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Linux_SDK_V0.9.5
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thead_admin
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// SPDX-License-Identifier: BSD-2-Clause
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/*
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* fdt_domain.c - Flat Device Tree Domain helper routines
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*
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* Copyright (c) 2020 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#ifndef __FDT_DOMAIN_H__
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#define __FDT_DOMAIN_H__
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#include <sbi/sbi_types.h>
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struct sbi_domain;
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/**
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* Iterate over each domains in device tree
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*
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* @param fdt device tree blob
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* @param opaque private pointer for each iteration
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* @param fn callback function for each iteration
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*
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* @return 0 on success and negative error code on failure
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*/
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int fdt_iterate_each_domain(void *fdt, void *opaque,
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int (*fn)(void *fdt, int domain_offset,
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void *opaque));
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/**
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* Iterate over each memregion of a domain in device tree
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*
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* @param fdt device tree blob
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* @param domain_offset domain DT node offset
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* @param opaque private pointer for each iteration
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* @param fn callback function for each iteration
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*
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* @return 0 on success and negative error code on failure
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*/
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int fdt_iterate_each_memregion(void *fdt, int domain_offset, void *opaque,
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int (*fn)(void *fdt, int domain_offset,
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int region_offset, u32 region_access,
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void *opaque));
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/**
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* Fix up the domain configuration in the device tree
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*
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* This routine:
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* 1. Disables MMIO devices not accessible to the coldboot HART domain
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* 2. Removes "opensbi-domain" DT property from CPU DT nodes
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* 3. Removes domain configuration DT node under /chosen DT node
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*
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* It is recommended that platform support call this function in
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* their final_init() platform operation.
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*
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* @param fdt device tree blob
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*/
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void fdt_domain_fixup(void *fdt);
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/**
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* Populate domains from device tree
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*
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* It is recommended that platform support call this function in
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* their domains_init() platform operation.
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*
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* @param fdt device tree blob
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*
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* @return 0 on success and negative error code on failure
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*/
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int fdt_domains_populate(void *fdt);
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#endif /* __FDT_DOMAIN_H__ */
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// 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 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 and the reserved memory node in the device tree
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* by calling the corresponding helper 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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@@ -0,0 +1,68 @@
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// SPDX-License-Identifier: BSD-2-Clause
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/*
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* fdt_helper.h - Flat Device Tree parsing helper routines
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* Implement helper routines to parse FDT nodes on top of
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* 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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#include <sbi/sbi_types.h>
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struct fdt_match {
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const char *compatible;
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void *data;
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};
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struct platform_uart_data {
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unsigned long addr;
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unsigned long freq;
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unsigned long baud;
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unsigned long reg_shift;
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unsigned long reg_io_width;
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};
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const struct fdt_match *fdt_match_node(void *fdt, int nodeoff,
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const struct fdt_match *match_table);
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int fdt_find_match(void *fdt, int startoff,
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const struct fdt_match *match_table,
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const struct fdt_match **out_match);
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int fdt_get_node_addr_size(void *fdt, int node, unsigned long *addr,
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unsigned long *size);
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int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid);
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int fdt_parse_max_hart_id(void *fdt, u32 *max_hartid);
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int fdt_parse_shakti_uart_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_sifive_uart_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_uart8250_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_uart8250(void *fdt, struct platform_uart_data *uart,
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const char *compatible);
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struct plic_data;
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int fdt_parse_plic_node(void *fdt, int nodeoffset, struct plic_data *plic);
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int fdt_parse_plic(void *fdt, struct plic_data *plic, const char *compat);
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struct clint_data;
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int fdt_parse_clint_node(void *fdt, int nodeoffset, bool for_timer,
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struct clint_data *clint);
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int fdt_parse_compat_addr(void *fdt, unsigned long *addr,
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const char *compatible);
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#endif /* __FDT_HELPER_H__ */
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