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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* The 'smbios' command displays information from the SMBIOS table.
*
* Copyright (c) 2023, Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
*/
#include <command.h>
#include <hexdump.h>
#include <mapmem.h>
#include <smbios.h>
#include <tables_csum.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
static const char * const wakeup_type_strings[] = {
"Reserved", /* 0x00 */
"Other", /* 0x01 */
"Unknown", /* 0x02 */
"APM Timer", /* 0x03 */
"Modem Ring", /* 0x04 */
"Lan Remote", /* 0x05 */
"Power Switch", /* 0x06 */
"PCI PME#", /* 0x07 */
"AC Power Restored", /* 0x08 */
};
/**
* smbios_get_string() - get SMBIOS string from table
*
* @table: SMBIOS table
* @index: index of the string
* Return: address of string, may point to empty string
*/
static const char *smbios_get_string(void *table, int index)
{
const char *str = (char *)table +
((struct smbios_header *)table)->length;
static const char fallback[] = "Not Specified";
if (!index)
return fallback;
if (!*str)
++str;
for (--index; *str && index; --index)
str += strlen(str) + 1;
return str;
}
static struct smbios_header *next_table(struct smbios_header *table)
{
const char *str;
if (table->type == SMBIOS_END_OF_TABLE)
return NULL;
str = smbios_get_string(table, -1);
return (struct smbios_header *)(++str);
}
static void smbios_print_generic(struct smbios_header *table)
{
char *str = (char *)table + table->length;
if (CONFIG_IS_ENABLED(HEXDUMP)) {
printf("Header and Data:\n");
print_hex_dump("\t", DUMP_PREFIX_OFFSET, 16, 1,
table, table->length, false);
}
if (*str) {
printf("Strings:\n");
for (int index = 1; *str; ++index) {
printf("\tString %u: %s\n", index, str);
str += strlen(str) + 1;
}
}
}
void smbios_print_str(const char *label, void *table, u8 index)
{
printf("\t%s: %s\n", label, smbios_get_string(table, index));
}
const char *smbios_wakeup_type_str(u8 wakeup_type)
{
if (wakeup_type >= ARRAY_SIZE(wakeup_type_strings))
/* Values over 0x08 are reserved. */
wakeup_type = 0;
return wakeup_type_strings[wakeup_type];
}
static void smbios_print_type1(struct smbios_type1 *table)
{
printf("System Information\n");
smbios_print_str("Manufacturer", table, table->manufacturer);
smbios_print_str("Product Name", table, table->product_name);
smbios_print_str("Version", table, table->version);
smbios_print_str("Serial Number", table, table->serial_number);
if (table->length >= 0x19) {
printf("\tUUID: %pUl\n", table->uuid);
printf("\tWake-up Type: %s\n",
smbios_wakeup_type_str(table->wakeup_type));
}
if (table->length >= 0x1b) {
smbios_print_str("SKU Number", table, table->sku_number);
smbios_print_str("Family", table, table->family);
}
}
static void smbios_print_type2(struct smbios_type2 *table)
{
u16 *handle;
printf("Base Board Information\n");
smbios_print_str("Manufacturer", table, table->manufacturer);
smbios_print_str("Product Name", table, table->product_name);
smbios_print_str("Version", table, table->version);
smbios_print_str("Serial Number", table, table->serial_number);
smbios_print_str("Asset Tag", table, table->asset_tag_number);
printf("\tFeature Flags: 0x%04x\n", table->feature_flags);
smbios_print_str("Chassis Location", table, table->chassis_location);
printf("\tChassis Handle: 0x%04x\n", table->chassis_handle);
smbios_print_str("Board Type", table, table->board_type);
printf("\tContained Object Handles: ");
handle = (void *)table->eos;
for (int i = 0; i < table->number_contained_objects; ++i)
printf("0x%04x ", handle[i]);
printf("\n");
}
static void smbios_print_type127(struct smbios_type127 *table)
{
printf("End Of Table\n");
}
static int do_smbios(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong addr;
void *entry;
u32 size;
char version[12];
struct smbios_header *table;
static const char smbios_sig[] = "_SM_";
static const char smbios3_sig[] = "_SM3_";
size_t count = 0;
u32 table_maximum_size;
addr = gd_smbios_start();
if (!addr) {
log_warning("SMBIOS not available\n");
return CMD_RET_FAILURE;
}
entry = map_sysmem(addr, 0);
if (!memcmp(entry, smbios3_sig, sizeof(smbios3_sig) - 1)) {
struct smbios3_entry *entry3 = entry;
table = (void *)(uintptr_t)entry3->struct_table_address;
snprintf(version, sizeof(version), "%d.%d.%d",
entry3->major_ver, entry3->minor_ver, entry3->doc_rev);
table = (void *)(uintptr_t)entry3->struct_table_address;
size = entry3->length;
table_maximum_size = entry3->table_maximum_size;
} else if (!memcmp(entry, smbios_sig, sizeof(smbios_sig) - 1)) {
struct smbios_entry *entry2 = entry;
snprintf(version, sizeof(version), "%d.%d",
entry2->major_ver, entry2->minor_ver);
table = (void *)(uintptr_t)entry2->struct_table_address;
size = entry2->length;
table_maximum_size = entry2->struct_table_length;
} else {
log_err("Unknown SMBIOS anchor format\n");
return CMD_RET_FAILURE;
}
if (table_compute_checksum(entry, size)) {
log_err("Invalid anchor checksum\n");
return CMD_RET_FAILURE;
}
printf("SMBIOS %s present.\n", version);
for (struct smbios_header *pos = table; pos; pos = next_table(pos))
++count;
printf("%zd structures occupying %d bytes\n", count, table_maximum_size);
printf("Table at 0x%llx\n", (unsigned long long)map_to_sysmem(table));
for (struct smbios_header *pos = table; pos; pos = next_table(pos)) {
printf("\nHandle 0x%04x, DMI type %d, %d bytes at 0x%llx\n",
pos->handle, pos->type, pos->length,
(unsigned long long)map_to_sysmem(pos));
switch (pos->type) {
case 1:
smbios_print_type1((struct smbios_type1 *)pos);
break;
case 2:
smbios_print_type2((struct smbios_type2 *)pos);
break;
case 127:
smbios_print_type127((struct smbios_type127 *)pos);
break;
default:
smbios_print_generic(pos);
break;
}
}
return CMD_RET_SUCCESS;
}
U_BOOT_LONGHELP(smbios, "- display SMBIOS information");
U_BOOT_CMD(smbios, 1, 0, do_smbios, "display SMBIOS information",
smbios_help_text);
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