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/* Copyright 2020 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/*
* Routines for accessing data objects store in the .init_rom region.
* Enabled with the CONFIG_CHIP_INIT_ROM_REGION config option. Data
* objects are placed into the .init_rom region using the __init_rom attribute.
*/
#ifndef __CROS_EC_INIT_ROM_H
#define __CROS_EC_INIT_ROM_H
#include "stdbool.h"
/**
* Get the memory mapped address of an .init_rom data object.
*
* @param offset Address of the data object assigned by the linker.
* This is effectively a flash offset when
* CONFIG_CHIP_INIT_ROM_REGION is enabled, otherwise
* it is a regular address.
* @param size Size of the data object.
*
* @return Pointer to data object in memory. Return NULL if the object
* is not memory mapped.
*/
#ifdef CONFIG_CHIP_INIT_ROM_REGION
const void *init_rom_map(const void *addr, int size);
#else
static inline const void *init_rom_map(const void *addr, int size)
{
return addr;
}
#endif
/**
* Unmaps an .init_rom data object. Must be called when init_rom_map() is
* successful.
*
* @param offset Address of the data object assigned by the linker.
* @param size Size of the data object.
*/
#ifdef CONFIG_CHIP_INIT_ROM_REGION
void init_rom_unmap(const void *addr, int size);
#else
static inline void init_rom_unmap(const void *addr, int size)
{
}
#endif
/**
* Copy an .init_rom data object into a RAM location. This routine must be used
* if init_rom_get_addr() returns NULL. This routine automatically handles
* locking of the flash.
*
* @param offset Flash offset of the data object.
* @param size Size of the data object.
* @param data Destination buffer for data.
*
* @return 0 on success.
*/
#ifdef CONFIG_CHIP_INIT_ROM_REGION
int init_rom_copy(int offset, int size, char *data);
#else
static inline int init_rom_copy(int offset, int size, char *data)
{
return 0;
}
#endif
#endif /* __CROS_EC_INIT_ROM_H */
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