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: stable/9/sys/mips/atheros/ar71xx_machdep.c 223562 2011-06-26 10:07:48Z kevlo $");
29
30 #include "opt_ddb.h"
31
32 #include <sys/param.h>
33 #include <sys/conf.h>
34 #include <sys/kernel.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37 #include <sys/cons.h>
38 #include <sys/kdb.h>
39 #include <sys/reboot.h>
40
41 #include <vm/vm.h>
42 #include <vm/vm_page.h>
43
44 #include <net/ethernet.h>
45
46 #include <machine/clock.h>
47 #include <machine/cpu.h>
48 #include <machine/cpuregs.h>
49 #include <machine/hwfunc.h>
50 #include <machine/md_var.h>
51 #include <machine/trap.h>
52 #include <machine/vmparam.h>
53
54 #include <mips/atheros/ar71xxreg.h>
55
56 #include <mips/atheros/ar71xx_setup.h>
57 #include <mips/atheros/ar71xx_cpudef.h>
58
59 #include <mips/sentry5/s5reg.h>
60
61 extern char edata[], end[];
62
63 uint32_t ar711_base_mac[ETHER_ADDR_LEN];
64 /* 4KB static data aread to keep a copy of the bootload env until
65 the dynamic kenv is setup */
66 char boot1_env[4096];
67
68 /*
69 * We get a string in from Redboot with the all the arguments together,
70 * "foo=bar bar=baz". Split them up and save in kenv.
71 */
72 static void
parse_argv(char * str)73 parse_argv(char *str)
74 {
75 char *n, *v;
76
77 while ((v = strsep(&str, " ")) != NULL) {
78 if (*v == '\0')
79 continue;
80 if (*v == '-') {
81 while (*v != '\0') {
82 v++;
83 switch (*v) {
84 case 'a': boothowto |= RB_ASKNAME; break;
85 case 'd': boothowto |= RB_KDB; break;
86 case 'g': boothowto |= RB_GDB; break;
87 case 's': boothowto |= RB_SINGLE; break;
88 case 'v': boothowto |= RB_VERBOSE; break;
89 }
90 }
91 } else {
92 n = strsep(&v, "=");
93 if (v == NULL)
94 setenv(n, "1");
95 else
96 setenv(n, v);
97 }
98 }
99 }
100
101 void
platform_cpu_init()102 platform_cpu_init()
103 {
104 /* Nothing special */
105 }
106
107 void
platform_halt(void)108 platform_halt(void)
109 {
110
111 }
112
113 void
platform_identify(void)114 platform_identify(void)
115 {
116
117 }
118
119 void
platform_reset(void)120 platform_reset(void)
121 {
122 ar71xx_device_stop(RST_RESET_FULL_CHIP);
123 /* Wait for reset */
124 while(1)
125 ;
126 }
127
128 void
platform_trap_enter(void)129 platform_trap_enter(void)
130 {
131
132 }
133
134 void
platform_trap_exit(void)135 platform_trap_exit(void)
136 {
137
138 }
139
140 /*
141 * Obtain the MAC address via the Redboot environment.
142 */
143 static void
ar71xx_redboot_get_macaddr(void)144 ar71xx_redboot_get_macaddr(void)
145 {
146 char *var;
147 int count = 0;
148
149 /*
150 * "ethaddr" is passed via envp on RedBoot platforms
151 * "kmac" is passed via argv on RouterBOOT platforms
152 */
153 if ((var = getenv("ethaddr")) != NULL ||
154 (var = getenv("kmac")) != NULL) {
155 count = sscanf(var, "%x%*c%x%*c%x%*c%x%*c%x%*c%x",
156 &ar711_base_mac[0], &ar711_base_mac[1],
157 &ar711_base_mac[2], &ar711_base_mac[3],
158 &ar711_base_mac[4], &ar711_base_mac[5]);
159 if (count < 6)
160 memset(ar711_base_mac, 0,
161 sizeof(ar711_base_mac));
162 freeenv(var);
163 }
164 }
165
166 void
platform_start(__register_t a0 __unused,__register_t a1 __unused,__register_t a2 __unused,__register_t a3 __unused)167 platform_start(__register_t a0 __unused, __register_t a1 __unused,
168 __register_t a2 __unused, __register_t a3 __unused)
169 {
170 uint64_t platform_counter_freq;
171 int argc, i;
172 char **argv, **envp;
173 vm_offset_t kernend;
174
175 /*
176 * clear the BSS and SBSS segments, this should be first call in
177 * the function
178 */
179 kernend = (vm_offset_t)&end;
180 memset(&edata, 0, kernend - (vm_offset_t)(&edata));
181
182 mips_postboot_fixup();
183
184 /* Initialize pcpu stuff */
185 mips_pcpu0_init();
186
187 argc = a0;
188 argv = (char**)a1;
189 envp = (char**)a2;
190 /*
191 * Protect ourselves from garbage in registers
192 */
193 if (MIPS_IS_VALID_PTR(envp)) {
194 for (i = 0; envp[i]; i += 2) {
195 if (strcmp(envp[i], "memsize") == 0)
196 realmem = btoc(strtoul(envp[i+1], NULL, 16));
197 }
198 }
199
200 /*
201 * Just wild guess. RedBoot let us down and didn't reported
202 * memory size
203 */
204 if (realmem == 0)
205 realmem = btoc(32*1024*1024);
206
207 /*
208 * Allow build-time override in case Redboot lies
209 * or in other situations (eg where there's u-boot)
210 * where there isn't (yet) a convienent method of
211 * being told how much RAM is available.
212 *
213 * This happens on at least the Ubiquiti LS-SR71A
214 * board, where redboot says there's 16mb of RAM
215 * but in fact there's 32mb.
216 */
217 #if defined(AR71XX_REALMEM)
218 realmem = btoc(AR71XX_REALMEM);
219 #endif
220
221 /* phys_avail regions are in bytes */
222 phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
223 phys_avail[1] = ctob(realmem);
224
225 dump_avail[0] = phys_avail[0];
226 dump_avail[1] = phys_avail[1] - phys_avail[0];
227
228 physmem = realmem;
229
230 /*
231 * ns8250 uart code uses DELAY so ticker should be inititalized
232 * before cninit. And tick_init_params refers to hz, so * init_param1
233 * should be called first.
234 */
235 init_param1();
236
237 /* Detect the system type - this is needed for subsequent chipset-specific calls */
238 ar71xx_detect_sys_type();
239 ar71xx_detect_sys_frequency();
240
241 platform_counter_freq = ar71xx_cpu_freq();
242 mips_timer_init_params(platform_counter_freq, 1);
243 cninit();
244 init_static_kenv(boot1_env, sizeof(boot1_env));
245
246 printf("CPU platform: %s\n", ar71xx_get_system_type());
247 printf("CPU Frequency=%d MHz\n", u_ar71xx_cpu_freq / 1000000);
248 printf("CPU DDR Frequency=%d MHz\n", u_ar71xx_ddr_freq / 1000000);
249 printf("CPU AHB Frequency=%d MHz\n", u_ar71xx_ahb_freq / 1000000);
250
251 printf("platform frequency: %lld\n", platform_counter_freq);
252 printf("arguments: \n");
253 printf(" a0 = %08x\n", a0);
254 printf(" a1 = %08x\n", a1);
255 printf(" a2 = %08x\n", a2);
256 printf(" a3 = %08x\n", a3);
257
258 printf("Cmd line:");
259 if (MIPS_IS_VALID_PTR(argv)) {
260 for (i = 0; i < argc; i++) {
261 printf(" %s", argv[i]);
262 parse_argv(argv[i]);
263 }
264 }
265 else
266 printf ("argv is invalid");
267 printf("\n");
268
269 printf("Environment:\n");
270 if (MIPS_IS_VALID_PTR(envp)) {
271 for (i = 0; envp[i]; i+=2) {
272 printf(" %s = %s\n", envp[i], envp[i+1]);
273 setenv(envp[i], envp[i+1]);
274 }
275 }
276 else
277 printf ("envp is invalid\n");
278
279 /* Redboot if_arge MAC address is in the environment */
280 ar71xx_redboot_get_macaddr();
281
282 init_param2(physmem);
283 mips_cpu_init();
284 pmap_bootstrap();
285 mips_proc0_init();
286 mutex_init();
287
288 /*
289 * Reset USB devices
290 */
291 ar71xx_init_usb_peripheral();
292
293 kdb_init();
294 #ifdef KDB
295 if (boothowto & RB_KDB)
296 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
297 #endif
298 }
299