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

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Revision 44 - (show annotations)
Mon Oct 8 16:22:56 2007 UTC (11 years, 11 months ago) by dpavlin
File MIME type: text/plain
File size: 4098 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1632 2007/09/11 21:46:35 debug Exp $
20070616	Implementing the MIPS32/64 revision 2 "ror" instruction.
20070617	Adding a struct for each physpage which keeps track of which
		ranges within that page (base offset, length) that are
		continuously translatable. When running with native code
		generation enabled (-b), a range is added after each read-
		ahead loop.
		Experimenting with using the physical program counter sample
		data (implemented 20070608) together with the "translatable
		range" information, to figure out which physical address ranges
		would be worth translating to native code (if the number of
		samples falling within a range is above a certain threshold).
20070618	Adding automagic building of .index comment files for
		src/file/, src/promemul/, src src/useremul/ as well.
		Adding a "has been translated" bit to the ranges, so that only
		not-yet-translated ranges will be sampled.
20070619	Moving src/cpu.c and src/memory_rw.c into src/cpus/,
		src/device.c into src/devices/, and src/machine.c into
		src/machines/.
		Creating a skeleton cc/ld native backend module; beginning on
		the function which will detect cc command line, etc.
20070620	Continuing on the native code generation infrastructure.
20070621	Moving src/x11.c and src/console.c into a new src/console/
		subdir (for everything that is console or framebuffer related).
		Moving src/symbol*.c into a new src/symbol/, which should
		contain anything that is symbol handling related.
20070624	Making the program counter sampling threshold a "settings
		variable" (sampling_threshold), i.e. it can now be changed
		during runtime.
		Switching the RELEASE notes format from plain text to HTML.
		If the TMPDIR environment variable is set, it is used instead
		of "/tmp" for temporary files.
		Continuing on the cc/ld backend: simple .c code is generated,
		the compiler and linker are called, etc.
		Adding detection of host architecture to the configure script
		(again), and adding icache invalidation support (only
		implemented for Alpha hosts so far).
20070625	Simplifying the program counter sampling mechanism.
20070626	Removing the cc/ld native code generation stuff, program
		counter sampling, etc; it would not have worked well in the
		general case.
20070627	Removing everything related to native code generation.
20070629	Removing the (practically unusable) support for multiple
		emulations. (The single emulation allowed now still supports
		multiple simultaneous machines, as before.)
		Beginning on PCCTWO and M88K interrupts.
20070723	Adding a dummy skeleton for emulation of M32R processors.
20070901	Fixing a warning found by "gcc version 4.3.0 20070817
		(experimental)" on amd64.
20070905	Removing some more traces of the old "multiple emulations"
		code.
		Also looking in /usr/local/include and /usr/local/lib for
		X11 libs, when running configure.
20070909	Minor updates to the guest OS install instructions, in
		preparation for the NetBSD 4.0 release.
20070918	More testing of NetBSD 4.0 RC1.

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_malta_lcd.c,v 1.12 2007/06/17 02:05:51 debug Exp $
29 *
30 * COMMENT: Malta (evbmips) LCD display
31 *
32 * TODO: Write output to somewhere else, not just as a debug message.
33 */
34
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include "cpu.h"
40 #include "device.h"
41 #include "emul.h"
42 #include "machine.h"
43 #include "memory.h"
44 #include "misc.h"
45
46 #include "maltareg.h"
47
48
49 #define DEV_MALTA_LCD_LENGTH 0x80
50 #define MALTA_LCD_TICK_SHIFT 16
51 #define LCD_LEN 8
52
53 struct malta_lcd_data {
54 uint64_t base_addr;
55
56 int display_modified;
57 unsigned char display[LCD_LEN];
58 };
59
60
61 DEVICE_TICK(malta_lcd)
62 {
63 struct malta_lcd_data *d = extra;
64 int i;
65
66 if (d->display_modified == 0)
67 return;
68 if (d->display_modified == 1) {
69 d->display_modified = 2;
70 return;
71 }
72
73 debug("[ malta_lcd: \"");
74 for (i=0; i<LCD_LEN; i++)
75 if (d->display[i] >= ' ')
76 debug("%c", d->display[i]);
77 else
78 debug("?");
79 debug("\" ]\n");
80
81 d->display_modified = 0;
82 }
83
84
85 DEVICE_ACCESS(malta_lcd)
86 {
87 struct malta_lcd_data *d = extra;
88 uint64_t idata = 0, odata = 0;
89 int pos;
90
91 if (writeflag == MEM_WRITE)
92 idata = memory_readmax64(cpu, data, len);
93
94 relative_addr += d->base_addr;
95
96 switch (relative_addr) {
97
98 case MALTA_ASCII_BASE + MALTA_ASCIIPOS0:
99 case MALTA_ASCII_BASE + MALTA_ASCIIPOS1:
100 case MALTA_ASCII_BASE + MALTA_ASCIIPOS2:
101 case MALTA_ASCII_BASE + MALTA_ASCIIPOS3:
102 case MALTA_ASCII_BASE + MALTA_ASCIIPOS4:
103 case MALTA_ASCII_BASE + MALTA_ASCIIPOS5:
104 case MALTA_ASCII_BASE + MALTA_ASCIIPOS6:
105 case MALTA_ASCII_BASE + MALTA_ASCIIPOS7:
106 pos = (relative_addr - MALTA_ASCII_BASE) / 8;
107 if (writeflag == MEM_WRITE) {
108 d->display[pos] = idata;
109 d->display_modified = 1;
110 } else {
111 odata = d->display[pos];
112 }
113 break;
114
115 default:
116 if (writeflag == MEM_WRITE) {
117 fatal("[ malta_lcd: unimplemented write to "
118 "offset 0x%x: data=0x%02x ]\n", (int)
119 relative_addr, (int)idata);
120 } else {
121 fatal("[ malta_lcd: unimplemented read from "
122 "offset 0x%x ]\n", (int)relative_addr);
123 }
124 }
125
126 if (writeflag == MEM_READ)
127 memory_writemax64(cpu, data, len, odata);
128
129 return 1;
130 }
131
132
133 DEVINIT(malta_lcd)
134 {
135 struct malta_lcd_data *d;
136
137 CHECK_ALLOCATION(d = malloc(sizeof(struct malta_lcd_data)));
138 memset(d, 0, sizeof(struct malta_lcd_data));
139
140 d->base_addr = devinit->addr;
141
142 memory_device_register(devinit->machine->memory, devinit->name,
143 devinit->addr, DEV_MALTA_LCD_LENGTH,
144 dev_malta_lcd_access, (void *)d, DM_DEFAULT, NULL);
145
146 machine_add_tickfunction(devinit->machine, dev_malta_lcd_tick,
147 d, MALTA_LCD_TICK_SHIFT);
148
149 return 1;
150 }
151

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