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 <display_options.h> 9#include <log.h> 10#include <mapmem.h> 11#include <acpi/acpi_table.h> 12#include <asm/acpi_table.h> 13#include <asm/global_data.h> 14#include <dm/acpi.h> 15 16DECLARE_GLOBAL_DATA_PTR; 17 18/** 19 * dump_hdr() - Dump an ACPI header 20 * 21 * Except for the Firmware ACPI Control Structure (FACS) 22 * additionally show the revision information. 23 * 24 * @hdr: ACPI header to dump 25 */ 26static void dump_hdr(struct acpi_table_header *hdr) 27{ 28 bool has_hdr = memcmp(hdr->signature, "FACS", ACPI_NAME_LEN); 29 30 printf("%.*s %16lx %5x", ACPI_NAME_LEN, hdr->signature, 31 (ulong)map_to_sysmem(hdr), hdr->length); 32 if (has_hdr) { 33 printf(" v%02d %.6s %.8s %x %.4s %x\n", hdr->revision, 34 hdr->oem_id, hdr->oem_table_id, hdr->oem_revision, 35 hdr->creator_id, hdr->creator_revision); 36 } else { 37 printf("\n"); 38 } 39} 40 41static int dump_table_name(const char *sig) 42{ 43 struct acpi_table_header *hdr; 44 45 hdr = acpi_find_table(sig); 46 if (!hdr) 47 return -ENOENT; 48 printf("%.*s @ %16lx\n", ACPI_NAME_LEN, hdr->signature, 49 (ulong)nomap_to_sysmem(hdr)); 50 print_buffer(0, hdr, 1, hdr->length, 0); 51 52 return 0; 53} 54 55static void list_fadt(struct acpi_fadt *fadt) 56{ 57 if (fadt->header.revision >= 3 && fadt->x_dsdt) 58 dump_hdr(nomap_sysmem(fadt->x_dsdt, 0)); 59 else if (fadt->dsdt) 60 dump_hdr(nomap_sysmem(fadt->dsdt, 0)); 61 if (!IS_ENABLED(CONFIG_X86) && 62 !(fadt->flags & ACPI_FADT_HW_REDUCED_ACPI)) 63 log_err("FADT not ACPI-hardware-reduced-compliant\n"); 64 if (fadt->header.revision >= 3 && fadt->x_firmware_ctrl) 65 dump_hdr(nomap_sysmem(fadt->x_firmware_ctrl, 0)); 66 else if (fadt->firmware_ctrl) 67 dump_hdr(nomap_sysmem(fadt->firmware_ctrl, 0)); 68} 69 70static void list_rsdt(struct acpi_rsdp *rsdp) 71{ 72 int len, i, count; 73 struct acpi_rsdt *rsdt; 74 struct acpi_xsdt *xsdt; 75 76 if (rsdp->rsdt_address) { 77 rsdt = nomap_sysmem(rsdp->rsdt_address, 0); 78 dump_hdr(&rsdt->header); 79 } 80 if (rsdp->xsdt_address) { 81 xsdt = nomap_sysmem(rsdp->xsdt_address, 0); 82 dump_hdr(&xsdt->header); 83 len = xsdt->header.length - sizeof(xsdt->header); 84 count = len / sizeof(u64); 85 } else if (rsdp->rsdt_address) { 86 len = rsdt->header.length - sizeof(rsdt->header); 87 count = len / sizeof(u32); 88 } else { 89 return; 90 } 91 92 for (i = 0; i < count; i++) { 93 struct acpi_table_header *hdr; 94 u64 entry; 95 96 if (rsdp->xsdt_address) 97 entry = xsdt->entry[i]; 98 else 99 entry = rsdt->entry[i]; 100 if (!entry) 101 break; 102 hdr = nomap_sysmem(entry, 0); 103 dump_hdr(hdr); 104 if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN)) 105 list_fadt((struct acpi_fadt *)hdr); 106 } 107} 108 109static void list_rsdp(struct acpi_rsdp *rsdp) 110{ 111 printf("RSDP %16lx %5x v%02d %.6s\n", (ulong)map_to_sysmem(rsdp), 112 rsdp->length, rsdp->revision, rsdp->oem_id); 113 list_rsdt(rsdp); 114} 115 116static int do_acpi_list(struct cmd_tbl *cmdtp, int flag, int argc, 117 char *const argv[]) 118{ 119 struct acpi_rsdp *rsdp; 120 121 rsdp = map_sysmem(gd_acpi_start(), 0); 122 if (!rsdp) { 123 printf("No ACPI tables present\n"); 124 return 0; 125 } 126 printf("Name Base Size Detail\n" 127 "---- ---------------- ----- ----------------------------\n"); 128 list_rsdp(rsdp); 129 130 return 0; 131} 132 133static int do_acpi_set(struct cmd_tbl *cmdtp, int flag, int argc, 134 char *const argv[]) 135{ 136 ulong val; 137 138 if (argc < 2) { 139 printf("ACPI pointer: %lx\n", gd_acpi_start()); 140 } else { 141 val = hextoul(argv[1], NULL); 142 printf("Setting ACPI pointer to %lx\n", val); 143 gd_set_acpi_start(val); 144 } 145 146 return 0; 147} 148 149static int do_acpi_items(struct cmd_tbl *cmdtp, int flag, int argc, 150 char *const argv[]) 151{ 152 bool dump_contents; 153 154 dump_contents = argc >= 2 && !strcmp("-d", argv[1]); 155 if (!IS_ENABLED(CONFIG_ACPIGEN)) { 156 printf("Not supported (enable ACPIGEN)\n"); 157 return CMD_RET_FAILURE; 158 } 159 acpi_dump_items(dump_contents ? ACPI_DUMP_CONTENTS : ACPI_DUMP_LIST); 160 161 return 0; 162} 163 164static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc, 165 char *const argv[]) 166{ 167 const char *name; 168 char sig[ACPI_NAME_LEN]; 169 int ret; 170 171 if (argc < 2) 172 return CMD_RET_USAGE; 173 174 name = argv[1]; 175 if (strlen(name) != ACPI_NAME_LEN) { 176 printf("Table name '%s' must be four characters\n", name); 177 return CMD_RET_FAILURE; 178 } 179 str_to_upper(name, sig, ACPI_NAME_LEN); 180 ret = dump_table_name(sig); 181 if (ret) { 182 printf("Table '%.*s' not found\n", ACPI_NAME_LEN, sig); 183 return CMD_RET_FAILURE; 184 } 185 186 return 0; 187} 188 189U_BOOT_LONGHELP(acpi, 190 "list - list ACPI tables\n" 191 "acpi items [-d] - List/dump each piece of ACPI data from devices\n" 192 "acpi set [<addr>] - Set or show address of ACPI tables\n" 193 "acpi dump <name> - Dump ACPI table"); 194 195U_BOOT_CMD_WITH_SUBCMDS(acpi, "ACPI tables", acpi_help_text, 196 U_BOOT_SUBCMD_MKENT(list, 1, 1, do_acpi_list), 197 U_BOOT_SUBCMD_MKENT(items, 2, 1, do_acpi_items), 198 U_BOOT_SUBCMD_MKENT(set, 2, 1, do_acpi_set), 199 U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_acpi_dump)); 200