/[gxemul]/trunk/src/of.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /trunk/src/of.c

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Revision 4 - (show annotations)
Mon Oct 8 16:18:00 2007 UTC (12 years, 1 month ago) by dpavlin
File MIME type: text/plain
File size: 6884 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) 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: of.c,v 1.6 2005/04/19 00:02:00 debug Exp $
29 *
30 * OpenFirmware emulation.
31 */
32
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <sys/types.h>
37
38 #include "console.h"
39 #include "cpu.h"
40 #include "cpu_ppc.h"
41 #include "machine.h"
42 #include "memory.h"
43 #include "misc.h"
44
45
46 #define N_MAX_ARGS 10
47 #define ARG_MAX_LEN 4096
48
49 extern int quiet_mode;
50
51 /* TODO: IMPORTANT! Change this into something else, to allow multiple
52 opens of the same device: */
53 #define HANDLE_STDIN 0
54 #define HANDLE_STDOUT 1
55 #define HANDLE_STDERR 2
56 #define HANDLE_MMU 3
57 #define HANDLE_MEMORY 4
58 #define HANDLE_CHOSEN 5
59
60
61 /*
62 * readstr():
63 *
64 * Helper function to read a string from emulated memory.
65 */
66 static void readstr(struct cpu *cpu, uint64_t addr, char *strbuf,
67 int bufsize)
68 {
69 int i;
70 for (i=0; i<bufsize; i++) {
71 unsigned char ch;
72 cpu->memory_rw(cpu, cpu->mem, addr + i,
73 &ch, sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS);
74 strbuf[i] = '\0';
75 if (ch >= 1 && ch < 32)
76 ch = 0;
77 strbuf[i] = ch;
78 if (strbuf[i] == '\0')
79 break;
80 }
81
82 strbuf[bufsize - 1] = '\0';
83 }
84
85
86 /*
87 * of_emul():
88 *
89 * OpenFirmware call emulation.
90 */
91 int of_emul(struct cpu *cpu)
92 {
93 int i, nargs, nret, ofs, handle;
94 char service[50];
95 char arg[N_MAX_ARGS][ARG_MAX_LEN];
96 char tmpstr[ARG_MAX_LEN];
97 uint64_t base, ptr;
98 uint64_t buf, buflen;
99
100 /*
101 * r3 points to "prom_args":
102 *
103 * char *service; (probably 32 bit)
104 * int nargs;
105 * int nret;
106 * char *args[10];
107 */
108
109 base = cpu->cd.ppc.gpr[3];
110
111 /* TODO: how about 64-bit OpenFirmware? */
112 ptr = load_32bit_word(cpu, base);
113 nargs = load_32bit_word(cpu, base + 4);
114 nret = load_32bit_word(cpu, base + 8);
115
116 readstr(cpu, ptr, service, sizeof(service));
117
118 debug("[ of: %s(", service);
119 ofs = 12;
120 for (i=0; i<nargs; i++) {
121 if (i > 0)
122 debug(", ");
123 if (i >= N_MAX_ARGS) {
124 fatal("TOO MANY ARGS!");
125 continue;
126 }
127 ptr = load_32bit_word(cpu, base + ofs);
128 readstr(cpu, ptr, arg[i], ARG_MAX_LEN);
129 if (arg[i][0])
130 debug("\"%s\"", arg[i]);
131 else {
132 int x = ptr;
133 if (x > -256 && x < 256)
134 debug("%i", x);
135 else
136 debug("0x%x", x);
137 }
138 ofs += sizeof(uint32_t);
139 }
140 debug(") ]\n");
141
142 /* Return value: */
143 cpu->cd.ppc.gpr[3] = 0;
144
145 /* Note: base + ofs points to the first return slot. */
146
147 if (strcmp(service, "exit") == 0) {
148 cpu->running = 0;
149 } else if (strcmp(service, "finddevice") == 0) {
150 /* Return a handle in ret[0]: */
151 if (nret < 1) {
152 fatal("[ of: finddevice(\"%s\"): nret < 1! ]\n",
153 arg[0]);
154 } else if (strcmp(arg[0], "/memory") == 0) {
155 store_32bit_word(cpu, base + ofs, HANDLE_MEMORY);
156 } else if (strcmp(arg[0], "/chosen") == 0) {
157 store_32bit_word(cpu, base + ofs, HANDLE_CHOSEN);
158 } else {
159 /* Device not found. */
160 fatal("[ of: finddevice(\"%s\"): not yet"
161 " implemented ]\n", arg[0]);
162 cpu->cd.ppc.gpr[3] = -1;
163 }
164 } else if (strcmp(service, "getprop") == 0) {
165 handle = load_32bit_word(cpu, base + 12 + 4*0);
166 ptr = load_32bit_word(cpu, base + 12 + 4*1);
167 buf = load_32bit_word(cpu, base + 12 + 4*2);
168 buflen = load_32bit_word(cpu, base + 12 + 4*3);
169 readstr(cpu, ptr, tmpstr, sizeof(tmpstr));
170
171 /* TODO: rewrite this */
172 switch (handle) {
173 case HANDLE_MEMORY:
174 if (strcmp(tmpstr, "available") == 0) {
175 store_32bit_word(cpu, base + ofs, 2*8);
176 /* TODO. {start, size} */
177 store_32bit_word(cpu, buf, 0);
178 store_32bit_word(cpu, buf+4,
179 cpu->machine->physical_ram_in_mb * 1048576
180 - 65536);
181 store_32bit_word(cpu, buf+8, 0);
182 store_32bit_word(cpu, buf+12, 0);
183 } else if (strcmp(tmpstr, "reg") == 0) {
184 /* TODO */
185 store_32bit_word(cpu, base + ofs, 33*8);
186 store_32bit_word(cpu, buf, 0);
187 store_32bit_word(cpu, buf+4,
188 cpu->machine->physical_ram_in_mb * 1048576);
189 store_32bit_word(cpu, buf+8, 0);
190 store_32bit_word(cpu, buf+12, 0);
191 } else {
192 fatal("[ of: getprop(%i,\"%s\"): not yet"
193 " implemented ]\n", (int)handle, arg[1]);
194 cpu->cd.ppc.gpr[3] = -1;
195 }
196 break;
197 case HANDLE_CHOSEN:
198 if (strcmp(tmpstr, "stdin") == 0) {
199 if (buflen >= 4)
200 store_32bit_word(cpu, buf,
201 HANDLE_STDIN);
202 store_32bit_word(cpu, base + ofs, 4);
203 } else if (strcmp(tmpstr, "stdout") == 0) {
204 if (buflen >= 4)
205 store_32bit_word(cpu, buf,
206 HANDLE_STDOUT);
207 store_32bit_word(cpu, base + ofs, 4);
208 } else if (strcmp(tmpstr, "mmu") == 0) {
209 if (buflen >= 4)
210 store_32bit_word(cpu, buf,
211 HANDLE_MMU);
212 store_32bit_word(cpu, base + ofs, 4);
213 } else {
214 fatal("[ of: getprop(%i,\"%s\"): not yet"
215 " implemented ]\n", (int)handle, arg[1]);
216 cpu->cd.ppc.gpr[3] = -1;
217 }
218 break;
219 default:
220 fatal("[ of: getprop(%i,\"%s\"): not yet"
221 " implemented ]\n", (int)handle, arg[1]);
222 cpu->cd.ppc.gpr[3] = -1;
223 }
224 } else if (strcmp(service, "instance-to-package") == 0) {
225 /* TODO: a package handle */
226 store_32bit_word(cpu, base + ofs, 1000);
227 } else if (strcmp(service, "getproplen") == 0) {
228 /* TODO */
229 store_32bit_word(cpu, base + ofs, 0);
230 } else if (strcmp(service, "peer") == 0) {
231 /* TODO */
232 store_32bit_word(cpu, base + ofs, 0);
233 } else {
234 quiet_mode = 0;
235 cpu_register_dump(cpu->machine, cpu, 1, 0);
236 printf("\n");
237 fatal("[ of_emul(): unimplemented service \"%s\" ]\n", service);
238 cpu->running = 0;
239 cpu->dead = 1;
240 }
241
242 return 1;
243 }
244

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