bootm.c 5.7 KB

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