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