/[gxemul]/trunk/src/promemul/yamon.c
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Contents of /trunk/src/promemul/yamon.c

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Revision 44 - (show annotations)
Mon Oct 8 16:22:56 2007 UTC (16 years, 7 months ago) by dpavlin
File MIME type: text/plain
File size: 6679 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: yamon.c,v 1.14 2007/06/17 23:32:21 debug Exp $
29 *
30 * COMMENT: YAMON emulation
31 *
32 * (Very basic, only what is needed to get NetBSD booting.)
33 */
34
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <sys/types.h>
39
40 #include "console.h"
41 #include "cpu.h"
42 #include "cpu_mips.h"
43 #include "machine.h"
44 #include "memory.h"
45 #include "misc.h"
46 #include "net.h"
47
48 #include "yamon.h"
49
50
51 /*
52 * yamon_machine_setup():
53 */
54 void yamon_machine_setup(struct machine *machine, uint64_t env)
55 {
56 char tmps[200];
57 char macaddr[6];
58 uint64_t tmpptr = env + 0x400;
59 struct cpu *cpu = machine->cpus[0];
60
61 /*
62 * Standard YAMON environment variables:
63 *
64 * baseboardserial
65 * bootfile TODO
66 * bootprot TODO: Non-tftp boot
67 * bootserport
68 * bootserver
69 * cpuconfig TODO
70 * ethaddr
71 * fpu TODO
72 * gateway
73 * ipaddr TODO: Don't hardcode!
74 * memsize
75 * modetty0
76 * modetty1
77 * prompt
78 * start TODO
79 * startdelay TODO
80 * subnetmask TODO: Real subnet mask
81 * yamonrev
82 */
83
84 add_environment_string_dual(cpu, &env, &tmpptr,
85 "baseboardserial", "0000000000");
86
87 /* TODO: Disk boot! */
88 add_environment_string_dual(cpu, &env, &tmpptr, "bootprot", "tftp");
89
90 add_environment_string_dual(cpu, &env, &tmpptr, "bootserport", "tty0");
91
92 add_environment_string_dual(cpu, &env, &tmpptr,
93 "bootserver", "10.0.0.254");
94
95 net_generate_unique_mac(machine, (unsigned char *) macaddr);
96 snprintf(tmps, sizeof(tmps), "%02x.%02x.%02x.%02x.%02x.%02x",
97 macaddr[0], macaddr[1], macaddr[2],
98 macaddr[3], macaddr[4], macaddr[5]);
99 add_environment_string_dual(cpu, &env, &tmpptr, "ethaddr", tmps);
100
101 add_environment_string_dual(cpu, &env, &tmpptr,
102 "gateway", "10.0.0.254");
103
104 /* TODO: Don't hardcode! */
105 add_environment_string_dual(cpu, &env, &tmpptr,
106 "ipaddr", "10.0.0.1");
107
108 snprintf(tmps, sizeof(tmps), "0x%08x", machine->physical_ram_in_mb<<20);
109 add_environment_string_dual(cpu, &env, &tmpptr, "memsize", tmps);
110
111 add_environment_string_dual(cpu, &env, &tmpptr,
112 "modetty0", "38400,n,8,1,none");
113
114 add_environment_string_dual(cpu, &env, &tmpptr,
115 "modetty1", "38400,n,8,1,none");
116
117 add_environment_string_dual(cpu, &env, &tmpptr, "prompt", "YAMON");
118
119 add_environment_string_dual(cpu, &env, &tmpptr, "yamonrev", "02.06");
120
121 /* TODO: Real subnet mask: */
122 add_environment_string_dual(cpu, &env, &tmpptr,
123 "subnetmask", "255.0.0.0");
124
125
126 /* FreeBSD development specific: */
127 snprintf(tmps, sizeof(tmps), "%i", machine->emulated_hz / 1000);
128 add_environment_string_dual(cpu, &env, &tmpptr, "khz", tmps);
129
130 /* NULL terminate: */
131 tmpptr = 0;
132 add_environment_string_dual(cpu, &env, &tmpptr, NULL, NULL);
133 }
134
135
136 /*
137 * yamon_emul():
138 *
139 * YAMON emulation (for evbmips).
140 */
141 int yamon_emul(struct cpu *cpu)
142 {
143 uint32_t ofs = (cpu->pc & 0xff) + YAMON_FUNCTION_BASE;
144 uint8_t ch;
145 int n;
146 uint32_t oid;
147 uint64_t paddr, psize;
148
149 switch (ofs) {
150
151 case YAMON_PRINT_COUNT_OFS:
152 /*
153 * print count:
154 * a1 = string
155 * a2 = count
156 */
157 n = 0;
158 while (n < (int32_t)cpu->cd.mips.gpr[MIPS_GPR_A2]) {
159 cpu->memory_rw(cpu, cpu->mem, (int32_t)cpu->cd.mips.gpr
160 [MIPS_GPR_A1] + n, &ch, sizeof(ch), MEM_READ,
161 CACHE_DATA | NO_EXCEPTIONS);
162 console_putchar(cpu->machine->main_console_handle, ch);
163 n++;
164 }
165 break;
166
167 case YAMON_EXIT_OFS:
168 /*
169 * exit
170 */
171 debug("[ yamon_emul(): exit ]\n");
172 cpu->running = 0;
173 break;
174
175 /* YAMON_FLUSH_CACHE_OFS: TODO */
176 /* YAMON_PRINT_OFS: TODO */
177 /* YAMON_REG_CPU_ISR_OFS: TODO */
178 /* YAMON_DEREG_CPU_ISR_OFS: TODO */
179 /* YAMON_REG_IC_ISR_OFS: TODO */
180 /* YAMON_DEREG_IC_ISR_OFS: TODO */
181 /* YAMON_REG_ESR_OFS: TODO */
182 /* YAMON_DEREG_ESR_OFS: TODO */
183
184 case YAMON_GETCHAR_OFS:
185 n = console_readchar(cpu->machine->main_console_handle);
186 /* Note: -1 (if no char was available) becomes 0xff: */
187 ch = n;
188 cpu->memory_rw(cpu, cpu->mem, (int32_t)cpu->cd.mips.gpr[
189 MIPS_GPR_A1], &ch, sizeof(ch), MEM_WRITE,
190 CACHE_DATA | NO_EXCEPTIONS);
191 break;
192
193 case YAMON_SYSCON_READ_OFS:
194 /*
195 * syscon_read(oid [a0], addr [a1], size [a2])
196 */
197
198 oid = cpu->cd.mips.gpr[MIPS_GPR_A0];
199 paddr = cpu->cd.mips.gpr[MIPS_GPR_A1];
200 psize = cpu->cd.mips.gpr[MIPS_GPR_A2];
201
202 switch (oid) {
203 case SYSCON_BOARD_CPU_CLOCK_FREQ_ID:
204 if (psize == sizeof(uint32_t)) {
205 uint32_t freq = cpu->machine->emulated_hz;
206
207 debug("[ yamon_emul(): reporting CPU "
208 "frequency of %u ]\n", (unsigned int)
209 freq);
210
211 if (cpu->byte_order == EMUL_LITTLE_ENDIAN)
212 freq = LE32_TO_HOST(freq);
213 else
214 freq = BE32_TO_HOST(freq);
215
216 cpu->memory_rw(cpu, cpu->mem, (int32_t)paddr,
217 (void *) &freq, sizeof(freq), MEM_WRITE,
218 CACHE_DATA | NO_EXCEPTIONS);
219
220 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
221 } else {
222 cpu->cd.mips.gpr[MIPS_GPR_V0] = 1;
223 }
224 break;
225
226 default:
227 fatal("[ yamon_emul(): unimplemented object id 0x%"
228 PRIx32" ]\n", oid);
229 cpu->cd.mips.gpr[MIPS_GPR_V0] = 1;
230 }
231 break;
232
233 default:
234 cpu_register_dump(cpu->machine, cpu, 1, 0);
235 printf("\n");
236 fatal("[ yamon_emul(): unimplemented yamon function 0x%"
237 PRIx32" ]\n", ofs);
238 cpu->running = 0;
239 }
240
241 return 1;
242 }
243
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