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// SPDX-License-Identifier: GPL-2.0+
/*
* EFI application tables support
*
* Copyright (c) 2016 Alexander Graf
*/
#define LOG_CATEGORY LOGC_EFI
#include <efi_loader.h>
#include <log.h>
#include <malloc.h>
#include <mapmem.h>
#include <smbios.h>
#include <linux/sizes.h>
enum {
TABLE_SIZE = SZ_4K,
};
/*
* Install the SMBIOS table as a configuration table.
*
* Return: status code
*/
efi_status_t efi_smbios_register(void)
{
ulong addr;
efi_status_t ret;
addr = gd->arch.smbios_start;
if (!addr) {
log_err("No SMBIOS tables to install\n");
return EFI_NOT_FOUND;
}
/* Mark space used for tables */
ret = efi_add_memory_map(addr, TABLE_SIZE, EFI_RUNTIME_SERVICES_DATA);
if (ret)
return ret;
log_debug("EFI using SMBIOS tables at %lx\n", addr);
/* Install SMBIOS information as configuration table */
return efi_install_configuration_table(&smbios_guid,
map_sysmem(addr, 0));
}
static int install_smbios_table(void)
{
u64 addr;
efi_status_t ret;
if (!IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLE) || IS_ENABLED(CONFIG_X86))
return 0;
addr = SZ_4G;
ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
EFI_RUNTIME_SERVICES_DATA,
efi_size_in_pages(TABLE_SIZE), &addr);
if (ret != EFI_SUCCESS)
return log_msg_ret("mem", -ENOMEM);
addr = map_to_sysmem((void *)(uintptr_t)addr);
if (!write_smbios_table(addr)) {
log_err("Failed to write SMBIOS table\n");
return log_msg_ret("smbios", -EINVAL);
}
/* Make a note of where we put it */
log_debug("SMBIOS tables written to %llx\n", addr);
gd->arch.smbios_start = addr;
return 0;
}
EVENT_SPY_SIMPLE(EVT_LAST_STAGE_INIT, install_smbios_table);
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