forked from Mirrors/opensbi
040e4e2ec2
FDT helper file contain both fdt fixup and parsing functions. Split the fixup related functions to a separate file for a better code organization. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
|
|
/*
|
|
* fdt_fixup.h - Flat Device Tree manipulation helper routines
|
|
* Implement platform specific DT fixups on top of libfdt.
|
|
*
|
|
* Copyright (C) 2020 Bin Meng <bmeng.cn@gmail.com>
|
|
*/
|
|
|
|
#ifndef __FDT_FIXUP_H__
|
|
#define __FDT_FIXUP_H__
|
|
|
|
/**
|
|
* Fix up the CPU node in the device tree
|
|
*
|
|
* This routine updates the "status" property of a CPU node in the device tree
|
|
* to "disabled" if that hart is in disabled state in OpenSBI.
|
|
*
|
|
* It is recommended that platform codes call this helper in their final_init()
|
|
*
|
|
* @param fdt: device tree blob
|
|
*/
|
|
void fdt_cpu_fixup(void *fdt);
|
|
|
|
/**
|
|
* Fix up the PLIC node in the device tree
|
|
*
|
|
* This routine updates the "interrupt-extended" property of the PLIC node in
|
|
* the device tree to hide the M-mode external interrupt from CPUs.
|
|
*
|
|
* It is recommended that platform codes call this helper in their final_init()
|
|
*
|
|
* @param fdt: device tree blob
|
|
* @param compat: PLIC node compatible string
|
|
*/
|
|
void fdt_plic_fixup(void *fdt, const char *compat);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* General device tree fix-up
|
|
*
|
|
* This routine do all required device tree fix-ups for a typical platform.
|
|
* It fixes up the PLIC node and the reserved memory node in the device tree
|
|
* by calling the corresponding helper routines to accomplish the task.
|
|
*
|
|
* It is recommended that platform codes call this helper in their final_init()
|
|
*
|
|
* @param fdt: device tree blob
|
|
*/
|
|
void fdt_fixups(void *fdt);
|
|
|
|
#endif /* __FDT_FIXUP_H__ */
|
|
|