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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef LIBXBC_H_
#define LIBXBC_H_
// memcpy and strncmp
#include <common.h>
/*
* Add a string of boot config parameters to memory appended by the trailer.
* This memory needs to be immediately following the end of the ramdisks.
* The new boot config trailer will be written to the end of the entire
* parameter section(previous + new). The trailer contains a 4 byte size of the
* parameters, followed by a 4 byte checksum of the parameters, followed by a 12
* byte magic string.
*
* @param params pointer to string of boot config parameters
* @param params_size size of params string in bytes
* @param bootconfig_start_addr address that the boot config section is starting
* at in memory.
* @param bootconfig_size size of the current bootconfig section in bytes.
* @return number of bytes added to the boot config section. -1 for error.
*/
int addBootConfigParameters(char *params, uint32_t params_size,
uint64_t bootconfig_start_addr,
uint32_t bootconfig_size);
/*
* Add the boot config trailer to the end of the boot config parameter section.
* This can be used after the vendor bootconfig section has been placed into
* memory if there are no additional parameters that need to be added.
* The new boot config trailer will be written to the end of the entire
* parameter section at (bootconfig_start_addr + bootconfig_size).
* The trailer contains a 4 byte size of the parameters, followed by a 4 byte
* checksum of the parameters, followed by a 12 byte magic string.
*
* @param bootconfig_start_addr address that the boot config section is starting
* at in memory.
* @param bootconfig_size size of the current bootconfig section in bytes.
* @return number of bytes added to the boot config section. -1 for error.
*/
int addBootConfigTrailer(uint64_t bootconfig_start_addr,
uint32_t bootconfig_size);
#endif /* LIBXBC_H_ */
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