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

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Revision 10 - (show annotations)
Mon Oct 8 16:18:27 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 4390 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.815 2005/06/27 23:04:35 debug Exp $
20050617	Experimenting some more with netbooting OpenBSD/sgi. Adding
		a hack which allows emulated ethernet networks to be
		distributed across multiple emulator processes.
20050618	Minor updates (documentation, dummy YAMON emulation, etc).
20050620	strcpy/strcat -> strlcpy/strlcat updates.
		Some more progress on evbmips (Malta).
20050621	Adding a section to doc/configfiles.html about ethernet
		emulation across multiple hosts.
		Beginning the work on the ARM translation engine (using the
		dynamic-but-not-binary translation method).
		Fixing a bintrans bug: 0x9fc00000 should always be treated as
		PROM area, just as 0xbfc00000 is.
		Minor progress on Malta emulation (the PCI-ISA bus).
20050622	NetBSD/evbmips can now be installed (using another emulated
		machine) and run (including userland and so on). :-)
		Spliting up the bintrans haddr_entry field into two (one for
		read, one for write). Probably not much of a speed increase,
		though.
		Updating some NetBSD 2.0 -> 2.0.2 in the documentation.
20050623	Minor updates (documentation, the TODO file, etc).
		gzipped kernels are now always automagically gunzipped when
		loaded.
20050624	Adding a dummy Playstation Portable (PSP) mode, just barely
		enough to run Hello World (in weird colors :-).
		Removing the -b command line option; old bintrans is enabled
		by default instead. It makes more sense.
		Trying to finally fix the non-working performance measurement
		thing (instr/second etc).
20050625	Continuing on the essential basics for ARM emulation. Two
		instructions seem to work, a branch and a simple "mov". (The
		mov arguments are not correct yet.) Performance is definitely
		reasonable.
		Various other minor updates.
		Adding the ARM "bl" instruction.
		Adding support for combining multiple ARM instructions into one
		function call. ("mov" + "mov" is the only one implemented so
		far, but it seems to work.)
		Cleaning up some IP32 interrupt things (crime/mace); disabling
		the PS/2 keyboard controller on IP32, so that NetBSD/sgimips
		boots into userland again.
20050626	Finally! NetBSD/sgimips netboots. Adding instructions to
		doc/guestoses.html on how to set up an nfs server etc.
		Various other minor fixes.
		Playstation Portable ".pbp" files can now be used directly.
		(The ELF part of the .pbp is extracted transparently.)
		Converting some sprintf -> snprintf.
		Adding some more instructions to the ARM disassembler.
20050627	More ARM updates. Adding some simple ldr(b), str(b),
		cmps, and conditional branch instructions, enough to run
		a simple Hello World program.
		All ARM instructions are now inlined/generated for all possible
		condition codes.
		Adding add and sub, and more load/store instructions.
		Removing dummy files: cpu_alpha.c, cpu_hppa.c, and cpu_sparc.c.
		Some minor documentation updates; preparing for a 0.3.4
		release. Updating some URLs.

==============  RELEASE 0.3.4  ==============
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 1.26 2005/06/26 11:43:48 debug Exp $
29 *
30 * A console device. (Fake, only useful for simple tests.)
31 * It is hardwared to the lowest available MIPS hardware IRQ, and only
32 * interrupts CPU 0.
33 *
34 * This device provides memory mapped I/O for a simple console supporting
35 * putchar (writing to memory) and getchar (reading from memory), and
36 * support for halting the emulator. (This is useful for regression tests,
37 * Hello World-style test programs, and other simple experiments.)
38 */
39
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
43
44 #include "console.h"
45 #include "cpu.h"
46 #include "devices.h"
47 #include "machine.h"
48 #include "memory.h"
49 #include "misc.h"
50
51
52 #define CONS_TICK_SHIFT 14
53
54 struct cons_data {
55 int console_handle;
56 int irq_nr;
57 };
58
59
60 /*
61 * dev_cons_tick():
62 */
63 void dev_cons_tick(struct cpu *cpu, void *extra)
64 {
65 struct cpu *c = cpu->machine->cpus[0];
66 struct cons_data *d = extra;
67
68 cpu_interrupt_ack(c, d->irq_nr);
69
70 if (console_charavail(d->console_handle))
71 cpu_interrupt(c, d->irq_nr);
72 }
73
74
75 /*
76 * dev_cons_access():
77 */
78 int dev_cons_access(struct cpu *cpu, struct memory *mem,
79 uint64_t relative_addr, unsigned char *data, size_t len,
80 int writeflag, void *extra)
81 {
82 struct cons_data *d = extra;
83 int i;
84
85 /* Exit the emulator: */
86 if (relative_addr == DEV_CONS_HALT) {
87 cpu->running = 0;
88 cpu->machine->exit_without_entering_debugger = 1;
89 return 1;
90 }
91
92 if (writeflag == MEM_WRITE) {
93 for (i=0; i<len; i++) {
94 if (data[i] != 0) {
95 if (cpu->machine->register_dump ||
96 cpu->machine->instruction_trace)
97 debug("putchar '");
98
99 console_putchar(d->console_handle, data[i]);
100
101 if (cpu->machine->register_dump ||
102 cpu->machine->instruction_trace)
103 debug("'\n");
104 fflush(stdout);
105 }
106 }
107 } else {
108 int ch = console_readchar(d->console_handle);
109 if (ch < 0)
110 ch = 0;
111 for (i=0; i<len; i++)
112 data[i] = ch;
113 }
114
115 dev_cons_tick(cpu, extra);
116
117 return 1;
118 }
119
120
121 /*
122 * dev_cons_init():
123 */
124 int dev_cons_init(struct machine *machine, struct memory *mem,
125 uint64_t baseaddr, char *name, int irq_nr)
126 {
127 struct cons_data *d;
128 char *name2;
129 size_t nlen;
130
131 d = malloc(sizeof(struct cons_data));
132 if (d == NULL) {
133 fprintf(stderr, "out of memory\n");
134 exit(1);
135 }
136 memset(d, 0, sizeof(struct cons_data));
137 d->irq_nr = irq_nr;
138 d->console_handle = console_start_slave(machine, name);
139
140 nlen = strlen(name) + 20;
141 name2 = malloc(nlen);
142 if (name2 == NULL) {
143 fprintf(stderr, "out of memory in dev_cons_init()\n");
144 exit(1);
145 }
146 if (name != NULL && name[0])
147 snprintf(name2, nlen, "cons [%s]", name);
148 else
149 snprintf(name2, nlen, "cons");
150
151 memory_device_register(mem, name2, baseaddr, DEV_CONS_LENGTH,
152 dev_cons_access, d, MEM_DEFAULT, NULL);
153 machine_add_tickfunction(machine, dev_cons_tick, d, CONS_TICK_SHIFT);
154
155 return d->console_handle;
156 }
157
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