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: releng/10.1/sys/mips/atheros/ar71xx_machdep.c 248865 2013-03-29 06:31:31Z adrian $");
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
60 #include <mips/sentry5/s5reg.h>
61
62 extern char edata[], end[];
63
64 uint32_t ar711_base_mac[ETHER_ADDR_LEN];
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
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 setenv(n, "1");
96 else
97 setenv(n, v);
98 }
99 }
100 }
101
102 void
103 platform_cpu_init()
104 {
105 /* Nothing special */
106 }
107
108 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 void
121 ar71xx_redboot_get_macaddr(void)
122 {
123 char *var;
124 int count = 0;
125
126 /*
127 * "ethaddr" is passed via envp on RedBoot platforms
128 * "kmac" is passed via argv on RouterBOOT platforms
129 */
130 if ((var = getenv("ethaddr")) != NULL ||
131 (var = getenv("kmac")) != NULL) {
132 count = sscanf(var, "%x%*c%x%*c%x%*c%x%*c%x%*c%x",
133 &ar711_base_mac[0], &ar711_base_mac[1],
134 &ar711_base_mac[2], &ar711_base_mac[3],
135 &ar711_base_mac[4], &ar711_base_mac[5]);
136 if (count < 6)
137 memset(ar711_base_mac, 0,
138 sizeof(ar711_base_mac));
139 freeenv(var);
140 }
141 }
142
143 void
144 platform_start(__register_t a0 __unused, __register_t a1 __unused,
145 __register_t a2 __unused, __register_t a3 __unused)
146 {
147 uint64_t platform_counter_freq;
148 int argc = 0, i;
149 char **argv = NULL, **envp = NULL;
150 vm_offset_t kernend;
151
152 /*
153 * clear the BSS and SBSS segments, this should be first call in
154 * the function
155 */
156 kernend = (vm_offset_t)&end;
157 memset(&edata, 0, kernend - (vm_offset_t)(&edata));
158
159 mips_postboot_fixup();
160
161 /* Initialize pcpu stuff */
162 mips_pcpu0_init();
163
164 /*
165 * Until some more sensible abstractions for uboot/redboot
166 * environment handling, we have to make this a compile-time
167 * hack. The existing code handles the uboot environment
168 * very incorrectly so we should just ignore initialising
169 * the relevant pointers.
170 */
171 #ifndef AR71XX_ENV_UBOOT
172 argc = a0;
173 argv = (char**)a1;
174 envp = (char**)a2;
175 #endif
176 /*
177 * Protect ourselves from garbage in registers
178 */
179 if (MIPS_IS_VALID_PTR(envp)) {
180 for (i = 0; envp[i]; i += 2) {
181 if (strcmp(envp[i], "memsize") == 0)
182 realmem = btoc(strtoul(envp[i+1], NULL, 16));
183 }
184 }
185
186 /*
187 * Just wild guess. RedBoot let us down and didn't reported
188 * memory size
189 */
190 if (realmem == 0)
191 realmem = btoc(32*1024*1024);
192
193 /*
194 * Allow build-time override in case Redboot lies
195 * or in other situations (eg where there's u-boot)
196 * where there isn't (yet) a convienent method of
197 * being told how much RAM is available.
198 *
199 * This happens on at least the Ubiquiti LS-SR71A
200 * board, where redboot says there's 16mb of RAM
201 * but in fact there's 32mb.
202 */
203 #if defined(AR71XX_REALMEM)
204 realmem = btoc(AR71XX_REALMEM);
205 #endif
206
207 /* phys_avail regions are in bytes */
208 phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
209 phys_avail[1] = ctob(realmem);
210
211 dump_avail[0] = phys_avail[0];
212 dump_avail[1] = phys_avail[1] - phys_avail[0];
213
214 physmem = realmem;
215
216 /*
217 * ns8250 uart code uses DELAY so ticker should be inititalized
218 * before cninit. And tick_init_params refers to hz, so * init_param1
219 * should be called first.
220 */
221 init_param1();
222
223 /* Detect the system type - this is needed for subsequent chipset-specific calls */
224 ar71xx_detect_sys_type();
225 ar71xx_detect_sys_frequency();
226
227 platform_counter_freq = ar71xx_cpu_freq();
228 mips_timer_init_params(platform_counter_freq, 1);
229 cninit();
230 init_static_kenv(boot1_env, sizeof(boot1_env));
231
232 printf("CPU platform: %s\n", ar71xx_get_system_type());
233 printf("CPU Frequency=%d MHz\n", u_ar71xx_cpu_freq / 1000000);
234 printf("CPU DDR Frequency=%d MHz\n", u_ar71xx_ddr_freq / 1000000);
235 printf("CPU AHB Frequency=%d MHz\n", u_ar71xx_ahb_freq / 1000000);
236 printf("platform frequency: %lld\n", platform_counter_freq);
237 printf("CPU reference clock: %d MHz\n", u_ar71xx_refclk / 1000000);
238 printf("arguments: \n");
239 printf(" a0 = %08x\n", a0);
240 printf(" a1 = %08x\n", a1);
241 printf(" a2 = %08x\n", a2);
242 printf(" a3 = %08x\n", a3);
243
244 /*
245 * XXX this code is very redboot specific.
246 */
247 printf("Cmd line:");
248 if (MIPS_IS_VALID_PTR(argv)) {
249 for (i = 0; i < argc; i++) {
250 printf(" %s", argv[i]);
251 parse_argv(argv[i]);
252 }
253 }
254 else
255 printf ("argv is invalid");
256 printf("\n");
257
258 printf("Environment:\n");
259 if (MIPS_IS_VALID_PTR(envp)) {
260 for (i = 0; envp[i]; i+=2) {
261 printf(" %s = %s\n", envp[i], envp[i+1]);
262 setenv(envp[i], envp[i+1]);
263 }
264 }
265 else
266 printf ("envp is invalid\n");
267
268 /* Redboot if_arge MAC address is in the environment */
269 ar71xx_redboot_get_macaddr();
270
271 init_param2(physmem);
272 mips_cpu_init();
273 pmap_bootstrap();
274 mips_proc0_init();
275 mutex_init();
276
277 /*
278 * Reset USB devices
279 */
280 ar71xx_init_usb_peripheral();
281
282 kdb_init();
283 #ifdef KDB
284 if (boothowto & RB_KDB)
285 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
286 #endif
287 }
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