2 * QEMU G364 framebuffer Emulator.
4 * Copyright (c) 2007-2008 Hervé Poussineau
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include "pixel_ops.h"
28 typedef struct G364State {
29 target_phys_addr_t vram_base;
30 unsigned int vram_size;
33 uint8_t palette[256][3];
34 /* display refresh support */
37 uint32_t scr_width, scr_height; /* in pixels */
38 uint32_t last_scr_width, last_scr_height; /* in pixels */
46 #include "g364fb_template.h"
51 #define PIXEL_WIDTH 16
52 #include "g364fb_template.h"
57 #define PIXEL_WIDTH 16
58 #include "g364fb_template.h"
63 #define PIXEL_WIDTH 32
64 #include "g364fb_template.h"
68 #define REG_DISPLAYX 0x0918
69 #define REG_DISPLAYY 0x0940
71 #define CTLA_FORCE_BLANK 0x400
73 static void g364fb_draw_graphic(G364State *s, int full_update)
75 if (s->scr_width == 0 || s->scr_height == 0)
77 if (s->scr_width != s->last_scr_width
78 || s->scr_height != s->last_scr_height) {
79 s->last_scr_width = s->scr_width;
80 s->last_scr_height = s->scr_height;
81 dpy_resize(s->ds, s->last_scr_width, s->last_scr_height);
85 switch (s->ds->depth) {
87 g364fb_draw_graphic8(s, full_update);
90 g364fb_draw_graphic15(s, full_update);
93 g364fb_draw_graphic16(s, full_update);
96 g364fb_draw_graphic32(s, full_update);
99 printf("g364fb: unknown depth %d\n", s->ds->depth);
103 dpy_update(s->ds, 0, 0, s->last_scr_width, s->last_scr_height);
106 static void g364fb_draw_blank(G364State *s, int full_update)
113 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
116 w = s->last_scr_width * ((s->ds->depth + 7) >> 3);
118 for(i = 0; i < s->last_scr_height; i++) {
120 d += s->ds->linesize;
122 dpy_update(s->ds, 0, 0,
123 s->last_scr_width, s->last_scr_height);
126 #define GMODE_GRAPH 0
127 #define GMODE_BLANK 1
129 static void g364fb_update_display(void *opaque)
131 G364State *s = opaque;
132 int full_update, graphic_mode;
134 if (s->ctla & CTLA_FORCE_BLANK)
135 graphic_mode = GMODE_BLANK;
137 graphic_mode = GMODE_GRAPH;
139 if (graphic_mode != s->graphic_mode) {
140 s->graphic_mode = graphic_mode;
143 switch(graphic_mode) {
145 g364fb_draw_graphic(s, full_update);
149 g364fb_draw_blank(s, full_update);
154 /* force a full display refresh */
155 static void g364fb_invalidate_display(void *opaque)
157 G364State *s = opaque;
158 s->graphic_mode = -1; /* force full update */
161 static void g364fb_reset(void *opaque)
163 G364State *s = opaque;
165 memset(s->palette, 0, sizeof(s->palette));
166 s->scr_width = s->scr_height = 0;
167 s->last_scr_width = s->last_scr_height = 0;
168 memset(s->vram_buffer, 0, s->vram_size);
169 s->graphic_mode = -1; /* force full update */
172 static void g364fb_screen_dump(void *opaque, const char *filename)
174 G364State *s = opaque;
177 uint8_t *data_buffer;
180 f = fopen(filename, "wb");
184 data_buffer = s->vram_buffer;
185 fprintf(f, "P6\n%d %d\n%d\n",
186 s->scr_width, s->scr_height, 255);
187 for(y = 0; y < s->scr_height; y++)
188 for(x = 0; x < s->scr_width; x++, data_buffer++) {
189 index = *data_buffer;
190 fputc(s->palette[index][0], f);
191 fputc(s->palette[index][1], f);
192 fputc(s->palette[index][2], f);
197 /* called for accesses to io ports */
198 static uint32_t g364fb_ctrl_readb(void *opaque, target_phys_addr_t addr)
200 //G364State *s = opaque;
208 printf("g364fb/ctrl: invalid read at [" TARGET_FMT_lx "]\n", addr);
215 printf("g364fb/ctrl: read 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
221 static uint32_t g364fb_ctrl_readw(void *opaque, target_phys_addr_t addr)
224 v = g364fb_ctrl_readb(opaque, addr);
225 v |= g364fb_ctrl_readb(opaque, addr + 1) << 8;
229 static uint32_t g364fb_ctrl_readl(void *opaque, target_phys_addr_t addr)
232 v = g364fb_ctrl_readb(opaque, addr);
233 v |= g364fb_ctrl_readb(opaque, addr + 1) << 8;
234 v |= g364fb_ctrl_readb(opaque, addr + 2) << 16;
235 v |= g364fb_ctrl_readb(opaque, addr + 3) << 24;
239 static void g364fb_ctrl_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
241 G364State *s = opaque;
246 printf("g364fb/ctrl: write 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
254 s->palette[idx][c] = (uint8_t)val;
258 s->scr_width = (s->scr_width & 0xfffffc03) | (val << 2);
260 case REG_DISPLAYX + 1:
261 s->scr_width = (s->scr_width & 0xfffc03ff) | (val << 10);
264 s->scr_height = (s->scr_height & 0xffffff80) | (val >> 1);
266 case REG_DISPLAYY + 1:
267 s->scr_height = (s->scr_height & 0xffff801f) | (val << 7);
271 printf("g364fb/ctrl: invalid write of 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
278 static void g364fb_ctrl_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
280 g364fb_ctrl_writeb(opaque, addr, val & 0xff);
281 g364fb_ctrl_writeb(opaque, addr + 1, (val >> 8) & 0xff);
284 static void g364fb_ctrl_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
286 g364fb_ctrl_writeb(opaque, addr, val & 0xff);
287 g364fb_ctrl_writeb(opaque, addr + 1, (val >> 8) & 0xff);
288 g364fb_ctrl_writeb(opaque, addr + 2, (val >> 16) & 0xff);
289 g364fb_ctrl_writeb(opaque, addr + 3, (val >> 24) & 0xff);
292 static CPUReadMemoryFunc *g364fb_ctrl_read[3] = {
298 static CPUWriteMemoryFunc *g364fb_ctrl_write[3] = {
304 /* called for accesses to video ram */
305 static uint32_t g364fb_mem_readb(void *opaque, target_phys_addr_t addr)
307 G364State *s = opaque;
308 target_phys_addr_t relative_addr = addr - s->vram_base;
310 return s->vram_buffer[relative_addr];
313 static uint32_t g364fb_mem_readw(void *opaque, target_phys_addr_t addr)
316 v = g364fb_mem_readb(opaque, addr);
317 v |= g364fb_mem_readb(opaque, addr + 1) << 8;
321 static uint32_t g364fb_mem_readl(void *opaque, target_phys_addr_t addr)
324 v = g364fb_mem_readb(opaque, addr);
325 v |= g364fb_mem_readb(opaque, addr + 1) << 8;
326 v |= g364fb_mem_readb(opaque, addr + 2) << 16;
327 v |= g364fb_mem_readb(opaque, addr + 3) << 24;
331 static void g364fb_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
333 G364State *s = opaque;
334 target_phys_addr_t relative_addr = addr - s->vram_base;
336 s->vram_buffer[relative_addr] = val;
339 static void g364fb_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
341 g364fb_mem_writeb(opaque, addr, val & 0xff);
342 g364fb_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
345 static void g364fb_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
347 g364fb_mem_writeb(opaque, addr, val & 0xff);
348 g364fb_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
349 g364fb_mem_writeb(opaque, addr + 2, (val >> 16) & 0xff);
350 g364fb_mem_writeb(opaque, addr + 3, (val >> 24) & 0xff);
353 static CPUReadMemoryFunc *g364fb_mem_read[3] = {
359 static CPUWriteMemoryFunc *g364fb_mem_write[3] = {
365 int g364fb_mm_init(DisplayState *ds,
366 int vram_size, int it_shift,
367 target_phys_addr_t vram_base, target_phys_addr_t ctrl_base)
370 int io_vram, io_ctrl;
372 s = qemu_mallocz(sizeof(G364State));
376 s->vram_size = vram_size;
377 s->vram_buffer = qemu_mallocz(s->vram_size);
379 qemu_register_reset(g364fb_reset, s);
383 s->vram_base = vram_base;
385 graphic_console_init(ds, g364fb_update_display,
386 g364fb_invalidate_display, g364fb_screen_dump,
389 io_vram = cpu_register_io_memory(0, g364fb_mem_read, g364fb_mem_write, s);
390 cpu_register_physical_memory(s->vram_base, vram_size, io_vram);
392 io_ctrl = cpu_register_io_memory(0, g364fb_ctrl_read, g364fb_ctrl_write, s);
393 cpu_register_physical_memory(ctrl_base, 0x10000, io_ctrl);