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// 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));
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