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dd9439fbac
Add a helper routine to updates the "status" property of a CPU node in the device tree to "disabled" if that hart is in disabled state. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
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/*
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* fdt_helper.h - Flat Device Tree manipulation helper routines
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* Implement helper routines on top of libfdt for OpenSBI usage
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*
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* Copyright (C) 2020 Bin Meng <bmeng.cn@gmail.com>
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*/
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#ifndef __FDT_HELPER_H__
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#define __FDT_HELPER_H__
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/**
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* Fix up the CPU node in the device tree
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*
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* This routine updates the "status" property of a CPU node in the device tree
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* to "disabled" if that hart is in disabled state in OpenSBI.
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*
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* It is recommended that platform codes call this helper in their final_init()
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*
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* @param fdt: device tree blob
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*/
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void fdt_cpu_fixup(void *fdt);
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/**
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* Fix up the PLIC node in the device tree
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*
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* This routine updates the "interrupt-extended" property of the PLIC node in
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* the device tree to hide the M-mode external interrupt from CPUs.
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*
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* It is recommended that platform codes call this helper in their final_init()
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*
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* @param fdt: device tree blob
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* @param compat: PLIC node compatible string
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*/
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void fdt_plic_fixup(void *fdt, const char *compat);
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/**
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* Fix up the reserved memory node in the device tree
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*
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* This routine inserts a child node of the reserved memory node in the device
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* tree that describes the protected memory region done by OpenSBI via PMP.
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*
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* It is recommended that platform codes call this helper in their final_init()
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*
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* @param fdt: device tree blob
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* @return zero on success and -ve on failure
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*/
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int fdt_reserved_memory_fixup(void *fdt);
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#endif /* __FDT_HELPER_H__ */
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