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8e2ef4f7af
We should disable APLIC DT nodes in fdt_fixups() which are not accessible to the next booting stage based on currently assigned domain. Signed-off-by: Anup Patel <anup.patel@wdc.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Atish Patra <atishp@rivosinc.com>
103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
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/*
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* fdt_fixup.h - Flat Device Tree manipulation helper routines
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* Implement platform specific DT fixups on top of libfdt.
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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_FIXUP_H__
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#define __FDT_FIXUP_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 APLIC nodes in the device tree
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*
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* This routine disables APLIC nodes which are not accessible to the next
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* booting stage based on currently assigned domain.
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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_aplic_fixup(void *fdt);
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/**
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* Fix up the IMSIC nodes in the device tree
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*
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* This routine disables IMSIC nodes which are not accessible to the next
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* booting stage based on currently assigned domain.
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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_imsic_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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*/
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void fdt_plic_fixup(void *fdt);
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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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/**
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* Fix up the reserved memory subnodes in the device tree
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*
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* This routine adds the no-map property to the reserved memory subnodes so
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* that the OS does not map those PMP protected memory regions.
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*
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* Platform codes must call this helper in their final_init() after fdt_fixups()
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* if the OS should not map the PMP protected reserved regions.
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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_nomap_fixup(void *fdt);
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/**
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* General device tree fix-up
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*
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* This routine do all required device tree fix-ups for a typical platform.
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* It fixes up the PLIC node, IMSIC nodes, APLIC nodes, and the reserved
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* memory node in the device tree by calling the corresponding helper
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* routines to accomplish the task.
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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_fixups(void *fdt);
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#endif /* __FDT_FIXUP_H__ */
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