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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 <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 %u %.4s %d)\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(cmd_tbl_t *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_dump(cmd_tbl_t *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, -1);
ret = dump_table_name(sig);
if (ret) {
printf("Table '%.*s' not found\n", ACPI_NAME_LEN, sig);
return CMD_RET_FAILURE;
}
return 0;
}
static char acpi_help_text[] =
"list - list 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(dump, 2, 1, do_acpi_dump));
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