bootm.c 5.8 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246
  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2011 Andes Technology Corporation
  4. * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
  5. * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
  6. */
  7. #include <common.h>
  8. #include <bootstage.h>
  9. #include <command.h>
  10. #include <env.h>
  11. #include <hang.h>
  12. #include <image.h>
  13. #include <log.h>
  14. #include <u-boot/zlib.h>
  15. #include <asm/byteorder.h>
  16. #include <asm/bootm.h>
  17. DECLARE_GLOBAL_DATA_PTR;
  18. #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  19. defined(CONFIG_CMDLINE_TAG) || \
  20. defined(CONFIG_INITRD_TAG) || \
  21. defined(CONFIG_SERIAL_TAG) || \
  22. defined(CONFIG_REVISION_TAG)
  23. static void setup_start_tag(struct bd_info *bd);
  24. # ifdef CONFIG_SETUP_MEMORY_TAGS
  25. static void setup_memory_tags(struct bd_info *bd);
  26. # endif
  27. static void setup_commandline_tag(struct bd_info *bd, char *commandline);
  28. # ifdef CONFIG_INITRD_TAG
  29. static void setup_initrd_tag(struct bd_info *bd, ulong initrd_start,
  30. ulong initrd_end);
  31. # endif
  32. static void setup_end_tag(struct bd_info *bd);
  33. static struct tag *params;
  34. #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
  35. int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  36. {
  37. struct bd_info *bd = gd->bd;
  38. char *s;
  39. int machid = bd->bi_arch_number;
  40. void (*theKernel)(int zero, int arch, uint params);
  41. #ifdef CONFIG_CMDLINE_TAG
  42. char *commandline = env_get("bootargs");
  43. #endif
  44. /*
  45. * allow the PREP bootm subcommand, it is required for bootm to work
  46. */
  47. if (flag & BOOTM_STATE_OS_PREP)
  48. return 0;
  49. if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  50. return 1;
  51. theKernel = (void (*)(int, int, uint))images->ep;
  52. s = env_get("machid");
  53. if (s) {
  54. machid = simple_strtoul(s, NULL, 16);
  55. printf("Using machid 0x%x from environment\n", machid);
  56. }
  57. bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  58. debug("## Transferring control to Linux (at address %08lx) ...\n",
  59. (ulong)theKernel);
  60. if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
  61. #ifdef CONFIG_OF_LIBFDT
  62. debug("using: FDT\n");
  63. if (image_setup_linux(images)) {
  64. printf("FDT creation failed! hanging...");
  65. hang();
  66. }
  67. #endif
  68. } else if (BOOTM_ENABLE_TAGS) {
  69. #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  70. defined(CONFIG_CMDLINE_TAG) || \
  71. defined(CONFIG_INITRD_TAG) || \
  72. defined(CONFIG_SERIAL_TAG) || \
  73. defined(CONFIG_REVISION_TAG)
  74. setup_start_tag(bd);
  75. #ifdef CONFIG_SERIAL_TAG
  76. setup_serial_tag(&params);
  77. #endif
  78. #ifdef CONFIG_REVISION_TAG
  79. setup_revision_tag(&params);
  80. #endif
  81. #ifdef CONFIG_SETUP_MEMORY_TAGS
  82. setup_memory_tags(bd);
  83. #endif
  84. #ifdef CONFIG_CMDLINE_TAG
  85. setup_commandline_tag(bd, commandline);
  86. #endif
  87. #ifdef CONFIG_INITRD_TAG
  88. if (images->rd_start && images->rd_end)
  89. setup_initrd_tag(bd, images->rd_start, images->rd_end);
  90. #endif
  91. setup_end_tag(bd);
  92. #endif
  93. /* we assume that the kernel is in place */
  94. printf("\nStarting kernel ...\n\n");
  95. #ifdef CONFIG_USB_DEVICE
  96. {
  97. extern void udc_disconnect(void);
  98. udc_disconnect();
  99. }
  100. #endif
  101. }
  102. cleanup_before_linux();
  103. if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
  104. theKernel(0, machid, (unsigned long)images->ft_addr);
  105. else
  106. theKernel(0, machid, bd->bi_boot_params);
  107. /* does not return */
  108. return 1;
  109. }
  110. #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  111. defined(CONFIG_CMDLINE_TAG) || \
  112. defined(CONFIG_INITRD_TAG) || \
  113. defined(CONFIG_SERIAL_TAG) || \
  114. defined(CONFIG_REVISION_TAG)
  115. static void setup_start_tag(struct bd_info *bd)
  116. {
  117. params = (struct tag *)bd->bi_boot_params;
  118. params->hdr.tag = ATAG_CORE;
  119. params->hdr.size = tag_size(tag_core);
  120. params->u.core.flags = 0;
  121. params->u.core.pagesize = 0;
  122. params->u.core.rootdev = 0;
  123. params = tag_next(params);
  124. }
  125. #ifdef CONFIG_SETUP_MEMORY_TAGS
  126. static void setup_memory_tags(struct bd_info *bd)
  127. {
  128. int i;
  129. for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
  130. params->hdr.tag = ATAG_MEM;
  131. params->hdr.size = tag_size(tag_mem32);
  132. params->u.mem.start = bd->bi_dram[i].start;
  133. params->u.mem.size = bd->bi_dram[i].size;
  134. params = tag_next(params);
  135. }
  136. }
  137. #endif /* CONFIG_SETUP_MEMORY_TAGS */
  138. static void setup_commandline_tag(struct bd_info *bd, char *commandline)
  139. {
  140. char *p;
  141. if (!commandline)
  142. return;
  143. /* eat leading white space */
  144. for (p = commandline; *p == ' '; p++)
  145. ;
  146. /* skip non-existent command lines so the kernel will still
  147. * use its default command line.
  148. */
  149. if (*p == '\0')
  150. return;
  151. params->hdr.tag = ATAG_CMDLINE;
  152. params->hdr.size =
  153. (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
  154. strcpy(params->u.cmdline.cmdline, p)
  155. ;
  156. params = tag_next(params);
  157. }
  158. #ifdef CONFIG_INITRD_TAG
  159. static void setup_initrd_tag(struct bd_info *bd, ulong initrd_start,
  160. ulong initrd_end)
  161. {
  162. /* an ATAG_INITRD node tells the kernel where the compressed
  163. * ramdisk can be found. ATAG_RDIMG is a better name, actually.
  164. */
  165. params->hdr.tag = ATAG_INITRD2;
  166. params->hdr.size = tag_size(tag_initrd);
  167. params->u.initrd.start = initrd_start;
  168. params->u.initrd.size = initrd_end - initrd_start;
  169. params = tag_next(params);
  170. }
  171. #endif /* CONFIG_INITRD_TAG */
  172. #ifdef CONFIG_SERIAL_TAG
  173. void setup_serial_tag(struct tag **tmp)
  174. {
  175. struct tag *params = *tmp;
  176. struct tag_serialnr serialnr;
  177. void get_board_serial(struct tag_serialnr *serialnr);
  178. get_board_serial(&serialnr);
  179. params->hdr.tag = ATAG_SERIAL;
  180. params->hdr.size = tag_size(tag_serialnr);
  181. params->u.serialnr.low = serialnr.low;
  182. params->u.serialnr.high = serialnr.high;
  183. params = tag_next(params);
  184. *tmp = params;
  185. }
  186. #endif
  187. #ifdef CONFIG_REVISION_TAG
  188. void setup_revision_tag(struct tag **in_params)
  189. {
  190. u32 rev = 0;
  191. u32 get_board_rev(void);
  192. rev = get_board_rev();
  193. params->hdr.tag = ATAG_REVISION;
  194. params->hdr.size = tag_size(tag_revision);
  195. params->u.revision.rev = rev;
  196. params = tag_next(params);
  197. }
  198. #endif /* CONFIG_REVISION_TAG */
  199. static void setup_end_tag(struct bd_info *bd)
  200. {
  201. params->hdr.tag = ATAG_NONE;
  202. params->hdr.size = 0;
  203. }
  204. #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */