1 /*-
2 * Copyright (C) 2015-2016 by Stanislav Galabov. All rights reserved.
3 * Copyright (C) 2010-2011 by Aleksandr Rybalko. All rights reserved.
4 * Copyright (C) 2007 by Oleksandr Tymoshenko. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
25 * THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include "opt_ddb.h"
33
34 #include <sys/param.h>
35 #include <sys/conf.h>
36 #include <sys/kernel.h>
37 #include <sys/systm.h>
38 #include <sys/imgact.h>
39 #include <sys/bio.h>
40 #include <sys/buf.h>
41 #include <sys/bus.h>
42 #include <sys/cpu.h>
43 #include <sys/cons.h>
44 #include <sys/exec.h>
45 #include <sys/ucontext.h>
46 #include <sys/proc.h>
47 #include <sys/kdb.h>
48 #include <sys/ptrace.h>
49 #include <sys/reboot.h>
50 #include <sys/signalvar.h>
51 #include <sys/sysent.h>
52 #include <sys/sysproto.h>
53 #include <sys/user.h>
54
55 #include <vm/vm.h>
56 #include <vm/vm_object.h>
57 #include <vm/vm_page.h>
58
59 #include <machine/cache.h>
60 #include <machine/clock.h>
61 #include <machine/cpu.h>
62 #include <machine/cpuinfo.h>
63 #include <machine/cpufunc.h>
64 #include <machine/cpuregs.h>
65 #include <machine/hwfunc.h>
66 #include <machine/intr_machdep.h>
67 #include <machine/locore.h>
68 #include <machine/md_var.h>
69 #include <machine/pte.h>
70 #include <machine/sigframe.h>
71 #include <machine/trap.h>
72 #include <machine/vmparam.h>
73
74 #include <mips/mediatek/mtk_sysctl.h>
75 #include <mips/mediatek/mtk_soc.h>
76
77 #include "opt_platform.h"
78 #include "opt_rt305x.h"
79
80 #include <dev/fdt/fdt_common.h>
81 #include <dev/ofw/openfirm.h>
82
83 extern int *edata;
84 extern int *end;
85 static char boot1_env[0x1000];
86
87 void
88 platform_cpu_init()
89 {
90 /* Nothing special */
91 }
92
93 static void
94 mips_init(void)
95 {
96 struct mem_region mr[FDT_MEM_REGIONS];
97 uint64_t val;
98 int i, j, mr_cnt;
99 char *memsize;
100
101 printf("entry: mips_init()\n");
102
103 bootverbose = 1;
104
105 for (i = 0; i < 10; i++)
106 phys_avail[i] = 0;
107
108 dump_avail[0] = phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
109
110 /*
111 * The most low memory MT7621 can have. Currently MT7621 is the chip
112 * that supports the most memory, so that seems reasonable.
113 */
114 realmem = btoc(448 * 1024 * 1024);
115
116 if (fdt_get_mem_regions(mr, &mr_cnt, &val) == 0) {
117 physmem = btoc(val);
118
119 printf("RAM size: %ldMB (from FDT)\n",
120 ctob(physmem) / (1024 * 1024));
121
122 KASSERT((phys_avail[0] >= mr[0].mr_start) && \
123 (phys_avail[0] < (mr[0].mr_start + mr[0].mr_size)),
124 ("First region is not within FDT memory range"));
125
126 /* Limit size of the first region */
127 phys_avail[1] = (mr[0].mr_start +
128 MIN(mr[0].mr_size, ctob(realmem)));
129 dump_avail[1] = phys_avail[1];
130
131 /* Add the rest of the regions */
132 for (i = 1, j = 2; i < mr_cnt; i++, j+=2) {
133 phys_avail[j] = mr[i].mr_start;
134 phys_avail[j+1] = (mr[i].mr_start + mr[i].mr_size);
135 dump_avail[j] = phys_avail[j];
136 dump_avail[j+1] = phys_avail[j+1];
137 }
138 } else {
139 if ((memsize = kern_getenv("memsize")) != NULL) {
140 physmem = btoc(strtol(memsize, NULL, 0) << 20);
141 printf("RAM size: %ldMB (from memsize)\n",
142 ctob(physmem) / (1024 * 1024));
143 } else { /* All else failed, assume 32MB */
144 physmem = btoc(32 * 1024 * 1024);
145 printf("RAM size: %ldMB (assumed)\n",
146 ctob(physmem) / (1024 * 1024));
147 }
148
149 if (ctob(physmem) < (448 * 1024 * 1024)) {
150 /*
151 * Anything up to 448MB is assumed to be directly
152 * mappable as low memory...
153 */
154 dump_avail[1] = phys_avail[1] = ctob(physmem);
155 } else if (mtk_soc_get_socid() == MTK_SOC_MT7621) {
156 /*
157 * On MT7621 the low memory is limited to 448MB, the
158 * rest is high memory, mapped at 0x20000000
159 */
160 phys_avail[1] = 448 * 1024 * 1024;
161 phys_avail[2] = 0x20000000;
162 phys_avail[3] = phys_avail[2] + ctob(physmem) -
163 phys_avail[1];
164 dump_avail[1] = phys_avail[1] - phys_avail[0];
165 dump_avail[2] = phys_avail[2];
166 dump_avail[3] = phys_avail[3] - phys_avail[2];
167 } else {
168 /*
169 * We have > 448MB RAM and we're not MT7621? Currently
170 * there is no such chip, so we'll just limit the RAM to
171 * 32MB and let the user know...
172 */
173 printf("Unknown chip, assuming 32MB RAM\n");
174 physmem = btoc(32 * 1024 * 1024);
175 dump_avail[1] = phys_avail[1] = ctob(physmem);
176 }
177 }
178
179 if (physmem < realmem)
180 realmem = physmem;
181
182 init_param1();
183 init_param2(physmem);
184 mips_cpu_init();
185 pmap_bootstrap();
186 mips_proc0_init();
187 mutex_init();
188 kdb_init();
189 #ifdef KDB
190 if (boothowto & RB_KDB)
191 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
192 #endif
193 }
194
195 static void
196 _parse_bootarg(char *v)
197 {
198 char *n;
199
200 if (*v == '-') {
201 while (*v != '\0') {
202 v++;
203 switch (*v) {
204 case 'a': boothowto |= RB_ASKNAME; break;
205 /* Someone should simulate that ;-) */
206 case 'C': boothowto |= RB_CDROM; break;
207 case 'd': boothowto |= RB_KDB; break;
208 case 'D': boothowto |= RB_MULTIPLE; break;
209 case 'm': boothowto |= RB_MUTE; break;
210 case 'g': boothowto |= RB_GDB; break;
211 case 'h': boothowto |= RB_SERIAL; break;
212 case 'p': boothowto |= RB_PAUSE; break;
213 case 'r': boothowto |= RB_DFLTROOT; break;
214 case 's': boothowto |= RB_SINGLE; break;
215 case 'v': boothowto |= RB_VERBOSE; break;
216 }
217 }
218 } else {
219 n = strsep(&v, "=");
220 if (v == NULL)
221 kern_setenv(n, "1");
222 else
223 kern_setenv(n, v);
224 }
225 }
226
227 /* Parse cmd line args as env - copied from xlp_machdep. */
228 /* XXX-BZ this should really be centrally provided for all (boot) code. */
229 static void
230 _parse_bootargs(char *cmdline)
231 {
232 char *v;
233
234 while ((v = strsep(&cmdline, " \n")) != NULL) {
235 if (*v == '\0')
236 continue;
237 _parse_bootarg(v);
238 }
239 }
240
241 void
242 platform_reset(void)
243 {
244
245 mtk_soc_reset();
246 }
247
248 void
249 platform_start(__register_t a0 __unused, __register_t a1 __unused,
250 __register_t a2 __unused, __register_t a3 __unused)
251 {
252 vm_offset_t kernend;
253 int argc = a0, i;//, res;
254 uint32_t timer_clk;
255 char **argv = (char **)MIPS_PHYS_TO_KSEG0(a1);
256 char **envp = (char **)MIPS_PHYS_TO_KSEG0(a2);
257 void *dtbp;
258 phandle_t chosen;
259 char buf[2048];
260
261 /* clear the BSS and SBSS segments */
262 kernend = (vm_offset_t)&end;
263 memset(&edata, 0, kernend - (vm_offset_t)(&edata));
264
265 mips_postboot_fixup();
266
267 /* Initialize pcpu stuff */
268 mips_pcpu0_init();
269
270 dtbp = &fdt_static_dtb;
271 if (OF_install(OFW_FDT, 0) == FALSE)
272 while (1);
273 if (OF_init((void *)dtbp) != 0)
274 while (1);
275
276 mtk_soc_try_early_detect();
277 if ((timer_clk = mtk_soc_get_timerclk()) == 0)
278 timer_clk = 1000000000; /* no such speed yet */
279
280 mips_timer_early_init(timer_clk);
281
282 /* initialize console so that we have printf */
283 boothowto |= (RB_SERIAL | RB_MULTIPLE); /* Use multiple consoles */
284 boothowto |= (RB_VERBOSE);
285 cninit();
286
287 init_static_kenv(boot1_env, sizeof(boot1_env));
288
289 /*
290 * Get bsdbootargs from FDT if specified.
291 */
292 chosen = OF_finddevice("/chosen");
293 if (OF_getprop(chosen, "bsdbootargs", buf, sizeof(buf)) != -1)
294 _parse_bootargs(buf);
295
296 printf("FDT DTB at: 0x%08x\n", (uint32_t)dtbp);
297
298 printf("CPU clock: %4dMHz\n", mtk_soc_get_cpuclk()/(1000*1000));
299 printf("Timer clock: %4dMHz\n", timer_clk/(1000*1000));
300 printf("UART clock: %4dMHz\n\n", mtk_soc_get_uartclk()/(1000*1000));
301
302 printf("U-Boot args (from %d args):\n", argc - 1);
303
304 if (argc == 1)
305 printf("\tNone\n");
306
307 for (i = 1; i < argc; i++) {
308 char *n = "argv ", *arg;
309
310 if (i > 99)
311 break;
312
313 if (argv[i])
314 {
315 arg = (char *)(intptr_t)MIPS_PHYS_TO_KSEG0(argv[i]);
316 printf("\targv[%d] = %s\n", i, arg);
317 sprintf(n, "argv%d", i);
318 kern_setenv(n, arg);
319 }
320 }
321
322 printf("Environment:\n");
323
324 for (i = 0; envp[i] && MIPS_IS_VALID_PTR(envp[i]); i++) {
325 char *n, *arg;
326
327 arg = (char *)(intptr_t)MIPS_PHYS_TO_KSEG0(envp[i]);
328 if (! MIPS_IS_VALID_PTR(arg))
329 continue;
330 printf("\t%s\n", arg);
331 n = strsep(&arg, "=");
332 if (arg == NULL)
333 kern_setenv(n, "1");
334 else
335 kern_setenv(n, arg);
336 }
337
338
339 mips_init();
340 mips_timer_init_params(timer_clk, 0);
341 }
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