bootm.c 8.8 KB

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  1. /*
  2. * (C) Copyright 2008 Semihalf
  3. *
  4. * (C) Copyright 2000-2006
  5. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  6. *
  7. * See file CREDITS for list of people who contributed to this
  8. * project.
  9. *
  10. * This program is free software; you can redistribute it and/or
  11. * modify it under the terms of the GNU General Public License as
  12. * published by the Free Software Foundation; either version 2 of
  13. * the License, or (at your option) any later version.
  14. *
  15. * This program is distributed in the hope that it will be useful,
  16. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. * GNU General Public License for more details.
  19. *
  20. * You should have received a copy of the GNU General Public License
  21. * along with this program; if not, write to the Free Software
  22. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23. * MA 02111-1307 USA
  24. */
  25. #include <common.h>
  26. #include <watchdog.h>
  27. #include <command.h>
  28. #include <image.h>
  29. #include <malloc.h>
  30. #include <u-boot/zlib.h>
  31. #include <bzlib.h>
  32. #include <environment.h>
  33. #include <asm/byteorder.h>
  34. #if defined(CONFIG_OF_LIBFDT)
  35. #include <fdt.h>
  36. #include <libfdt.h>
  37. #include <fdt_support.h>
  38. #endif
  39. #ifdef CONFIG_SYS_INIT_RAM_LOCK
  40. #include <asm/cache.h>
  41. #endif
  42. DECLARE_GLOBAL_DATA_PTR;
  43. extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  44. extern ulong get_effective_memsize(void);
  45. static ulong get_sp (void);
  46. static void set_clocks_in_mhz (bd_t *kbd);
  47. #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
  48. #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
  49. #endif
  50. static void boot_jump_linux(bootm_headers_t *images)
  51. {
  52. void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
  53. ulong r7, ulong r8, ulong r9);
  54. #ifdef CONFIG_OF_LIBFDT
  55. char *of_flat_tree = images->ft_addr;
  56. #endif
  57. kernel = (void (*)(bd_t *, ulong, ulong, ulong,
  58. ulong, ulong, ulong))images->ep;
  59. debug ("## Transferring control to Linux (at address %08lx) ...\n",
  60. (ulong)kernel);
  61. show_boot_progress (15);
  62. #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
  63. unlock_ram_in_cache();
  64. #endif
  65. #if defined(CONFIG_OF_LIBFDT)
  66. if (of_flat_tree) { /* device tree; boot new style */
  67. /*
  68. * Linux Kernel Parameters (passing device tree):
  69. * r3: pointer to the fdt
  70. * r4: 0
  71. * r5: 0
  72. * r6: epapr magic
  73. * r7: size of IMA in bytes
  74. * r8: 0
  75. * r9: 0
  76. */
  77. #if defined(CONFIG_85xx) || defined(CONFIG_440)
  78. #define EPAPR_MAGIC (0x45504150)
  79. #else
  80. #define EPAPR_MAGIC (0x65504150)
  81. #endif
  82. debug (" Booting using OF flat tree...\n");
  83. WATCHDOG_RESET ();
  84. (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
  85. CONFIG_SYS_BOOTMAPSZ, 0, 0);
  86. /* does not return */
  87. } else
  88. #endif
  89. {
  90. /*
  91. * Linux Kernel Parameters (passing board info data):
  92. * r3: ptr to board info data
  93. * r4: initrd_start or 0 if no initrd
  94. * r5: initrd_end - unused if r4 is 0
  95. * r6: Start of command line string
  96. * r7: End of command line string
  97. * r8: 0
  98. * r9: 0
  99. */
  100. ulong cmd_start = images->cmdline_start;
  101. ulong cmd_end = images->cmdline_end;
  102. ulong initrd_start = images->initrd_start;
  103. ulong initrd_end = images->initrd_end;
  104. bd_t *kbd = images->kbd;
  105. debug (" Booting using board info...\n");
  106. WATCHDOG_RESET ();
  107. (*kernel) (kbd, initrd_start, initrd_end,
  108. cmd_start, cmd_end, 0, 0);
  109. /* does not return */
  110. }
  111. return ;
  112. }
  113. void arch_lmb_reserve(struct lmb *lmb)
  114. {
  115. phys_size_t bootm_size;
  116. ulong size, sp, bootmap_base;
  117. bootmap_base = getenv_bootm_low();
  118. bootm_size = getenv_bootm_size();
  119. #ifdef DEBUG
  120. if (((u64)bootmap_base + bootm_size) >
  121. (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
  122. puts("WARNING: bootm_low + bootm_size exceed total memory\n");
  123. if ((bootmap_base + bootm_size) > get_effective_memsize())
  124. puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
  125. #endif
  126. size = min(bootm_size, get_effective_memsize());
  127. size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
  128. if (size < bootm_size) {
  129. ulong base = bootmap_base + size;
  130. printf("WARNING: adjusting available memory to %lx\n", size);
  131. lmb_reserve(lmb, base, bootm_size - size);
  132. }
  133. /*
  134. * Booting a (Linux) kernel image
  135. *
  136. * Allocate space for command line and board info - the
  137. * address should be as high as possible within the reach of
  138. * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
  139. * memory, which means far enough below the current stack
  140. * pointer.
  141. */
  142. sp = get_sp();
  143. debug ("## Current stack ends at 0x%08lx\n", sp);
  144. /* adjust sp by 1K to be safe */
  145. sp -= 1024;
  146. lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
  147. return ;
  148. }
  149. static void boot_prep_linux(void)
  150. {
  151. #ifdef CONFIG_MP
  152. /* if we are MP make sure to flush the dcache() to any changes are made
  153. * visibile to all other cores */
  154. flush_dcache();
  155. #endif
  156. return ;
  157. }
  158. static int boot_cmdline_linux(bootm_headers_t *images)
  159. {
  160. ulong bootmap_base = getenv_bootm_low();
  161. ulong of_size = images->ft_len;
  162. struct lmb *lmb = &images->lmb;
  163. ulong *cmd_start = &images->cmdline_start;
  164. ulong *cmd_end = &images->cmdline_end;
  165. int ret = 0;
  166. if (!of_size) {
  167. /* allocate space and init command line */
  168. ret = boot_get_cmdline (lmb, cmd_start, cmd_end, bootmap_base);
  169. if (ret) {
  170. puts("ERROR with allocation of cmdline\n");
  171. return ret;
  172. }
  173. }
  174. return ret;
  175. }
  176. static int boot_bd_t_linux(bootm_headers_t *images)
  177. {
  178. ulong bootmap_base = getenv_bootm_low();
  179. ulong of_size = images->ft_len;
  180. struct lmb *lmb = &images->lmb;
  181. bd_t **kbd = &images->kbd;
  182. int ret = 0;
  183. if (!of_size) {
  184. /* allocate space for kernel copy of board info */
  185. ret = boot_get_kbd (lmb, kbd, bootmap_base);
  186. if (ret) {
  187. puts("ERROR with allocation of kernel bd\n");
  188. return ret;
  189. }
  190. set_clocks_in_mhz(*kbd);
  191. }
  192. return ret;
  193. }
  194. static int boot_body_linux(bootm_headers_t *images)
  195. {
  196. ulong rd_len;
  197. struct lmb *lmb = &images->lmb;
  198. ulong *initrd_start = &images->initrd_start;
  199. ulong *initrd_end = &images->initrd_end;
  200. #if defined(CONFIG_OF_LIBFDT)
  201. ulong bootmap_base = getenv_bootm_low();
  202. ulong of_size = images->ft_len;
  203. char **of_flat_tree = &images->ft_addr;
  204. #endif
  205. int ret;
  206. /* allocate space and init command line */
  207. ret = boot_cmdline_linux(images);
  208. if (ret)
  209. return ret;
  210. /* allocate space for kernel copy of board info */
  211. ret = boot_bd_t_linux(images);
  212. if (ret)
  213. return ret;
  214. rd_len = images->rd_end - images->rd_start;
  215. ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end);
  216. if (ret)
  217. return ret;
  218. #if defined(CONFIG_OF_LIBFDT)
  219. ret = boot_relocate_fdt(lmb, bootmap_base, of_flat_tree, &of_size);
  220. if (ret)
  221. return ret;
  222. /*
  223. * Add the chosen node if it doesn't exist, add the env and bd_t
  224. * if the user wants it (the logic is in the subroutines).
  225. */
  226. if (of_size) {
  227. if (fdt_chosen(*of_flat_tree, 1) < 0) {
  228. puts ("ERROR: ");
  229. puts ("/chosen node create failed");
  230. puts (" - must RESET the board to recover.\n");
  231. return -1;
  232. }
  233. #ifdef CONFIG_OF_BOARD_SETUP
  234. /* Call the board-specific fixup routine */
  235. ft_board_setup(*of_flat_tree, gd->bd);
  236. #endif
  237. /* Delete the old LMB reservation */
  238. lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree,
  239. (phys_size_t)fdt_totalsize(*of_flat_tree));
  240. ret = fdt_resize(*of_flat_tree);
  241. if (ret < 0)
  242. return ret;
  243. of_size = ret;
  244. if (*initrd_start && *initrd_end)
  245. of_size += FDT_RAMDISK_OVERHEAD;
  246. /* Create a new LMB reservation */
  247. lmb_reserve(lmb, (ulong)*of_flat_tree, of_size);
  248. /* fixup the initrd now that we know where it should be */
  249. if (*initrd_start && *initrd_end)
  250. fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
  251. }
  252. #endif /* CONFIG_OF_LIBFDT */
  253. return 0;
  254. }
  255. __attribute__((noinline))
  256. int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  257. {
  258. int ret;
  259. if (flag & BOOTM_STATE_OS_CMDLINE) {
  260. boot_cmdline_linux(images);
  261. return 0;
  262. }
  263. if (flag & BOOTM_STATE_OS_BD_T) {
  264. boot_bd_t_linux(images);
  265. return 0;
  266. }
  267. if (flag & BOOTM_STATE_OS_PREP) {
  268. boot_prep_linux();
  269. return 0;
  270. }
  271. if (flag & BOOTM_STATE_OS_GO) {
  272. boot_jump_linux(images);
  273. return 0;
  274. }
  275. boot_prep_linux();
  276. ret = boot_body_linux(images);
  277. if (ret)
  278. return ret;
  279. boot_jump_linux(images);
  280. return 0;
  281. }
  282. static ulong get_sp (void)
  283. {
  284. ulong sp;
  285. asm( "mr %0,1": "=r"(sp) : );
  286. return sp;
  287. }
  288. static void set_clocks_in_mhz (bd_t *kbd)
  289. {
  290. char *s;
  291. if ((s = getenv ("clocks_in_mhz")) != NULL) {
  292. /* convert all clock information to MHz */
  293. kbd->bi_intfreq /= 1000000L;
  294. kbd->bi_busfreq /= 1000000L;
  295. #if defined(CONFIG_MPC8220)
  296. kbd->bi_inpfreq /= 1000000L;
  297. kbd->bi_pcifreq /= 1000000L;
  298. kbd->bi_pevfreq /= 1000000L;
  299. kbd->bi_flbfreq /= 1000000L;
  300. kbd->bi_vcofreq /= 1000000L;
  301. #endif
  302. #if defined(CONFIG_CPM2)
  303. kbd->bi_cpmfreq /= 1000000L;
  304. kbd->bi_brgfreq /= 1000000L;
  305. kbd->bi_sccfreq /= 1000000L;
  306. kbd->bi_vco /= 1000000L;
  307. #endif
  308. #if defined(CONFIG_MPC5xxx)
  309. kbd->bi_ipbfreq /= 1000000L;
  310. kbd->bi_pcifreq /= 1000000L;
  311. #endif /* CONFIG_MPC5xxx */
  312. }
  313. }