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

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Revision 40 - (show annotations)
Mon Oct 8 16:22:11 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 4011 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1539 2007/05/01 04:03:51 debug Exp $
20070415	Landisk PCLOCK should be 33.33 MHz, not 50 MHz. (This makes
		the clock run at correct speed.)
		FINALLY found and fixed the bug which caused OpenBSD/landisk
		to randomly bug out: an &-sign was missing in the special case
		handling of FPSCR in the 'LDS.L @Rm+,FPSCR' instruction.
		Adding similar special case handling for 'LDC.L @Rm+,SR'
		(calling sh_update_sr() instead of just loading).
		Implementing the 'FCNVSD FPUL,DRn' and 'FCNVDS DRm,FPUL'
		SuperH instructions.
		The 'LDC Rm,SR' instruction now immediately breaks out of the
		dyntrans loop if an interrupt is to be triggered.
20070416	In memory_rw.c, if mapping a page as writable, make sure to
		invalidate code translations even if the data access was a
		read.
		Minor SuperH updates.
20070418	Removing the dummy M68K emulation mode.
		Minor SH update (turning unnecessary sts_mach_rn, sts_macl_rn,
		and sts_pr_rn instruction handlers into mov_rm_rn).
20070419	Beginning to add a skeleton for an M88K mode: Adding a hack to
		allow OpenBSD/m88k a.out binaries to be loaded, and disassembly
		of a few simple 88K instructions.
		Commenting out the 'LDC Rm,SR' fix from a few days ago, because
		it made Linux/dreamcast bug out.
		Adding a hack to dev_sh4.c (an extra translation cache
		invalidation), which allows OpenBSD/landisk to boot ok after
		an install. Upgrading the Landisk machine mode to stable,
		updating documentation, etc.
20070420	Experimenting with adding a PCI controller (pcic) to dev_sh4.
		Adding a dummy Realtek 8139C+ skeleton device (dev_rtl8139c).
		Implementing the first M88K instructions (br, or[.u] imm), and
		adding disassembly of some more instructions.
20070421	Continuing a little on dev_rtl8139c.
20070422	Implementing the 9346 EEPROM "read" command for dev_rtl8139c.
		Finally found and fixed an old bug in the log n symbol search
		(it sometimes missed symbols). Debug trace (-i, -t etc) should
		now show more symbols. :-)
20070423	Continuing a little on M88K disassembly.
20070428	Fixing a memset arg order bug in src/net/net.c (thanks to
		Nigel Horne for noticing the bug).
		Applying parts of a patch from Carl van Schaik to clear out
		bottom bits of MIPS addresses more correctly, when using large
		page sizes, and doing some other minor cleanup/refactoring.
		Fixing a couple of warnings given by gcc with the -W option (a
		few more warnings than just plain -Wall).
		Reducing SuperH dyntrans physical address space from 64-bit to
		32-bit (since SH5/SH64 isn't imlemented yet anyway).
		Adding address-to-symbol annotation to a few more instructions
		in the SuperH instruction trace output.
		Beginning regression testing for the next release.
		Reverting the value of SCIF_DELAYED_TX_VALUE from 1 to 2,
		because OpenBSD/landisk may otherwise hang randomly.
20070429	The ugly hack/workaround to get OpenBSD/landisk booting without
		crashing does NOT work anymore (with the April 21 snapshot
		of OpenBSD/landisk). Strangely enough, removing the hack
		completely causes OpenBSD/landisk to work (!).
		More regression testing (re-testing everything SuperH-related,
		and some other things).
		Cobalt interrupts were actually broken; fixing by commenting
		out the DEC21143s in the Cobalt machine.
20070430	More regression testing.
20070501	Updating the OpenBSD/landisk install instructions to use
		4.1 instead of the current snapshot.
		GAAAH! OpenBSD/landisk 4.1 _needs_ the ugly hack/workaround;
		reintroducing it again. (The 4.1 kernel is actually from
		2007-03-11.)
		Simplifying the NetBSD/evbarm install instructions a bit.
		More regression testing.

==============  RELEASE 0.4.5.1  ==============
1 /*
2 * Copyright (C) 2005-2007 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_lpt.c,v 1.11 2007/04/20 11:17:24 debug Exp $
29 *
30 * LPT (parallel printer) controller.
31 */
32
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36
37 #include "console.h"
38 #include "cpu.h"
39 #include "device.h"
40 #include "machine.h"
41 #include "memory.h"
42 #include "misc.h"
43
44 #include "lptreg.h"
45
46
47 /* #define debug fatal */
48
49 #define TICK_SHIFT 18
50 #define DEV_LPT_LENGTH 3
51
52 struct lpt_data {
53 int irqnr;
54 char *name;
55 int console_handle;
56
57 unsigned char data;
58 unsigned char control;
59 };
60
61
62 DEVICE_TICK(lpt)
63 {
64 /* struct lpt_data *d = extra; */
65
66 /* TODO */
67 }
68
69
70 DEVICE_ACCESS(lpt)
71 {
72 uint64_t idata = 0, odata=0;
73 struct lpt_data *d = extra;
74
75 if (writeflag == MEM_WRITE)
76 idata = memory_readmax64(cpu, data, len);
77
78 switch (relative_addr) {
79
80 case LPT_DATA:
81 if (writeflag == MEM_READ)
82 odata = d->data;
83 else
84 d->data = idata;
85 break;
86
87 case LPT_STATUS:
88 odata = LPS_NBSY | LPS_NACK | LPS_SELECT | LPS_NERR;
89 break;
90
91 case LPT_CONTROL:
92 if (writeflag == MEM_WRITE) {
93 if (idata != d->control) {
94 if (idata & LPC_STROBE) {
95 /* data strobe */
96 console_putchar(d->console_handle,
97 d->data);
98 }
99 }
100 d->control = idata;
101 }
102 break;
103 }
104
105 if (writeflag == MEM_READ)
106 memory_writemax64(cpu, data, len, odata);
107
108 return 1;
109 }
110
111
112 DEVINIT(lpt)
113 {
114 struct lpt_data *d = malloc(sizeof(struct lpt_data));
115 size_t nlen;
116 char *name;
117
118 if (d == NULL) {
119 fprintf(stderr, "out of memory\n");
120 exit(1);
121 }
122 memset(d, 0, sizeof(struct lpt_data));
123 d->irqnr = devinit->irq_nr;
124 d->name = devinit->name2 != NULL? devinit->name2 : "";
125 d->console_handle = console_start_slave(devinit->machine, devinit->name,
126 CONSOLE_OUTPUT_ONLY);
127
128 nlen = strlen(devinit->name) + 10;
129 if (devinit->name2 != NULL)
130 nlen += strlen(devinit->name2);
131 name = malloc(nlen);
132 if (name == NULL) {
133 fprintf(stderr, "out of memory\n");
134 exit(1);
135 }
136 if (devinit->name2 != NULL && devinit->name2[0])
137 snprintf(name, nlen, "%s [%s]", devinit->name, devinit->name2);
138 else
139 snprintf(name, nlen, "%s", devinit->name);
140
141 memory_device_register(devinit->machine->memory, name, devinit->addr,
142 DEV_LPT_LENGTH, dev_lpt_access, d, DM_DEFAULT, NULL);
143 machine_add_tickfunction(devinit->machine, dev_lpt_tick, d,
144 TICK_SHIFT, 0.0);
145
146 /*
147 * NOTE: Ugly cast into a pointer, because this is a convenient way
148 * to return the console handle to code in src/machine.c.
149 */
150 devinit->return_ptr = (void *)(size_t)d->console_handle;
151
152 return 1;
153 }
154
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