1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org>
5 * Copyright (c) 2012-2014 Robert N. M. Watson
6 * All rights reserved.
7 *
8 * This software was developed by SRI International and the University of
9 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
10 * ("CTSRD"), as part of the DARPA CRASH research programme.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #include "opt_ddb.h"
37 #include "opt_platform.h"
38
39 #include <sys/param.h>
40 #include <sys/conf.h>
41 #include <sys/kernel.h>
42 #include <sys/systm.h>
43 #include <sys/imgact.h>
44 #include <sys/bio.h>
45 #include <sys/buf.h>
46 #include <sys/bus.h>
47 #include <sys/cpu.h>
48 #include <sys/cons.h>
49 #include <sys/exec.h>
50 #include <sys/linker.h>
51 #include <sys/ucontext.h>
52 #include <sys/proc.h>
53 #include <sys/kdb.h>
54 #include <sys/ptrace.h>
55 #include <sys/reboot.h>
56 #include <sys/signalvar.h>
57 #include <sys/sysent.h>
58 #include <sys/sysproto.h>
59 #include <sys/user.h>
60
61 #ifdef FDT
62 #include <dev/fdt/fdt_common.h>
63 #include <dev/ofw/openfirm.h>
64 #include <dev/ofw/ofw_subr.h>
65 #endif
66
67 #include <vm/vm.h>
68 #include <vm/vm_object.h>
69 #include <vm/vm_page.h>
70
71 #include <machine/bootinfo.h>
72 #include <machine/clock.h>
73 #include <machine/cpu.h>
74 #include <machine/cpuregs.h>
75 #include <machine/hwfunc.h>
76 #include <machine/md_var.h>
77 #include <machine/metadata.h>
78 #include <machine/pmap.h>
79 #include <machine/trap.h>
80
81 extern int *edata;
82 extern int *end;
83
84 void
85 platform_cpu_init()
86 {
87 /* Nothing special */
88 }
89
90 static void
91 mips_init(void)
92 {
93 int i;
94 #ifdef FDT
95 struct mem_region mr[FDT_MEM_REGIONS];
96 uint64_t val;
97 int mr_cnt;
98 int j;
99 #endif
100
101 for (i = 0; i < 10; i++) {
102 phys_avail[i] = 0;
103 }
104
105 /* phys_avail regions are in bytes */
106 phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
107 phys_avail[1] = ctob(realmem);
108
109 dump_avail[0] = phys_avail[0];
110 dump_avail[1] = phys_avail[1];
111
112 physmem = realmem;
113
114 #ifdef FDT
115 if (fdt_get_mem_regions(mr, &mr_cnt, &val) == 0) {
116
117 physmem = btoc(val);
118
119 KASSERT((phys_avail[0] >= mr[0].mr_start) && \
120 (phys_avail[0] < (mr[0].mr_start + mr[0].mr_size)),
121 ("First region is not within FDT memory range"));
122
123 /* Limit size of the first region */
124 phys_avail[1] = (mr[0].mr_start + MIN(mr[0].mr_size, ctob(realmem)));
125 dump_avail[1] = phys_avail[1];
126
127 /* Add the rest of regions */
128 for (i = 1, j = 2; i < mr_cnt; i++, j+=2) {
129 phys_avail[j] = mr[i].mr_start;
130 phys_avail[j+1] = (mr[i].mr_start + mr[i].mr_size);
131 dump_avail[j] = phys_avail[j];
132 dump_avail[j+1] = phys_avail[j+1];
133 }
134 }
135 #endif
136
137 init_param1();
138 init_param2(physmem);
139 mips_cpu_init();
140 pmap_bootstrap();
141 mips_proc0_init();
142 mutex_init();
143 kdb_init();
144 #ifdef KDB
145 if (boothowto & RB_KDB)
146 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
147 #endif
148 }
149
150 /*
151 * Perform a board-level soft-reset.
152 */
153 void
154 platform_reset(void)
155 {
156
157 /* XXX SMP will likely require us to do more. */
158 __asm__ __volatile__(
159 "mfc0 $k0, $12\n\t"
160 "li $k1, 0x00100000\n\t"
161 "or $k0, $k0, $k1\n\t"
162 "mtc0 $k0, $12\n");
163 for( ; ; )
164 __asm__ __volatile("wait");
165 }
166
167 void
168 platform_start(__register_t a0, __register_t a1, __register_t a2,
169 __register_t a3)
170 {
171 struct bootinfo *bootinfop;
172 vm_offset_t kernend;
173 uint64_t platform_counter_freq;
174 int argc = a0;
175 char **argv = (char **)a1;
176 char **envp = (char **)a2;
177 long memsize;
178 #ifdef FDT
179 vm_offset_t dtbp;
180 void *kmdp;
181 #endif
182 int i;
183
184 /* clear the BSS and SBSS segments */
185 kernend = (vm_offset_t)&end;
186 memset(&edata, 0, kernend - (vm_offset_t)(&edata));
187
188 mips_postboot_fixup();
189
190 mips_pcpu0_init();
191
192 /*
193 * Over time, we've changed out boot-time binary interface for the
194 * kernel. Miniboot simply provides a 'memsize' in a3, whereas the
195 * FreeBSD boot loader provides a 'bootinfo *' in a3. While slightly
196 * grody, we support both here by detecting 'pointer-like' values in
197 * a3 and assuming physical memory can never be that back.
198 *
199 * XXXRW: Pull more values than memsize out of bootinfop -- e.g.,
200 * module information.
201 */
202 if (a3 >= 0x9800000000000000ULL) {
203 bootinfop = (void *)a3;
204 memsize = bootinfop->bi_memsize;
205 preload_metadata = (caddr_t)bootinfop->bi_modulep;
206 } else {
207 bootinfop = NULL;
208 memsize = a3;
209 }
210
211 #ifdef FDT
212 /*
213 * Find the dtb passed in by the boot loader (currently fictional).
214 */
215 kmdp = preload_search_by_type("elf kernel");
216 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
217
218 #if defined(FDT_DTB_STATIC)
219 /*
220 * In case the device tree blob was not retrieved (from metadata) try
221 * to use the statically embedded one.
222 */
223 if (dtbp == (vm_offset_t)NULL)
224 dtbp = (vm_offset_t)&fdt_static_dtb;
225 #else
226 #error "Non-static FDT not yet supported on BERI"
227 #endif
228
229 if (OF_install(OFW_FDT, 0) == FALSE)
230 while (1);
231 if (OF_init((void *)dtbp) != 0)
232 while (1);
233
234 /*
235 * Configure more boot-time parameters passed in by loader.
236 */
237 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
238 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
239
240 /*
241 * Get bootargs from FDT if specified.
242 */
243 ofw_parse_bootargs();
244 #endif
245
246 /*
247 * XXXRW: We have no way to compare wallclock time to cycle rate on
248 * BERI, so for now assume we run at the MALTA default (100MHz).
249 */
250 platform_counter_freq = MIPS_DEFAULT_HZ;
251 mips_timer_early_init(platform_counter_freq);
252
253 cninit();
254 printf("entry: platform_start()\n");
255
256 bootverbose = 1;
257 if (bootverbose) {
258 printf("cmd line: ");
259 for (i = 0; i < argc; i++)
260 printf("%s ", argv[i]);
261 printf("\n");
262
263 printf("envp:\n");
264 for (i = 0; envp[i]; i += 2)
265 printf("\t%s = %s\n", envp[i], envp[i+1]);
266
267 if (bootinfop != NULL)
268 printf("bootinfo found at %p\n", bootinfop);
269
270 printf("memsize = %p\n", (void *)memsize);
271 }
272
273 realmem = btoc(memsize);
274 mips_init();
275
276 mips_timer_init_params(platform_counter_freq, 0);
277 }
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