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comparison src/cpu.h @ 46:51672bd41cdd

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Rework data segment setup to allow a stack segment and to add space for push and pop instructions
author Michael Pavone <pavone@retrodev.com>
date Tue, 30 Aug 2016 20:50:54 -0700
parents 6e7bfe83d2b0
children
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45:5338b9affd09 46:51672bd41cdd
32 uint32_t current_target; 32 uint32_t current_target;
33 uint32_t num_mem_regions; 33 uint32_t num_mem_regions;
34 uint16_t regs[16]; 34 uint16_t regs[16];
35 uint16_t exception; 35 uint16_t exception;
36 uint16_t exception_pc; 36 uint16_t exception_pc;
37 uint16_t exception_pch;
38 uint16_t exception_sr; 37 uint16_t exception_sr;
39 uint16_t exception_ur; 38 uint16_t exception_ur;
40 uint16_t vector_base; 39 uint16_t vector_base;
41 uint32_t pc_msb; 40 uint32_t pc_msb;
42 uint32_t data_low_msb; 41 uint32_t exception_pc_msb;
43 uint32_t data_high_msb;
44 42
45 uint16_t prefetch; 43 uint16_t prefetch;
46 44
47 uint8_t state; 45 uint8_t state;
48 uint8_t pending_interrupts; 46 uint8_t pending_interrupts;
101 }; 99 };
102 100
103 enum { 101 enum {
104 RETI, 102 RETI,
105 TRAPI, 103 TRAPI,
104 PUSH,
105 POP,
106 GETPCH,
107 SETPCH,
106 GETEPC, 108 GETEPC,
107 SETEPC, 109 SETEPC,
108 GETEPCH,
109 SETEPCH,
110 GETESR, 110 GETESR,
111 SETESR, 111 SETESR,
112 GETEUR, 112 GETEUR,
113 SETEUR, 113 SETEUR,
114 GETENUM, 114 GETENUM,
115 SETENUM, 115 SETENUM,
116 GETVBR, 116 GETVBR,
117 SETVBR, 117 SETVBR,
118 GETDATABANKS,
119 SETDATABANKS,
120 }; 118 };
121 119
122 enum { 120 enum {
123 COND_ALWAYS, 121 COND_ALWAYS,
124 COND_NEVER, 122 COND_NEVER,
130 COND_NCARRY, 128 COND_NCARRY,
131 COND_GREATER, 129 COND_GREATER,
132 COND_LEQ 130 COND_LEQ
133 }; 131 };
134 132
133 #define REG_DB 12
134 #define REG_SP 13
135 #define REG_PC 14 135 #define REG_PC 14
136 #define REG_SR 15 136 #define REG_SR 15
137 137
138 #endif //CPU_H_ 138 #endif //CPU_H_