diff options
Diffstat (limited to 'src/vendorcode/google/chromeos/vboot2/common.c')
| -rw-r--r-- | src/vendorcode/google/chromeos/vboot2/common.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/src/vendorcode/google/chromeos/vboot2/common.c b/src/vendorcode/google/chromeos/vboot2/common.c deleted file mode 100644 index 58ea95d219..0000000000 --- a/src/vendorcode/google/chromeos/vboot2/common.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2014 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. - */ - -#include <assert.h> -#include <cbfs.h> -#include <cbmem.h> -#include <console/console.h> -#include <reset.h> -#include <string.h> -#include <vb2_api.h> -#include "../chromeos.h" -#include "../symbols.h" -#include "../vboot_common.h" -#include "misc.h" - -struct selected_region { - uint32_t offset; - uint32_t size; -}; - -/* - * this is placed at the start of the vboot work buffer. selected_region is used - * for the verstage to return the location of the selected slot. buffer is used - * by the vboot2 core. Keep the struct cpu architecture agnostic as it crosses - * stage boundaries. - */ -struct vb2_working_data { - struct selected_region selected_region; - /* offset of the buffer from the start of this struct */ - uint32_t buffer_offset; - uint32_t buffer_size; -}; - -static const size_t vb_work_buf_size = 16 * KiB; - -static struct vb2_working_data * const vboot_get_working_data(void) -{ - if (IS_ENABLED(CONFIG_VBOOT_DYNAMIC_WORK_BUFFER)) - /* cbmem_add() does a cbmem_find() first. */ - return cbmem_add(CBMEM_ID_VBOOT_WORKBUF, vb_work_buf_size); - else - return (struct vb2_working_data *)_vboot2_work; -} - -static size_t vb2_working_data_size(void) -{ - if (IS_ENABLED(CONFIG_VBOOT_DYNAMIC_WORK_BUFFER)) - return vb_work_buf_size; - else - return _vboot2_work_size; -} - -static struct selected_region *vb2_selected_region(void) -{ - struct selected_region *sel_reg = NULL; - - /* Ramstage and postcar always uses cbmem as a source of truth. */ - if (ENV_RAMSTAGE || ENV_POSTCAR) - sel_reg = cbmem_find(CBMEM_ID_VBOOT_SEL_REG); - else if (ENV_ROMSTAGE) { - /* Try cbmem first. Fall back on working data if not found. */ - sel_reg = cbmem_find(CBMEM_ID_VBOOT_SEL_REG); - - if (sel_reg == NULL) { - struct vb2_working_data *wd = vboot_get_working_data(); - sel_reg = &wd->selected_region; - } - } else { - /* Stages such as bootblock and verstage use working data. */ - struct vb2_working_data *wd = vboot_get_working_data(); - sel_reg = &wd->selected_region; - } - - return sel_reg; -} - -void vb2_init_work_context(struct vb2_context *ctx) -{ - struct vb2_working_data *wd; - size_t work_size; - - /* First initialize the working data region. */ - work_size = vb2_working_data_size(); - wd = vboot_get_working_data(); - memset(wd, 0, work_size); - - /* - * vboot prefers 16-byte alignment. This takes away 16 bytes - * from the VBOOT2_WORK region, but the vboot devs said that's okay. - */ - wd->buffer_offset = ALIGN_UP(sizeof(*wd), 16); - wd->buffer_size = work_size - wd->buffer_offset; - - /* Initialize the vb2_context. */ - memset(ctx, 0, sizeof(*ctx)); - ctx->workbuf = (void *)vb2_get_shared_data(); - ctx->workbuf_size = wd->buffer_size; - -} - -struct vb2_shared_data *vb2_get_shared_data(void) -{ - struct vb2_working_data *wd = vboot_get_working_data(); - return (void *)((uintptr_t)wd + wd->buffer_offset); -} - -int vb2_get_selected_region(struct region *region) -{ - const struct selected_region *reg = vb2_selected_region(); - - if (reg == NULL) - return -1; - - if (reg->offset == 0 && reg->size == 0) - return -1; - - region->offset = reg->offset; - region->size = reg->size; - - return 0; -} - -void vb2_set_selected_region(const struct region *region) -{ - struct selected_region *reg = vb2_selected_region(); - - assert(reg != NULL); - - reg->offset = region_offset(region); - reg->size = region_sz(region); -} - -int vb2_is_slot_selected(void) -{ - const struct selected_region *reg = vb2_selected_region(); - - assert(reg != NULL); - - return reg->size > 0; -} - -void vb2_store_selected_region(void) -{ - const struct vb2_working_data *wd; - struct selected_region *sel_reg; - - /* Always use the working data in this path since it's the object - * which has the result.. */ - wd = vboot_get_working_data(); - - sel_reg = cbmem_add(CBMEM_ID_VBOOT_SEL_REG, sizeof(*sel_reg)); - - assert(sel_reg != NULL); - - sel_reg->offset = wd->selected_region.offset; - sel_reg->size = wd->selected_region.size; -} - -/* - * For platforms that employ VBOOT_DYNAMIC_WORK_BUFFER, the vboot - * verification doesn't happen until after cbmem is brought online. - * Therefore, the selected region contents would not be initialized - * so don't automatically add results when cbmem comes online. - */ -#if !IS_ENABLED(CONFIG_VBOOT_DYNAMIC_WORK_BUFFER) -static void vb2_store_selected_region_cbmem(int unused) -{ - vb2_store_selected_region(); -} -ROMSTAGE_CBMEM_INIT_HOOK(vb2_store_selected_region_cbmem) -#endif |