1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2019 Google LLC
4 * Written by Simon Glass <sjg@chromium.org>
8 #include <display_options.h>
10 #include <acpi/acpi_table.h>
11 #include <asm/acpi_table.h>
12 #include <asm/global_data.h>
15 DECLARE_GLOBAL_DATA_PTR;
18 * dump_hdr() - Dump an ACPI header
20 * If the header is for FACS then it shows the revision information as well
22 * @hdr: ACPI header to dump
24 static void dump_hdr(struct acpi_table_header *hdr)
26 bool has_hdr = memcmp(hdr->signature, "FACS", ACPI_NAME_LEN);
28 printf("%.*s %08lx %5x", ACPI_NAME_LEN, hdr->signature,
29 (ulong)map_to_sysmem(hdr), hdr->length);
31 printf(" v%02d %.6s %.8s %x %.4s %x\n", hdr->revision,
32 hdr->oem_id, hdr->oem_table_id, hdr->oem_revision,
33 hdr->aslc_id, hdr->aslc_revision);
39 static int dump_table_name(const char *sig)
41 struct acpi_table_header *hdr;
43 hdr = acpi_find_table(sig);
46 printf("%.*s @ %08lx\n", ACPI_NAME_LEN, hdr->signature,
47 (ulong)map_to_sysmem(hdr));
48 print_buffer(0, hdr, 1, hdr->length, 0);
53 static void list_fadt(struct acpi_fadt *fadt)
56 dump_hdr(map_sysmem(fadt->dsdt, 0));
57 if (fadt->firmware_ctrl)
58 dump_hdr(map_sysmem(fadt->firmware_ctrl, 0));
61 static int list_rsdt(struct acpi_rsdt *rsdt, struct acpi_xsdt *xsdt)
65 dump_hdr(&rsdt->header);
67 dump_hdr(&xsdt->header);
68 len = rsdt->header.length - sizeof(rsdt->header);
69 count = len / sizeof(u32);
70 for (i = 0; i < count; i++) {
71 struct acpi_table_header *hdr;
75 hdr = map_sysmem(rsdt->entry[i], 0);
77 if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN))
78 list_fadt((struct acpi_fadt *)hdr);
80 if (xsdt->entry[i] != rsdt->entry[i]) {
81 printf(" (xsdt mismatch %llx)\n",
90 static int list_rsdp(struct acpi_rsdp *rsdp)
92 struct acpi_rsdt *rsdt;
93 struct acpi_xsdt *xsdt;
95 printf("RSDP %08lx %5x v%02d %.6s\n", (ulong)map_to_sysmem(rsdp),
96 rsdp->length, rsdp->revision, rsdp->oem_id);
97 rsdt = map_sysmem(rsdp->rsdt_address, 0);
98 xsdt = map_sysmem(rsdp->xsdt_address, 0);
99 list_rsdt(rsdt, xsdt);
104 static int do_acpi_list(struct cmd_tbl *cmdtp, int flag, int argc,
107 struct acpi_rsdp *rsdp;
109 rsdp = map_sysmem(gd_acpi_start(), 0);
111 printf("No ACPI tables present\n");
114 printf("Name Base Size Detail\n");
115 printf("---- -------- ----- ------\n");
121 static int do_acpi_set(struct cmd_tbl *cmdtp, int flag, int argc,
127 printf("ACPI pointer: %lx\n", gd_acpi_start());
129 val = hextoul(argv[1], NULL);
130 printf("Setting ACPI pointer to %lx\n", val);
131 gd_set_acpi_start(val);
137 static int do_acpi_items(struct cmd_tbl *cmdtp, int flag, int argc,
142 dump_contents = argc >= 2 && !strcmp("-d", argv[1]);
143 if (!IS_ENABLED(CONFIG_ACPIGEN)) {
144 printf("Not supported (enable ACPIGEN)\n");
145 return CMD_RET_FAILURE;
147 acpi_dump_items(dump_contents ? ACPI_DUMP_CONTENTS : ACPI_DUMP_LIST);
152 static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc,
156 char sig[ACPI_NAME_LEN];
160 if (strlen(name) != ACPI_NAME_LEN) {
161 printf("Table name '%s' must be four characters\n", name);
162 return CMD_RET_FAILURE;
164 str_to_upper(name, sig, ACPI_NAME_LEN);
165 ret = dump_table_name(sig);
167 printf("Table '%.*s' not found\n", ACPI_NAME_LEN, sig);
168 return CMD_RET_FAILURE;
174 #ifdef CONFIG_SYS_LONGHELP
175 static char acpi_help_text[] =
176 "list - list ACPI tables\n"
177 "acpi items [-d] - List/dump each piece of ACPI data from devices\n"
178 "acpi set [<addr>] - Set or show address of ACPI tables\n"
179 "acpi dump <name> - Dump ACPI table";
182 U_BOOT_CMD_WITH_SUBCMDS(acpi, "ACPI tables", acpi_help_text,
183 U_BOOT_SUBCMD_MKENT(list, 1, 1, do_acpi_list),
184 U_BOOT_SUBCMD_MKENT(items, 2, 1, do_acpi_items),
185 U_BOOT_SUBCMD_MKENT(set, 2, 1, do_acpi_set),
186 U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_acpi_dump));