bootm.c 5.6 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 <command.h>
  9. #include <env.h>
  10. #include <hang.h>
  11. #include <image.h>
  12. #include <u-boot/zlib.h>
  13. #include <asm/byteorder.h>
  14. #include <asm/bootm.h>
  15. DECLARE_GLOBAL_DATA_PTR;
  16. #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  17. defined(CONFIG_CMDLINE_TAG) || \
  18. defined(CONFIG_INITRD_TAG) || \
  19. defined(CONFIG_SERIAL_TAG) || \
  20. defined(CONFIG_REVISION_TAG)
  21. static void setup_start_tag(bd_t *bd);
  22. # ifdef CONFIG_SETUP_MEMORY_TAGS
  23. static void setup_memory_tags(bd_t *bd);
  24. # endif
  25. static void setup_commandline_tag(bd_t *bd, char *commandline);
  26. # ifdef CONFIG_INITRD_TAG
  27. static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
  28. # endif
  29. static void setup_end_tag(bd_t *bd);
  30. static struct tag *params;
  31. #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
  32. int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  33. {
  34. bd_t *bd = gd->bd;
  35. char *s;
  36. int machid = bd->bi_arch_number;
  37. void (*theKernel)(int zero, int arch, uint params);
  38. #ifdef CONFIG_CMDLINE_TAG
  39. char *commandline = env_get("bootargs");
  40. #endif
  41. /*
  42. * allow the PREP bootm subcommand, it is required for bootm to work
  43. */
  44. if (flag & BOOTM_STATE_OS_PREP)
  45. return 0;
  46. if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  47. return 1;
  48. theKernel = (void (*)(int, int, uint))images->ep;
  49. s = env_get("machid");
  50. if (s) {
  51. machid = simple_strtoul(s, NULL, 16);
  52. printf("Using machid 0x%x from environment\n", machid);
  53. }
  54. bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  55. debug("## Transferring control to Linux (at address %08lx) ...\n",
  56. (ulong)theKernel);
  57. if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
  58. #ifdef CONFIG_OF_LIBFDT
  59. debug("using: FDT\n");
  60. if (image_setup_linux(images)) {
  61. printf("FDT creation failed! hanging...");
  62. hang();
  63. }
  64. #endif
  65. } else if (BOOTM_ENABLE_TAGS) {
  66. #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  67. defined(CONFIG_CMDLINE_TAG) || \
  68. defined(CONFIG_INITRD_TAG) || \
  69. defined(CONFIG_SERIAL_TAG) || \
  70. defined(CONFIG_REVISION_TAG)
  71. setup_start_tag(bd);
  72. #ifdef CONFIG_SERIAL_TAG
  73. setup_serial_tag(&params);
  74. #endif
  75. #ifdef CONFIG_REVISION_TAG
  76. setup_revision_tag(&params);
  77. #endif
  78. #ifdef CONFIG_SETUP_MEMORY_TAGS
  79. setup_memory_tags(bd);
  80. #endif
  81. #ifdef CONFIG_CMDLINE_TAG
  82. setup_commandline_tag(bd, commandline);
  83. #endif
  84. #ifdef CONFIG_INITRD_TAG
  85. if (images->rd_start && images->rd_end)
  86. setup_initrd_tag(bd, images->rd_start, images->rd_end);
  87. #endif
  88. setup_end_tag(bd);
  89. #endif
  90. /* we assume that the kernel is in place */
  91. printf("\nStarting kernel ...\n\n");
  92. #ifdef CONFIG_USB_DEVICE
  93. {
  94. extern void udc_disconnect(void);
  95. udc_disconnect();
  96. }
  97. #endif
  98. }
  99. cleanup_before_linux();
  100. if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
  101. theKernel(0, machid, (unsigned long)images->ft_addr);
  102. else
  103. theKernel(0, machid, bd->bi_boot_params);
  104. /* does not return */
  105. return 1;
  106. }
  107. #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  108. defined(CONFIG_CMDLINE_TAG) || \
  109. defined(CONFIG_INITRD_TAG) || \
  110. defined(CONFIG_SERIAL_TAG) || \
  111. defined(CONFIG_REVISION_TAG)
  112. static void setup_start_tag(bd_t *bd)
  113. {
  114. params = (struct tag *)bd->bi_boot_params;
  115. params->hdr.tag = ATAG_CORE;
  116. params->hdr.size = tag_size(tag_core);
  117. params->u.core.flags = 0;
  118. params->u.core.pagesize = 0;
  119. params->u.core.rootdev = 0;
  120. params = tag_next(params);
  121. }
  122. #ifdef CONFIG_SETUP_MEMORY_TAGS
  123. static void setup_memory_tags(bd_t *bd)
  124. {
  125. int i;
  126. for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
  127. params->hdr.tag = ATAG_MEM;
  128. params->hdr.size = tag_size(tag_mem32);
  129. params->u.mem.start = bd->bi_dram[i].start;
  130. params->u.mem.size = bd->bi_dram[i].size;
  131. params = tag_next(params);
  132. }
  133. }
  134. #endif /* CONFIG_SETUP_MEMORY_TAGS */
  135. static void setup_commandline_tag(bd_t *bd, char *commandline)
  136. {
  137. char *p;
  138. if (!commandline)
  139. return;
  140. /* eat leading white space */
  141. for (p = commandline; *p == ' '; p++)
  142. ;
  143. /* skip non-existent command lines so the kernel will still
  144. * use its default command line.
  145. */
  146. if (*p == '\0')
  147. return;
  148. params->hdr.tag = ATAG_CMDLINE;
  149. params->hdr.size =
  150. (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
  151. strcpy(params->u.cmdline.cmdline, p)
  152. ;
  153. params = tag_next(params);
  154. }
  155. #ifdef CONFIG_INITRD_TAG
  156. static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
  157. {
  158. /* an ATAG_INITRD node tells the kernel where the compressed
  159. * ramdisk can be found. ATAG_RDIMG is a better name, actually.
  160. */
  161. params->hdr.tag = ATAG_INITRD2;
  162. params->hdr.size = tag_size(tag_initrd);
  163. params->u.initrd.start = initrd_start;
  164. params->u.initrd.size = initrd_end - initrd_start;
  165. params = tag_next(params);
  166. }
  167. #endif /* CONFIG_INITRD_TAG */
  168. #ifdef CONFIG_SERIAL_TAG
  169. void setup_serial_tag(struct tag **tmp)
  170. {
  171. struct tag *params = *tmp;
  172. struct tag_serialnr serialnr;
  173. void get_board_serial(struct tag_serialnr *serialnr);
  174. get_board_serial(&serialnr);
  175. params->hdr.tag = ATAG_SERIAL;
  176. params->hdr.size = tag_size(tag_serialnr);
  177. params->u.serialnr.low = serialnr.low;
  178. params->u.serialnr.high = serialnr.high;
  179. params = tag_next(params);
  180. *tmp = params;
  181. }
  182. #endif
  183. #ifdef CONFIG_REVISION_TAG
  184. void setup_revision_tag(struct tag **in_params)
  185. {
  186. u32 rev = 0;
  187. u32 get_board_rev(void);
  188. rev = get_board_rev();
  189. params->hdr.tag = ATAG_REVISION;
  190. params->hdr.size = tag_size(tag_revision);
  191. params->u.revision.rev = rev;
  192. params = tag_next(params);
  193. }
  194. #endif /* CONFIG_REVISION_TAG */
  195. static void setup_end_tag(bd_t *bd)
  196. {
  197. params->hdr.tag = ATAG_NONE;
  198. params->hdr.size = 0;
  199. }
  200. #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */