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1 /* mips-stub.h - MIPS-specific definitions for generic stub |
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2 * |
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3 * Copyright (c) 1998 Cygnus Support |
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4 * |
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5 * The authors hereby grant permission to use, copy, modify, distribute, |
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6 * and license this software and its documentation for any purpose, provided |
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7 * that existing copyright notices are retained in all copies and that this |
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8 * notice is included verbatim in any distributions. No written agreement, |
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9 * license, or royalty fee is required for any of the authorized uses. |
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10 * Modifications to this software may be copyrighted by their authors |
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11 * and need not follow the licensing terms described here, provided that |
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12 * the new terms are clearly indicated on the first page of each file where |
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13 * they apply. |
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14 */ |
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15 |
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16 #define NUMREGS 90 |
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17 |
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18 #ifdef __mips64 |
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19 #define REGSIZE(X) 8 |
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20 typedef unsigned long long target_register_t; |
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21 #else |
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22 #define REGSIZE(X) 4 |
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23 typedef unsigned long target_register_t; |
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24 #endif |
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25 |
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26 enum regnames { |
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27 ZERO, AT, V0, V1, A0, A1, A2, A3, |
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28 T0, T1, T2, T3, T4, T5, T6, T7, |
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29 S0, S1, S2, S3, S4, S5, S6, S7, |
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30 T8, T9, K0, K1, GP, SP, S8, RA, |
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31 SR, LO, HI, BAD, CAUSE, PC, |
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32 CONFIG = 84, CACHE, DEBUG, DEPC, EPC |
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33 }; |
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34 |
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35 typedef enum regnames regnames_t; |
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36 |
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37 #include <cyg/hal/generic-stub.h> |
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38 |
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39 /* If ENABLED is non-zero, supply a memory fault handler that traps |
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40 subsequent memory errors and sets _mem_err to 1. Otherwise, memory |
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41 faults are processed as exceptions. */ |
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42 extern void __set_mem_fault_trap (int enable); |
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43 |
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44 /* Write C to the current serial port. */ |
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45 extern void putDebugChar (int c); |
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46 |
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47 /* Read one character from the current serial port. */ |
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48 extern int getDebugChar (void); |
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49 |
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50 /* Given a trap value TRAP, return the corresponding signal. */ |
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51 extern int __computeSignal (unsigned int trap_number); |
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52 |
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53 /* Install the standard set of trap handlers for the stub. */ |
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54 extern void __install_traps (void); |
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55 |
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56 /* Return the SPARC trap number corresponding to the last-taken trap. */ |
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57 extern int __get_trap_number (void); |
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58 |
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59 /* Return the currently-saved value corresponding to register REG. */ |
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60 extern target_register_t get_register (regnames_t reg); |
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61 |
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62 /* Store VALUE in the register corresponding to WHICH. */ |
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63 extern void put_register (regnames_t which, target_register_t value); |
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64 |
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65 /* Set the currently-saved pc register value to PC. This also updates NPC |
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66 as needed. */ |
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67 extern void set_pc (target_register_t pc); |
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68 |
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69 /* Flush the instruction cache. */ |
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70 extern void flush_i_cache (void); |
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71 |
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72 /* Reset the board. */ |
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73 extern void __reset (void); |
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74 |
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75 /* Set the baud rate for the current serial port. */ |
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76 extern void __set_baud_rate (int baud); |
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77 |
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78 /* Initialize the hardware. */ |
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79 extern void initHardware (void); |
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80 |
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81 /* Set things up so that the next user resume will execute one instruction. |
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82 This may be done by setting breakpoints or setting a single step flag |
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83 in the saved user registers, for example. */ |
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84 void single_step (void); |
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85 |
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86 /* Clear the single-step state. */ |
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87 void clear_single_step (void); |
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88 |
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89 struct gdb_packet; |
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90 |
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91 /* Return 1 when a complete packet has been received, 0 if the packet |
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92 is not yet complete, or -1 if an erroneous packet was NAKed. */ |
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93 int __add_char_to_packet (int character, struct gdb_packet *packet); |
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94 |
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95 /* If the breakpoint we hit is in the breakpoint() instruction, return a |
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96 non-zero value. */ |
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97 extern int __is_breakpoint_function (void); |
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98 |
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99 /* Skip the current instruction. */ |
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100 extern void __skipinst (void); |
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101 |
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102 /* Write the 'T' packet in BUFFER. SIGVAL is the signal the program |
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103 received. */ |
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104 |
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105 extern void __build_t_packet (int sigval, char *buffer); |
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106 |
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107 extern void install_breakpoints (void); |
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108 |
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109 /* Address in text section of a breakpoint instruction. */ |
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110 |
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111 extern void _breakinst (void); |
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112 |
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113 /* The opcode for a breakpoint instruction. */ |
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114 |
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115 extern unsigned long __break_opcode (void); |
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116 |
