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

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Revision 20 - (show annotations)
Mon Oct 8 16:19:23 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 7384 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1055 2005/11/25 22:48:36 debug Exp $
20051031	Adding disassembly support for more ARM instructions (clz,
		smul* etc), and adding a hack to support "new tiny" pages
		for StrongARM.
20051101	Minor documentation updates (NetBSD 2.0.2 -> 2.1, and OpenBSD
		3.7 -> 3.8, and lots of testing).
		Changing from 1-sector PIO mode 0 transfers to 128-sector PIO
		mode 3 (in dev_wdc).
		Various minor ARM dyntrans updates (pc-relative loads from
		within the same page as the instruction are now treated as
		constant "mov").
20051102	Re-enabling instruction combinations (they were accidentally
		disabled).
		Dyntrans TLB entries are now overwritten using a round-robin
		scheme instead of randomly. This increases performance.
		Fixing a typo in file.c (thanks to Chuan-Hua Chang for
		noticing it).
		Experimenting with adding ATAPI support to dev_wdc (to make
		emulated *BSD detect cdroms as cdroms, not harddisks).
20051104	Various minor updates.
20051105	Continuing on the ATAPI emulation. Seems to work well enough
		for a NetBSD/cats installation, but not OpenBSD/cats.
		Various other updates.
20051106	Modifying the -Y command line option to allow scaleup with
		certain graphic controllers (only dev_vga so far), not just
		scaledown.
		Some minor dyntrans cleanups.
20051107	Beginning a cleanup up the PCI subsystem (removing the
		read_register hack, etc).
20051108	Continuing the cleanup; splitting up some pci devices into a
		normal autodev device and some separate pci glue code.
20051109	Continuing on the PCI bus stuff; all old pci_*.c have been
		incorporated into normal devices and/or rewritten as glue code
		only, adding a dummy Intel 82371AB PIIX4 for Malta (not really
		tested yet).
		Minor pckbc fix so that Linux doesn't complain.
		Working on the DEC 21143 NIC (ethernet mac rom stuff mostly).
		Various other minor fixes.
20051110	Some more ARM dyntrans fine-tuning (e.g. some instruction
		combinations (cmps followed by conditional branch within the
		same page) and special cases for DPIs with regform when the
		shifter isn't used).
20051111	ARM dyntrans updates: O(n)->O(1) for just-mark-as-non-
		writable in the generic pc_to_pointers function, and some other
		minor hacks.
		Merging Cobalt and evbmips (Malta) ISA interrupt handling,
		and some minor fixes to allow Linux to accept harddisk irqs.
20051112	Minor device updates (pckbc, dec21143, lpt, ...), most
		importantly fixing the ALI M1543/M5229 so that harddisk irqs
		work with Linux/CATS.
20051113	Some more generalizations of the PCI subsystem.
		Finally took the time to add a hack for SCSI CDROM TOCs; this
		enables OpenBSD to use partition 'a' (as needed by the OpenBSD
		installer), and Windows NT's installer to get a bit further.
		Also fixing dev_wdc to allow Linux to detect ATAPI CDROMs.
		Continuing on the DEC 21143.
20051114	Minor ARM dyntrans tweaks; ARM cmps+branch optimization when
		comparing with 0, and generalizing the xchg instr. comb.
		Adding disassembly of ARM mrrc/mcrr and q{,d}{add,sub}.
20051115	Continuing on various PPC things (BATs, other address trans-
		lation things, various loads/stores, BeBox emulation, etc.).
		Beginning to work on PPC interrupt/exception support.
20051116	Factoring out some code which initializes legacy ISA devices
		from those machines that use them (bus_isa).
		Continuing on PPC interrupt/exception support.
20051117	Minor Malta fixes: RTC year offset = 80, disabling a speed hack
		which caused NetBSD to detect a too fast cpu, and adding a new
		hack to make Linux detect a faster cpu.
		Continuing on the Artesyn PM/PPC emulation mode.
		Adding an Algor emulation skeleton (P4032 and P5064);
		implementing some of the basics.
		Continuing on PPC emulation in general; usage of unimplemented
		SPRs is now easier to track, continuing on memory/exception
		related issues, etc.
20051118	More work on PPC emulation (tgpr0..3, exception handling,
		memory stuff, syscalls, etc.).
20051119	Changing the ARM dyntrans code to mostly use cpu->pc, and not
		necessarily use arm reg 15. Seems to work.
		Various PPC updates; continuing on the PReP emulation mode.
20051120	Adding a workaround/hack to dev_mc146818 to allow NetBSD/prep
		to detect the clock.
20051121	More cleanup of the PCI bus (memory and I/O bases, etc).
		Continuing on various PPC things (decrementer and timebase,
		WDCs on obio (on PReP) use irq 13, not 14/15).
20051122	Continuing on the CPC700 controller (interrupts etc) for PMPPC,
		and on PPC stuff in general.
		Finally! After some bug fixes to the virtual to physical addr
		translation, NetBSD/{prep,pmppc} 2.1 reach userland and are
		stable enough to be interacted with.
		More PCI updates; reverse-endian device access for PowerPC etc.
20051123	Generalizing the IEEE floating point subsystem (moving it out
		from src/cpus/cpu_mips_coproc.c into a new src/float_emul.c).
		Input via slave xterms was sometimes not really working; fixing
		this for ns16550, and a warning message is now displayed if
		multiple non-xterm consoles are active.
		Adding some PPC floating point support, etc.
		Various interrupt related updates (dev_wdc, _ns16550, _8259,
		and the isa32 common code in machine.c).
		NetBSD/prep can now be installed! :-) (Well, with some manual
		commands necessary before running sysinst.) Updating the
		documentation and various other things to reflect this.
20051124	Various minor documentation updates.
		Continuing the work on the DEC 21143 NIC.
20051125	LOTS of work on the 21143. Both OpenBSD and NetBSD work fine
		with it now, except that OpenBSD sometimes gives a time-out
		warning.
		Minor documentation updates.

==============  RELEASE 0.3.7  ==============
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 1.7 2005/11/13 00:14:09 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, DM_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, DM_DEFAULT, NULL);
279 }
280
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