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lib: utils: Add a fdt_reserved_memory_fixup() helper

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Add a helper routine to insert a child node of the reserved memory
node in the device tree that describes the protected memory region
done by OpenSBI via PMP.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Bin Meng
2020-03-17 07:59:40 -07:00
committed by Anup Patel
parent dce88467af
commit fcb1dedb2d
3 changed files with 174 additions and 0 deletions
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25
include/sbi_utils/fdt/fdt_helper.h Normal file
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// SPDX-License-Identifier: BSD-2-Clause
/*
* fdt_helper.h - Flat Device Tree manipulation helper routines
* Implement helper routines on top of libfdt for OpenSBI usage
*
* Copyright (C) 2020 Bin Meng <bmeng.cn@gmail.com>
*/
#ifndef __FDT_HELPER_H__
#define __FDT_HELPER_H__
/**
* Fix up the reserved memory node in the device tree
*
* This routine inserts a child node of the reserved memory node in the device
* tree that describes the protected memory region done by OpenSBI via PMP.
*
* It is recommended that platform codes call this helper in their final_init()
*
* @param fdt: device tree blob
* @return zero on success and -ve on failure
*/
int fdt_reserved_memory_fixup(void *fdt);
#endif /* __FDT_HELPER_H__ */