/[gxemul]/trunk/src/devices/dev_cons.c
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Contents of /trunk/src/devices/dev_cons.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: 4218 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_cons.c,v 1.24 2005/02/19 11:51:33 debug Exp $
29 *
30 * A console device. (Fake, only useful for simple tests.)
31 *
32 * This device provides memory mapped I/O for a simple console supporting
33 * putchar (writing to memory) and getchar (reading from memory), and
34 * support for halting the emulator. (This is useful for regression tests,
35 * Hello World-style test programs, and other simple experiments.)
36 */
37
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41
42 #include "console.h"
43 #include "cpu.h"
44 #include "devices.h"
45 #include "machine.h"
46 #include "memory.h"
47 #include "misc.h"
48
49
50 #define CONS_TICK_SHIFT 14
51
52 struct cons_data {
53 int console_handle;
54 int irq_nr;
55 };
56
57
58 /*
59 * dev_cons_tick():
60 */
61 void dev_cons_tick(struct cpu *cpu, void *extra)
62 {
63 struct cons_data *d = extra;
64
65 cpu_interrupt_ack(cpu, d->irq_nr);
66
67 if (console_charavail(d->console_handle))
68 cpu_interrupt(cpu, d->irq_nr);
69 }
70
71
72 /*
73 * dev_cons_access():
74 */
75 int dev_cons_access(struct cpu *cpu, struct memory *mem,
76 uint64_t relative_addr, unsigned char *data, size_t len,
77 int writeflag, void *extra)
78 {
79 struct cons_data *d = extra;
80 int i;
81
82 /* Exit the emulator: */
83 if (relative_addr == DEV_CONS_HALT) {
84 cpu->running = 0;
85 cpu->machine->exit_without_entering_debugger = 1;
86 return 1;
87 }
88
89 if (writeflag == MEM_WRITE) {
90 for (i=0; i<len; i++) {
91 if (data[i] != 0) {
92 if (cpu->machine->register_dump ||
93 cpu->machine->instruction_trace)
94 debug("putchar '");
95
96 console_putchar(d->console_handle, data[i]);
97
98 if (cpu->machine->register_dump ||
99 cpu->machine->instruction_trace)
100 debug("'\n");
101 fflush(stdout);
102 }
103 }
104 } else {
105 int ch = console_readchar(d->console_handle);
106 if (ch < 0)
107 ch = 0;
108 for (i=0; i<len; i++)
109 data[i] = ch;
110 }
111
112 dev_cons_tick(cpu, extra);
113
114 return 1;
115 }
116
117
118 /*
119 * dev_cons_init():
120 */
121 int dev_cons_init(struct machine *machine, struct memory *mem,
122 uint64_t baseaddr, char *name, int irq_nr)
123 {
124 struct cons_data *d;
125 char *name2;
126
127 d = malloc(sizeof(struct cons_data));
128 if (d == NULL) {
129 fprintf(stderr, "out of memory\n");
130 exit(1);
131 }
132 memset(d, 0, sizeof(struct cons_data));
133 d->irq_nr = irq_nr;
134 d->console_handle = console_start_slave(machine, name);
135
136 name2 = malloc(strlen(name) + 20);
137 if (name2 == NULL) {
138 fprintf(stderr, "out of memory in dev_cons_init()\n");
139 exit(1);
140 }
141 if (name != NULL && name[0])
142 sprintf(name2, "cons [%s]", name);
143 else
144 sprintf(name2, "cons");
145
146 memory_device_register(mem, name2, baseaddr, DEV_CONS_LENGTH,
147 dev_cons_access, d, MEM_DEFAULT, NULL);
148 machine_add_tickfunction(machine, dev_cons_tick, d, CONS_TICK_SHIFT);
149
150 return d->console_handle;
151 }
152

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