acpi.c 4.7 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200
  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright 2019 Google LLC
  4. * Written by Simon Glass <sjg@chromium.org>
  5. */
  6. #include <common.h>
  7. #include <command.h>
  8. #include <mapmem.h>
  9. #include <acpi/acpi_table.h>
  10. #include <asm/acpi_table.h>
  11. #include <asm/global_data.h>
  12. #include <dm/acpi.h>
  13. DECLARE_GLOBAL_DATA_PTR;
  14. /**
  15. * dump_hdr() - Dump an ACPI header
  16. *
  17. * If the header is for FACS then it shows the revision information as well
  18. *
  19. * @hdr: ACPI header to dump
  20. */
  21. static void dump_hdr(struct acpi_table_header *hdr)
  22. {
  23. bool has_hdr = memcmp(hdr->signature, "FACS", ACPI_NAME_LEN);
  24. printf("%.*s %08lx %06x", ACPI_NAME_LEN, hdr->signature,
  25. (ulong)map_to_sysmem(hdr), hdr->length);
  26. if (has_hdr) {
  27. printf(" (v%02d %.6s %.8s %x %.4s %x)\n", hdr->revision,
  28. hdr->oem_id, hdr->oem_table_id, hdr->oem_revision,
  29. hdr->aslc_id, hdr->aslc_revision);
  30. } else {
  31. printf("\n");
  32. }
  33. }
  34. /**
  35. * find_table() - Look up an ACPI table
  36. *
  37. * @sig: Signature of table (4 characters, upper case)
  38. * @return pointer to table header, or NULL if not found
  39. */
  40. struct acpi_table_header *find_table(const char *sig)
  41. {
  42. struct acpi_rsdp *rsdp;
  43. struct acpi_rsdt *rsdt;
  44. int len, i, count;
  45. rsdp = map_sysmem(gd->arch.acpi_start, 0);
  46. if (!rsdp)
  47. return NULL;
  48. rsdt = map_sysmem(rsdp->rsdt_address, 0);
  49. len = rsdt->header.length - sizeof(rsdt->header);
  50. count = len / sizeof(u32);
  51. for (i = 0; i < count; i++) {
  52. struct acpi_table_header *hdr;
  53. hdr = map_sysmem(rsdt->entry[i], 0);
  54. if (!memcmp(hdr->signature, sig, ACPI_NAME_LEN))
  55. return hdr;
  56. if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN)) {
  57. struct acpi_fadt *fadt = (struct acpi_fadt *)hdr;
  58. if (!memcmp(sig, "DSDT", ACPI_NAME_LEN) && fadt->dsdt)
  59. return map_sysmem(fadt->dsdt, 0);
  60. if (!memcmp(sig, "FACS", ACPI_NAME_LEN) &&
  61. fadt->firmware_ctrl)
  62. return map_sysmem(fadt->firmware_ctrl, 0);
  63. }
  64. }
  65. return NULL;
  66. }
  67. static int dump_table_name(const char *sig)
  68. {
  69. struct acpi_table_header *hdr;
  70. hdr = find_table(sig);
  71. if (!hdr)
  72. return -ENOENT;
  73. printf("%.*s @ %08lx\n", ACPI_NAME_LEN, hdr->signature,
  74. (ulong)map_to_sysmem(hdr));
  75. print_buffer(0, hdr, 1, hdr->length, 0);
  76. return 0;
  77. }
  78. static void list_fadt(struct acpi_fadt *fadt)
  79. {
  80. if (fadt->dsdt)
  81. dump_hdr(map_sysmem(fadt->dsdt, 0));
  82. if (fadt->firmware_ctrl)
  83. dump_hdr(map_sysmem(fadt->firmware_ctrl, 0));
  84. }
  85. static int list_rsdt(struct acpi_rsdt *rsdt, struct acpi_xsdt *xsdt)
  86. {
  87. int len, i, count;
  88. dump_hdr(&rsdt->header);
  89. if (xsdt)
  90. dump_hdr(&xsdt->header);
  91. len = rsdt->header.length - sizeof(rsdt->header);
  92. count = len / sizeof(u32);
  93. for (i = 0; i < count; i++) {
  94. struct acpi_table_header *hdr;
  95. if (!rsdt->entry[i])
  96. break;
  97. hdr = map_sysmem(rsdt->entry[i], 0);
  98. dump_hdr(hdr);
  99. if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN))
  100. list_fadt((struct acpi_fadt *)hdr);
  101. if (xsdt) {
  102. if (xsdt->entry[i] != rsdt->entry[i]) {
  103. printf(" (xsdt mismatch %llx)\n",
  104. xsdt->entry[i]);
  105. }
  106. }
  107. }
  108. return 0;
  109. }
  110. static int list_rsdp(struct acpi_rsdp *rsdp)
  111. {
  112. struct acpi_rsdt *rsdt;
  113. struct acpi_xsdt *xsdt;
  114. printf("RSDP %08lx %06x (v%02d %.6s)\n", (ulong)map_to_sysmem(rsdp),
  115. rsdp->length, rsdp->revision, rsdp->oem_id);
  116. rsdt = map_sysmem(rsdp->rsdt_address, 0);
  117. xsdt = map_sysmem(rsdp->xsdt_address, 0);
  118. list_rsdt(rsdt, xsdt);
  119. return 0;
  120. }
  121. static int do_acpi_list(struct cmd_tbl *cmdtp, int flag, int argc,
  122. char *const argv[])
  123. {
  124. struct acpi_rsdp *rsdp;
  125. rsdp = map_sysmem(gd->arch.acpi_start, 0);
  126. if (!rsdp) {
  127. printf("No ACPI tables present\n");
  128. return 0;
  129. }
  130. printf("ACPI tables start at %lx\n", gd->arch.acpi_start);
  131. list_rsdp(rsdp);
  132. return 0;
  133. }
  134. static int do_acpi_items(struct cmd_tbl *cmdtp, int flag, int argc,
  135. char *const argv[])
  136. {
  137. bool dump_contents;
  138. dump_contents = argc >= 2 && !strcmp("-d", argv[1]);
  139. acpi_dump_items(dump_contents ? ACPI_DUMP_CONTENTS : ACPI_DUMP_LIST);
  140. return 0;
  141. }
  142. static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc,
  143. char *const argv[])
  144. {
  145. const char *name;
  146. char sig[ACPI_NAME_LEN];
  147. int ret;
  148. name = argv[1];
  149. if (strlen(name) != ACPI_NAME_LEN) {
  150. printf("Table name '%s' must be four characters\n", name);
  151. return CMD_RET_FAILURE;
  152. }
  153. str_to_upper(name, sig, -1);
  154. ret = dump_table_name(sig);
  155. if (ret) {
  156. printf("Table '%.*s' not found\n", ACPI_NAME_LEN, sig);
  157. return CMD_RET_FAILURE;
  158. }
  159. return 0;
  160. }
  161. #ifdef CONFIG_SYS_LONGHELP
  162. static char acpi_help_text[] =
  163. "list - list ACPI tables\n"
  164. "acpi items [-d] - List/dump each piece of ACPI data from devices\n"
  165. "acpi dump <name> - Dump ACPI table";
  166. #endif
  167. U_BOOT_CMD_WITH_SUBCMDS(acpi, "ACPI tables", acpi_help_text,
  168. U_BOOT_SUBCMD_MKENT(list, 1, 1, do_acpi_list),
  169. U_BOOT_SUBCMD_MKENT(items, 2, 1, do_acpi_items),
  170. U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_acpi_dump));