PPC: e500mc: add missing IVORs to bitmap
[qemu.git] / hw / milkymist-vgafb.c
1
2 /*
3 * QEMU model of the Milkymist VGA framebuffer.
4 *
5 * Copyright (c) 2010 Michael Walle <michael@walle.cc>
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
19 *
20 *
21 * Specification available at:
22 * http://www.milkymist.org/socdoc/vgafb.pdf
23 */
24
25 #include "hw.h"
26 #include "sysbus.h"
27 #include "trace.h"
28 #include "console.h"
29 #include "framebuffer.h"
30 #include "pixel_ops.h"
31 #include "qemu-error.h"
32
33 #define BITS 8
34 #include "milkymist-vgafb_template.h"
35 #define BITS 15
36 #include "milkymist-vgafb_template.h"
37 #define BITS 16
38 #include "milkymist-vgafb_template.h"
39 #define BITS 24
40 #include "milkymist-vgafb_template.h"
41 #define BITS 32
42 #include "milkymist-vgafb_template.h"
43
44 enum {
45 R_CTRL = 0,
46 R_HRES,
47 R_HSYNC_START,
48 R_HSYNC_END,
49 R_HSCAN,
50 R_VRES,
51 R_VSYNC_START,
52 R_VSYNC_END,
53 R_VSCAN,
54 R_BASEADDRESS,
55 R_BASEADDRESS_ACT,
56 R_BURST_COUNT,
57 R_SOURCE_CLOCK,
58 R_MAX
59 };
60
61 enum {
62 CTRL_RESET = (1<<0),
63 };
64
65 struct MilkymistVgafbState {
66 SysBusDevice busdev;
67 MemoryRegion regs_region;
68 DisplayState *ds;
69
70 int invalidate;
71 uint32_t fb_offset;
72 uint32_t fb_mask;
73
74 uint32_t regs[R_MAX];
75 };
76 typedef struct MilkymistVgafbState MilkymistVgafbState;
77
78 static int vgafb_enabled(MilkymistVgafbState *s)
79 {
80 return !(s->regs[R_CTRL] & CTRL_RESET);
81 }
82
83 static void vgafb_update_display(void *opaque)
84 {
85 MilkymistVgafbState *s = opaque;
86 int first = 0;
87 int last = 0;
88 drawfn fn;
89
90 if (!vgafb_enabled(s)) {
91 return;
92 }
93
94 int dest_width = s->regs[R_HRES];
95
96 switch (ds_get_bits_per_pixel(s->ds)) {
97 case 0:
98 return;
99 case 8:
100 fn = draw_line_8;
101 break;
102 case 15:
103 fn = draw_line_15;
104 dest_width *= 2;
105 break;
106 case 16:
107 fn = draw_line_16;
108 dest_width *= 2;
109 break;
110 case 24:
111 fn = draw_line_24;
112 dest_width *= 3;
113 break;
114 case 32:
115 fn = draw_line_32;
116 dest_width *= 4;
117 break;
118 default:
119 hw_error("milkymist_vgafb: bad color depth\n");
120 break;
121 }
122
123 framebuffer_update_display(s->ds, sysbus_address_space(&s->busdev),
124 s->regs[R_BASEADDRESS] + s->fb_offset,
125 s->regs[R_HRES],
126 s->regs[R_VRES],
127 s->regs[R_HRES] * 2,
128 dest_width,
129 0,
130 s->invalidate,
131 fn,
132 NULL,
133 &first, &last);
134
135 if (first >= 0) {
136 dpy_update(s->ds, 0, first, s->regs[R_HRES], last - first + 1);
137 }
138 s->invalidate = 0;
139 }
140
141 static void vgafb_invalidate_display(void *opaque)
142 {
143 MilkymistVgafbState *s = opaque;
144 s->invalidate = 1;
145 }
146
147 static void vgafb_resize(MilkymistVgafbState *s)
148 {
149 if (!vgafb_enabled(s)) {
150 return;
151 }
152
153 qemu_console_resize(s->ds, s->regs[R_HRES], s->regs[R_VRES]);
154 s->invalidate = 1;
155 }
156
157 static uint64_t vgafb_read(void *opaque, target_phys_addr_t addr,
158 unsigned size)
159 {
160 MilkymistVgafbState *s = opaque;
161 uint32_t r = 0;
162
163 addr >>= 2;
164 switch (addr) {
165 case R_CTRL:
166 case R_HRES:
167 case R_HSYNC_START:
168 case R_HSYNC_END:
169 case R_HSCAN:
170 case R_VRES:
171 case R_VSYNC_START:
172 case R_VSYNC_END:
173 case R_VSCAN:
174 case R_BASEADDRESS:
175 case R_BURST_COUNT:
176 case R_SOURCE_CLOCK:
177 r = s->regs[addr];
178 break;
179 case R_BASEADDRESS_ACT:
180 r = s->regs[R_BASEADDRESS];
181 break;
182
183 default:
184 error_report("milkymist_vgafb: read access to unknown register 0x"
185 TARGET_FMT_plx, addr << 2);
186 break;
187 }
188
189 trace_milkymist_vgafb_memory_read(addr << 2, r);
190
191 return r;
192 }
193
194 static void vgafb_write(void *opaque, target_phys_addr_t addr, uint64_t value,
195 unsigned size)
196 {
197 MilkymistVgafbState *s = opaque;
198
199 trace_milkymist_vgafb_memory_write(addr, value);
200
201 addr >>= 2;
202 switch (addr) {
203 case R_CTRL:
204 s->regs[addr] = value;
205 vgafb_resize(s);
206 break;
207 case R_HSYNC_START:
208 case R_HSYNC_END:
209 case R_HSCAN:
210 case R_VSYNC_START:
211 case R_VSYNC_END:
212 case R_VSCAN:
213 case R_BURST_COUNT:
214 case R_SOURCE_CLOCK:
215 s->regs[addr] = value;
216 break;
217 case R_BASEADDRESS:
218 if (value & 0x1f) {
219 error_report("milkymist_vgafb: framebuffer base address have to "
220 "be 32 byte aligned");
221 break;
222 }
223 s->regs[addr] = value & s->fb_mask;
224 s->invalidate = 1;
225 break;
226 case R_HRES:
227 case R_VRES:
228 s->regs[addr] = value;
229 vgafb_resize(s);
230 break;
231 case R_BASEADDRESS_ACT:
232 error_report("milkymist_vgafb: write to read-only register 0x"
233 TARGET_FMT_plx, addr << 2);
234 break;
235
236 default:
237 error_report("milkymist_vgafb: write access to unknown register 0x"
238 TARGET_FMT_plx, addr << 2);
239 break;
240 }
241 }
242
243 static const MemoryRegionOps vgafb_mmio_ops = {
244 .read = vgafb_read,
245 .write = vgafb_write,
246 .valid = {
247 .min_access_size = 4,
248 .max_access_size = 4,
249 },
250 .endianness = DEVICE_NATIVE_ENDIAN,
251 };
252
253 static void milkymist_vgafb_reset(DeviceState *d)
254 {
255 MilkymistVgafbState *s = container_of(d, MilkymistVgafbState, busdev.qdev);
256 int i;
257
258 for (i = 0; i < R_MAX; i++) {
259 s->regs[i] = 0;
260 }
261
262 /* defaults */
263 s->regs[R_CTRL] = CTRL_RESET;
264 s->regs[R_HRES] = 640;
265 s->regs[R_VRES] = 480;
266 s->regs[R_BASEADDRESS] = 0;
267 }
268
269 static int milkymist_vgafb_init(SysBusDevice *dev)
270 {
271 MilkymistVgafbState *s = FROM_SYSBUS(typeof(*s), dev);
272
273 memory_region_init_io(&s->regs_region, &vgafb_mmio_ops, s,
274 "milkymist-vgafb", R_MAX * 4);
275 sysbus_init_mmio(dev, &s->regs_region);
276
277 s->ds = graphic_console_init(vgafb_update_display,
278 vgafb_invalidate_display,
279 NULL, NULL, s);
280
281 return 0;
282 }
283
284 static int vgafb_post_load(void *opaque, int version_id)
285 {
286 vgafb_invalidate_display(opaque);
287 return 0;
288 }
289
290 static const VMStateDescription vmstate_milkymist_vgafb = {
291 .name = "milkymist-vgafb",
292 .version_id = 1,
293 .minimum_version_id = 1,
294 .minimum_version_id_old = 1,
295 .post_load = vgafb_post_load,
296 .fields = (VMStateField[]) {
297 VMSTATE_UINT32_ARRAY(regs, MilkymistVgafbState, R_MAX),
298 VMSTATE_END_OF_LIST()
299 }
300 };
301
302 static Property milkymist_vgafb_properties[] = {
303 DEFINE_PROP_UINT32("fb_offset", MilkymistVgafbState, fb_offset, 0x0),
304 DEFINE_PROP_UINT32("fb_mask", MilkymistVgafbState, fb_mask, 0xffffffff),
305 DEFINE_PROP_END_OF_LIST(),
306 };
307
308 static void milkymist_vgafb_class_init(ObjectClass *klass, void *data)
309 {
310 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
311
312 k->init = milkymist_vgafb_init;
313 }
314
315 static DeviceInfo milkymist_vgafb_info = {
316 .name = "milkymist-vgafb",
317 .size = sizeof(MilkymistVgafbState),
318 .vmsd = &vmstate_milkymist_vgafb,
319 .reset = milkymist_vgafb_reset,
320 .props = milkymist_vgafb_properties,
321 .class_init = milkymist_vgafb_class_init,
322 };
323
324 static void milkymist_vgafb_register(void)
325 {
326 sysbus_register_withprop(&milkymist_vgafb_info);
327 }
328
329 device_init(milkymist_vgafb_register)