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7#include <common.h>
8#include <image.h>
9#include <fdt_support.h>
10#include <asm/addrspace.h>
11#include <asm/io.h>
12
13DECLARE_GLOBAL_DATA_PTR;
14
15#define LINUX_MAX_ENVS 256
16#define LINUX_MAX_ARGS 256
17
18static int linux_argc;
19static char **linux_argv;
20static char *linux_argp;
21
22static char **linux_env;
23static char *linux_env_p;
24static int linux_env_idx;
25
26static ulong arch_get_sp(void)
27{
28 ulong ret;
29
30 __asm__ __volatile__("move %0, $sp" : "=r"(ret) : );
31
32 return ret;
33}
34
35void arch_lmb_reserve(struct lmb *lmb)
36{
37 ulong sp;
38
39 sp = arch_get_sp();
40 debug("## Current stack ends at 0x%08lx\n", sp);
41
42
43 sp -= 4096;
44 lmb_reserve(lmb, sp, gd->ram_top - sp);
45}
46
47static void linux_cmdline_init(void)
48{
49 linux_argc = 1;
50 linux_argv = (char **)UNCACHED_SDRAM(gd->bd->bi_boot_params);
51 linux_argv[0] = 0;
52 linux_argp = (char *)(linux_argv + LINUX_MAX_ARGS);
53}
54
55static void linux_cmdline_set(const char *value, size_t len)
56{
57 linux_argv[linux_argc] = linux_argp;
58 memcpy(linux_argp, value, len);
59 linux_argp[len] = 0;
60
61 linux_argp += len + 1;
62 linux_argc++;
63}
64
65static void linux_cmdline_dump(void)
66{
67 int i;
68
69 debug("## cmdline argv at 0x%p, argp at 0x%p\n",
70 linux_argv, linux_argp);
71
72 for (i = 1; i < linux_argc; i++)
73 debug(" arg %03d: %s\n", i, linux_argv[i]);
74}
75
76static void linux_cmdline_legacy(bootm_headers_t *images)
77{
78 const char *bootargs, *next, *quote;
79
80 linux_cmdline_init();
81
82 bootargs = env_get("bootargs");
83 if (!bootargs)
84 return;
85
86 next = bootargs;
87
88 while (bootargs && *bootargs && linux_argc < LINUX_MAX_ARGS) {
89 quote = strchr(bootargs, '"');
90 next = strchr(bootargs, ' ');
91
92 while (next && quote && quote < next) {
93
94
95
96
97 next = strchr(quote + 1, '"');
98 if (next) {
99 quote = strchr(next + 1, '"');
100 next = strchr(next + 1, ' ');
101 }
102 }
103
104 if (!next)
105 next = bootargs + strlen(bootargs);
106
107 linux_cmdline_set(bootargs, next - bootargs);
108
109 if (*next)
110 next++;
111
112 bootargs = next;
113 }
114}
115
116static void linux_cmdline_append(bootm_headers_t *images)
117{
118 char buf[24];
119 ulong mem, rd_start, rd_size;
120
121
122 mem = gd->ram_size >> 20;
123 sprintf(buf, "mem=%luM", mem);
124 linux_cmdline_set(buf, strlen(buf));
125
126
127 rd_start = images->initrd_start;
128 rd_size = images->initrd_end - images->initrd_start;
129
130 if (rd_size) {
131 sprintf(buf, "rd_start=0x%08lX", rd_start);
132 linux_cmdline_set(buf, strlen(buf));
133 sprintf(buf, "rd_size=0x%lX", rd_size);
134 linux_cmdline_set(buf, strlen(buf));
135 }
136}
137
138static void linux_env_init(void)
139{
140 linux_env = (char **)(((ulong) linux_argp + 15) & ~15);
141 linux_env[0] = 0;
142 linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS);
143 linux_env_idx = 0;
144}
145
146static void linux_env_set(const char *env_name, const char *env_val)
147{
148 if (linux_env_idx < LINUX_MAX_ENVS - 1) {
149 linux_env[linux_env_idx] = linux_env_p;
150
151 strcpy(linux_env_p, env_name);
152 linux_env_p += strlen(env_name);
153
154 if (CONFIG_IS_ENABLED(MALTA)) {
155 linux_env_p++;
156 linux_env[++linux_env_idx] = linux_env_p;
157 } else {
158 *linux_env_p++ = '=';
159 }
160
161 strcpy(linux_env_p, env_val);
162 linux_env_p += strlen(env_val);
163
164 linux_env_p++;
165 linux_env[++linux_env_idx] = 0;
166 }
167}
168
169static void linux_env_legacy(bootm_headers_t *images)
170{
171 char env_buf[12];
172 const char *cp;
173 ulong rd_start, rd_size;
174
175 if (CONFIG_IS_ENABLED(MEMSIZE_IN_BYTES)) {
176 sprintf(env_buf, "%lu", (ulong)gd->ram_size);
177 debug("## Giving linux memsize in bytes, %lu\n",
178 (ulong)gd->ram_size);
179 } else {
180 sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20));
181 debug("## Giving linux memsize in MB, %lu\n",
182 (ulong)(gd->ram_size >> 20));
183 }
184
185 rd_start = UNCACHED_SDRAM(images->initrd_start);
186 rd_size = images->initrd_end - images->initrd_start;
187
188 linux_env_init();
189
190 linux_env_set("memsize", env_buf);
191
192 sprintf(env_buf, "0x%08lX", rd_start);
193 linux_env_set("initrd_start", env_buf);
194
195 sprintf(env_buf, "0x%lX", rd_size);
196 linux_env_set("initrd_size", env_buf);
197
198 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
199 linux_env_set("flash_start", env_buf);
200
201 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
202 linux_env_set("flash_size", env_buf);
203
204 cp = env_get("ethaddr");
205 if (cp)
206 linux_env_set("ethaddr", cp);
207
208 cp = env_get("eth1addr");
209 if (cp)
210 linux_env_set("eth1addr", cp);
211
212 if (CONFIG_IS_ENABLED(MALTA)) {
213 sprintf(env_buf, "%un8r", gd->baudrate);
214 linux_env_set("modetty0", env_buf);
215 }
216}
217
218static int boot_reloc_ramdisk(bootm_headers_t *images)
219{
220 ulong rd_len = images->rd_end - images->rd_start;
221
222
223
224
225
226 if (images->state & BOOTM_STATE_RAMDISK) {
227 debug("## Ramdisk already relocated\n");
228 return 0;
229 }
230
231 return boot_ramdisk_high(&images->lmb, images->rd_start,
232 rd_len, &images->initrd_start, &images->initrd_end);
233}
234
235static int boot_reloc_fdt(bootm_headers_t *images)
236{
237
238
239
240
241 if (images->state & BOOTM_STATE_FDT) {
242 debug("## FDT already relocated\n");
243 return 0;
244 }
245
246#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
247 boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
248 return boot_relocate_fdt(&images->lmb, &images->ft_addr,
249 &images->ft_len);
250#else
251 return 0;
252#endif
253}
254
255#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
256int arch_fixup_fdt(void *blob)
257{
258 u64 mem_start = virt_to_phys((void *)gd->bd->bi_memstart);
259 u64 mem_size = gd->ram_size;
260
261 return fdt_fixup_memory_banks(blob, &mem_start, &mem_size, 1);
262}
263#endif
264
265static int boot_setup_fdt(bootm_headers_t *images)
266{
267 return image_setup_libfdt(images, images->ft_addr, images->ft_len,
268 &images->lmb);
269}
270
271static void boot_prep_linux(bootm_headers_t *images)
272{
273 boot_reloc_ramdisk(images);
274
275 if (CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && images->ft_len) {
276 boot_reloc_fdt(images);
277 boot_setup_fdt(images);
278 } else {
279 if (CONFIG_IS_ENABLED(MIPS_BOOT_CMDLINE_LEGACY)) {
280 linux_cmdline_legacy(images);
281
282 if (!CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
283 linux_cmdline_append(images);
284
285 linux_cmdline_dump();
286 }
287
288 if (CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
289 linux_env_legacy(images);
290 }
291}
292
293static void boot_jump_linux(bootm_headers_t *images)
294{
295 typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong);
296 kernel_entry_t kernel = (kernel_entry_t) images->ep;
297 ulong linux_extra = 0;
298
299 debug("## Transferring control to Linux (at address %p) ...\n", kernel);
300
301 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
302
303 if (CONFIG_IS_ENABLED(MALTA))
304 linux_extra = gd->ram_size;
305
306#if CONFIG_IS_ENABLED(BOOTSTAGE_FDT)
307 bootstage_fdt_add_report();
308#endif
309#if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
310 bootstage_report();
311#endif
312
313 if (images->ft_len)
314 kernel(-2, (ulong)images->ft_addr, 0, 0);
315 else
316 kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env,
317 linux_extra);
318}
319
320int do_bootm_linux(int flag, int argc, char * const argv[],
321 bootm_headers_t *images)
322{
323
324 if (flag & BOOTM_STATE_OS_BD_T)
325 return -1;
326
327
328
329
330
331
332 if (flag & BOOTM_STATE_OS_CMDLINE)
333 return 0;
334
335 if (flag & BOOTM_STATE_OS_PREP) {
336 boot_prep_linux(images);
337 return 0;
338 }
339
340 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
341 boot_jump_linux(images);
342 return 0;
343 }
344
345
346 return 1;
347}
348
