svp compiler: hle done?
[picodrive.git] / Pico / carthw / svp / svp.c
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CommitLineData
1// The SVP chip emulator
2
3// (c) Copyright 2008, Grazvydas "notaz" Ignotas
4// Free for non-commercial use.
5
6// For commercial use, separate licencing terms must be obtained.
7
8
9#include "../../PicoInt.h"
10#include "compiler.h"
11#ifdef __GP2X__
12#include <sys/mman.h>
13#endif
14
15svp_t *svp = NULL;
16int PicoSVPCycles = 1000; // cycles/line
17
18/* save state stuff */
19typedef enum {
20 CHUNK_IRAM = CHUNK_CARTHW,
21 CHUNK_DRAM,
22 CHUNK_SSP
23} chunk_name_e;
24
25static carthw_state_chunk svp_states[] =
26{
27 { CHUNK_IRAM, 0x800, NULL },
28 { CHUNK_DRAM, sizeof(svp->dram), NULL },
29 { CHUNK_SSP, sizeof(svp->ssp1601) - sizeof(svp->ssp1601.drc), NULL },
30 { 0, 0, NULL }
31};
32
33
34static void PicoSVPReset(void)
35{
36 elprintf(EL_SVP, "SVP reset");
37
38 memcpy(svp->iram_rom + 0x800, Pico.rom + 0x800, 0x20000 - 0x800);
39 ssp1601_reset(&svp->ssp1601);
40 if (!(PicoOpt&0x20000))
41 ssp1601_dyn_reset(&svp->ssp1601);
42}
43
44
45static void PicoSVPLine(int count)
46{
47 if (PicoOpt&0x20000)
48 ssp1601_run(PicoSVPCycles * count);
49 else
50 ssp1601_dyn_run(PicoSVPCycles * count);
51
52 // test mode
53 //if (Pico.m.frame_count == 13) PicoPad[0] |= 0xff;
54}
55
56
57static int PicoSVPDma(unsigned int source, int len, unsigned short **srcp, unsigned short **limitp)
58{
59 if (source < Pico.romsize) // Rom
60 {
61 source -= 2;
62 *srcp = (unsigned short *)(Pico.rom + (source&~1));
63 *limitp = (unsigned short *)(Pico.rom + Pico.romsize);
64 return 1;
65 }
66 else if ((source & 0xfe0000) == 0x300000)
67 {
68 elprintf(EL_VDPDMA|EL_SVP, "SVP DmaSlow from %06x, len=%i", source, len);
69 source &= 0x1fffe;
70 source -= 2;
71 *srcp = (unsigned short *)(svp->dram + source);
72 *limitp = (unsigned short *)(svp->dram + sizeof(svp->dram));
73 return 1;
74 }
75 else
76 elprintf(EL_VDPDMA|EL_SVP|EL_ANOMALY, "SVP FIXME unhandled DmaSlow from %06x, len=%i", source, len);
77
78 return 0;
79}
80
81
82void PicoSVPInit(void)
83{
84#ifdef __GP2X__
85 int ret;
86 ret = munmap(tcache, TCACHE_SIZE);
87 printf("munmap tcache: %i\n", ret);
88#endif
89}
90
91
92static void PicoSVPShutdown(void)
93{
94#ifdef __GP2X__
95 // also unmap tcache
96 PicoSVPInit();
97#endif
98}
99
100
101void PicoSVPStartup(void)
102{
103 void *tmp;
104
105 elprintf(EL_SVP, "SVP init");
106
107 tmp = realloc(Pico.rom, 0x200000 + sizeof(*svp));
108 if (tmp == NULL)
109 {
110 elprintf(EL_STATUS|EL_SVP, "OOM for SVP data");
111 return;
112 }
113
114 //PicoOpt |= 0x20000;
115 Pico.rom = tmp;
116 svp = (void *) ((char *)tmp + 0x200000);
117 memset(svp, 0, sizeof(*svp));
118
119#ifdef __GP2X__
120 tmp = mmap(tcache, TCACHE_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
121 printf("mmap tcache: %p, asked %p\n", tmp, tcache);
122#endif
123
124 // init SVP compiler
125 if (!(PicoOpt&0x20000)) {
126 if (ssp1601_dyn_startup()) return;
127 }
128
129 // init ok, setup hooks..
130 PicoRead16Hook = PicoSVPRead16;
131 PicoWrite8Hook = PicoSVPWrite8;
132 PicoWrite16Hook = PicoSVPWrite16;
133 PicoDmaHook = PicoSVPDma;
134 PicoResetHook = PicoSVPReset;
135 PicoLineHook = PicoSVPLine;
136 PicoCartUnloadHook = PicoSVPShutdown;
137
138 // save state stuff
139 svp_states[0].ptr = svp->iram_rom;
140 svp_states[1].ptr = svp->dram;
141 svp_states[2].ptr = &svp->ssp1601;
142 carthw_chunks = svp_states;
143}
144
145