/* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpi.h> #include <acpi/acpigen.h> #include <bootstate.h> #include <types.h> #include <string.h> #include <stdlib.h> #include <cbfs.h> #include <cbmem.h> #include <console/console.h> #include <ec/google/chromeec/ec.h> #include <fmap.h> #include <security/vboot/vbnv.h> #include <security/vboot/vboot_common.h> #include <smbios.h> #include "chromeos.h" #include "gnvs.h" static struct chromeos_acpi *chromeos_acpi; static size_t chromeos_vpd_region(const char *region, uintptr_t *base) { struct region_device vpd; if (fmap_locate_area_as_rdev(region, &vpd)) return 0; *base = (uintptr_t)rdev_mmap_full(&vpd); return region_device_sz(&vpd); } static void chromeos_init_chromeos_acpi(void *unused) { size_t vpd_size; uintptr_t vpd_base = 0; chromeos_acpi = cbmem_add(CBMEM_ID_ACPI_CNVS, sizeof(struct chromeos_acpi)); if (!chromeos_acpi) return; /* Retain CNVS contents on S3 resume path. */ if (acpi_is_wakeup_s3()) return; vpd_size = chromeos_vpd_region("RO_VPD", &vpd_base); if (vpd_size && vpd_base) { chromeos_acpi->vpd_ro_base = vpd_base; chromeos_acpi->vpd_ro_size = vpd_size; } vpd_size = chromeos_vpd_region("RW_VPD", &vpd_base); if (vpd_size && vpd_base) { chromeos_acpi->vpd_rw_base = vpd_base; chromeos_acpi->vpd_rw_size = vpd_size; } } BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_EXIT, chromeos_init_chromeos_acpi, NULL); void chromeos_set_me_hash(u32 *hash, int len) { if ((len*sizeof(u32)) > sizeof(chromeos_acpi->mehh)) return; /* Copy to NVS. */ if (chromeos_acpi) memcpy(chromeos_acpi->mehh, hash, len*sizeof(u32)); } void chromeos_set_ramoops(void *ram_oops, size_t size) { if (!chromeos_acpi) return; printk(BIOS_DEBUG, "Ramoops buffer: 0x%zx@%p.\n", size, ram_oops); chromeos_acpi->ramoops_base = (uintptr_t)ram_oops; chromeos_acpi->ramoops_len = size; } void smbios_type0_bios_version(uintptr_t address) { if (!chromeos_acpi) return; /* Location of smbios_type0.bios_version() string filled with spaces. */ chromeos_acpi->vbt10 = address; } void acpi_fill_cnvs(void) { const struct opregion cnvs_op = OPREGION("CNVS", SYSTEMMEMORY, (uintptr_t)chromeos_acpi, sizeof(*chromeos_acpi)); if (!chromeos_acpi) return; acpigen_write_scope("\\"); acpigen_write_opregion(&cnvs_op); acpigen_pop_len(); chromeos_acpi_gpio_generate(); }