lxdream 0.9.1| filename | src/pvr2/pvr2.c |
| changeset | 85:71e239d20c5d |
| prev | 65:9f124c245fc6 |
| next | 94:8d80d9c7cc7d |
| author | nkeynes |
| date | Sun Jan 22 22:38:51 2006 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Fix colour mode definitions Add PVR2 palette region Fix ta end-of-command when it's not in the same buffer |
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1 /**
2 * $Id: pvr2.c,v 1.13 2006-01-22 22:38:51 nkeynes Exp $
3 *
4 * PVR2 (Video) MMIO and supporting functions.
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18 #define MODULE pvr2_module
20 #include "dream.h"
21 #include "video.h"
22 #include "mem.h"
23 #include "asic.h"
24 #include "pvr2.h"
25 #include "sh4/sh4core.h"
26 #define MMIO_IMPL
27 #include "pvr2.h"
29 char *video_base;
31 void pvr2_init( void );
32 uint32_t pvr2_run_slice( uint32_t );
33 void pvr2_next_frame( void );
35 struct dreamcast_module pvr2_module = { "PVR2", pvr2_init, NULL, NULL,
36 pvr2_run_slice, NULL,
37 NULL, NULL };
39 void pvr2_init( void )
40 {
41 register_io_region( &mmio_region_PVR2 );
42 register_io_region( &mmio_region_PVR2PAL );
43 register_io_region( &mmio_region_PVR2TA );
44 video_base = mem_get_region_by_name( MEM_REGION_VIDEO );
45 }
47 uint32_t pvr2_time_counter = 0;
48 uint32_t pvr2_time_per_frame = 20000000;
50 uint32_t pvr2_run_slice( uint32_t nanosecs )
51 {
52 pvr2_time_counter += nanosecs;
53 while( pvr2_time_counter >= pvr2_time_per_frame ) {
54 pvr2_next_frame();
55 pvr2_time_counter -= pvr2_time_per_frame;
56 }
57 return nanosecs;
58 }
60 uint32_t vid_stride, vid_lpf, vid_ppl, vid_hres, vid_vres, vid_col;
61 int interlaced, bChanged = 1, bEnabled = 0, vid_size = 0;
62 char *frame_start; /* current video start address (in real memory) */
64 /*
65 * Display the next frame, copying the current contents of video ram to
66 * the window. If the video configuration has changed, first recompute the
67 * new frame size/depth.
68 */
69 void pvr2_next_frame( void )
70 {
71 if( bChanged ) {
72 int dispsize = MMIO_READ( PVR2, DISPSIZE );
73 int dispmode = MMIO_READ( PVR2, DISPMODE );
74 int vidcfg = MMIO_READ( PVR2, VIDCFG );
75 vid_stride = ((dispsize & DISPSIZE_MODULO) >> 20) - 1;
76 vid_lpf = ((dispsize & DISPSIZE_LPF) >> 10) + 1;
77 vid_ppl = ((dispsize & DISPSIZE_PPL)) + 1;
78 vid_col = (dispmode & DISPMODE_COL);
79 frame_start = video_base + MMIO_READ( PVR2, DISPADDR1 );
80 interlaced = (vidcfg & VIDCFG_I ? 1 : 0);
81 bEnabled = (dispmode & DISPMODE_DE) && (vidcfg & VIDCFG_VO ) ? 1 : 0;
82 vid_size = (vid_ppl * vid_lpf) << (interlaced ? 3 : 2);
83 vid_hres = vid_ppl;
84 vid_vres = vid_lpf;
85 if( interlaced ) vid_vres <<= 1;
86 switch( vid_col ) {
87 case MODE_RGB15:
88 case MODE_RGB16: vid_hres <<= 1; break;
89 case MODE_RGB24: vid_hres *= 3; break;
90 case MODE_RGB32: vid_hres <<= 2; break;
91 }
92 vid_hres >>= 2;
93 video_update_size( vid_hres, vid_vres, vid_col );
94 bChanged = 0;
95 }
96 if( bEnabled ) {
97 if( MMIO_READ( PVR2, VIDCFG2 ) & 0x08 ) {
98 /* Blanked */
99 uint32_t colour = MMIO_READ( PVR2, BORDERCOL );
100 video_fill( colour );
101 } else {
102 /* Assume bit depths match for now... */
103 memcpy( video_data, frame_start, vid_size );
104 }
105 } else {
106 memset( video_data, 0, vid_size );
107 }
108 video_update_frame();
109 asic_event( EVENT_SCANLINE1 );
110 asic_event( EVENT_SCANLINE2 );
111 asic_event( EVENT_RETRACE );
112 }
114 void mmio_region_PVR2_write( uint32_t reg, uint32_t val )
115 {
116 if( reg >= 0x200 && reg < 0x600 ) { /* Fog table */
117 MMIO_WRITE( PVR2, reg, val );
118 /* I don't want to hear about these */
119 return;
120 }
122 INFO( "PVR2 write to %08X <= %08X [%s: %s]", reg, val,
123 MMIO_REGID(PVR2,reg), MMIO_REGDESC(PVR2,reg) );
125 switch(reg) {
126 case DISPSIZE: bChanged = 1;
127 case DISPMODE: bChanged = 1;
128 case DISPADDR1: bChanged = 1;
129 case DISPADDR2: bChanged = 1;
130 case VIDCFG: bChanged = 1;
131 break;
132 case RENDSTART:
133 if( val == 0xFFFFFFFF )
134 pvr2_render_scene();
135 break;
136 }
137 MMIO_WRITE( PVR2, reg, val );
138 }
140 MMIO_REGION_READ_FN( PVR2, reg )
141 {
142 switch( reg ) {
143 case BEAMPOS:
144 return sh4r.icount&0x20 ? 0x2000 : 1;
145 default:
146 return MMIO_READ( PVR2, reg );
147 }
148 }
150 MMIO_REGION_DEFFNS( PVR2PAL )
152 void pvr2_set_base_address( uint32_t base )
153 {
154 mmio_region_PVR2_write( DISPADDR1, base );
155 }
158 void pvr2_render_scene( void )
159 {
160 /* Actual rendering goes here :) */
161 asic_event( EVENT_PVR_RENDER_DONE );
162 DEBUG( "Rendered frame %d", video_frame_count );
163 }
165 /** Tile Accelerator */
167 struct tacmd {
168 uint32_t command;
169 uint32_t param1;
170 uint32_t param2;
171 uint32_t texture;
172 float alpha;
173 float red;
174 float green;
175 float blue;
176 };
178 int32_t mmio_region_PVR2TA_read( uint32_t reg )
179 {
180 return 0xFFFFFFFF;
181 }
183 char pvr2ta_remainder[8];
185 void mmio_region_PVR2TA_write( uint32_t reg, uint32_t val )
186 {
187 DEBUG( "Direct write to TA %08X", val );
188 }
190 unsigned int pvr2_last_poly_type = 0;
192 void pvr2ta_write( char *buf, uint32_t length )
193 {
194 int i;
195 struct tacmd *cmd_list = (struct tacmd *)buf;
196 int count = length >> 5;
197 for( i=0; i<count; i++ ){
198 unsigned int type = (cmd_list[i].command >> 24) & 0xFF;
199 DEBUG( "PVR2 cmd: %08X %08X %08X", cmd_list[i].command, cmd_list[i].param1, cmd_list[i].param2 );
200 if( type == 0 ) {
201 /* End of list */
202 switch( pvr2_last_poly_type ) {
203 case 0x80: /* Opaque polys */
204 asic_event( EVENT_PVR_OPAQUE_DONE );
205 break;
206 case 0x81: /* Opaque poly modifier */
207 asic_event( EVENT_PVR_OPAQUEMOD_DONE );
208 break;
209 case 0x82: /* Transparent polys */
210 asic_event( EVENT_PVR_TRANS_DONE );
211 break;
212 case 0x83: /* Transparent poly modifier */
213 asic_event( EVENT_PVR_TRANSMOD_DONE );
214 break;
215 case 0x84: /* Punchthrough */
216 asic_event( EVENT_PVR_PUNCHOUT_DONE );
217 break;
218 }
219 pvr2_last_poly_type = 0;
220 } else if( type >= 0x80 && type <= 0x84 ) {
221 pvr2_last_poly_type = type;
222 }
223 }
224 }
.