1 /*-
2 * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org>
3 * Copyright (c) 2012 Robert N. M. Watson
4 * All rights reserved.
5 *
6 * This software was developed by SRI International and the University of
7 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
8 * ("CTSRD"), as part of the DARPA CRASH research programme.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include "opt_ddb.h"
35 #include "opt_platform.h"
36
37 #include <sys/param.h>
38 #include <sys/conf.h>
39 #include <sys/kernel.h>
40 #include <sys/systm.h>
41 #include <sys/imgact.h>
42 #include <sys/bio.h>
43 #include <sys/buf.h>
44 #include <sys/bus.h>
45 #include <sys/cpu.h>
46 #include <sys/cons.h>
47 #include <sys/exec.h>
48 #include <sys/linker.h>
49 #include <sys/ucontext.h>
50 #include <sys/proc.h>
51 #include <sys/kdb.h>
52 #include <sys/ptrace.h>
53 #include <sys/reboot.h>
54 #include <sys/signalvar.h>
55 #include <sys/sysent.h>
56 #include <sys/sysproto.h>
57 #include <sys/user.h>
58
59 #ifdef FDT
60 #include <dev/fdt/fdt_common.h>
61 #include <dev/ofw/openfirm.h>
62 #endif
63
64 #include <vm/vm.h>
65 #include <vm/vm_object.h>
66 #include <vm/vm_page.h>
67
68 #include <machine/clock.h>
69 #include <machine/cpu.h>
70 #include <machine/cpuregs.h>
71 #include <machine/hwfunc.h>
72 #include <machine/md_var.h>
73 #include <machine/metadata.h>
74 #include <machine/pmap.h>
75 #include <machine/trap.h>
76
77 extern int *edata;
78 extern int *end;
79
80 void
81 platform_cpu_init()
82 {
83 /* Nothing special */
84 }
85
86 static void
87 mips_init(void)
88 {
89 int i;
90
91 for (i = 0; i < 10; i++) {
92 phys_avail[i] = 0;
93 }
94
95 /* phys_avail regions are in bytes */
96 phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
97 phys_avail[1] = ctob(realmem);
98
99 dump_avail[0] = phys_avail[0];
100 dump_avail[1] = phys_avail[1];
101
102 physmem = realmem;
103
104 init_param1();
105 init_param2(physmem);
106 mips_cpu_init();
107 pmap_bootstrap();
108 mips_proc0_init();
109 mutex_init();
110 kdb_init();
111 #ifdef KDB
112 if (boothowto & RB_KDB)
113 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
114 #endif
115 }
116
117 /*
118 * Perform a board-level soft-reset.
119 */
120 void
121 platform_reset(void)
122 {
123
124 /* XXX SMP will likely require us to do more. */
125 __asm__ __volatile__(
126 "mfc0 $k0, $12\n\t"
127 "li $k1, 0x00100000\n\t"
128 "or $k0, $k0, $k1\n\t"
129 "mtc0 $k0, $12\n");
130 for( ; ; )
131 __asm__ __volatile("wait");
132 }
133
134 #ifdef FDT
135 /* Parse cmd line args as env - copied from xlp_machdep. */
136 /* XXX-BZ this should really be centrally provided for all (boot) code. */
137 static void
138 _parse_bootargs(char *cmdline)
139 {
140 char *n, *v;
141
142 while ((v = strsep(&cmdline, " \n")) != NULL) {
143 if (*v == '\0')
144 continue;
145 if (*v == '-') {
146 while (*v != '\0') {
147 v++;
148 switch (*v) {
149 case 'a': boothowto |= RB_ASKNAME; break;
150 /* Someone should simulate that ;-) */
151 case 'C': boothowto |= RB_CDROM; break;
152 case 'd': boothowto |= RB_KDB; break;
153 case 'D': boothowto |= RB_MULTIPLE; break;
154 case 'm': boothowto |= RB_MUTE; break;
155 case 'g': boothowto |= RB_GDB; break;
156 case 'h': boothowto |= RB_SERIAL; break;
157 case 'p': boothowto |= RB_PAUSE; break;
158 case 'r': boothowto |= RB_DFLTROOT; break;
159 case 's': boothowto |= RB_SINGLE; break;
160 case 'v': boothowto |= RB_VERBOSE; break;
161 }
162 }
163 } else {
164 n = strsep(&v, "=");
165 if (v == NULL)
166 setenv(n, "1");
167 else
168 setenv(n, v);
169 }
170 }
171 }
172 #endif
173
174 void
175 platform_start(__register_t a0, __register_t a1, __register_t a2,
176 __register_t a3)
177 {
178 vm_offset_t kernend;
179 uint64_t platform_counter_freq;
180 int argc = a0;
181 char **argv = (char **)a1;
182 char **envp = (char **)a2;
183 unsigned int memsize = a3;
184 #ifdef FDT
185 char buf[2048]; /* early stack supposedly big enough */
186 vm_offset_t dtbp;
187 phandle_t chosen;
188 void *kmdp;
189 #endif
190 int i;
191
192 /* clear the BSS and SBSS segments */
193 kernend = (vm_offset_t)&end;
194 memset(&edata, 0, kernend - (vm_offset_t)(&edata));
195
196 mips_postboot_fixup();
197
198 mips_pcpu0_init();
199
200 #ifdef FDT
201 /*
202 * Find the dtb passed in by the boot loader (currently fictional).
203 */
204 kmdp = preload_search_by_type("elf kernel");
205 if (kmdp != NULL)
206 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
207 else
208 dtbp = (vm_offset_t)NULL;
209
210 #if defined(FDT_DTB_STATIC)
211 /*
212 * In case the device tree blob was not retrieved (from metadata) try
213 * to use the statically embedded one.
214 */
215 if (dtbp == (vm_offset_t)NULL)
216 dtbp = (vm_offset_t)&fdt_static_dtb;
217 #else
218 #error "Non-static FDT not yet supported on BERI"
219 #endif
220
221 if (OF_install(OFW_FDT, 0) == FALSE)
222 while (1);
223 if (OF_init((void *)dtbp) != 0)
224 while (1);
225
226 /*
227 * Get bootargs from FDT if specified.
228 */
229 chosen = OF_finddevice("/chosen");
230 if (OF_getprop(chosen, "bootargs", buf, sizeof(buf)) != -1)
231 _parse_bootargs(buf);
232 #endif
233
234 /*
235 * XXXRW: We have no way to compare wallclock time to cycle rate on
236 * BERI, so for now assume we run at the MALTA default (100MHz).
237 */
238 platform_counter_freq = MIPS_DEFAULT_HZ;
239 mips_timer_early_init(platform_counter_freq);
240
241 cninit();
242 printf("entry: platform_start()\n");
243
244 bootverbose = 1;
245 if (bootverbose) {
246 printf("cmd line: ");
247 for (i = 0; i < argc; i++)
248 printf("%s ", argv[i]);
249 printf("\n");
250
251 printf("envp:\n");
252 for (i = 0; envp[i]; i += 2)
253 printf("\t%s = %s\n", envp[i], envp[i+1]);
254
255 printf("memsize = %08x\n", memsize);
256 }
257
258 realmem = btoc(memsize);
259 mips_init();
260
261 mips_timer_init_params(platform_counter_freq, 0);
262 }
Cache object: 67516a01a4e7618c7d07b8e6e6237074
|