acpi.c 4.6 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197
  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 <dm/acpi.h>
  12. DECLARE_GLOBAL_DATA_PTR;
  13. /**
  14. * dump_hdr() - Dump an ACPI header
  15. *
  16. * If the header is for FACS then it shows the revision information as well
  17. *
  18. * @hdr: ACPI header to dump
  19. */
  20. static void dump_hdr(struct acpi_table_header *hdr)
  21. {
  22. bool has_hdr = memcmp(hdr->signature, "FACS", ACPI_NAME_LEN);
  23. printf("%.*s %08lx %06x", ACPI_NAME_LEN, hdr->signature,
  24. (ulong)map_to_sysmem(hdr), hdr->length);
  25. if (has_hdr) {
  26. printf(" (v%02d %.6s %.8s %x %.4s %x)\n", hdr->revision,
  27. hdr->oem_id, hdr->oem_table_id, hdr->oem_revision,
  28. hdr->aslc_id, hdr->aslc_revision);
  29. } else {
  30. printf("\n");
  31. }
  32. }
  33. /**
  34. * find_table() - Look up an ACPI table
  35. *
  36. * @sig: Signature of table (4 characters, upper case)
  37. * @return pointer to table header, or NULL if not found
  38. */
  39. struct acpi_table_header *find_table(const char *sig)
  40. {
  41. struct acpi_rsdp *rsdp;
  42. struct acpi_rsdt *rsdt;
  43. int len, i, count;
  44. rsdp = map_sysmem(gd->arch.acpi_start, 0);
  45. if (!rsdp)
  46. return NULL;
  47. rsdt = map_sysmem(rsdp->rsdt_address, 0);
  48. len = rsdt->header.length - sizeof(rsdt->header);
  49. count = len / sizeof(u32);
  50. for (i = 0; i < count; i++) {
  51. struct acpi_table_header *hdr;
  52. hdr = map_sysmem(rsdt->entry[i], 0);
  53. if (!memcmp(hdr->signature, sig, ACPI_NAME_LEN))
  54. return hdr;
  55. if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN)) {
  56. struct acpi_fadt *fadt = (struct acpi_fadt *)hdr;
  57. if (!memcmp(sig, "DSDT", ACPI_NAME_LEN) && fadt->dsdt)
  58. return map_sysmem(fadt->dsdt, 0);
  59. if (!memcmp(sig, "FACS", ACPI_NAME_LEN) &&
  60. fadt->firmware_ctrl)
  61. return map_sysmem(fadt->firmware_ctrl, 0);
  62. }
  63. }
  64. return NULL;
  65. }
  66. static int dump_table_name(const char *sig)
  67. {
  68. struct acpi_table_header *hdr;
  69. hdr = find_table(sig);
  70. if (!hdr)
  71. return -ENOENT;
  72. printf("%.*s @ %08lx\n", ACPI_NAME_LEN, hdr->signature,
  73. (ulong)map_to_sysmem(hdr));
  74. print_buffer(0, hdr, 1, hdr->length, 0);
  75. return 0;
  76. }
  77. static void list_fadt(struct acpi_fadt *fadt)
  78. {
  79. if (fadt->dsdt)
  80. dump_hdr(map_sysmem(fadt->dsdt, 0));
  81. if (fadt->firmware_ctrl)
  82. dump_hdr(map_sysmem(fadt->firmware_ctrl, 0));
  83. }
  84. static int list_rsdt(struct acpi_rsdt *rsdt, struct acpi_xsdt *xsdt)
  85. {
  86. int len, i, count;
  87. dump_hdr(&rsdt->header);
  88. if (xsdt)
  89. dump_hdr(&xsdt->header);
  90. len = rsdt->header.length - sizeof(rsdt->header);
  91. count = len / sizeof(u32);
  92. for (i = 0; i < count; i++) {
  93. struct acpi_table_header *hdr;
  94. if (!rsdt->entry[i])
  95. break;
  96. hdr = map_sysmem(rsdt->entry[i], 0);
  97. dump_hdr(hdr);
  98. if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN))
  99. list_fadt((struct acpi_fadt *)hdr);
  100. if (xsdt) {
  101. if (xsdt->entry[i] != rsdt->entry[i]) {
  102. printf(" (xsdt mismatch %llx)\n",
  103. xsdt->entry[i]);
  104. }
  105. }
  106. }
  107. return 0;
  108. }
  109. static int list_rsdp(struct acpi_rsdp *rsdp)
  110. {
  111. struct acpi_rsdt *rsdt;
  112. struct acpi_xsdt *xsdt;
  113. printf("RSDP %08lx %06x (v%02d %.6s)\n", (ulong)map_to_sysmem(rsdp),
  114. rsdp->length, rsdp->revision, rsdp->oem_id);
  115. rsdt = map_sysmem(rsdp->rsdt_address, 0);
  116. xsdt = map_sysmem(rsdp->xsdt_address, 0);
  117. list_rsdt(rsdt, xsdt);
  118. return 0;
  119. }
  120. static int do_acpi_list(struct cmd_tbl *cmdtp, int flag, int argc,
  121. char *const argv[])
  122. {
  123. struct acpi_rsdp *rsdp;
  124. rsdp = map_sysmem(gd->arch.acpi_start, 0);
  125. if (!rsdp) {
  126. printf("No ACPI tables present\n");
  127. return 0;
  128. }
  129. printf("ACPI tables start at %lx\n", gd->arch.acpi_start);
  130. list_rsdp(rsdp);
  131. return 0;
  132. }
  133. static int do_acpi_items(struct cmd_tbl *cmdtp, int flag, int argc,
  134. char *const argv[])
  135. {
  136. bool dump_contents;
  137. dump_contents = argc >= 2 && !strcmp("-d", argv[1]);
  138. acpi_dump_items(dump_contents ? ACPI_DUMP_CONTENTS : ACPI_DUMP_LIST);
  139. return 0;
  140. }
  141. static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc,
  142. char *const argv[])
  143. {
  144. const char *name;
  145. char sig[ACPI_NAME_LEN];
  146. int ret;
  147. name = argv[1];
  148. if (strlen(name) != ACPI_NAME_LEN) {
  149. printf("Table name '%s' must be four characters\n", name);
  150. return CMD_RET_FAILURE;
  151. }
  152. str_to_upper(name, sig, -1);
  153. ret = dump_table_name(sig);
  154. if (ret) {
  155. printf("Table '%.*s' not found\n", ACPI_NAME_LEN, sig);
  156. return CMD_RET_FAILURE;
  157. }
  158. return 0;
  159. }
  160. static char acpi_help_text[] =
  161. "list - list ACPI tables\n"
  162. "acpi items [-d] - List/dump each piece of ACPI data from devices\n"
  163. "acpi dump <name> - Dump ACPI table";
  164. U_BOOT_CMD_WITH_SUBCMDS(acpi, "ACPI tables", acpi_help_text,
  165. U_BOOT_SUBCMD_MKENT(list, 1, 1, do_acpi_list),
  166. U_BOOT_SUBCMD_MKENT(items, 2, 1, do_acpi_items),
  167. U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_acpi_dump));