diff options
Diffstat (limited to 'cmd/acpi.c')
| -rw-r--r-- | cmd/acpi.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/cmd/acpi.c b/cmd/acpi.c new file mode 100644 index 00000000000..094d9d4e858 --- /dev/null +++ b/cmd/acpi.c @@ -0,0 +1,199 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2019 Google LLC + * Written by Simon Glass <sjg@chromium.org> + */ +#include <command.h> +#include <display_options.h> +#include <log.h> +#include <mapmem.h> +#include <acpi/acpi_table.h> +#include <asm/acpi_table.h> +#include <asm/global_data.h> +#include <linux/errno.h> +#include <dm/acpi.h> + +DECLARE_GLOBAL_DATA_PTR; + +/** + * dump_hdr() - Dump an ACPI header + * + * Except for the Firmware ACPI Control Structure (FACS) + * additionally show the revision information. + * + * @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 %16lx %5x", 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->creator_id, hdr->creator_revision); + } else { + printf("\n"); + } +} + +static int dump_table_name(const char *sig) +{ + struct acpi_table_header *hdr; + + hdr = acpi_find_table(sig); + if (!hdr) + return -ENOENT; + printf("%.*s @ %16lx\n", ACPI_NAME_LEN, hdr->signature, + (ulong)nomap_to_sysmem(hdr)); + print_buffer(0, hdr, 1, hdr->length, 0); + + return 0; +} + +static void list_fadt(struct acpi_fadt *fadt) +{ + if (fadt->header.revision >= 3 && fadt->x_dsdt) + dump_hdr(nomap_sysmem(fadt->x_dsdt, 0)); + else if (fadt->dsdt) + dump_hdr(nomap_sysmem(fadt->dsdt, 0)); + if (!IS_ENABLED(CONFIG_X86) && + !(fadt->flags & ACPI_FADT_HW_REDUCED_ACPI)) + log_err("FADT not ACPI-hardware-reduced-compliant\n"); + if (fadt->header.revision >= 3 && fadt->x_firmware_ctrl) + dump_hdr(nomap_sysmem(fadt->x_firmware_ctrl, 0)); + else if (fadt->firmware_ctrl) + dump_hdr(nomap_sysmem(fadt->firmware_ctrl, 0)); +} + +static void list_rsdt(struct acpi_rsdp *rsdp) +{ + int len, i, count; + struct acpi_rsdt *rsdt; + struct acpi_xsdt *xsdt; + + if (rsdp->rsdt_address) { + rsdt = nomap_sysmem(rsdp->rsdt_address, 0); + dump_hdr(&rsdt->header); + } + if (rsdp->xsdt_address) { + xsdt = nomap_sysmem(rsdp->xsdt_address, 0); + dump_hdr(&xsdt->header); + len = xsdt->header.length - sizeof(xsdt->header); + count = len / sizeof(u64); + } else if (rsdp->rsdt_address) { + len = rsdt->header.length - sizeof(rsdt->header); + count = len / sizeof(u32); + } else { + return; + } + + for (i = 0; i < count; i++) { + struct acpi_table_header *hdr; + u64 entry; + + if (rsdp->xsdt_address) + entry = xsdt->entry[i]; + else + entry = rsdt->entry[i]; + if (!entry) + break; + hdr = nomap_sysmem(entry, 0); + dump_hdr(hdr); + if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN)) + list_fadt((struct acpi_fadt *)hdr); + } +} + +static void list_rsdp(struct acpi_rsdp *rsdp) +{ + printf("RSDP %16lx %5x v%02d %.6s\n", (ulong)map_to_sysmem(rsdp), + rsdp->length, rsdp->revision, rsdp->oem_id); + list_rsdt(rsdp); +} + +static int do_acpi_list(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct acpi_rsdp *rsdp; + + rsdp = map_sysmem(gd_acpi_start(), 0); + if (!rsdp) { + printf("No ACPI tables present\n"); + return 0; + } + printf("Name Base Size Detail\n" + "---- ---------------- ----- ----------------------------\n"); + list_rsdp(rsdp); + + return 0; +} + +static int do_acpi_set(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + ulong val; + + if (argc < 2) { + printf("ACPI pointer: %lx\n", gd_acpi_start()); + } else { + val = hextoul(argv[1], NULL); + printf("Setting ACPI pointer to %lx\n", val); + gd_set_acpi_start(val); + } + + 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]); + if (!IS_ENABLED(CONFIG_ACPIGEN)) { + printf("Not supported (enable ACPIGEN)\n"); + return CMD_RET_FAILURE; + } + 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; + + if (argc < 2) + return CMD_RET_USAGE; + + 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, ACPI_NAME_LEN); + ret = dump_table_name(sig); + if (ret) { + printf("Table '%.*s' not found\n", ACPI_NAME_LEN, sig); + return CMD_RET_FAILURE; + } + + return 0; +} + +U_BOOT_LONGHELP(acpi, + "list - list ACPI tables\n" + "acpi items [-d] - List/dump each piece of ACPI data from devices\n" + "acpi set [<addr>] - Set or show address of ACPI tables\n" + "acpi dump <name> - Dump ACPI table"); + +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(set, 2, 1, do_acpi_set), + U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_acpi_dump)); |