mirror of
https://github.com/RaySollium99/picodrive.git
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1f1ff763e6
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@866 be3aeb3a-fb24-0410-a615-afba39da0efa
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
#ifndef __SH2_H__
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#define __SH2_H__
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#if !defined(REGPARM) && defined(__i386__)
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#define REGPARM(x) __attribute__((regparm(x)))
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#else
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#define REGPARM(x)
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#endif
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// registers - matches structure order
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typedef enum {
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SHR_R0 = 0, SHR_SP = 15,
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SHR_PC, SHR_PPC, SHR_PR, SHR_SR,
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SHR_GBR, SHR_VBR, SHR_MACH, SHR_MACL,
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} sh2_reg_e;
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typedef struct SH2_
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{
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unsigned int r[16]; // 00
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unsigned int pc; // 40
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unsigned int ppc;
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unsigned int pr;
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unsigned int sr;
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unsigned int gbr, vbr; // 50
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unsigned int mach, macl; // 58
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// common
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const void *read8_map; // 60
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const void *read16_map;
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const void **write8_tab;
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const void **write16_tab;
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// drc stuff
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int drc_tmp; // 70
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int irq_cycles;
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void *p_bios; // convenience pointers
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void *p_da;
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void *p_sdram; // 80
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void *p_rom;
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unsigned int pdb_io_csum[2];
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// interpreter stuff
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int icount; // cycles left in current timeslice
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unsigned int ea;
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unsigned int delay;
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unsigned int test_irq;
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int pending_level; // MAX(pending_irl, pending_int_irq)
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int pending_irl;
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int pending_int_irq; // internal irq
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int pending_int_vector;
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int REGPARM(2) (*irq_callback)(struct SH2_ *sh2, int level);
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int is_slave;
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unsigned int cycles_aim; // subtract sh2_icount to get global counter
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unsigned int cycles_done;
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} SH2;
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extern SH2 *sh2; // active sh2. XXX: consider removing
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int sh2_init(SH2 *sh2, int is_slave);
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void sh2_finish(SH2 *sh2);
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void sh2_reset(SH2 *sh2);
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void sh2_irl_irq(SH2 *sh2, int level, int nested_call);
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void sh2_internal_irq(SH2 *sh2, int level, int vector);
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void sh2_do_irq(SH2 *sh2, int level, int vector);
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void sh2_execute(SH2 *sh2, int cycles);
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// pico memhandlers
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// XXX: move somewhere else
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unsigned int REGPARM(2) p32x_sh2_read8(unsigned int a, SH2 *sh2);
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unsigned int REGPARM(2) p32x_sh2_read16(unsigned int a, SH2 *sh2);
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unsigned int REGPARM(2) p32x_sh2_read32(unsigned int a, SH2 *sh2);
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int REGPARM(3) p32x_sh2_write8 (unsigned int a, unsigned int d, SH2 *sh2);
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int REGPARM(3) p32x_sh2_write16(unsigned int a, unsigned int d, SH2 *sh2);
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int REGPARM(3) p32x_sh2_write32(unsigned int a, unsigned int d, SH2 *sh2);
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#endif /* __SH2_H__ */
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