lxdream 0.9.1| filename | src/pvr2/pvr2.c |
| changeset | 19:9da7a8e38f9d |
| prev | 16:f383e7640da4 |
| next | 23:1ec3acd0594d |
| author | nkeynes |
| date | Thu Dec 22 07:38:12 2005 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Implement 95% of the SCIF serial interface Implement basic load_bin_file function to try to load demos directly Update TMU to run all 3 timers, start on general timing |
| view | annotate | diff | log | raw |
1 #include "dream.h"
2 #include "video.h"
3 #include "mem.h"
4 #include "asic.h"
5 #include "modules.h"
6 #include "pvr2.h"
7 #define MMIO_IMPL
8 #include "pvr2.h"
10 char *video_base;
12 void pvr2_init( void );
14 struct dreamcast_module pvr2_module = { "PVR2", pvr2_init, NULL, NULL, NULL,
15 NULL, NULL };
17 void pvr2_init( void )
18 {
19 register_io_region( &mmio_region_PVR2 );
20 video_base = mem_get_region_by_name( MEM_REGION_VIDEO );
21 }
23 uint32_t vid_stride, vid_lpf, vid_ppl, vid_hres, vid_vres, vid_col;
24 int interlaced, bChanged = 1, bEnabled = 0, vid_size = 0;
25 char *frame_start; /* current video start address (in real memory) */
27 /*
28 * Display the next frame, copying the current contents of video ram to
29 * the window. If the video configuration has changed, first recompute the
30 * new frame size/depth.
31 */
32 void pvr2_next_frame( void )
33 {
34 if( bChanged ) {
35 int dispsize = MMIO_READ( PVR2, DISPSIZE );
36 int dispmode = MMIO_READ( PVR2, DISPMODE );
37 int vidcfg = MMIO_READ( PVR2, VIDCFG );
38 vid_stride = ((dispsize & DISPSIZE_MODULO) >> 20) - 1;
39 vid_lpf = ((dispsize & DISPSIZE_LPF) >> 10) + 1;
40 vid_ppl = ((dispsize & DISPSIZE_PPL)) + 1;
41 vid_col = (dispmode & DISPMODE_COL);
42 frame_start = video_base + MMIO_READ( PVR2, DISPADDR1 );
43 interlaced = (vidcfg & VIDCFG_I ? 1 : 0);
44 bEnabled = (dispmode & DISPMODE_DE) && (vidcfg & VIDCFG_VO ) ? 1 : 0;
45 vid_size = (vid_ppl * vid_lpf) << (interlaced ? 3 : 2);
46 vid_hres = vid_ppl;
47 vid_vres = vid_lpf;
48 if( interlaced ) vid_vres <<= 1;
49 switch( vid_col ) {
50 case MODE_RGB15:
51 case MODE_RGB16: vid_hres <<= 1; break;
52 case MODE_RGB24: vid_hres *= 3; break;
53 case MODE_RGB32: vid_hres <<= 2; break;
54 }
55 vid_hres >>= 2;
56 video_update_size( vid_hres, vid_vres, vid_col );
57 bChanged = 0;
58 }
59 if( bEnabled ) {
60 /* Assume bit depths match for now... */
61 memcpy( video_data, frame_start, vid_size );
62 } else {
63 memset( video_data, 0, vid_size );
64 }
65 video_update_frame();
66 asic_event( EVENT_SCANLINE1 );
67 asic_event( EVENT_SCANLINE2 );
68 asic_event( EVENT_RETRACE );
69 }
71 void mmio_region_PVR2_write( uint32_t reg, uint32_t val )
72 {
73 if( reg >= 0x200 && reg < 0x600 ) { /* Fog table */
74 MMIO_WRITE( PVR2, reg, val );
75 /* I don't want to hear about these */
76 return;
77 }
79 INFO( "PVR2 write to %08X <= %08X [%s: %s]", reg, val,
80 MMIO_REGID(PVR2,reg), MMIO_REGDESC(PVR2,reg) );
82 switch(reg) {
83 case DISPSIZE: bChanged = 1;
84 case DISPMODE: bChanged = 1;
85 case DISPADDR1: bChanged = 1;
86 case DISPADDR2: bChanged = 1;
87 case VIDCFG: bChanged = 1;
88 break;
90 }
91 MMIO_WRITE( PVR2, reg, val );
92 }
94 MMIO_REGION_READ_FN( PVR2, reg )
95 {
96 switch( reg ) {
97 case BEAMPOS:
98 return sh4r.icount&0x20 ? 0x2000 : 1;
99 default:
100 return MMIO_READ( PVR2, reg );
101 }
102 }
104 void pvr2_set_base_address( uint32_t base )
105 {
106 mmio_region_PVR2_write( DISPADDR1, base );
107 }
.