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lxdream.org :: lxdream/src/pvr2/pvr2.c
lxdream 0.9.1
released Jun 29
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filename src/pvr2/pvr2.c
changeset 161:408b9210395f
prev159:406161fea392
next189:615b70cfd729
author nkeynes
date Sun Jun 18 11:57:05 2006 +0000 (14 years ago)
permissions -rw-r--r--
last change Implement render buffer invalidation
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     1 /**
     2  * $Id: pvr2.c,v 1.27 2006-06-18 11:57:05 nkeynes Exp $
     3  *
     4  * PVR2 (Video) Core module implementation and MMIO registers.
     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 "display.h"
    22 #include "mem.h"
    23 #include "asic.h"
    24 #include "pvr2/pvr2.h"
    25 #include "sh4/sh4core.h"
    26 #define MMIO_IMPL
    27 #include "pvr2/pvr2mmio.h"
    29 char *video_base;
    31 static void pvr2_init( void );
    32 static void pvr2_reset( void );
    33 static uint32_t pvr2_run_slice( uint32_t );
    34 static void pvr2_save_state( FILE *f );
    35 static int pvr2_load_state( FILE *f );
    37 void pvr2_display_frame( void );
    39 int colour_format_bytes[] = { 2, 2, 2, 1, 3, 4, 1, 1 };
    41 struct dreamcast_module pvr2_module = { "PVR2", pvr2_init, pvr2_reset, NULL, 
    42 					pvr2_run_slice, NULL,
    43 					pvr2_save_state, pvr2_load_state };
    46 display_driver_t display_driver = NULL;
    48 struct video_timing {
    49     int fields_per_second;
    50     int total_lines;
    51     int retrace_lines;
    52     int line_time_ns;
    53 };
    55 struct video_timing pal_timing = { 50, 625, 65, 32000 };
    56 struct video_timing ntsc_timing= { 60, 525, 65, 31746 };
    58 struct pvr2_state {
    59     uint32_t frame_count;
    60     uint32_t line_count;
    61     uint32_t line_remainder;
    62     uint32_t irq_vpos1;
    63     uint32_t irq_vpos2;
    64     gboolean retrace;
    65     struct video_timing timing;
    66 } pvr2_state;
    68 struct video_buffer video_buffer[2];
    69 int video_buffer_idx = 0;
    71 static void pvr2_init( void )
    72 {
    73     register_io_region( &mmio_region_PVR2 );
    74     register_io_region( &mmio_region_PVR2PAL );
    75     register_io_region( &mmio_region_PVR2TA );
    76     video_base = mem_get_region_by_name( MEM_REGION_VIDEO );
    77     texcache_init();
    78     pvr2_reset();
    79 }
    81 static void pvr2_reset( void )
    82 {
    83     pvr2_state.line_count = 0;
    84     pvr2_state.line_remainder = 0;
    85     pvr2_state.irq_vpos1 = 0;
    86     pvr2_state.irq_vpos2 = 0;
    87     pvr2_state.retrace = FALSE;
    88     pvr2_state.timing = ntsc_timing;
    89     video_buffer_idx = 0;
    91     pvr2_ta_init();
    92     pvr2_render_init();
    93     texcache_flush();
    94 }
    96 static void pvr2_save_state( FILE *f )
    97 {
    98     fwrite( &pvr2_state, sizeof(pvr2_state), 1, f );
    99 }
   101 static int pvr2_load_state( FILE *f )
   102 {
   103     if( fread( &pvr2_state, sizeof(pvr2_state), 1, f ) != 1 )
   104 	return 1;
   105     return 0;
   106 }
   108 static uint32_t pvr2_run_slice( uint32_t nanosecs ) 
   109 {
   110     pvr2_state.line_remainder += nanosecs;
   111     while( pvr2_state.line_remainder >= pvr2_state.timing.line_time_ns ) {
   112 	pvr2_state.line_remainder -= pvr2_state.timing.line_time_ns;
   114 	pvr2_state.line_count++;
   115 	if( pvr2_state.line_count == pvr2_state.timing.total_lines ) {
   116 	    asic_event( EVENT_RETRACE );
   117 	    pvr2_state.line_count = 0;
   118 	    pvr2_state.retrace = TRUE;
   119 	}
   121 	if( pvr2_state.line_count == pvr2_state.irq_vpos1 ) {
   122 	    asic_event( EVENT_SCANLINE1 );
   123 	} 
   124 	if( pvr2_state.line_count == pvr2_state.irq_vpos2 ) {
   125 	    asic_event( EVENT_SCANLINE2 );
   126 	}
   128 	if( pvr2_state.line_count == pvr2_state.timing.retrace_lines ) {
   129 	    if( pvr2_state.retrace ) {
   130 		pvr2_display_frame();
   131 		pvr2_state.retrace = FALSE;
   132 	    }
   133 	}
   134     }
   135     return nanosecs;
   136 }
   138 int pvr2_get_frame_count() 
   139 {
   140     return pvr2_state.frame_count;
   141 }
   143 /**
   144  * Display the next frame, copying the current contents of video ram to
   145  * the window. If the video configuration has changed, first recompute the
   146  * new frame size/depth.
   147  */
   148 void pvr2_display_frame( void )
   149 {
   150     uint32_t display_addr = MMIO_READ( PVR2, DISPADDR1 );
   152     int dispsize = MMIO_READ( PVR2, DISPSIZE );
   153     int dispmode = MMIO_READ( PVR2, DISPMODE );
   154     int vidcfg = MMIO_READ( PVR2, DISPCFG );
   155     int vid_stride = ((dispsize & DISPSIZE_MODULO) >> 20) - 1;
   156     int vid_lpf = ((dispsize & DISPSIZE_LPF) >> 10) + 1;
   157     int vid_ppl = ((dispsize & DISPSIZE_PPL)) + 1;
   158     gboolean bEnabled = (dispmode & DISPMODE_DE) && (vidcfg & DISPCFG_VO ) ? TRUE : FALSE;
   159     gboolean interlaced = (vidcfg & DISPCFG_I ? TRUE : FALSE);
   160     video_buffer_t buffer = &video_buffer[video_buffer_idx];
   161     video_buffer_idx = !video_buffer_idx;
   162     video_buffer_t last = &video_buffer[video_buffer_idx];
   163     buffer->rowstride = (vid_ppl + vid_stride) << 2;
   164     buffer->data = video_base + MMIO_READ( PVR2, DISPADDR1 );
   165     buffer->vres = vid_lpf;
   166     if( interlaced ) buffer->vres <<= 1;
   167     switch( (dispmode & DISPMODE_COL) >> 2 ) {
   168     case 0: 
   169 	buffer->colour_format = COLFMT_ARGB1555;
   170 	buffer->hres = vid_ppl << 1; 
   171 	break;
   172     case 1: 
   173 	buffer->colour_format = COLFMT_RGB565;
   174 	buffer->hres = vid_ppl << 1; 
   175 	break;
   176     case 2:
   177 	buffer->colour_format = COLFMT_RGB888;
   178 	buffer->hres = (vid_ppl << 2) / 3; 
   179 	break;
   180     case 3: 
   181 	buffer->colour_format = COLFMT_ARGB8888;
   182 	buffer->hres = vid_ppl; 
   183 	break;
   184     }
   186     if( buffer->hres <=8 )
   187 	buffer->hres = 640;
   188     if( buffer->vres <=8 )
   189 	buffer->vres = 480;
   190     if( display_driver != NULL ) {
   191 	if( buffer->hres != last->hres ||
   192 	    buffer->vres != last->vres ||
   193 	    buffer->colour_format != last->colour_format) {
   194 	    display_driver->set_display_format( buffer->hres, buffer->vres,
   195 						buffer->colour_format );
   196 	}
   197 	if( !bEnabled ) {
   198 	    display_driver->display_blank_frame( 0 );
   199 	} else if( MMIO_READ( PVR2, DISPCFG2 ) & 0x08 ) { /* Blanked */
   200 	    uint32_t colour = MMIO_READ( PVR2, DISPBORDER );
   201 	    display_driver->display_blank_frame( colour );
   202 	} else if( !pvr2_render_display_frame( PVR2_RAM_BASE + display_addr ) ) {
   203 	    display_driver->display_frame( buffer );
   204 	}
   205     }
   206     pvr2_state.frame_count++;
   207 }
   209 void mmio_region_PVR2_write( uint32_t reg, uint32_t val )
   210 {
   211     if( reg >= 0x200 && reg < 0x600 ) { /* Fog table */
   212         MMIO_WRITE( PVR2, reg, val );
   213         /* I don't want to hear about these */
   214         return;
   215     }
   217     if( reg == PVRID ) {
   218 	ERROR( "Write attempted to readonly register PVRID: ", val );
   219 	return;
   220     }
   222     MMIO_WRITE( PVR2, reg, val );
   224     switch(reg) {
   225     case DISPADDR1:
   226 	if( pvr2_state.retrace ) {
   227 	    pvr2_display_frame();
   228 	    pvr2_state.retrace = FALSE;
   229 	}
   230 	break;
   231     case VPOS_IRQ:
   232 	pvr2_state.irq_vpos1 = (val >> 16) & 0x03FF;
   233 	pvr2_state.irq_vpos2 = val & 0x03FF;
   234 	break;
   235     case TAINIT:
   236 	if( val & 0x80000000 )
   237 	    pvr2_ta_init();
   238 	break;
   239     case RENDSTART:
   240 	if( val == 0xFFFFFFFF )
   241 	    pvr2_render_scene();
   242 	break;
   243     }
   244 }
   246 MMIO_REGION_READ_FN( PVR2, reg )
   247 {
   248     switch( reg ) {
   249         case BEAMPOS:
   250             return sh4r.icount&0x20 ? 0x2000 : 1;
   251         default:
   252             return MMIO_READ( PVR2, reg );
   253     }
   254 }
   256 MMIO_REGION_DEFFNS( PVR2PAL )
   258 void pvr2_set_base_address( uint32_t base ) 
   259 {
   260     mmio_region_PVR2_write( DISPADDR1, base );
   261 }
   266 int32_t mmio_region_PVR2TA_read( uint32_t reg )
   267 {
   268     return 0xFFFFFFFF;
   269 }
   271 void mmio_region_PVR2TA_write( uint32_t reg, uint32_t val )
   272 {
   273     pvr2_ta_write( &val, sizeof(uint32_t) );
   274 }
   277 void pvr2_vram64_write( sh4addr_t destaddr, char *src, uint32_t length )
   278 {
   279     int bank_flag = (destaddr & 0x04) >> 2;
   280     uint32_t *banks[2];
   281     uint32_t *dwsrc;
   282     int i;
   284     destaddr = destaddr & 0x7FFFFF;
   285     if( destaddr + length > 0x800000 ) {
   286 	length = 0x800000 - destaddr;
   287     }
   289     for( i=destaddr & 0xFFFFF000; i < destaddr + length; i+= PAGE_SIZE ) {
   290 	texcache_invalidate_page( i );
   291     }
   293     banks[0] = ((uint32_t *)(video_base + ((destaddr & 0x007FFFF8) >>1)));
   294     banks[1] = banks[0] + 0x100000;
   295     if( bank_flag ) 
   296 	banks[0]++;
   298     /* Handle non-aligned start of source */
   299     if( destaddr & 0x03 ) {
   300 	char *dest = ((char *)banks[bank_flag]) + (destaddr & 0x03);
   301 	for( i= destaddr & 0x03; i < 4 && length > 0; i++, length-- ) {
   302 	    *dest++ = *src++;
   303 	}
   304 	bank_flag = !bank_flag;
   305     }
   307     dwsrc = (uint32_t *)src;
   308     while( length >= 4 ) {
   309 	*banks[bank_flag]++ = *dwsrc++;
   310 	bank_flag = !bank_flag;
   311 	length -= 4;
   312     }
   314     /* Handle non-aligned end of source */
   315     if( length ) {
   316 	src = (char *)dwsrc;
   317 	char *dest = (char *)banks[bank_flag];
   318 	while( length-- > 0 ) {
   319 	    *dest++ = *src++;
   320 	}
   321     }  
   323 }
   325 void pvr2_vram64_read( char *dest, sh4addr_t srcaddr, uint32_t length )
   326 {
   327     int bank_flag = (srcaddr & 0x04) >> 2;
   328     uint32_t *banks[2];
   329     uint32_t *dwdest;
   330     int i;
   332     srcaddr = srcaddr & 0x7FFFFF;
   333     if( srcaddr + length > 0x800000 )
   334 	length = 0x800000 - srcaddr;
   336     banks[0] = ((uint32_t *)(video_base + ((srcaddr&0x007FFFF8)>>1)));
   337     banks[1] = banks[0] + 0x100000;
   338     if( bank_flag )
   339 	banks[0]++;
   341     /* Handle non-aligned start of source */
   342     if( srcaddr & 0x03 ) {
   343 	char *src = ((char *)banks[bank_flag]) + (srcaddr & 0x03);
   344 	for( i= srcaddr & 0x03; i < 4 && length > 0; i++, length-- ) {
   345 	    *dest++ = *src++;
   346 	}
   347 	bank_flag = !bank_flag;
   348     }
   350     dwdest = (uint32_t *)dest;
   351     while( length >= 4 ) {
   352 	*dwdest++ = *banks[bank_flag]++;
   353 	bank_flag = !bank_flag;
   354 	length -= 4;
   355     }
   357     /* Handle non-aligned end of source */
   358     if( length ) {
   359 	dest = (char *)dwdest;
   360 	char *src = (char *)banks[bank_flag];
   361 	while( length-- > 0 ) {
   362 	    *dest++ = *src++;
   363 	}
   364     }
   365 }
   367 void pvr2_vram64_dump( sh4addr_t addr, uint32_t length, FILE *f ) 
   368 {
   369     char tmp[length];
   370     pvr2_vram64_read( tmp, addr, length );
   371     fwrite_dump( tmp, length, f );
   372 }
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