/* 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; }