1 /*-
2 * Copyright (c) 2009 Oleksandr Tymoshenko
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include "opt_ddb.h"
31 #include "opt_ar71xx.h"
32
33 #include <sys/param.h>
34 #include <sys/conf.h>
35 #include <sys/kernel.h>
36 #include <sys/systm.h>
37 #include <sys/bus.h>
38 #include <sys/cons.h>
39 #include <sys/kdb.h>
40 #include <sys/reboot.h>
41
42 #include <vm/vm.h>
43 #include <vm/vm_page.h>
44
45 #include <net/ethernet.h>
46
47 #include <machine/clock.h>
48 #include <machine/cpu.h>
49 #include <machine/cpuregs.h>
50 #include <machine/hwfunc.h>
51 #include <machine/md_var.h>
52 #include <machine/trap.h>
53 #include <machine/vmparam.h>
54
55 #include <mips/atheros/ar71xxreg.h>
56
57 #include <mips/atheros/ar71xx_setup.h>
58 #include <mips/atheros/ar71xx_cpudef.h>
59 #include <mips/atheros/ar71xx_macaddr.h>
60
61 #include <mips/sentry5/s5reg.h>
62
63 extern char edata[], end[];
64
65 /* 4KB static data aread to keep a copy of the bootload env until
66 the dynamic kenv is setup */
67 char boot1_env[4096];
68
69 /*
70 * We get a string in from Redboot with the all the arguments together,
71 * "foo=bar bar=baz". Split them up and save in kenv.
72 */
73 static void
parse_argv(char * str)74 parse_argv(char *str)
75 {
76 char *n, *v;
77
78 while ((v = strsep(&str, " ")) != NULL) {
79 if (*v == '\0')
80 continue;
81 if (*v == '-') {
82 while (*v != '\0') {
83 v++;
84 switch (*v) {
85 case 'a': boothowto |= RB_ASKNAME; break;
86 case 'd': boothowto |= RB_KDB; break;
87 case 'g': boothowto |= RB_GDB; break;
88 case 's': boothowto |= RB_SINGLE; break;
89 case 'v': boothowto |= RB_VERBOSE; break;
90 }
91 }
92 } else {
93 n = strsep(&v, "=");
94 if (v == NULL)
95 kern_setenv(n, "1");
96 else
97 kern_setenv(n, v);
98 }
99 }
100 }
101
102 void
platform_cpu_init()103 platform_cpu_init()
104 {
105 /* Nothing special */
106 }
107
108 void
platform_reset(void)109 platform_reset(void)
110 {
111 ar71xx_device_stop(RST_RESET_FULL_CHIP);
112 /* Wait for reset */
113 while(1)
114 ;
115 }
116
117 /*
118 * Obtain the MAC address via the Redboot environment.
119 */
120 static int
ar71xx_redboot_get_macaddr(void)121 ar71xx_redboot_get_macaddr(void)
122 {
123 char *var;
124 int count = 0, i;
125 uint32_t macaddr[ETHER_ADDR_LEN];
126 uint8_t tmpmac[ETHER_ADDR_LEN];
127
128 /*
129 * "ethaddr" is passed via envp on RedBoot platforms
130 * "kmac" is passed via argv on RouterBOOT platforms
131 */
132 if ((var = kern_getenv("ethaddr")) != NULL ||
133 (var = kern_getenv("kmac")) != NULL) {
134 count = sscanf(var, "%x%*c%x%*c%x%*c%x%*c%x%*c%x",
135 &macaddr[0], &macaddr[1],
136 &macaddr[2], &macaddr[3],
137 &macaddr[4], &macaddr[5]);
138
139 if (count < 6) {
140 memset(macaddr, 0,
141 sizeof(macaddr));
142 } else {
143 for (i = 0; i < ETHER_ADDR_LEN; i++)
144 tmpmac[i] = macaddr[i] & 0xff;
145 (void) ar71xx_mac_addr_init(ar71xx_board_mac_addr,
146 tmpmac,
147 0, /* offset */
148 0); /* is_local */
149 }
150 freeenv(var);
151 return (0);
152 }
153 return (-1);
154 }
155
156 #ifdef AR71XX_ENV_ROUTERBOOT
157 /*
158 * RouterBoot gives us the board memory in a command line argument.
159 */
160 static int
ar71xx_routerboot_get_mem(int argc,char ** argv)161 ar71xx_routerboot_get_mem(int argc, char **argv)
162 {
163 int i, board_mem;
164
165 /*
166 * Protect ourselves from garbage in registers.
167 */
168 if (!MIPS_IS_VALID_PTR(argv))
169 return (0);
170
171 for (i = 0; i < argc; i++) {
172 if (argv[i] == NULL)
173 continue;
174 if (strncmp(argv[i], "mem=", 4) == 0) {
175 if (sscanf(argv[i] + 4, "%dM", &board_mem) == 1)
176 return (btoc(board_mem * 1024 * 1024));
177 }
178 }
179
180 return (0);
181 }
182 #endif
183
184 /*
185 * Handle initialising the MAC address from a specific EEPROM
186 * offset.
187 *
188 * This is done during (very) early boot.
189 *
190 * hint.ar71xx.0.eeprom_mac_addr=<address to read from>
191 * hint.ar71xx.0.eeprom_mac_isascii=<0|1>
192 */
193 static int
ar71xx_platform_read_eeprom_mac(void)194 ar71xx_platform_read_eeprom_mac(void)
195 {
196 long eeprom_mac_addr = 0;
197 const char *mac;
198 int i, readascii = 0;
199 uint8_t macaddr[ETHER_ADDR_LEN];
200
201 if (resource_long_value("ar71xx", 0, "eeprom_mac_addr",
202 &eeprom_mac_addr) != 0)
203 return (-1);
204
205 /* get a pointer to the EEPROM MAC address */
206
207 mac = (const char *) MIPS_PHYS_TO_KSEG1(eeprom_mac_addr);
208
209 /* Check if it's ASCII or not */
210 if (resource_int_value("ar71xx", 0, "eeprom_mac_isascii",
211 &readascii) == 0 && readascii == 1) {
212 printf("ar71xx: Overriding MAC from EEPROM (ascii)\n");
213 for (i = 0; i < 6; i++) {
214 macaddr[i] = strtol(&(mac[i*3]), NULL, 16);
215 }
216 } else {
217 printf("ar71xx: Overriding MAC from EEPROM\n");
218 for (i = 0; i < 6; i++) {
219 macaddr[i] = mac[i];
220 }
221 }
222
223 /* Set the default board MAC */
224 (void) ar71xx_mac_addr_init(ar71xx_board_mac_addr,
225 macaddr,
226 0, /* offset */
227 0); /* is_local */
228 printf("ar71xx: Board MAC: %6D\n", ar71xx_board_mac_addr, ":");
229 return (0);
230 }
231
232 /*
233 * Populate a kenv hint for the given device based on the given
234 * MAC address and offset.
235 *
236 * Returns 0 if ok, < 0 on error.
237 */
238 static int
ar71xx_platform_set_mac_hint(const char * dev,int unit,const uint8_t * macaddr,int offset,int islocal)239 ar71xx_platform_set_mac_hint(const char *dev, int unit,
240 const uint8_t *macaddr, int offset, int islocal)
241 {
242 char macstr[32];
243 uint8_t lclmac[ETHER_ADDR_LEN];
244 char devstr[32];
245
246 /* Initialise the MAC address, plus/minus the offset */
247 if (ar71xx_mac_addr_init(lclmac, macaddr, offset, islocal) != 0) {
248 return (-1);
249 }
250
251 /* Turn it into a string */
252 snprintf(macstr, 32, "%6D", lclmac, ":");
253 snprintf(devstr, 32, "hint.%s.%d.macaddr", dev, unit);
254
255 printf(" %s => %s\n", devstr, macstr);
256
257 /* Call setenv */
258 if (kern_setenv(devstr, macstr) != 0) {
259 printf("%s: failed to set hint (%s => %s)\n",
260 __func__,
261 devstr,
262 macstr);
263 return (-1);
264 }
265
266 return (0);
267 }
268
269 /*
270 * Iterate through the list of boot time hints that populate
271 * a device MAC address hint based on the "board" MAC address.
272 *
273 * ar71xx_mac_map.X.devid=<device id, eg ath>
274 * ar71xx_mac_map.X.unitid=<unit id, eg 0>
275 * ar71xx_mac_map.X.offset=<mac address value offset>
276 * ar71xx_mac_map.X.is_local=<1 or 0>
277 */
278 static int
ar71xx_platform_check_mac_hints(void)279 ar71xx_platform_check_mac_hints(void)
280 {
281 int i;
282 const char *devid;
283 int offset, is_local, unitid;
284
285 for (i = 0; i < 8; i++) {
286 if (resource_string_value("ar71xx_mac_map", i, "devid",
287 &devid) != 0)
288 break;
289 if (resource_int_value("ar71xx_mac_map", i, "unitid",
290 &unitid) != 0)
291 break;
292 if (resource_int_value("ar71xx_mac_map", i, "offset",
293 &offset) != 0)
294 break;
295 if (resource_int_value("ar71xx_mac_map", i, "is_local",
296 &is_local) != 0)
297 break;
298 printf("ar71xx: devid '%s.%d', MAC offset '%d'\n",
299 devid, unitid, offset);
300 (void) ar71xx_platform_set_mac_hint(devid, unitid,
301 ar71xx_board_mac_addr, offset, is_local);
302 }
303
304 return (0);
305 }
306
307 extern char cpu_model[];
308
309 void
platform_start(__register_t a0 __unused,__register_t a1 __unused,__register_t a2 __unused,__register_t a3 __unused)310 platform_start(__register_t a0 __unused, __register_t a1 __unused,
311 __register_t a2 __unused, __register_t a3 __unused)
312 {
313 uint64_t platform_counter_freq;
314 int argc = 0, i;
315 char **argv = NULL, **envp = NULL;
316 vm_offset_t kernend;
317
318 /*
319 * clear the BSS and SBSS segments, this should be first call in
320 * the function
321 */
322 kernend = (vm_offset_t)&end;
323 memset(&edata, 0, kernend - (vm_offset_t)(&edata));
324
325 mips_postboot_fixup();
326
327 /* Initialize pcpu stuff */
328 mips_pcpu0_init();
329
330 /*
331 * Until some more sensible abstractions for uboot/redboot
332 * environment handling, we have to make this a compile-time
333 * hack. The existing code handles the uboot environment
334 * very incorrectly so we should just ignore initialising
335 * the relevant pointers.
336 */
337 #ifndef AR71XX_ENV_UBOOT
338 argc = a0;
339 argv = (char**)a1;
340 envp = (char**)a2;
341 #endif
342 /*
343 * Protect ourselves from garbage in registers
344 */
345 if (MIPS_IS_VALID_PTR(envp)) {
346 for (i = 0; envp[i]; i += 2) {
347 if (strcmp(envp[i], "memsize") == 0)
348 realmem = btoc(strtoul(envp[i+1], NULL, 16));
349 else if (strcmp(envp[i], "bootverbose") == 0)
350 bootverbose = btoc(strtoul(envp[i+1], NULL, 10));
351 }
352 }
353 bootverbose = 1;
354
355 #ifdef AR71XX_ENV_ROUTERBOOT
356 /*
357 * RouterBoot informs the board memory as a command line argument.
358 */
359 if (realmem == 0)
360 realmem = ar71xx_routerboot_get_mem(argc, argv);
361 #endif
362
363 /*
364 * Just wild guess. RedBoot let us down and didn't reported
365 * memory size
366 */
367 if (realmem == 0)
368 realmem = btoc(32*1024*1024);
369
370 /*
371 * Allow build-time override in case Redboot lies
372 * or in other situations (eg where there's u-boot)
373 * where there isn't (yet) a convienent method of
374 * being told how much RAM is available.
375 *
376 * This happens on at least the Ubiquiti LS-SR71A
377 * board, where redboot says there's 16mb of RAM
378 * but in fact there's 32mb.
379 */
380 #if defined(AR71XX_REALMEM)
381 realmem = btoc(AR71XX_REALMEM);
382 #endif
383
384 /* phys_avail regions are in bytes */
385 phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
386 phys_avail[1] = ctob(realmem);
387
388 dump_avail[0] = phys_avail[0];
389 dump_avail[1] = phys_avail[1] - phys_avail[0];
390
391 physmem = realmem;
392
393 /*
394 * ns8250 uart code uses DELAY so ticker should be inititalized
395 * before cninit. And tick_init_params refers to hz, so * init_param1
396 * should be called first.
397 */
398 init_param1();
399
400 /* Detect the system type - this is needed for subsequent chipset-specific calls */
401 ar71xx_detect_sys_type();
402 ar71xx_detect_sys_frequency();
403
404 platform_counter_freq = ar71xx_cpu_freq();
405 mips_timer_init_params(platform_counter_freq, 1);
406 cninit();
407 init_static_kenv(boot1_env, sizeof(boot1_env));
408
409 printf("CPU platform: %s\n", ar71xx_get_system_type());
410 printf("CPU Frequency=%d MHz\n", u_ar71xx_cpu_freq / 1000000);
411 printf("CPU DDR Frequency=%d MHz\n", u_ar71xx_ddr_freq / 1000000);
412 printf("CPU AHB Frequency=%d MHz\n", u_ar71xx_ahb_freq / 1000000);
413 printf("platform frequency: %lld MHz\n", platform_counter_freq / 1000000);
414 printf("CPU reference clock: %d MHz\n", u_ar71xx_refclk / 1000000);
415 printf("CPU MDIO clock: %d MHz\n", u_ar71xx_mdio_freq / 1000000);
416 printf("arguments: \n");
417 printf(" a0 = %08x\n", a0);
418 printf(" a1 = %08x\n", a1);
419 printf(" a2 = %08x\n", a2);
420 printf(" a3 = %08x\n", a3);
421
422 strcpy(cpu_model, ar71xx_get_system_type());
423
424 /*
425 * XXX this code is very redboot specific.
426 */
427 printf("Cmd line:");
428 if (MIPS_IS_VALID_PTR(argv)) {
429 for (i = 0; i < argc; i++) {
430 printf(" %s", argv[i]);
431 parse_argv(argv[i]);
432 }
433 }
434 else
435 printf ("argv is invalid");
436 printf("\n");
437
438 printf("Environment:\n");
439 if (MIPS_IS_VALID_PTR(envp)) {
440 for (i = 0; envp[i]; i+=2) {
441 printf(" %s = %s\n", envp[i], envp[i+1]);
442 kern_setenv(envp[i], envp[i+1]);
443 }
444 }
445 else
446 printf ("envp is invalid\n");
447
448 /* Platform setup */
449 init_param2(physmem);
450 mips_cpu_init();
451 pmap_bootstrap();
452 mips_proc0_init();
453 mutex_init();
454
455 /*
456 * Reset USB devices
457 */
458 ar71xx_init_usb_peripheral();
459
460 /*
461 * Reset internal ethernet switch, if one exists
462 */
463 ar71xx_reset_ethernet_switch();
464
465 /*
466 * Initialise the gmac driver.
467 */
468 ar71xx_init_gmac();
469
470 /* Redboot if_arge MAC address is in the environment */
471 (void) ar71xx_redboot_get_macaddr();
472
473 /* Various other boards need things to come out of EEPROM */
474 (void) ar71xx_platform_read_eeprom_mac();
475
476 /* Initialise the MAC address hint map */
477 ar71xx_platform_check_mac_hints();
478
479 kdb_init();
480 #ifdef KDB
481 if (boothowto & RB_KDB)
482 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
483 #endif
484 }
485