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CommitLineData
c021880a
WD
1/*
2 * (C) Copyright 2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
1a459660 5 * SPDX-License-Identifier: GPL-2.0+
c021880a
WD
6 */
7
8#include <common.h>
c021880a 9#include <image.h>
5002d8cc 10#include <fdt_support.h>
c021880a 11#include <asm/addrspace.h>
fdff5b05 12#include <asm/io.h>
c021880a 13
d87080b7
WD
14DECLARE_GLOBAL_DATA_PTR;
15
c021880a
WD
16#define LINUX_MAX_ENVS 256
17#define LINUX_MAX_ARGS 256
18
e51a6b7a
DS
19static int linux_argc;
20static char **linux_argv;
59e8cbdb 21static char *linux_argp;
c021880a 22
e51a6b7a
DS
23static char **linux_env;
24static char *linux_env_p;
25static int linux_env_idx;
c021880a 26
f66cc1e3
DS
27static ulong arch_get_sp(void)
28{
29 ulong ret;
30
31 __asm__ __volatile__("move %0, $sp" : "=r"(ret) : );
32
33 return ret;
34}
35
36void arch_lmb_reserve(struct lmb *lmb)
37{
38 ulong sp;
39
40 sp = arch_get_sp();
41 debug("## Current stack ends at 0x%08lx\n", sp);
42
43 /* adjust sp by 4K to be safe */
44 sp -= 4096;
7a3e0f74 45 lmb_reserve(lmb, sp, gd->ram_top - sp);
f66cc1e3
DS
46}
47
59e8cbdb
DS
48static void linux_cmdline_init(void)
49{
50 linux_argc = 1;
51 linux_argv = (char **)UNCACHED_SDRAM(gd->bd->bi_boot_params);
52 linux_argv[0] = 0;
53 linux_argp = (char *)(linux_argv + LINUX_MAX_ARGS);
54}
55
56static void linux_cmdline_set(const char *value, size_t len)
57{
58 linux_argv[linux_argc] = linux_argp;
59 memcpy(linux_argp, value, len);
60 linux_argp[len] = 0;
61
62 linux_argp += len + 1;
63 linux_argc++;
64}
65
66static void linux_cmdline_dump(void)
67{
68 int i;
69
70 debug("## cmdline argv at 0x%p, argp at 0x%p\n",
71 linux_argv, linux_argp);
72
73 for (i = 1; i < linux_argc; i++)
74 debug(" arg %03d: %s\n", i, linux_argv[i]);
75}
76
25fc664f 77static void linux_cmdline_legacy(bootm_headers_t *images)
59e8cbdb
DS
78{
79 const char *bootargs, *next, *quote;
80
81 linux_cmdline_init();
82
00caae6d 83 bootargs = env_get("bootargs");
59e8cbdb
DS
84 if (!bootargs)
85 return;
86
87 next = bootargs;
88
89 while (bootargs && *bootargs && linux_argc < LINUX_MAX_ARGS) {
90 quote = strchr(bootargs, '"');
91 next = strchr(bootargs, ' ');
92
93 while (next && quote && quote < next) {
94 /*
95 * we found a left quote before the next blank
96 * now we have to find the matching right quote
97 */
98 next = strchr(quote + 1, '"');
99 if (next) {
100 quote = strchr(next + 1, '"');
101 next = strchr(next + 1, ' ');
102 }
103 }
104
105 if (!next)
106 next = bootargs + strlen(bootargs);
107
108 linux_cmdline_set(bootargs, next - bootargs);
109
110 if (*next)
111 next++;
112
113 bootargs = next;
114 }
25fc664f 115}
59e8cbdb 116
8cec725a
DS
117static void linux_cmdline_append(bootm_headers_t *images)
118{
119 char buf[24];
120 ulong mem, rd_start, rd_size;
121
122 /* append mem */
123 mem = gd->ram_size >> 20;
124 sprintf(buf, "mem=%luM", mem);
125 linux_cmdline_set(buf, strlen(buf));
126
127 /* append rd_start and rd_size */
128 rd_start = images->initrd_start;
129 rd_size = images->initrd_end - images->initrd_start;
130
131 if (rd_size) {
132 sprintf(buf, "rd_start=0x%08lX", rd_start);
133 linux_cmdline_set(buf, strlen(buf));
134 sprintf(buf, "rd_size=0x%lX", rd_size);
135 linux_cmdline_set(buf, strlen(buf));
136 }
137}
138
15f8aa90
DS
139static void linux_env_init(void)
140{
141 linux_env = (char **)(((ulong) linux_argp + 15) & ~15);
142 linux_env[0] = 0;
143 linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS);
144 linux_env_idx = 0;
145}
146
147static void linux_env_set(const char *env_name, const char *env_val)
148{
149 if (linux_env_idx < LINUX_MAX_ENVS - 1) {
150 linux_env[linux_env_idx] = linux_env_p;
151
152 strcpy(linux_env_p, env_name);
153 linux_env_p += strlen(env_name);
154
347ea94e 155 if (CONFIG_IS_ENABLED(MALTA)) {
b87493f4
DS
156 linux_env_p++;
157 linux_env[++linux_env_idx] = linux_env_p;
158 } else {
159 *linux_env_p++ = '=';
160 }
15f8aa90
DS
161
162 strcpy(linux_env_p, env_val);
163 linux_env_p += strlen(env_val);
164
165 linux_env_p++;
166 linux_env[++linux_env_idx] = 0;
167 }
168}
169
ca65e585 170static void linux_env_legacy(bootm_headers_t *images)
c021880a 171{
e51a6b7a 172 char env_buf[12];
15f8aa90 173 const char *cp;
6c154552 174 ulong rd_start, rd_size;
5da627a4 175
347ea94e
DS
176 if (CONFIG_IS_ENABLED(MEMSIZE_IN_BYTES)) {
177 sprintf(env_buf, "%lu", (ulong)gd->ram_size);
178 debug("## Giving linux memsize in bytes, %lu\n",
179 (ulong)gd->ram_size);
180 } else {
181 sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20));
182 debug("## Giving linux memsize in MB, %lu\n",
183 (ulong)(gd->ram_size >> 20));
184 }
c021880a 185
6c154552
DS
186 rd_start = UNCACHED_SDRAM(images->initrd_start);
187 rd_size = images->initrd_end - images->initrd_start;
188
15f8aa90
DS
189 linux_env_init();
190
e51a6b7a 191 linux_env_set("memsize", env_buf);
c021880a 192
6c154552 193 sprintf(env_buf, "0x%08lX", rd_start);
e51a6b7a 194 linux_env_set("initrd_start", env_buf);
c021880a 195
6c154552 196 sprintf(env_buf, "0x%lX", rd_size);
e51a6b7a 197 linux_env_set("initrd_size", env_buf);
c021880a 198
e51a6b7a
DS
199 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
200 linux_env_set("flash_start", env_buf);
c021880a 201
e51a6b7a
DS
202 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
203 linux_env_set("flash_size", env_buf);
c021880a 204
00caae6d 205 cp = env_get("ethaddr");
e51a6b7a 206 if (cp)
e7c37452 207 linux_env_set("ethaddr", cp);
e7c37452 208
00caae6d 209 cp = env_get("eth1addr");
e51a6b7a 210 if (cp)
e7c37452 211 linux_env_set("eth1addr", cp);
b87493f4 212
347ea94e 213 if (CONFIG_IS_ENABLED(MALTA)) {
d18d49d7
PB
214 sprintf(env_buf, "%un8r", gd->baudrate);
215 linux_env_set("modetty0", env_buf);
216 }
0ea7213f
GJ
217}
218
2bb5b638
DS
219static int boot_reloc_ramdisk(bootm_headers_t *images)
220{
221 ulong rd_len = images->rd_end - images->rd_start;
222
223 /*
224 * In case of legacy uImage's, relocation of ramdisk is already done
225 * by do_bootm_states() and should not repeated in 'bootm prep'.
226 */
227 if (images->state & BOOTM_STATE_RAMDISK) {
228 debug("## Ramdisk already relocated\n");
229 return 0;
230 }
231
232 return boot_ramdisk_high(&images->lmb, images->rd_start,
233 rd_len, &images->initrd_start, &images->initrd_end);
234}
235
236static int boot_reloc_fdt(bootm_headers_t *images)
237{
238 /*
239 * In case of legacy uImage's, relocation of FDT is already done
240 * by do_bootm_states() and should not repeated in 'bootm prep'.
241 */
242 if (images->state & BOOTM_STATE_FDT) {
243 debug("## FDT already relocated\n");
244 return 0;
245 }
246
247#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
248 boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
249 return boot_relocate_fdt(&images->lmb, &images->ft_addr,
250 &images->ft_len);
251#else
252 return 0;
253#endif
254}
255
4280342a 256#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
fdff5b05 257int arch_fixup_fdt(void *blob)
2bb5b638 258{
fdff5b05 259 u64 mem_start = virt_to_phys((void *)gd->bd->bi_memstart);
2bb5b638
DS
260 u64 mem_size = gd->ram_size;
261
262 return fdt_fixup_memory_banks(blob, &mem_start, &mem_size, 1);
2bb5b638 263}
4280342a 264#endif
2bb5b638
DS
265
266static int boot_setup_fdt(bootm_headers_t *images)
267{
268 return image_setup_libfdt(images, images->ft_addr, images->ft_len,
269 &images->lmb);
270}
271
ca65e585
DS
272static void boot_prep_linux(bootm_headers_t *images)
273{
2bb5b638 274 boot_reloc_ramdisk(images);
5002d8cc 275
2bb5b638
DS
276 if (CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && images->ft_len) {
277 boot_reloc_fdt(images);
5002d8cc 278 boot_setup_fdt(images);
2bb5b638 279 } else {
2bb5b638
DS
280 if (CONFIG_IS_ENABLED(MIPS_BOOT_CMDLINE_LEGACY)) {
281 linux_cmdline_legacy(images);
282
48bfc31b 283 if (!CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
2bb5b638
DS
284 linux_cmdline_append(images);
285
286 linux_cmdline_dump();
287 }
48bfc31b
ZLK
288
289 if (CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
290 linux_env_legacy(images);
2bb5b638 291 }
ca65e585
DS
292}
293
0ea7213f
GJ
294static void boot_jump_linux(bootm_headers_t *images)
295{
c4b37847
DS
296 typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong);
297 kernel_entry_t kernel = (kernel_entry_t) images->ep;
b87493f4 298 ulong linux_extra = 0;
0ea7213f 299
c4b37847 300 debug("## Transferring control to Linux (at address %p) ...\n", kernel);
0ea7213f
GJ
301
302 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
303
347ea94e 304 if (CONFIG_IS_ENABLED(MALTA))
b87493f4
DS
305 linux_extra = gd->ram_size;
306
347ea94e 307#if CONFIG_IS_ENABLED(BOOTSTAGE_FDT)
e13a50b3
DS
308 bootstage_fdt_add_report();
309#endif
347ea94e 310#if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
e13a50b3
DS
311 bootstage_report();
312#endif
0ea7213f 313
90b1c9fa
DS
314 if (images->ft_len)
315 kernel(-2, (ulong)images->ft_addr, 0, 0);
316 else
317 kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env,
318 linux_extra);
0ea7213f
GJ
319}
320
321int do_bootm_linux(int flag, int argc, char * const argv[],
322 bootm_headers_t *images)
323{
9c170e2e 324 /* No need for those on MIPS */
59e8cbdb 325 if (flag & BOOTM_STATE_OS_BD_T)
9c170e2e
GJ
326 return -1;
327
2bb5b638
DS
328 /*
329 * Cmdline init has been moved to 'bootm prep' because it has to be
330 * done after relocation of ramdisk to always pass correct values
331 * for rd_start and rd_size to Linux kernel.
332 */
333 if (flag & BOOTM_STATE_OS_CMDLINE)
59e8cbdb 334 return 0;
59e8cbdb 335
9c170e2e
GJ
336 if (flag & BOOTM_STATE_OS_PREP) {
337 boot_prep_linux(images);
338 return 0;
339 }
340
2bb5b638 341 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
9c170e2e
GJ
342 boot_jump_linux(images);
343 return 0;
344 }
e7c37452 345
cd7c596e 346 /* does not return */
40d7e99d 347 return 1;
c021880a 348}