/[gxemul]/trunk/src/devices/dev_kn01.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Annotation of /trunk/src/devices/dev_kn01.c

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Revision 4 - (hide annotations)
Mon Oct 8 16:18:00 2007 UTC (16 years, 5 months ago) by dpavlin
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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 dpavlin 4 /*
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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