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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright 2019 Google LLC
- * Written by Simon Glass <sjg@chromium.org>
- */
- #include <common.h>
- #include <command.h>
- #include <mapmem.h>
- #include <acpi/acpi_table.h>
- #include <asm/acpi_table.h>
- #include <asm/global_data.h>
- #include <dm/acpi.h>
- DECLARE_GLOBAL_DATA_PTR;
- /**
- * dump_hdr() - Dump an ACPI header
- *
- * If the header is for FACS then it shows the revision information as well
- *
- * @hdr: ACPI header to dump
- */
- static void dump_hdr(struct acpi_table_header *hdr)
- {
- bool has_hdr = memcmp(hdr->signature, "FACS", ACPI_NAME_LEN);
- printf("%.*s %08lx %06x", ACPI_NAME_LEN, hdr->signature,
- (ulong)map_to_sysmem(hdr), hdr->length);
- if (has_hdr) {
- printf(" (v%02d %.6s %.8s %x %.4s %x)\n", hdr->revision,
- hdr->oem_id, hdr->oem_table_id, hdr->oem_revision,
- hdr->aslc_id, hdr->aslc_revision);
- } else {
- printf("\n");
- }
- }
- /**
- * find_table() - Look up an ACPI table
- *
- * @sig: Signature of table (4 characters, upper case)
- * @return pointer to table header, or NULL if not found
- */
- struct acpi_table_header *find_table(const char *sig)
- {
- struct acpi_rsdp *rsdp;
- struct acpi_rsdt *rsdt;
- int len, i, count;
- rsdp = map_sysmem(gd->arch.acpi_start, 0);
- if (!rsdp)
- return NULL;
- rsdt = map_sysmem(rsdp->rsdt_address, 0);
- len = rsdt->header.length - sizeof(rsdt->header);
- count = len / sizeof(u32);
- for (i = 0; i < count; i++) {
- struct acpi_table_header *hdr;
- hdr = map_sysmem(rsdt->entry[i], 0);
- if (!memcmp(hdr->signature, sig, ACPI_NAME_LEN))
- return hdr;
- if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN)) {
- struct acpi_fadt *fadt = (struct acpi_fadt *)hdr;
- if (!memcmp(sig, "DSDT", ACPI_NAME_LEN) && fadt->dsdt)
- return map_sysmem(fadt->dsdt, 0);
- if (!memcmp(sig, "FACS", ACPI_NAME_LEN) &&
- fadt->firmware_ctrl)
- return map_sysmem(fadt->firmware_ctrl, 0);
- }
- }
- return NULL;
- }
- static int dump_table_name(const char *sig)
- {
- struct acpi_table_header *hdr;
- hdr = find_table(sig);
- if (!hdr)
- return -ENOENT;
- printf("%.*s @ %08lx\n", ACPI_NAME_LEN, hdr->signature,
- (ulong)map_to_sysmem(hdr));
- print_buffer(0, hdr, 1, hdr->length, 0);
- return 0;
- }
- static void list_fadt(struct acpi_fadt *fadt)
- {
- if (fadt->dsdt)
- dump_hdr(map_sysmem(fadt->dsdt, 0));
- if (fadt->firmware_ctrl)
- dump_hdr(map_sysmem(fadt->firmware_ctrl, 0));
- }
- static int list_rsdt(struct acpi_rsdt *rsdt, struct acpi_xsdt *xsdt)
- {
- int len, i, count;
- dump_hdr(&rsdt->header);
- if (xsdt)
- dump_hdr(&xsdt->header);
- len = rsdt->header.length - sizeof(rsdt->header);
- count = len / sizeof(u32);
- for (i = 0; i < count; i++) {
- struct acpi_table_header *hdr;
- if (!rsdt->entry[i])
- break;
- hdr = map_sysmem(rsdt->entry[i], 0);
- dump_hdr(hdr);
- if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN))
- list_fadt((struct acpi_fadt *)hdr);
- if (xsdt) {
- if (xsdt->entry[i] != rsdt->entry[i]) {
- printf(" (xsdt mismatch %llx)\n",
- xsdt->entry[i]);
- }
- }
- }
- return 0;
- }
- static int list_rsdp(struct acpi_rsdp *rsdp)
- {
- struct acpi_rsdt *rsdt;
- struct acpi_xsdt *xsdt;
- printf("RSDP %08lx %06x (v%02d %.6s)\n", (ulong)map_to_sysmem(rsdp),
- rsdp->length, rsdp->revision, rsdp->oem_id);
- rsdt = map_sysmem(rsdp->rsdt_address, 0);
- xsdt = map_sysmem(rsdp->xsdt_address, 0);
- list_rsdt(rsdt, xsdt);
- return 0;
- }
- static int do_acpi_list(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- struct acpi_rsdp *rsdp;
- rsdp = map_sysmem(gd->arch.acpi_start, 0);
- if (!rsdp) {
- printf("No ACPI tables present\n");
- return 0;
- }
- printf("ACPI tables start at %lx\n", gd->arch.acpi_start);
- list_rsdp(rsdp);
- return 0;
- }
- static int do_acpi_items(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- bool dump_contents;
- dump_contents = argc >= 2 && !strcmp("-d", argv[1]);
- acpi_dump_items(dump_contents ? ACPI_DUMP_CONTENTS : ACPI_DUMP_LIST);
- return 0;
- }
- static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- const char *name;
- char sig[ACPI_NAME_LEN];
- int ret;
- name = argv[1];
- if (strlen(name) != ACPI_NAME_LEN) {
- printf("Table name '%s' must be four characters\n", name);
- return CMD_RET_FAILURE;
- }
- str_to_upper(name, sig, -1);
- ret = dump_table_name(sig);
- if (ret) {
- printf("Table '%.*s' not found\n", ACPI_NAME_LEN, sig);
- return CMD_RET_FAILURE;
- }
- return 0;
- }
- #ifdef CONFIG_SYS_LONGHELP
- static char acpi_help_text[] =
- "list - list ACPI tables\n"
- "acpi items [-d] - List/dump each piece of ACPI data from devices\n"
- "acpi dump <name> - Dump ACPI table";
- #endif
- U_BOOT_CMD_WITH_SUBCMDS(acpi, "ACPI tables", acpi_help_text,
- U_BOOT_SUBCMD_MKENT(list, 1, 1, do_acpi_list),
- U_BOOT_SUBCMD_MKENT(items, 2, 1, do_acpi_items),
- U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_acpi_dump));
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