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comparison m68k_core.h @ 2350:f8b5142c06aa

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Allow 68K to return mid-instruction. Adjust how 68K interrupt ack works so int2 busy flag timing is more correct. Fix some other SCD timing issues
author Michael Pavone <pavone@retrodev.com>
date Mon, 16 Oct 2023 23:30:04 -0700
parents 0111c8344477
children 8f3cfb77f1e3
comparison
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2349:f0fc6c09517d 2350:f8b5142c06aa
25 #define M68K_STATUS_TRACE 0x80 25 #define M68K_STATUS_TRACE 0x80
26 26
27 typedef void (*start_fun)(uint8_t * addr, void * context); 27 typedef void (*start_fun)(uint8_t * addr, void * context);
28 typedef struct m68k_context m68k_context; 28 typedef struct m68k_context m68k_context;
29 typedef m68k_context *(*sync_fun)(m68k_context * context, uint32_t address); 29 typedef m68k_context *(*sync_fun)(m68k_context * context, uint32_t address);
30 typedef m68k_context *(*int_ack_fun)(m68k_context * context);
30 31
31 typedef struct { 32 typedef struct {
32 code_ptr impl; 33 code_ptr impl;
33 uint16_t reglist; 34 uint16_t reglist;
34 uint8_t reg_to_mem; 35 uint8_t reg_to_mem;
59 code_ptr native_addr_and_sync; 60 code_ptr native_addr_and_sync;
60 code_ptr get_sr; 61 code_ptr get_sr;
61 code_ptr set_sr; 62 code_ptr set_sr;
62 code_ptr set_ccr; 63 code_ptr set_ccr;
63 code_ptr bp_stub; 64 code_ptr bp_stub;
65 code_ptr save_context_scratch;
66 code_ptr load_context_scratch;
64 sync_fun sync_components; 67 sync_fun sync_components;
68 int_ack_fun int_ack;
65 code_info extra_code; 69 code_info extra_code;
66 movem_fun *big_movem; 70 movem_fun *big_movem;
67 uint32_t num_movem; 71 uint32_t num_movem;
68 uint32_t movem_storage; 72 uint32_t movem_storage;
69 code_word prologue_start; 73 code_word prologue_start;
77 } m68k_breakpoint; 81 } m68k_breakpoint;
78 82
79 struct m68k_context { 83 struct m68k_context {
80 uint8_t flags[5]; 84 uint8_t flags[5];
81 uint8_t status; 85 uint8_t status;
82 uint16_t int_ack;
83 uint32_t dregs[8]; 86 uint32_t dregs[8];
84 uint32_t aregs[9]; 87 uint32_t aregs[9];
85 uint32_t target_cycle; //cycle at which the next synchronization or interrupt occurs 88 uint32_t target_cycle; //cycle at which the next synchronization or interrupt occurs
86 uint32_t current_cycle; 89 uint32_t current_cycle;
87 uint32_t sync_cycle; 90 uint32_t sync_cycle;
88 uint32_t int_cycle; 91 uint32_t int_cycle;
89 uint32_t int_num; 92 uint32_t int_num;
90 uint32_t last_prefetch_address; 93 uint32_t last_prefetch_address;
94 uint32_t scratch1;
95 uint32_t scratch2;
91 uint16_t *mem_pointers[NUM_MEM_AREAS]; 96 uint16_t *mem_pointers[NUM_MEM_AREAS];
92 code_ptr resume_pc; 97 code_ptr resume_pc;
93 code_ptr reset_handler; 98 code_ptr reset_handler;
94 m68k_options *options; 99 m68k_options *options;
95 void *system; 100 void *system;
101 void *host_sp_entry;
102 void *stack_storage[10];
96 m68k_breakpoint *breakpoints; 103 m68k_breakpoint *breakpoints;
97 uint32_t num_breakpoints; 104 uint32_t num_breakpoints;
98 uint32_t bp_storage; 105 uint32_t bp_storage;
99 uint8_t int_pending; 106 uint8_t int_pending;
100 uint8_t trace_pending; 107 uint8_t trace_pending;
101 uint8_t should_return; 108 uint8_t should_return;
109 uint8_t stack_storage_count;
102 uint8_t ram_code_flags[]; 110 uint8_t ram_code_flags[];
103 }; 111 };
104 112
105 typedef m68k_context *(*m68k_reset_handler)(m68k_context *context); 113 typedef m68k_context *(*m68k_reset_handler)(m68k_context *context);
106 114
107 115
108 void translate_m68k_stream(uint32_t address, m68k_context * context); 116 void translate_m68k_stream(uint32_t address, m68k_context * context);
109 void start_68k_context(m68k_context * context, uint32_t address); 117 void start_68k_context(m68k_context * context, uint32_t address);
110 void resume_68k(m68k_context *context); 118 void resume_68k(m68k_context *context);
111 void init_m68k_opts(m68k_options * opts, memmap_chunk * memmap, uint32_t num_chunks, uint32_t clock_divider, sync_fun sync_components); 119 void init_m68k_opts(m68k_options * opts, memmap_chunk * memmap, uint32_t num_chunks, uint32_t clock_divider, sync_fun sync_components, int_ack_fun int_ack);
112 m68k_context * init_68k_context(m68k_options * opts, m68k_reset_handler reset_handler); 120 m68k_context * init_68k_context(m68k_options * opts, m68k_reset_handler reset_handler);
113 void m68k_reset(m68k_context * context); 121 void m68k_reset(m68k_context * context);
114 void m68k_options_free(m68k_options *opts); 122 void m68k_options_free(m68k_options *opts);
115 void insert_breakpoint(m68k_context * context, uint32_t address, m68k_debug_handler bp_handler); 123 void insert_breakpoint(m68k_context * context, uint32_t address, m68k_debug_handler bp_handler);
116 void remove_breakpoint(m68k_context * context, uint32_t address); 124 void remove_breakpoint(m68k_context * context, uint32_t address);