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b7d1f03e36
Kernel preamble flags are set by the signer for passing hints about the image. Read these flags from the preamble and pass it back to the caller in kparams structure. BUG=chrome-os-partner:35861 BRANCH=None TEST=Compiles and boots to kernel prompt for both CrOS image and bootimg. Change-Id: I07a8b974dcf3ab5cd93d26a752c989d268c8da99 Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://chromium-review.googlesource.com/245951 Reviewed-by: Bill Richardson <wfrichar@chromium.org> Tested-by: Furquan Shaikh <furquan@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org> Commit-Queue: Furquan Shaikh <furquan@chromium.org>
107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* High-level firmware API for loading and verifying kernel.
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* (Firmware Portion)
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*/
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#ifndef VBOOT_REFERENCE_LOAD_KERNEL_FW_H_
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#define VBOOT_REFERENCE_LOAD_KERNEL_FW_H_
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#include "vboot_api.h"
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#include "vboot_nvstorage.h"
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/* Interface provided by verified boot library to BDS */
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/* Boot flags for LoadKernel().boot_flags */
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/* Developer switch is on */
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#define BOOT_FLAG_DEVELOPER (0x01ULL)
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/* In recovery mode */
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#define BOOT_FLAG_RECOVERY (0x02ULL)
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/* GPT is external */
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#define BOOT_FLAG_EXTERNAL_GPT (0x04ULL)
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typedef struct LoadKernelParams {
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/* Inputs to LoadKernel() */
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/*
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* Buffer for data shared between LoadFirmware() and LoadKernel().
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* Pass the same buffer which was passed to LoadFirmware().
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*/
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void *shared_data_blob;
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/*
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* Size of shared data blob buffer, in bytes. On output, this will
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* contain the actual data size placed into the buffer.
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*/
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uint64_t shared_data_size;
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/* Pointer to GBB data */
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void *gbb_data;
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/* Size of GBB data in bytes */
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uint64_t gbb_size;
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/* Disk handle for current device */
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VbExDiskHandle_t disk_handle;
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/* Bytes per lba sector on current device */
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uint64_t bytes_per_lba;
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/* Number of LBA-addressable sectors on the main device */
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uint64_t streaming_lba_count;
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/* Random-access GPT size */
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uint64_t gpt_lba_count;
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/* Destination buffer for kernel (normally at 0x100000) */
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void *kernel_buffer;
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/* Size of kernel buffer in bytes */
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uint64_t kernel_buffer_size;
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/* Boot flags */
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uint64_t boot_flags;
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/*
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* Context for NV storage. Caller is responsible for calling
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* VbNvSetup() and VbNvTeardown() on the context.
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*/
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VbNvContext *nv_context;
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/*
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* Outputs from LoadKernel(); valid only if LoadKernel() returns
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* LOAD_KERNEL_SUCCESS
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*/
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/* Partition number to boot on current device (1...M) */
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uint64_t partition_number;
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/* Address of bootloader image in RAM */
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uint64_t bootloader_address;
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/* Size of bootloader image in bytes */
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uint64_t bootloader_size;
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/* UniquePartitionGuid for boot partition */
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uint8_t partition_guid[16];
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/* Flags passed in by signer */
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uint32_t flags;
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} LoadKernelParams;
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/**
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* Attempt to load the kernel from the current device.
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*
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* Returns VBERROR_SUCCESS if successful. If unsuccessful, sets a recovery
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* reason via VbNvStorage and returns an error code.
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*/
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VbError_t LoadKernel(LoadKernelParams *params, VbCommonParams *cparams);
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/*
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* The bootloader is loaded using the EFI LoadImage() and StartImage() calls.
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* Pass this struct via loaded_image->load_options.
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*/
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typedef struct KernelBootloaderOptions {
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/* Drive number of boot device (0...N) */
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uint64_t drive_number;
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/*
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* Partition number, as returned from LoadKernel() in
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* LoadKernelParams.partition_number
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*/
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uint64_t partition_number;
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/*
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* Absolute bootloader start adddress, as returned from LoadKernel() in
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* LoadKernelParams.bootloader_start
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*/
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uint64_t original_address;
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/* UniquePartitionGuid for boot partition */
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uint8_t partition_guid[16];
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} KernelBootloaderOptions;
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#endif /* VBOOT_REFERENCE_LOAD_KERNEL_FW_H_ */
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