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7#include <common.h>
8#include <bootstage.h>
9#include <env.h>
10#include <image.h>
11#include <fdt_support.h>
12#include <lmb.h>
13#include <log.h>
14#include <asm/addrspace.h>
15#include <asm/global_data.h>
16#include <asm/io.h>
17
18DECLARE_GLOBAL_DATA_PTR;
19
20#define LINUX_MAX_ENVS 256
21#define LINUX_MAX_ARGS 256
22
23static int linux_argc;
24static char **linux_argv;
25static char *linux_argp;
26
27static char **linux_env;
28static char *linux_env_p;
29static int linux_env_idx;
30
31static ulong arch_get_sp(void)
32{
33 ulong ret;
34
35 __asm__ __volatile__("move %0, $sp" : "=r"(ret) : );
36
37 return ret;
38}
39
40void arch_lmb_reserve(struct lmb *lmb)
41{
42 ulong sp;
43
44 sp = arch_get_sp();
45 debug("## Current stack ends at 0x%08lx\n", sp);
46
47
48 sp -= 4096;
49 lmb_reserve(lmb, sp, gd->ram_top - sp);
50}
51
52static void linux_cmdline_init(void)
53{
54 linux_argc = 1;
55 linux_argv = (char **)CKSEG1ADDR(gd->bd->bi_boot_params);
56 linux_argv[0] = 0;
57 linux_argp = (char *)(linux_argv + LINUX_MAX_ARGS);
58}
59
60static void linux_cmdline_set(const char *value, size_t len)
61{
62 linux_argv[linux_argc] = linux_argp;
63 memcpy(linux_argp, value, len);
64 linux_argp[len] = 0;
65
66 linux_argp += len + 1;
67 linux_argc++;
68}
69
70static void linux_cmdline_dump(void)
71{
72 int i;
73
74 debug("## cmdline argv at 0x%p, argp at 0x%p\n",
75 linux_argv, linux_argp);
76
77 for (i = 1; i < linux_argc; i++)
78 debug(" arg %03d: %s\n", i, linux_argv[i]);
79}
80
81static void linux_cmdline_legacy(bootm_headers_t *images)
82{
83 const char *bootargs, *next, *quote;
84
85 linux_cmdline_init();
86
87 bootargs = env_get("bootargs");
88 if (!bootargs)
89 return;
90
91 next = bootargs;
92
93 while (bootargs && *bootargs && linux_argc < LINUX_MAX_ARGS) {
94 quote = strchr(bootargs, '"');
95 next = strchr(bootargs, ' ');
96
97 while (next && quote && quote < next) {
98
99
100
101
102 next = strchr(quote + 1, '"');
103 if (next) {
104 quote = strchr(next + 1, '"');
105 next = strchr(next + 1, ' ');
106 }
107 }
108
109 if (!next)
110 next = bootargs + strlen(bootargs);
111
112 linux_cmdline_set(bootargs, next - bootargs);
113
114 if (*next)
115 next++;
116
117 bootargs = next;
118 }
119}
120
121static void linux_cmdline_append(bootm_headers_t *images)
122{
123 char buf[24];
124 ulong mem, rd_start, rd_size;
125
126
127 mem = gd->ram_size >> 20;
128 sprintf(buf, "mem=%luM", mem);
129 linux_cmdline_set(buf, strlen(buf));
130
131
132 rd_start = images->initrd_start;
133 rd_size = images->initrd_end - images->initrd_start;
134
135 if (rd_size) {
136 sprintf(buf, "rd_start=0x%08lX", rd_start);
137 linux_cmdline_set(buf, strlen(buf));
138 sprintf(buf, "rd_size=0x%lX", rd_size);
139 linux_cmdline_set(buf, strlen(buf));
140 }
141}
142
143static void linux_env_init(void)
144{
145 linux_env = (char **)(((ulong) linux_argp + 15) & ~15);
146 linux_env[0] = 0;
147 linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS);
148 linux_env_idx = 0;
149}
150
151static void linux_env_set(const char *env_name, const char *env_val)
152{
153 if (linux_env_idx < LINUX_MAX_ENVS - 1) {
154 linux_env[linux_env_idx] = linux_env_p;
155
156 strcpy(linux_env_p, env_name);
157 linux_env_p += strlen(env_name);
158
159 if (CONFIG_IS_ENABLED(MALTA)) {
160 linux_env_p++;
161 linux_env[++linux_env_idx] = linux_env_p;
162 } else {
163 *linux_env_p++ = '=';
164 }
165
166 strcpy(linux_env_p, env_val);
167 linux_env_p += strlen(env_val);
168
169 linux_env_p++;
170 linux_env[++linux_env_idx] = 0;
171 }
172}
173
174static void linux_env_legacy(bootm_headers_t *images)
175{
176 char env_buf[12];
177 const char *cp;
178 ulong rd_start, rd_size;
179
180 if (CONFIG_IS_ENABLED(MEMSIZE_IN_BYTES)) {
181 sprintf(env_buf, "%lu", (ulong)gd->ram_size);
182 debug("## Giving linux memsize in bytes, %lu\n",
183 (ulong)gd->ram_size);
184 } else {
185 sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20));
186 debug("## Giving linux memsize in MB, %lu\n",
187 (ulong)(gd->ram_size >> 20));
188 }
189
190 rd_start = CKSEG1ADDR(images->initrd_start);
191 rd_size = images->initrd_end - images->initrd_start;
192
193 linux_env_init();
194
195 linux_env_set("memsize", env_buf);
196
197 sprintf(env_buf, "0x%08lX", rd_start);
198 linux_env_set("initrd_start", env_buf);
199
200 sprintf(env_buf, "0x%lX", rd_size);
201 linux_env_set("initrd_size", env_buf);
202
203 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
204 linux_env_set("flash_start", env_buf);
205
206 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
207 linux_env_set("flash_size", env_buf);
208
209 cp = env_get("ethaddr");
210 if (cp)
211 linux_env_set("ethaddr", cp);
212
213 cp = env_get("eth1addr");
214 if (cp)
215 linux_env_set("eth1addr", cp);
216
217 if (CONFIG_IS_ENABLED(MALTA)) {
218 sprintf(env_buf, "%un8r", gd->baudrate);
219 linux_env_set("modetty0", env_buf);
220 }
221}
222
223static int boot_reloc_fdt(bootm_headers_t *images)
224{
225
226
227
228
229 if (images->state & BOOTM_STATE_FDT) {
230 debug("## FDT already relocated\n");
231 return 0;
232 }
233
234#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
235 boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
236 return boot_relocate_fdt(&images->lmb, &images->ft_addr,
237 &images->ft_len);
238#else
239 return 0;
240#endif
241}
242
243#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
244int arch_fixup_fdt(void *blob)
245{
246 u64 mem_start = virt_to_phys((void *)gd->ram_base);
247 u64 mem_size = gd->ram_size;
248
249 return fdt_fixup_memory_banks(blob, &mem_start, &mem_size, 1);
250}
251#endif
252
253static int boot_setup_fdt(bootm_headers_t *images)
254{
255 images->initrd_start = virt_to_phys((void *)images->initrd_start);
256 images->initrd_end = virt_to_phys((void *)images->initrd_end);
257 return image_setup_libfdt(images, images->ft_addr, images->ft_len,
258 &images->lmb);
259}
260
261static void boot_prep_linux(bootm_headers_t *images)
262{
263 if (CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && images->ft_len) {
264 boot_reloc_fdt(images);
265 boot_setup_fdt(images);
266 } else {
267 if (CONFIG_IS_ENABLED(MIPS_BOOT_CMDLINE_LEGACY)) {
268 linux_cmdline_legacy(images);
269
270 if (!CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
271 linux_cmdline_append(images);
272
273 linux_cmdline_dump();
274 }
275
276 if (CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
277 linux_env_legacy(images);
278 }
279}
280
281static void boot_jump_linux(bootm_headers_t *images)
282{
283 typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong);
284 kernel_entry_t kernel = (kernel_entry_t) images->ep;
285 ulong linux_extra = 0;
286
287 debug("## Transferring control to Linux (at address %p) ...\n", kernel);
288
289 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
290
291 if (CONFIG_IS_ENABLED(MALTA))
292 linux_extra = gd->ram_size;
293
294#if CONFIG_IS_ENABLED(BOOTSTAGE_FDT)
295 bootstage_fdt_add_report();
296#endif
297#if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
298 bootstage_report();
299#endif
300
301 if (CONFIG_IS_ENABLED(RESTORE_EXCEPTION_VECTOR_BASE))
302 trap_restore();
303
304 if (images->ft_len)
305 kernel(-2, (ulong)images->ft_addr, 0, 0);
306 else
307 kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env,
308 linux_extra);
309}
310
311int do_bootm_linux(int flag, int argc, char *const argv[],
312 bootm_headers_t *images)
313{
314
315 if (flag & BOOTM_STATE_OS_BD_T)
316 return -1;
317
318
319
320
321
322
323 if (flag & BOOTM_STATE_OS_CMDLINE)
324 return 0;
325
326 if (flag & BOOTM_STATE_OS_PREP) {
327 boot_prep_linux(images);
328 return 0;
329 }
330
331 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
332 boot_jump_linux(images);
333 return 0;
334 }
335
336
337 return 1;
338}
339
