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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
wdenkc0218802003-03-27 12:09:35 +00002/*
3 * (C) Copyright 2003
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
wdenkc0218802003-03-27 12:09:35 +00005 */
6
7#include <common.h>
wdenkc0218802003-03-27 12:09:35 +00008#include <image.h>
Daniel Schwierzeck5002d8c2015-01-14 21:44:13 +01009#include <fdt_support.h>
wdenkc0218802003-03-27 12:09:35 +000010#include <asm/addrspace.h>
Purna Chandra Mandalfdff5b02016-04-18 18:31:38 +053011#include <asm/io.h>
wdenkc0218802003-03-27 12:09:35 +000012
Wolfgang Denkd87080b2006-03-31 18:32:53 +020013DECLARE_GLOBAL_DATA_PTR;
14
wdenkc0218802003-03-27 12:09:35 +000015#define LINUX_MAX_ENVS 256
16#define LINUX_MAX_ARGS 256
17
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +020018static int linux_argc;
19static char **linux_argv;
Daniel Schwierzeck59e8cbd2013-05-09 17:10:06 +020020static char *linux_argp;
wdenkc0218802003-03-27 12:09:35 +000021
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +020022static char **linux_env;
23static char *linux_env_p;
24static int linux_env_idx;
wdenkc0218802003-03-27 12:09:35 +000025
Daniel Schwierzeckf66cc1e2013-05-09 17:10:06 +020026static 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 /* adjust sp by 4K to be safe */
43 sp -= 4096;
Paul Burton7a3e0f72016-09-26 19:28:56 +010044 lmb_reserve(lmb, sp, gd->ram_top - sp);
Daniel Schwierzeckf66cc1e2013-05-09 17:10:06 +020045}
46
Daniel Schwierzeck59e8cbd2013-05-09 17:10:06 +020047static 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
Daniel Schwierzeck25fc6642015-01-14 21:44:13 +010076static void linux_cmdline_legacy(bootm_headers_t *images)
Daniel Schwierzeck59e8cbd2013-05-09 17:10:06 +020077{
78 const char *bootargs, *next, *quote;
79
80 linux_cmdline_init();
81
Simon Glass00caae62017-08-03 12:22:12 -060082 bootargs = env_get("bootargs");
Daniel Schwierzeck59e8cbd2013-05-09 17:10:06 +020083 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 * we found a left quote before the next blank
95 * now we have to find the matching right quote
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 }
Daniel Schwierzeck25fc6642015-01-14 21:44:13 +0100114}
Daniel Schwierzeck59e8cbd2013-05-09 17:10:06 +0200115
Daniel Schwierzeck8cec7252015-01-14 21:44:13 +0100116static void linux_cmdline_append(bootm_headers_t *images)
117{
118 char buf[24];
119 ulong mem, rd_start, rd_size;
120
121 /* append mem */
122 mem = gd->ram_size >> 20;
123 sprintf(buf, "mem=%luM", mem);
124 linux_cmdline_set(buf, strlen(buf));
125
126 /* append rd_start and rd_size */
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
Daniel Schwierzeck15f8aa92013-05-09 17:10:06 +0200138static 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
Daniel Schwierzeck347ea942015-11-01 17:36:15 +0100154 if (CONFIG_IS_ENABLED(MALTA)) {
Daniel Schwierzeckb87493f2013-05-30 19:04:20 +0200155 linux_env_p++;
156 linux_env[++linux_env_idx] = linux_env_p;
157 } else {
158 *linux_env_p++ = '=';
159 }
Daniel Schwierzeck15f8aa92013-05-09 17:10:06 +0200160
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
Daniel Schwierzeckca65e582015-01-14 21:44:13 +0100169static void linux_env_legacy(bootm_headers_t *images)
wdenkc0218802003-03-27 12:09:35 +0000170{
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +0200171 char env_buf[12];
Daniel Schwierzeck15f8aa92013-05-09 17:10:06 +0200172 const char *cp;
Daniel Schwierzeck6c154552013-05-09 17:10:06 +0200173 ulong rd_start, rd_size;
wdenkc0218802003-03-27 12:09:35 +0000174
Daniel Schwierzeck347ea942015-11-01 17:36:15 +0100175 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 }
wdenkc0218802003-03-27 12:09:35 +0000184
Daniel Schwierzeck6c154552013-05-09 17:10:06 +0200185 rd_start = UNCACHED_SDRAM(images->initrd_start);
186 rd_size = images->initrd_end - images->initrd_start;
187
Daniel Schwierzeck15f8aa92013-05-09 17:10:06 +0200188 linux_env_init();
189
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +0200190 linux_env_set("memsize", env_buf);
wdenkc0218802003-03-27 12:09:35 +0000191
Daniel Schwierzeck6c154552013-05-09 17:10:06 +0200192 sprintf(env_buf, "0x%08lX", rd_start);
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +0200193 linux_env_set("initrd_start", env_buf);
wdenkc0218802003-03-27 12:09:35 +0000194
Daniel Schwierzeck6c154552013-05-09 17:10:06 +0200195 sprintf(env_buf, "0x%lX", rd_size);
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +0200196 linux_env_set("initrd_size", env_buf);
wdenkc0218802003-03-27 12:09:35 +0000197
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +0200198 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
199 linux_env_set("flash_start", env_buf);
wdenkc0218802003-03-27 12:09:35 +0000200
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +0200201 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
202 linux_env_set("flash_size", env_buf);
wdenkc0218802003-03-27 12:09:35 +0000203
Simon Glass00caae62017-08-03 12:22:12 -0600204 cp = env_get("ethaddr");
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +0200205 if (cp)
Jason McMullane7c37452008-06-08 23:56:00 -0400206 linux_env_set("ethaddr", cp);
Jason McMullane7c37452008-06-08 23:56:00 -0400207
Simon Glass00caae62017-08-03 12:22:12 -0600208 cp = env_get("eth1addr");
Daniel Schwierzecke51a6b72012-06-03 23:46:04 +0200209 if (cp)
Jason McMullane7c37452008-06-08 23:56:00 -0400210 linux_env_set("eth1addr", cp);
Daniel Schwierzeckb87493f2013-05-30 19:04:20 +0200211
Daniel Schwierzeck347ea942015-11-01 17:36:15 +0100212 if (CONFIG_IS_ENABLED(MALTA)) {
Paul Burtond18d49d2013-11-26 17:45:25 +0000213 sprintf(env_buf, "%un8r", gd->baudrate);
214 linux_env_set("modetty0", env_buf);
215 }
Gabor Juhos0ea72132013-01-07 02:53:41 +0000216}
Jason McMullane7c37452008-06-08 23:56:00 -0400217
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100218static int boot_reloc_fdt(bootm_headers_t *images)
219{
220 /*
221 * In case of legacy uImage's, relocation of FDT is already done
222 * by do_bootm_states() and should not repeated in 'bootm prep'.
223 */
224 if (images->state & BOOTM_STATE_FDT) {
225 debug("## FDT already relocated\n");
226 return 0;
227 }
228
229#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
230 boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
231 return boot_relocate_fdt(&images->lmb, &images->ft_addr,
232 &images->ft_len);
233#else
234 return 0;
235#endif
236}
237
Alexey Brodkin42803422018-01-24 20:47:09 +0300238#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
Purna Chandra Mandalfdff5b02016-04-18 18:31:38 +0530239int arch_fixup_fdt(void *blob)
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100240{
Purna Chandra Mandalfdff5b02016-04-18 18:31:38 +0530241 u64 mem_start = virt_to_phys((void *)gd->bd->bi_memstart);
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100242 u64 mem_size = gd->ram_size;
243
244 return fdt_fixup_memory_banks(blob, &mem_start, &mem_size, 1);
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100245}
Alexey Brodkin42803422018-01-24 20:47:09 +0300246#endif
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100247
248static int boot_setup_fdt(bootm_headers_t *images)
249{
Horatiu Vultur6943cc92019-04-24 17:21:29 +0200250 images->initrd_start = virt_to_phys((void *)images->initrd_start);
251 images->initrd_end = virt_to_phys((void *)images->initrd_end);
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100252 return image_setup_libfdt(images, images->ft_addr, images->ft_len,
253 &images->lmb);
254}
255
Daniel Schwierzeckca65e582015-01-14 21:44:13 +0100256static void boot_prep_linux(bootm_headers_t *images)
257{
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100258 if (CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && images->ft_len) {
259 boot_reloc_fdt(images);
Daniel Schwierzeck5002d8c2015-01-14 21:44:13 +0100260 boot_setup_fdt(images);
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100261 } else {
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100262 if (CONFIG_IS_ENABLED(MIPS_BOOT_CMDLINE_LEGACY)) {
263 linux_cmdline_legacy(images);
264
Zubair Lutfullah Kakakhel48bfc312017-07-11 16:47:51 +0100265 if (!CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100266 linux_cmdline_append(images);
267
268 linux_cmdline_dump();
269 }
Zubair Lutfullah Kakakhel48bfc312017-07-11 16:47:51 +0100270
271 if (CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
272 linux_env_legacy(images);
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100273 }
Daniel Schwierzeckca65e582015-01-14 21:44:13 +0100274}
275
Gabor Juhos0ea72132013-01-07 02:53:41 +0000276static void boot_jump_linux(bootm_headers_t *images)
277{
Daniel Schwierzeckc4b37842013-05-09 17:10:06 +0200278 typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong);
279 kernel_entry_t kernel = (kernel_entry_t) images->ep;
Daniel Schwierzeckb87493f2013-05-30 19:04:20 +0200280 ulong linux_extra = 0;
Gabor Juhos0ea72132013-01-07 02:53:41 +0000281
Daniel Schwierzeckc4b37842013-05-09 17:10:06 +0200282 debug("## Transferring control to Linux (at address %p) ...\n", kernel);
Gabor Juhos0ea72132013-01-07 02:53:41 +0000283
284 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
285
Daniel Schwierzeck347ea942015-11-01 17:36:15 +0100286 if (CONFIG_IS_ENABLED(MALTA))
Daniel Schwierzeckb87493f2013-05-30 19:04:20 +0200287 linux_extra = gd->ram_size;
288
Daniel Schwierzeck347ea942015-11-01 17:36:15 +0100289#if CONFIG_IS_ENABLED(BOOTSTAGE_FDT)
Daniel Schwierzecke13a50b2015-01-14 21:44:13 +0100290 bootstage_fdt_add_report();
291#endif
Daniel Schwierzeck347ea942015-11-01 17:36:15 +0100292#if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
Daniel Schwierzecke13a50b2015-01-14 21:44:13 +0100293 bootstage_report();
294#endif
Gabor Juhos0ea72132013-01-07 02:53:41 +0000295
Daniel Schwierzeck90b1c9f2015-02-22 16:58:30 +0100296 if (images->ft_len)
297 kernel(-2, (ulong)images->ft_addr, 0, 0);
298 else
299 kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env,
300 linux_extra);
Gabor Juhos0ea72132013-01-07 02:53:41 +0000301}
302
303int do_bootm_linux(int flag, int argc, char * const argv[],
304 bootm_headers_t *images)
305{
Gabor Juhos9c170e22013-01-07 02:53:42 +0000306 /* No need for those on MIPS */
Daniel Schwierzeck59e8cbd2013-05-09 17:10:06 +0200307 if (flag & BOOTM_STATE_OS_BD_T)
Gabor Juhos9c170e22013-01-07 02:53:42 +0000308 return -1;
309
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100310 /*
311 * Cmdline init has been moved to 'bootm prep' because it has to be
312 * done after relocation of ramdisk to always pass correct values
313 * for rd_start and rd_size to Linux kernel.
314 */
315 if (flag & BOOTM_STATE_OS_CMDLINE)
Daniel Schwierzeck59e8cbd2013-05-09 17:10:06 +0200316 return 0;
Daniel Schwierzeck59e8cbd2013-05-09 17:10:06 +0200317
Gabor Juhos9c170e22013-01-07 02:53:42 +0000318 if (flag & BOOTM_STATE_OS_PREP) {
319 boot_prep_linux(images);
320 return 0;
321 }
322
Daniel Schwierzeck2bb5b632015-11-01 17:36:14 +0100323 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
Gabor Juhos9c170e22013-01-07 02:53:42 +0000324 boot_jump_linux(images);
325 return 0;
326 }
Gabor Juhos0ea72132013-01-07 02:53:41 +0000327
Marian Balakowiczcd7c5962008-03-12 10:33:00 +0100328 /* does not return */
Kumar Gala40d7e992008-08-15 08:24:45 -0500329 return 1;
wdenkc0218802003-03-27 12:09:35 +0000330}