BREAKPOINTS                 8
  22 #define MAX_WATCHPOINTS                 8
  23
  24 /* Exception IDs */
  25 #define EID_RESET                               0x00
  26 #define EID_HARDWARE_FAILURE    0x01
  27 #define EID_NMI                                 0x02
  28 #define EID_INST_BREAKPOINT             0x03
  29 #define EID_DATA_BREAKPOINT             0x04
  30 #define EID_UNSUPPORTED                 0x05
  31 #define EID_PRIVILEGE_VIOLATION 0x06
  32 #define EID_INST_BUS_ERROR              0x07
  33 #define EID_DATA_BUS_ERROR              0x08
  34 #define EID_ALIGNMENT_ERROR             0x09
  35 #define EID_ARITHMETIC_ERROR    0x0a
  36 #define EID_SYSTEM_CALL                 0x0b
  37 #define EID_MEMORY_MANAGEMENT   0x0c
  38 #define EID_UNRECOVERABLE               0x0d
  39 #define EID_INTERRUPT_N                 0x20
  40
  41 /* Exception Entry Points */
  42 #define ENTRY_RESET                             0x00
  43 #define ENTRY_UNRECOVERABLE             0x01
  44 #define ENTRY_HARDWARE_FAILURE  0x02
  45 #define ENTRY_RUNTIME                   0x03
  46 #define ENTRY_MEMORY                    0x04
  47 #define ENTRY_SYSCALL                   0x05
  48 #define ENTRY_DEBUG                             0x06
  49 #define ENTRY_NMI                               0x07
  50 #define ENTRY_INTERRUPT_N               0x08
  51
  52 /* Hardware Debug Control */
  53 #define HWDC_R                                  (1<<4)  /* Reset & Hardware Failure */
  54 #define HWDC_I                                  (1<<3)  /* Interrupts */
  55 #define HWDC_S                                  (1<<2)  /* System Calls */
  56 #define HWDC_E                                  (1<<1)  /* Program Errors */
  57 #define HWDC_D                                  (1<<0)  /* Debug Exceptions */
  58
  59 enum esirisc_cache {
  60         ESIRISC_CACHE_VON_NEUMANN,
  61         ESIRISC_CACHE_HARVARD,
  62 };
  63
  64 struct esirisc_common {
  65         struct target *target;
  66         struct esirisc_jtag jtag_info;
  67         enum esirisc_cache cache_arch;
  68         char *gdb_arch;
  69
  70         struct reg_cache *reg_cache;
  71         struct reg *epc;
  72         struct reg *ecas;
  73         struct reg *eid;
  74         struct reg *ed;
  75         uint32_t etc_save;
  76         uint32_t hwdc_save;
  77
  78         int num_bits;
  79         int num_regs;
  80         bool has_icache;
  81         bool has_dcache;
  82         bool has_trace;
  83
  84         int num_breakpoints;
  85         struct breakpoint *breakpoints_p[MAX_BREAKPOINTS];
  86
  87         int num_watchpoints;
  88         struct watchpoint *watchpoints_p[MAX_WATCHPOINTS];
  89
  90         struct esirisc_trace trace_info;
  91 };
  92
  93 union esirisc_memory {
  94         uint32_t word;
  95         uint16_t hword;
  96         uint8_t byte;
  97 };
  98
  99 struct esirisc_reg {
 100         struct esirisc_common *esirisc;
 101
 102         uint8_t bank;
 103         uint8_t csr;
 104
 105         int (*read)(struct reg *reg);
 106         int (*write)(struct reg *reg);
 107 };
 108
 109 static inline struct esirisc_common *target_to_esirisc(struct target *target)
 110 {
 111         return (struct esirisc_common *)target->arch_info;
 112 }
 113
 114 static inline char *esirisc_cache_arch_name(struct esirisc_common *esirisc)
 115 {
 116         return esirisc->cache_arch == ESIRISC_CACHE_HARVARD ? "harvard" : "von_neumann";
 117 }
 118
 119 static inline bool esirisc_has_cache(struct esirisc_common *esirisc)
 120 {
 121         return esirisc->has_icache || esirisc->has_dcache;
 122 }
 123
 124 #endif /* OPENOCD_TARGET_ESIRISC_H */