| /* 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(); |
| } |