/[gxemul]/trunk/src/devices/dev_kn01.c
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Contents of /trunk/src/devices/dev_kn01.c

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Revision 4 - (show annotations)
Mon Oct 8 16:18:00 2007 UTC (12 years, 3 months ago) by dpavlin
File MIME type: text/plain
File size: 7386 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.707 2005/04/27 16:37:33 debug Exp $
20050408	Some minor updates to the wdc. Linux now doesn't complain
		anymore if a disk is non-present.
20050409	Various minor fixes (a bintrans bug, and some other things).
		The wdc seems to work with Playstation2 emulation, but there
		is a _long_ annoying delay when disks are detected.
		Fixing a really important bintrans bug (when devices and RAM
		are mixed within 4KB pages), which was triggered with
		NetBSD/playstation2 kernels.
20050410	Adding a dummy dev_ps2_ether (just so that NetBSD doesn't
		complain as much during bootup).
		Symbols starting with '$' are now ignored.
		Renaming dev_ps2_ohci.c to dev_ohci.c, etc.
20050411	Moving the bintrans-cache-isolation check from cpu_mips.c to
		cpu_mips_coproc.c. (I thought this would give a speedup, but
		it's not noticable.)
		Better playstation2 sbus interrupt code.
		Skip ahead many ticks if the count register is read manually.
		(This increases the speed of delay-loops that simply read
		the count register.)
20050412	Updates to the playstation2 timer/interrupt code.
		Some other minor updates.
20050413	NetBSD/cobalt runs from a disk image :-) including userland;
		updating the documentation on how to install NetBSD/cobalt
		using NetBSD/pmax (!).
		Some minor bintrans updates (no real speed improvement) and
		other minor updates (playstation2 now uses the -o options).
20050414	Adding a dummy x86 (and AMD64) mode.
20050415	Adding some (32-bit and 16-bit) x86 instructions.
		Adding some initial support for non-SCSI, non-IDE floppy
		images. (The x86 mode can boot from these, more or less.)
		Moving the devices/ and include/ directories to src/devices/
		and src/include/, respectively.
20050416	Continuing on the x86 stuff. (Adding pc_bios.c and some simple
		support for software interrupts in 16-bit mode.)
20050417	Ripping out most of the x86 instruction decoding stuff, trying
		to rewrite it in a cleaner way.
		Disabling some of the least working CPU families in the
		configure script (sparc, x86, alpha, hppa), so that they are
		not enabled by default.
20050418	Trying to fix the bug which caused problems when turning on
		and off bintrans interactively, by flushing the bintrans cache
		whenever bintrans is manually (re)enabled.
20050419	Adding the 'lswi' ppc instruction.
		Minor updates to the x86 instruction decoding.
20050420	Renaming x86 register name indices from R_xx to X86_R_xx (this
		makes building on Tru64 nicer).
20050422	Adding a check for duplicate MIPS TLB entries on tlbwr/tlbwi.
20050427	Adding screenshots to guestoses.html.
		Some minor fixes and testing for the next release.

==============  RELEASE 0.3.2  ==============


1 /*
2 * Copyright (C) 2003-2005 Anders Gavare. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 *
28 * $Id: dev_kn01.c,v 1.6 2005/02/11 09:53:48 debug Exp $
29 *
30 * KN01 stuff ("PMAX", DECstation type 1); CSR (System Control Register)
31 * and VDAC.
32 *
33 * TODO: The CSR isn't really complete.
34 *
35 * One of the few usable bits in the csr would be KN01_CSR_MONO.
36 * If that bit is set, the framebuffer is treated as a monochrome
37 * one.
38 */
39
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
43
44 #include "cpu.h"
45 #include "devices.h"
46 #include "memory.h"
47 #include "misc.h"
48
49 #include "dec_kn01.h"
50
51
52 struct kn01_csr_data {
53 int color_fb;
54 int csr;
55 };
56
57
58 struct vdac_data {
59 unsigned char vdac_reg[DEV_VDAC_LENGTH];
60
61 int color_fb_flag;
62
63 unsigned char cur_read_addr;
64 unsigned char cur_write_addr;
65
66 int sub_color; /* subcolor. 0, 1, or 2 */
67 unsigned char cur_rgb[3];
68
69 unsigned char *rgb_palette; /* ptr to 256 * 3 (r,g,b) */
70
71 unsigned char cur_read_addr_overlay;
72 unsigned char cur_write_addr_overlay;
73
74 int sub_color_overlay; /* subcolor: 0, 1, or 2 */
75 unsigned char cur_rgb_overlay[3];
76
77 unsigned char rgb_palette_overlay[16 * 3]; /* 16 * 3 (r,g,b) */
78 };
79
80
81 /*
82 * dev_kn01_csr_access():
83 */
84 int dev_kn01_csr_access(struct cpu *cpu, struct memory *mem,
85 uint64_t relative_addr, unsigned char *data, size_t len,
86 int writeflag, void *extra)
87 {
88 struct kn01_csr_data *k = extra;
89 int csr;
90
91 if (writeflag == MEM_WRITE) {
92 /* TODO */
93 return 1;
94 }
95
96 /* Read: */
97 if (len != 2 || relative_addr != 0) {
98 fatal("[ kn01_csr: trying to read something which is not "
99 "the first half-word of the csr ]");
100 }
101
102 csr = k->csr;
103
104 if (cpu->byte_order == EMUL_LITTLE_ENDIAN) {
105 data[0] = csr & 0xff;
106 data[1] = (csr >> 8) & 0xff;
107 } else {
108 data[1] = csr & 0xff;
109 data[0] = (csr >> 8) & 0xff;
110 }
111
112 return 1;
113 }
114
115
116 /*
117 * dev_vdac_access():
118 */
119 int dev_vdac_access(struct cpu *cpu, struct memory *mem,
120 uint64_t relative_addr, unsigned char *data, size_t len,
121 int writeflag, void *extra)
122 {
123 struct vdac_data *d = (struct vdac_data *) extra;
124
125 /* Read from/write to the vdac: */
126 switch (relative_addr) {
127 case DEV_VDAC_MAPWA:
128 if (writeflag == MEM_WRITE) {
129 d->cur_write_addr = data[0];
130 d->sub_color = 0;
131 } else {
132 debug("[ vdac: read from MAPWA ]\n");
133 data[0] = d->vdac_reg[relative_addr];
134 }
135 break;
136 case DEV_VDAC_MAP:
137 if (writeflag == MEM_WRITE) {
138 d->cur_rgb[d->sub_color] = data[0];
139 d->sub_color++;
140
141 if (d->sub_color > 2) {
142 /* (Only update for color, not mono mode) */
143 if (d->color_fb_flag)
144 memcpy(d->rgb_palette +
145 3*d->cur_write_addr, d->cur_rgb, 3);
146
147 d->sub_color = 0;
148 d->cur_write_addr ++;
149 }
150 } else {
151 if (d->sub_color == 0) {
152 memcpy(d->cur_rgb, d->rgb_palette +
153 3 * d->cur_read_addr, 3);
154 }
155 data[0] = d->cur_rgb[d->sub_color];
156 d->sub_color++;
157 if (d->sub_color > 2) {
158 d->sub_color = 0;
159 d->cur_read_addr ++;
160 }
161 }
162 break;
163 case DEV_VDAC_MAPRA:
164 if (writeflag == MEM_WRITE) {
165 d->cur_read_addr = data[0];
166 d->sub_color = 0;
167 } else {
168 debug("[ vdac: read from MAPRA ]\n");
169 data[0] = d->vdac_reg[relative_addr];
170 }
171 break;
172 case DEV_VDAC_OVERWA:
173 if (writeflag == MEM_WRITE) {
174 d->cur_write_addr_overlay = data[0];
175 d->sub_color_overlay = 0;
176 } else {
177 debug("[ vdac: read from OVERWA ]\n");
178 data[0] = d->vdac_reg[relative_addr];
179 }
180 break;
181 case DEV_VDAC_OVER:
182 if (writeflag == MEM_WRITE) {
183 d->cur_rgb_overlay[d->sub_color_overlay] = data[0];
184 d->sub_color_overlay++;
185
186 if (d->sub_color_overlay > 2) {
187 /* (Only update for color, not mono mode) */
188 if (d->color_fb_flag)
189 memcpy(d->rgb_palette_overlay +
190 3 * d->cur_write_addr_overlay,
191 d->cur_rgb_overlay, 3);
192
193 d->sub_color_overlay = 0;
194 d->cur_write_addr_overlay ++;
195 if (d->cur_write_addr_overlay > 15)
196 d->cur_write_addr_overlay = 0;
197 }
198 } else {
199 if (d->sub_color_overlay == 0) {
200 memcpy(d->cur_rgb_overlay,
201 d->rgb_palette_overlay +
202 3 * d->cur_read_addr_overlay, 3);
203 }
204 data[0] = d->cur_rgb_overlay[d->sub_color_overlay];
205 d->sub_color_overlay++;
206 if (d->sub_color_overlay > 2) {
207 d->sub_color_overlay = 0;
208 d->cur_read_addr_overlay ++;
209 if (d->cur_read_addr_overlay > 15)
210 d->cur_read_addr_overlay = 0;
211 }
212 }
213 break;
214 case DEV_VDAC_OVERRA:
215 if (writeflag == MEM_WRITE) {
216 d->cur_read_addr_overlay = data[0];
217 d->sub_color_overlay = 0;
218 } else {
219 debug("[ vdac: read from OVERRA ]\n");
220 data[0] = d->vdac_reg[relative_addr];
221 }
222 break;
223 default:
224 if (writeflag == MEM_WRITE) {
225 debug("[ vdac: unimplemented write to address 0x%x,"
226 " data=0x%02x ]\n", (int)relative_addr, data[0]);
227 d->vdac_reg[relative_addr] = data[0];
228 } else {
229 debug("[ vdac: unimplemented read from address 0x%x"
230 " ]\n", (int)relative_addr);
231 data[0] = d->vdac_reg[relative_addr];
232 }
233 }
234
235 /* Pretend it was ok: */
236 return 1;
237 }
238
239
240 /*
241 * dev_vdac_init():
242 */
243 void dev_vdac_init(struct memory *mem, uint64_t baseaddr,
244 unsigned char *rgb_palette, int color_fb_flag)
245 {
246 struct vdac_data *d = malloc(sizeof(struct vdac_data));
247 if (d == NULL) {
248 fprintf(stderr, "out of memory\n");
249 exit(1);
250 }
251 memset(d, 0, sizeof(struct vdac_data));
252 d->rgb_palette = rgb_palette;
253 d->color_fb_flag = color_fb_flag;
254
255 memory_device_register(mem, "vdac", baseaddr, DEV_VDAC_LENGTH,
256 dev_vdac_access, (void *)d, MEM_DEFAULT, NULL);
257 }
258
259
260 /*
261 * dev_kn01_csr_init():
262 */
263 void dev_kn01_csr_init(struct memory *mem, uint64_t baseaddr, int color_fb)
264 {
265 struct kn01_csr_data *k = malloc(sizeof(struct kn01_csr_data));
266 if (k == NULL) {
267 fprintf(stderr, "out of memory\n");
268 exit(1);
269 }
270
271 memset(k, 0, sizeof(struct kn01_csr_data));
272 k->color_fb = color_fb;
273
274 k->csr = 0;
275 k->csr |= (color_fb? 0 : KN01_CSR_MONO);
276
277 memory_device_register(mem, "kn01_csr", baseaddr,
278 DEV_KN01_CSR_LENGTH, dev_kn01_csr_access, k, MEM_DEFAULT, NULL);
279 }
280

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