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,
25 #include "pixel_ops.h"
29 typedef struct G364State {
30 unsigned int vram_size;
33 uint8_t palette[256][3];
34 /* display refresh support */
38 uint32_t scr_width, 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 switch (ds_get_bits_per_pixel(s->ds)) {
77 g364fb_draw_graphic8(s, full_update);
80 g364fb_draw_graphic15(s, full_update);
83 g364fb_draw_graphic16(s, full_update);
86 g364fb_draw_graphic32(s, full_update);
89 printf("g364fb: unknown depth %d\n", ds_get_bits_per_pixel(s->ds));
93 dpy_update(s->ds, 0, 0, s->scr_width, s->scr_height);
96 static void g364fb_draw_blank(G364State *s, int full_update)
104 w = s->scr_width * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
105 d = ds_get_data(s->ds);
106 for(i = 0; i < s->scr_height; i++) {
108 d += ds_get_linesize(s->ds);
111 dpy_update(s->ds, 0, 0, s->scr_width, s->scr_height);
114 #define GMODE_GRAPH 0
115 #define GMODE_BLANK 1
117 static void g364fb_update_display(void *opaque)
119 G364State *s = opaque;
120 int full_update, graphic_mode;
122 if (s->scr_width == 0 || s->scr_height == 0)
125 if (s->ctla & CTLA_FORCE_BLANK)
126 graphic_mode = GMODE_BLANK;
128 graphic_mode = GMODE_GRAPH;
130 if (graphic_mode != s->graphic_mode) {
131 s->graphic_mode = graphic_mode;
134 if (s->scr_width != ds_get_width(s->ds) || s->scr_height != ds_get_height(s->ds)) {
135 qemu_console_resize(s->console, s->scr_width, s->scr_height);
138 switch(graphic_mode) {
140 g364fb_draw_graphic(s, full_update);
144 g364fb_draw_blank(s, full_update);
149 /* force a full display refresh */
150 static void g364fb_invalidate_display(void *opaque)
152 G364State *s = opaque;
153 s->graphic_mode = -1; /* force full update */
156 static void g364fb_reset(void *opaque)
158 G364State *s = opaque;
160 memset(s->palette, 0, sizeof(s->palette));
161 s->scr_width = s->scr_height = 0;
162 memset(s->vram_buffer, 0, s->vram_size);
163 s->graphic_mode = -1; /* force full update */
166 static void g364fb_screen_dump(void *opaque, const char *filename)
168 G364State *s = opaque;
171 uint8_t *data_buffer;
174 f = fopen(filename, "wb");
178 data_buffer = s->vram_buffer;
179 fprintf(f, "P6\n%d %d\n%d\n",
180 s->scr_width, s->scr_height, 255);
181 for(y = 0; y < s->scr_height; y++)
182 for(x = 0; x < s->scr_width; x++, data_buffer++) {
183 index = *data_buffer;
184 fputc(s->palette[index][0], f);
185 fputc(s->palette[index][1], f);
186 fputc(s->palette[index][2], f);
191 /* called for accesses to io ports */
192 static uint32_t g364fb_ctrl_readb(void *opaque, target_phys_addr_t addr)
194 //G364State *s = opaque;
202 printf("g364fb/ctrl: invalid read at [" TARGET_FMT_lx "]\n", addr);
209 printf("g364fb/ctrl: read 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
215 static uint32_t g364fb_ctrl_readw(void *opaque, target_phys_addr_t addr)
218 v = g364fb_ctrl_readb(opaque, addr);
219 v |= g364fb_ctrl_readb(opaque, addr + 1) << 8;
223 static uint32_t g364fb_ctrl_readl(void *opaque, target_phys_addr_t addr)
226 v = g364fb_ctrl_readb(opaque, addr);
227 v |= g364fb_ctrl_readb(opaque, addr + 1) << 8;
228 v |= g364fb_ctrl_readb(opaque, addr + 2) << 16;
229 v |= g364fb_ctrl_readb(opaque, addr + 3) << 24;
233 static void g364fb_ctrl_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
235 G364State *s = opaque;
240 printf("g364fb/ctrl: write 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
248 s->palette[idx][c] = (uint8_t)val;
252 s->scr_width = (s->scr_width & 0xfffffc03) | (val << 2);
254 case REG_DISPLAYX + 1:
255 s->scr_width = (s->scr_width & 0xfffc03ff) | (val << 10);
258 s->scr_height = (s->scr_height & 0xffffff80) | (val >> 1);
260 case REG_DISPLAYY + 1:
261 s->scr_height = (s->scr_height & 0xffff801f) | (val << 7);
265 printf("g364fb/ctrl: invalid write of 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
270 s->graphic_mode = -1; /* force full update */
273 static void g364fb_ctrl_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
275 g364fb_ctrl_writeb(opaque, addr, val & 0xff);
276 g364fb_ctrl_writeb(opaque, addr + 1, (val >> 8) & 0xff);
279 static void g364fb_ctrl_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
281 g364fb_ctrl_writeb(opaque, addr, val & 0xff);
282 g364fb_ctrl_writeb(opaque, addr + 1, (val >> 8) & 0xff);
283 g364fb_ctrl_writeb(opaque, addr + 2, (val >> 16) & 0xff);
284 g364fb_ctrl_writeb(opaque, addr + 3, (val >> 24) & 0xff);
287 static CPUReadMemoryFunc *g364fb_ctrl_read[3] = {
293 static CPUWriteMemoryFunc *g364fb_ctrl_write[3] = {
299 /* called for accesses to video ram */
300 static uint32_t g364fb_mem_readb(void *opaque, target_phys_addr_t addr)
302 G364State *s = opaque;
304 return s->vram_buffer[addr];
307 static uint32_t g364fb_mem_readw(void *opaque, target_phys_addr_t addr)
310 v = g364fb_mem_readb(opaque, addr);
311 v |= g364fb_mem_readb(opaque, addr + 1) << 8;
315 static uint32_t g364fb_mem_readl(void *opaque, target_phys_addr_t addr)
318 v = g364fb_mem_readb(opaque, addr);
319 v |= g364fb_mem_readb(opaque, addr + 1) << 8;
320 v |= g364fb_mem_readb(opaque, addr + 2) << 16;
321 v |= g364fb_mem_readb(opaque, addr + 3) << 24;
325 static void g364fb_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
327 G364State *s = opaque;
329 s->vram_buffer[addr] = val;
332 static void g364fb_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
334 g364fb_mem_writeb(opaque, addr, val & 0xff);
335 g364fb_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
338 static void g364fb_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
340 g364fb_mem_writeb(opaque, addr, val & 0xff);
341 g364fb_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
342 g364fb_mem_writeb(opaque, addr + 2, (val >> 16) & 0xff);
343 g364fb_mem_writeb(opaque, addr + 3, (val >> 24) & 0xff);
346 static CPUReadMemoryFunc *g364fb_mem_read[3] = {
352 static CPUWriteMemoryFunc *g364fb_mem_write[3] = {
358 int g364fb_mm_init(DisplayState *ds,
359 int vram_size, int it_shift,
360 target_phys_addr_t vram_base, target_phys_addr_t ctrl_base)
363 int io_vram, io_ctrl;
365 s = qemu_mallocz(sizeof(G364State));
369 s->vram_size = vram_size;
370 s->vram_buffer = qemu_mallocz(s->vram_size);
372 qemu_register_reset(g364fb_reset, s);
377 s->console = graphic_console_init(ds, g364fb_update_display,
378 g364fb_invalidate_display,
379 g364fb_screen_dump, NULL, s);
381 io_vram = cpu_register_io_memory(0, g364fb_mem_read, g364fb_mem_write, s);
382 cpu_register_physical_memory(vram_base, vram_size, io_vram);
384 io_ctrl = cpu_register_io_memory(0, g364fb_ctrl_read, g364fb_ctrl_write, s);
385 cpu_register_physical_memory(ctrl_base, 0x10000, io_ctrl);