diff options
Diffstat (limited to 'src/vendorcode/google/chromeos/vboot2/vboot_handoff.c')
| -rw-r--r-- | src/vendorcode/google/chromeos/vboot2/vboot_handoff.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c b/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c new file mode 100644 index 0000000000..a8573d0c88 --- /dev/null +++ b/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c @@ -0,0 +1,175 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google, Inc. + * + * 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 <2recovery_reasons.h> +#include <2struct.h> +#include <arch/stages.h> +#include <assert.h> +#include <stdint.h> +#include <stddef.h> +#include <string.h> +#include <cbfs.h> +#include <cbmem.h> +#include <console/console.h> +#include <console/vtxprintf.h> +#include <stdlib.h> +#include <timestamp.h> +#include <vboot_struct.h> +#include "../chromeos.h" +#include "../fmap.h" +#include "../vboot_handoff.h" +#include "misc.h" + +static void *load_ramstage(struct vboot_handoff *vboot_handoff, + struct vboot_region *fw_main) +{ + struct vboot_components *fw_info; + int i; + + fw_info = vboot_locate_components(fw_main); + if (fw_info == NULL) + die("failed to locate firmware components\n"); + + /* these offset & size are used to load a rw boot loader */ + for (i = 0; i < fw_info->num_components; i++) { + vboot_handoff->components[i].address = + fw_main->offset_addr + fw_info->entries[i].offset; + vboot_handoff->components[i].size = fw_info->entries[i].size; + } + + return vboot_load_stage(CONFIG_VBOOT_RAMSTAGE_INDEX, fw_main, fw_info); +} + +/** + * Sets vboot_handoff based on the information in vb2_shared_data + * + * TODO: Read wp switch to set VBSD_BOOT_FIRMWARE_WP_ENABLED + */ +static void fill_vboot_handoff(struct vboot_handoff *vboot_handoff, + struct vb2_shared_data *vb2_sd) +{ + VbSharedDataHeader *vb_sd = + (VbSharedDataHeader *)vboot_handoff->shared_data; + uint32_t *oflags = &vboot_handoff->init_params.out_flags; + + vb_sd->flags |= VBSD_BOOT_FIRMWARE_VBOOT2; + + vboot_handoff->selected_firmware = vb2_sd->fw_slot; + + vb_sd->firmware_index = vb2_sd->fw_slot; + + vb_sd->magic = VB_SHARED_DATA_MAGIC; + vb_sd->struct_version = VB_SHARED_DATA_VERSION; + vb_sd->struct_size = sizeof(VbSharedDataHeader); + vb_sd->data_size = VB_SHARED_DATA_MIN_SIZE; + vb_sd->data_used = sizeof(VbSharedDataHeader); + + if (vb2_sd->recovery_reason) { + vb_sd->firmware_index = 0xFF; + if (vb2_sd->recovery_reason == VB2_RECOVERY_RO_MANUAL) + vb_sd->flags |= VBSD_BOOT_REC_SWITCH_ON; + *oflags |= VB_INIT_OUT_ENABLE_RECOVERY; + *oflags |= VB_INIT_OUT_CLEAR_RAM; + *oflags |= VB_INIT_OUT_ENABLE_DISPLAY; + *oflags |= VB_INIT_OUT_ENABLE_USB_STORAGE; + } + if (vb2_sd->flags & VB2_SD_DEV_MODE_ENABLED) { + *oflags |= VB_INIT_OUT_ENABLE_DEVELOPER; + *oflags |= VB_INIT_OUT_CLEAR_RAM; + *oflags |= VB_INIT_OUT_ENABLE_DISPLAY; + *oflags |= VB_INIT_OUT_ENABLE_USB_STORAGE; + vb_sd->flags |= VBSD_BOOT_DEV_SWITCH_ON; + vb_sd->flags |= VBSD_LF_DEV_SWITCH_ON; + } + /* TODO: Set these in depthcharge */ + if (CONFIG_VIRTUAL_DEV_SWITCH) + vb_sd->flags |= VBSD_HONOR_VIRT_DEV_SWITCH; + if (CONFIG_EC_SOFTWARE_SYNC) { + vb_sd->flags |= VBSD_EC_SOFTWARE_SYNC; + vb_sd->flags |= VBSD_BOOT_REC_SWITCH_VIRTUAL; + } + /* In vboot1, VBSD_FWB_TRIED is + * set only if B is booted as explicitly requested. Therefore, if B is + * booted because A was found bad, the flag should not be set. It's + * better not to touch it if we can only ambiguously control it. */ + /* if (vb2_sd->fw_slot) + vb_sd->flags |= VBSD_FWB_TRIED; */ + + /* copy kernel subkey if it's found */ + if (vb2_sd->workbuf_preamble_size) { + struct vb2_fw_preamble *fp; + uintptr_t dst, src; + printk(BIOS_INFO, "Copying FW preamble\n"); + fp = (struct vb2_fw_preamble *)((uintptr_t)vb2_sd + + vb2_sd->workbuf_preamble_offset); + src = (uintptr_t)&fp->kernel_subkey + + fp->kernel_subkey.key_offset; + dst = (uintptr_t)vb_sd + sizeof(VbSharedDataHeader); + assert(dst + fp->kernel_subkey.key_size <= + (uintptr_t)vboot_handoff + sizeof(*vboot_handoff)); + memcpy((void *)dst, (void *)src, + fp->kernel_subkey.key_size); + vb_sd->data_used += fp->kernel_subkey.key_size; + vb_sd->kernel_subkey.key_offset = + dst - (uintptr_t)&vb_sd->kernel_subkey; + vb_sd->kernel_subkey.key_size = fp->kernel_subkey.key_size; + vb_sd->kernel_subkey.algorithm = fp->kernel_subkey.algorithm; + vb_sd->kernel_subkey.key_version = + fp->kernel_subkey.key_version; + } + + vb_sd->recovery_reason = vb2_sd->recovery_reason; +} + +/** + * Load ramstage and return the entry point + */ +void *vboot2_load_ramstage(void) +{ + struct vboot_handoff *vh; + struct vb2_shared_data *sd; + struct vboot_region fw_main; + struct vb2_working_data *wd = vboot_get_working_data(); + + sd = (struct vb2_shared_data *)(uintptr_t)wd->buffer; + sd->workbuf_hash_offset = 0; + sd->workbuf_hash_size = 0; + + printk(BIOS_INFO, "creating vboot_handoff structure\n"); + vh = cbmem_add(CBMEM_ID_VBOOT_HANDOFF, sizeof(*vh)); + if (vh == NULL) + /* we don't need to failover gracefully here because this + * shouldn't happen with the image that has passed QA. */ + die("failed to allocate vboot_handoff structure\n"); + + memset(vh, 0, sizeof(*vh)); + + /* needed until we finish transtion to vboot2 for kernel verification */ + fill_vboot_handoff(vh, sd); + + if (vboot_is_readonly_path(wd)) + /* we're on recovery path. continue to ro-ramstage. */ + return NULL; + + printk(BIOS_INFO, + "loading ramstage from Slot %c\n", sd->fw_slot ? 'B' : 'A'); + vb2_get_selected_region(wd, &fw_main); + + return load_ramstage(vh, &fw_main); +} |