61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2016 Imagination Technologies
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* Author: Paul Burton <paul.burton@mips.com>
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*/
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#ifndef __MIPS_ASM_YAMON_DT_H__
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#define __MIPS_ASM_YAMON_DT_H__
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#include <linux/types.h>
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/**
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* struct yamon_mem_region - Represents a contiguous range of physical RAM.
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* @start: Start physical address.
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* @size: Maximum size of region.
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* @discard: Length of additional memory to discard after the region.
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*/
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struct yamon_mem_region {
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phys_addr_t start;
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phys_addr_t size;
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phys_addr_t discard;
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};
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/**
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* yamon_dt_append_cmdline() - Append YAMON-provided command line to /chosen
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* @fdt: the FDT blob
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*
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* Write the YAMON-provided command line to the bootargs property of the
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* /chosen node in @fdt.
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*
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* Return: 0 on success, else -errno
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*/
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extern __init int yamon_dt_append_cmdline(void *fdt);
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/**
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* yamon_dt_append_memory() - Append YAMON-provided memory info to /memory
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* @fdt: the FDT blob
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* @regions: zero size terminated array of physical memory regions
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*
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* Generate a /memory node in @fdt based upon memory size information provided
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* by YAMON in its environment and the @regions array.
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*
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* Return: 0 on success, else -errno
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*/
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extern __init int yamon_dt_append_memory(void *fdt,
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const struct yamon_mem_region *regions);
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/**
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* yamon_dt_serial_config() - Append YAMON-provided serial config to /chosen
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* @fdt: the FDT blob
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*
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* Generate a stdout-path property in the /chosen node of @fdt, based upon
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* information provided in the YAMON environment about the UART configuration
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* of the system.
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*
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* Return: 0 on success, else -errno
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*/
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extern __init int yamon_dt_serial_config(void *fdt);
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#endif /* __MIPS_ASM_YAMON_DT_H__ */
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