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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi_gnvs.h>
#include <acpi/acpigen.h>
#include <bootstate.h>
#include <cbmem.h>
#include <console/console.h>
#include <soc/nvs.h>
#include <string.h>
#include <types.h>
static struct global_nvs *gnvs;
static void *dnvs;
static void acpi_create_gnvs(void *unused)
{
const size_t gnvs_size = ALIGN_UP(sizeof(struct global_nvs), sizeof(uint64_t));
const size_t dnvs_size = ALIGN_UP(size_of_dnvs(), sizeof(uint64_t));
gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
if (gnvs)
return;
/* Allocate for both GNVS and DNVS OpRegions. */
gnvs = cbmem_add(CBMEM_ID_ACPI_GNVS, gnvs_size + dnvs_size);
if (!gnvs)
return;
memset(gnvs, 0, gnvs_size + dnvs_size);
if (dnvs_size)
dnvs = (char *)gnvs + gnvs_size;
}
BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_EXIT, acpi_create_gnvs, NULL);
void *acpi_get_gnvs(void)
{
if (gnvs)
return gnvs;
gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
if (gnvs)
return gnvs;
printk(BIOS_ERR, "Unable to locate Global NVS\n");
return NULL;
}
void *acpi_get_device_nvs(void)
{
return dnvs;
}
/* Implemented under platform. */
__weak void soc_fill_gnvs(struct global_nvs *gnvs_) { }
__weak void mainboard_fill_gnvs(struct global_nvs *gnvs_) { }
__weak size_t size_of_dnvs(void) { return 0; }
/* Called from write_acpi_tables() only on normal boot path. */
void acpi_fill_gnvs(void)
{
const struct opregion gnvs_op = OPREGION("GNVS", SYSTEMMEMORY, (uintptr_t)gnvs,
sizeof(struct global_nvs));
const struct opregion dnvs_op = OPREGION("DNVS", SYSTEMMEMORY, (uintptr_t)dnvs,
size_of_dnvs());
if (!gnvs)
return;
soc_fill_gnvs(gnvs);
mainboard_fill_gnvs(gnvs);
acpigen_write_scope("\\");
acpigen_write_opregion(&gnvs_op);
if (dnvs)
acpigen_write_opregion(&dnvs_op);
acpigen_pop_len();
}
int acpi_reset_gnvs_for_wake(struct global_nvs **gnvs_)
{
if (!gnvs)
return -1;
/* Set unknown wake source */
gnvs->pm1i = -1;
gnvs->gpei = -1;
*gnvs_ = gnvs;
return 0;
}
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