180 lines
6.2 KiB
C
180 lines
6.2 KiB
C
#ifndef VB_H_
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#define VB_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef VBAPI
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#define VBAPI extern
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#endif
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/* Header includes */
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#include <stddef.h>
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#include <stdint.h>
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/**************************** Compilation Control ****************************/
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/*
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VB_DIRECT_EXCEPTION
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VB_DIRECT_EXECUTE
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VB_DIRECT_FETCH
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VB_DIRECT_FRAME
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VB_DIRECT_LINK
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VB_DIRECT_READ
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VB_DIRECT_SAMPLES
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VB_DIRECT_WRITE
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Implements callbacks as direct function calls with names given by the above
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symbols in their respective situations. If left undefined, the function
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pointer in the simulation state is used. Whether or not to call the callback
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is still determined by whether the function pointer is NULL.
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*/
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/*
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VB_DIV_GENERIC
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Provides a generic implementation for the DIV instruction that guarantees the
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correct results for quotient and remainder. If left undefined, an accelerated
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implementation is used that depends on the compiler's behavior.
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*/
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/*
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VB_LITTLE_ENDIAN
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Accelerates simulated memory reads and writes on hosts with little-endian
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byte ordering. If left undefined, a generic implementation is used instead.
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*/
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/*
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VB_SIGNED_PROPAGATE
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Accelerates sign extension by assuming the >> operator propagates the sign
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bit for signed types and does not for unsigned types. If left undefined, a
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generic implementation is used instead.
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*/
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/********************************* Constants *********************************/
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/* System registers */
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#define VB_ADTRE 25
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#define VB_CHCW 24
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#define VB_ECR 4
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#define VB_EIPC 0
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#define VB_EIPSW 1
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#define VB_FEPC 2
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#define VB_FEPSW 3
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#define VB_PIR 6
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#define VB_PSW 5
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#define VB_TKCW 7
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/* Memory access data types */
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#define VB_S8 0
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#define VB_U8 1
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#define VB_S16 2
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#define VB_U16 3
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#define VB_S32 4
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#define VB_F32 5
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/* Option keys */
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#define VB_PSEUDO_HALT 0
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/* Controller buttons */
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#define VB_PWR 0x0001
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#define VB_SGN 0x0002
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#define VB_A 0x0004
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#define VB_B 0x0008
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#define VB_RT 0x0010
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#define VB_LT 0x0020
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#define VB_RU 0x0040
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#define VB_RR 0x0080
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#define VB_LR 0x0100
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#define VB_LL 0x0200
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#define VB_LD 0x0400
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#define VB_LU 0x0800
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#define VB_STA 0x1000
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#define VB_SEL 0x2000
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#define VB_RL 0x4000
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#define VB_RD 0x8000
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/*********************************** Types ***********************************/
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/* Simulation state */
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typedef struct VB VB;
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/* Callbacks */
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typedef int (*vbOnException)(VB *sim, uint16_t *cause);
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typedef int (*vbOnExecute )(VB *sim, uint32_t address, const uint16_t *code, int length);
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typedef int (*vbOnFetch )(VB *sim, int fetch, uint32_t address, int32_t *value, uint32_t *cycles);
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typedef int (*vbOnFrame )(VB *sim);
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typedef int (*vbOnLink )(VB *sim1, VB *sim2, uint8_t *value1, uint8_t *value2);
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typedef int (*vbOnRead )(VB *sim, uint32_t address, int type, int32_t *value, uint32_t *cycles);
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typedef void (*vbOnSamples )(VB *sim, int16_t *buffer, uint32_t capacity);
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typedef int (*vbOnWrite )(VB *sim, uint32_t address, int type, int32_t *value, uint32_t *cycles, int *cancel);
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/******************************* API Commands ********************************/
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VBAPI int vbEmulate (VB *sim, uint32_t *clocks);
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VBAPI int vbEmulateEx (VB **sims, unsigned count, uint32_t *clocks);
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VBAPI void* vbGetCallback (VB *sim, int id);
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VBAPI void* vbGetCartRAM (VB *sim, uint32_t *size);
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VBAPI void* vbGetCartROM (VB *sim, uint32_t *size);
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VBAPI vbOnException vbGetExceptionCallback(VB *sim);
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VBAPI vbOnExecute vbGetExecuteCallback (VB *sim);
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VBAPI vbOnFetch vbGetFetchCallback (VB *sim);
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VBAPI vbOnFrame vbGetFrameCallback (VB *sim);
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VBAPI uint16_t vbGetKeys (VB *sim);
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VBAPI vbOnLink vbGetLinkCallback (VB *sim);
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VBAPI int vbGetOption (VB *sim, int key);
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VBAPI VB* vbGetPeer (VB *sim);
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VBAPI void vbGetPixels (VB *sim, void *left, int leftStrideX, int leftStrideY, void *right, int rightStrideX, int rightStrideY);
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VBAPI uint32_t vbGetProgramCounter (VB *sim);
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VBAPI int32_t vbGetProgramRegister (VB *sim, unsigned index);
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VBAPI vbOnRead vbGetReadCallback (VB *sim);
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VBAPI void* vbGetSamples (VB *sim, int *type, unsigned *capacity, unsigned *position);
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VBAPI vbOnSamples vbGetSamplesCallback (VB *sim);
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VBAPI uint32_t vbGetSystemRegister (VB *sim, unsigned index);
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VBAPI void* vbGetUserData (VB *sim);
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VBAPI vbOnWrite vbGetWriteCallback (VB *sim);
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VBAPI VB* vbInit (VB *sim);
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VBAPI int32_t vbRead (VB *sim, uint32_t address, int type);
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VBAPI VB* vbReset (VB *sim);
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VBAPI int vbSetCartRAM (VB *sim, void *sram, uint32_t size);
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VBAPI int vbSetCartROM (VB *sim, void *rom, uint32_t size);
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VBAPI vbOnException vbSetExceptionCallback(VB *sim, vbOnException callback);
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VBAPI vbOnExecute vbSetExecuteCallback (VB *sim, vbOnExecute callback);
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VBAPI vbOnFetch vbSetFetchCallback (VB *sim, vbOnFetch callback);
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VBAPI vbOnFrame vbSetFrameCallback (VB *sim, vbOnFrame callback);
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VBAPI vbOnLink vbSetLinkCallback (VB *sim, vbOnLink callback);
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VBAPI uint16_t vbSetKeys (VB *sim, uint16_t keys);
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VBAPI int vbSetOption (VB *sim, int key, int value);
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VBAPI void vbSetPeer (VB *sim, VB *peer);
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VBAPI uint32_t vbSetProgramCounter (VB *sim, uint32_t value);
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VBAPI int32_t vbSetProgramRegister (VB *sim, unsigned index, int32_t value);
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VBAPI vbOnRead vbSetReadCallback (VB *sim, vbOnRead callback);
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VBAPI int vbSetSamples (VB *sim, void *samples, int type, unsigned capacity);
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VBAPI vbOnSamples vbSetSamplesCallback (VB *sim, vbOnSamples callback);
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VBAPI uint32_t vbSetSystemRegister (VB *sim, unsigned index, uint32_t value);
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VBAPI void* vbSetUserData (VB *sim, void *tag);
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VBAPI vbOnWrite vbSetWriteCallback (VB *sim, vbOnWrite callback);
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VBAPI size_t vbSizeOf ();
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VBAPI int32_t vbWrite (VB *sim, uint32_t address, int type, int32_t value);
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#ifdef __cplusplus
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}
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#endif
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#endif /* VB_H_ */
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