diff options
Diffstat (limited to 'src/vendorcode/google/chromeos/vboot_helper.c')
-rw-r--r-- | src/vendorcode/google/chromeos/vboot_helper.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/vendorcode/google/chromeos/vboot_helper.c b/src/vendorcode/google/chromeos/vboot_helper.c new file mode 100644 index 0000000000..4fb3338b00 --- /dev/null +++ b/src/vendorcode/google/chromeos/vboot_helper.c @@ -0,0 +1,175 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stddef.h> +#include <string.h> +#include "chromeos.h" +#include <boot/coreboot_tables.h> +#include <cbfs.h> +#include <cbmem.h> +#include <console/console.h> +#include <program_loading.h> +#include "vboot_handoff.h" + +int vboot_enable_developer(void) +{ + struct vboot_handoff *vbho; + + vbho = cbmem_find(CBMEM_ID_VBOOT_HANDOFF); + + if (vbho == NULL) { + printk(BIOS_ERR, "%s: Couldn't find vboot_handoff structure!\n", + __func__); + return 0; + } + + return !!(vbho->init_params.out_flags & VB_INIT_OUT_ENABLE_DEVELOPER); +} + +int vboot_enable_recovery(void) +{ + struct vboot_handoff *vbho; + + vbho = cbmem_find(CBMEM_ID_VBOOT_HANDOFF); + + if (vbho == NULL) + return 0; + + return !!(vbho->init_params.out_flags & VB_INIT_OUT_ENABLE_RECOVERY); +} + +int __attribute__((weak)) clear_recovery_mode_switch(void) +{ + // Can be implemented by a mainboard + return 0; +} + +int vboot_skip_display_init(void) +{ + struct vboot_handoff *vbho; + + vbho = cbmem_find(CBMEM_ID_VBOOT_HANDOFF); + + if (vbho == NULL) + return 0; + + return !(vbho->init_params.out_flags & VB_INIT_OUT_ENABLE_DISPLAY); +} + +void *vboot_get_region(uintptr_t offset_addr, size_t size, void *dest) +{ + if (IS_ENABLED(CONFIG_SPI_FLASH_MEMORY_MAPPED)) { + if (dest != NULL) + return memcpy(dest, (void *)offset_addr, size); + else + return (void *)offset_addr; + } else { + struct cbfs_media default_media, *media = &default_media; + void *cache; + + init_default_cbfs_media(media); + media->open(media); + if (dest != NULL) { + cache = dest; + if (media->read(media, dest, offset_addr, size) != size) + cache = NULL; + } else { + cache = media->map(media, offset_addr, size); + if (cache == CBFS_MEDIA_INVALID_MAP_ADDRESS) + cache = NULL; + } + media->close(media); + return cache; + } +} + +int __attribute((weak)) vboot_get_sw_write_protect(void) +{ + // Can be implemented by a platform / mainboard + return 0; +} + +#if CONFIG_VBOOT2_VERIFY_FIRMWARE + +void *vboot_get_payload(int *len) { return NULL; } + +#else /* CONFIG_VBOOT2_VERIFY_FIRMWARE */ + +static void *vboot_get_payload(size_t *len) +{ + struct vboot_handoff *vboot_handoff; + struct firmware_component *fwc; + + vboot_handoff = cbmem_find(CBMEM_ID_VBOOT_HANDOFF); + + if (vboot_handoff == NULL) + return NULL; + + if (CONFIG_VBOOT_BOOT_LOADER_INDEX >= MAX_PARSED_FW_COMPONENTS) { + printk(BIOS_ERR, "Invalid boot loader index: %d\n", + CONFIG_VBOOT_BOOT_LOADER_INDEX); + return NULL; + } + + fwc = &vboot_handoff->components[CONFIG_VBOOT_BOOT_LOADER_INDEX]; + + if (len != NULL) + *len = fwc->size; + + printk(BIOS_DEBUG, "Booting 0x%x byte payload at 0x%08x.\n", + fwc->size, fwc->address); + + return (void *)fwc->address; +} +#endif + +static int vboot_locate_payload(struct payload *payload) +{ + void *buffer; + size_t size; + + buffer = vboot_get_payload(&size); + + if (buffer == NULL) + return -1; + + payload->backing_store.data = buffer; + payload->backing_store.size = size; + + return 0; +} + +const struct payload_loader_ops vboot_payload_loader = { + .name = "VBOOT", + .locate = vboot_locate_payload, +}; + +int vboot_get_handoff_info(void **addr, uint32_t *size) +{ + struct vboot_handoff *vboot_handoff; + + vboot_handoff = cbmem_find(CBMEM_ID_VBOOT_HANDOFF); + + if (vboot_handoff == NULL) + return -1; + + *addr = vboot_handoff; + *size = sizeof(*vboot_handoff); + return 0; +} |