gp2x+wiz binary support, wiz code wip
[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 "../../pico_int.h"
10#include "compiler.h"
11#ifdef __GP2X__
12#include <sys/mman.h>
13#endif
14
15svp_t *svp = NULL;
16int PicoSVPCycles = 850; // cycles/line, just a guess
17static int svp_dyn_ready = 0;
18
19/* save state stuff */
20typedef enum {
21 CHUNK_IRAM = CHUNK_CARTHW,
22 CHUNK_DRAM,
23 CHUNK_SSP
24} chunk_name_e;
25
26static carthw_state_chunk svp_states[] =
27{
28 { CHUNK_IRAM, 0x800, NULL },
29 { CHUNK_DRAM, sizeof(svp->dram), NULL },
30 { CHUNK_SSP, sizeof(svp->ssp1601) - sizeof(svp->ssp1601.drc), NULL },
31 { 0, 0, NULL }
32};
33
34
35static void PicoSVPReset(void)
36{
37 elprintf(EL_SVP, "SVP reset");
38
39 memcpy(svp->iram_rom + 0x800, Pico.rom + 0x800, 0x20000 - 0x800);
40 ssp1601_reset(&svp->ssp1601);
41#ifndef PSP
42 if ((PicoOpt&POPT_EN_SVP_DRC) && svp_dyn_ready)
43 ssp1601_dyn_reset(&svp->ssp1601);
44#endif
45}
46
47
48static void PicoSVPLine(void)
49{
50 int count = 1;
51#if defined(ARM) || defined(PSP)
52 // performance hack
53 static int delay_lines = 0;
54 delay_lines++;
55 if ((Pico.m.scanline&0xf) != 0xf && Pico.m.scanline != 261 && Pico.m.scanline != 311)
56 return;
57 count = delay_lines;
58 delay_lines = 0;
59#endif
60
61#ifndef PSP
62 if ((PicoOpt&POPT_EN_SVP_DRC) && svp_dyn_ready)
63 ssp1601_dyn_run(PicoSVPCycles * count);
64 else
65#endif
66 {
67 ssp1601_run(PicoSVPCycles * count);
68 svp_dyn_ready = 0; // just in case
69 }
70
71 // test mode
72 //if (Pico.m.frame_count == 13) PicoPad[0] |= 0xff;
73}
74
75
76static int PicoSVPDma(unsigned int source, int len, unsigned short **srcp, unsigned short **limitp)
77{
78 if (source < Pico.romsize) // Rom
79 {
80 source -= 2;
81 *srcp = (unsigned short *)(Pico.rom + (source&~1));
82 *limitp = (unsigned short *)(Pico.rom + Pico.romsize);
83 return 1;
84 }
85 else if ((source & 0xfe0000) == 0x300000)
86 {
87 elprintf(EL_VDPDMA|EL_SVP, "SVP DmaSlow from %06x, len=%i", source, len);
88 source &= 0x1fffe;
89 source -= 2;
90 *srcp = (unsigned short *)(svp->dram + source);
91 *limitp = (unsigned short *)(svp->dram + sizeof(svp->dram));
92 return 1;
93 }
94 else
95 elprintf(EL_VDPDMA|EL_SVP|EL_ANOMALY, "SVP FIXME unhandled DmaSlow from %06x, len=%i", source, len);
96
97 return 0;
98}
99
100
101void PicoSVPInit(void)
102{
103#ifdef __GP2X__
104 int ret;
105 ret = munmap(tcache, SSP_DRC_SIZE);
106 printf("munmap tcache: %i\n", ret);
107#endif
108}
109
110
111static void PicoSVPShutdown(void)
112{
113#ifdef __GP2X__
114 // also unmap tcache
115 PicoSVPInit();
116#endif
117}
118
119
120void PicoSVPStartup(void)
121{
122 void *tmp;
123
124 elprintf(EL_SVP, "SVP init");
125
126 tmp = realloc(Pico.rom, 0x200000 + sizeof(*svp));
127 if (tmp == NULL)
128 {
129 elprintf(EL_STATUS|EL_SVP, "OOM for SVP data");
130 return;
131 }
132
133 //PicoOpt &= ~0x20000;
134 Pico.rom = tmp;
135 svp = (void *) ((char *)tmp + 0x200000);
136 memset(svp, 0, sizeof(*svp));
137
138#ifdef __GP2X__
139 tmp = mmap(tcache, SSP_DRC_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
140 printf("mmap tcache: %p, asked %p\n", tmp, tcache);
141#endif
142
143 // init SVP compiler
144 svp_dyn_ready = 0;
145#ifndef PSP
146 if (PicoOpt&POPT_EN_SVP_DRC) {
147 if (ssp1601_dyn_startup()) return;
148 svp_dyn_ready = 1;
149 }
150#endif
151
152 // init ok, setup hooks..
153 PicoRead16Hook = PicoSVPRead16;
154 PicoWrite8Hook = PicoSVPWrite8;
155 PicoWrite16Hook = PicoSVPWrite16;
156 PicoDmaHook = PicoSVPDma;
157 PicoResetHook = PicoSVPReset;
158 PicoLineHook = PicoSVPLine;
159 PicoCartUnloadHook = PicoSVPShutdown;
160
161 // save state stuff
162 svp_states[0].ptr = svp->iram_rom;
163 svp_states[1].ptr = svp->dram;
164 svp_states[2].ptr = &svp->ssp1601;
165 carthw_chunks = svp_states;
166 PicoAHW |= PAHW_SVP;
167}
168
169