4 #if !defined(REGPARM) && defined(__i386__)
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5 #define REGPARM(x) __attribute__((regparm(x)))
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10 // registers - matches structure order
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12 SHR_R0 = 0, SHR_SP = 15,
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13 SHR_PC, SHR_PPC, SHR_PR, SHR_SR,
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14 SHR_GBR, SHR_VBR, SHR_MACH, SHR_MACL,
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19 unsigned int r[16]; // 00
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20 unsigned int pc; // 40
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24 unsigned int gbr, vbr; // 50
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25 unsigned int mach, macl; // 58
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28 const void *read8_map; // 60
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29 const void *read16_map;
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30 const void **write8_tab;
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31 const void **write16_tab;
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36 void *p_bios; // convenience pointers
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38 void *p_sdram; // 80
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40 unsigned int pdb_io_csum[2];
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42 #define SH2_STATE_RUN (1 << 0) // to prevent recursion
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43 #define SH2_STATE_SLEEP (1 << 1)
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44 #define SH2_STATE_CPOLL (1 << 2) // polling comm regs
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45 #define SH2_STATE_VPOLL (1 << 3) // polling VDP
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47 unsigned int poll_addr;
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51 // interpreter stuff
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52 int icount; // cycles left in current timeslice
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55 unsigned int test_irq;
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57 int pending_level; // MAX(pending_irl, pending_int_irq)
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59 int pending_int_irq; // internal irq
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60 int pending_int_vector;
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61 int REGPARM(2) (*irq_callback)(struct SH2_ *sh2, int level);
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64 unsigned int cycles_timeslice;
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66 struct SH2_ *other_sh2;
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68 // we use 68k reference cycles for easier sync
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69 unsigned int m68krcycles_done;
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70 unsigned int mult_m68k_to_sh2;
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71 unsigned int mult_sh2_to_m68k;
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73 unsigned char data_array[0x1000]; // cache (can be used as RAM)
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74 unsigned int peri_regs[0x200/4]; // periphereal regs
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77 #define CYCLE_MULT_SHIFT 10
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78 #define C_M68K_TO_SH2(xsh2, c) \
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79 ((int)((c) * (xsh2).mult_m68k_to_sh2) >> CYCLE_MULT_SHIFT)
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80 #define C_SH2_TO_M68K(xsh2, c) \
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81 ((int)((c + 3) * (xsh2).mult_sh2_to_m68k) >> CYCLE_MULT_SHIFT)
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83 int sh2_init(SH2 *sh2, int is_slave, SH2 *other_sh2);
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84 void sh2_finish(SH2 *sh2);
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85 void sh2_reset(SH2 *sh2);
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86 int sh2_irl_irq(SH2 *sh2, int level, int nested_call);
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87 void sh2_internal_irq(SH2 *sh2, int level, int vector);
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88 void sh2_do_irq(SH2 *sh2, int level, int vector);
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89 void sh2_pack(const SH2 *sh2, unsigned char *buff);
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90 void sh2_unpack(SH2 *sh2, const unsigned char *buff);
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92 int sh2_execute_drc(SH2 *sh2c, int cycles);
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93 int sh2_execute_interpreter(SH2 *sh2c, int cycles);
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95 static inline int sh2_execute(SH2 *sh2, int cycles, int use_drc)
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99 sh2->cycles_timeslice = cycles;
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102 ret = sh2_execute_drc(sh2, cycles);
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105 ret = sh2_execute_interpreter(sh2, cycles);
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107 return sh2->cycles_timeslice - ret;
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110 // regs, pending_int*, cycles, reserved
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111 #define SH2_STATE_SIZE ((24 + 2 + 2 + 12) * 4)
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113 // pico memhandlers
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114 // XXX: move somewhere else
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115 unsigned int REGPARM(2) p32x_sh2_read8(unsigned int a, SH2 *sh2);
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116 unsigned int REGPARM(2) p32x_sh2_read16(unsigned int a, SH2 *sh2);
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117 unsigned int REGPARM(2) p32x_sh2_read32(unsigned int a, SH2 *sh2);
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118 void REGPARM(3) p32x_sh2_write8 (unsigned int a, unsigned int d, SH2 *sh2);
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119 void REGPARM(3) p32x_sh2_write16(unsigned int a, unsigned int d, SH2 *sh2);
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120 void REGPARM(3) p32x_sh2_write32(unsigned int a, unsigned int d, SH2 *sh2);
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124 void do_sh2_trace(SH2 *current, int cycles);
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125 void do_sh2_cmp(SH2 *current);
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128 #endif /* __SH2_H__ */
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