linux/arch/mips/include/asm/yamon-dt.h
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   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Copyright (C) 2016 Imagination Technologies
   4 * Author: Paul Burton <paul.burton@mips.com>
   5 */
   6
   7#ifndef __MIPS_ASM_YAMON_DT_H__
   8#define __MIPS_ASM_YAMON_DT_H__
   9
  10#include <linux/types.h>
  11
  12/**
  13 * struct yamon_mem_region - Represents a contiguous range of physical RAM.
  14 * @start:      Start physical address.
  15 * @size:       Maximum size of region.
  16 * @discard:    Length of additional memory to discard after the region.
  17 */
  18struct yamon_mem_region {
  19        phys_addr_t     start;
  20        phys_addr_t     size;
  21        phys_addr_t     discard;
  22};
  23
  24/**
  25 * yamon_dt_append_cmdline() - Append YAMON-provided command line to /chosen
  26 * @fdt: the FDT blob
  27 *
  28 * Write the YAMON-provided command line to the bootargs property of the
  29 * /chosen node in @fdt.
  30 *
  31 * Return: 0 on success, else -errno
  32 */
  33extern __init int yamon_dt_append_cmdline(void *fdt);
  34
  35/**
  36 * yamon_dt_append_memory() - Append YAMON-provided memory info to /memory
  37 * @fdt:        the FDT blob
  38 * @regions:    zero size terminated array of physical memory regions
  39 *
  40 * Generate a /memory node in @fdt based upon memory size information provided
  41 * by YAMON in its environment and the @regions array.
  42 *
  43 * Return: 0 on success, else -errno
  44 */
  45extern __init int yamon_dt_append_memory(void *fdt,
  46                                        const struct yamon_mem_region *regions);
  47
  48/**
  49 * yamon_dt_serial_config() - Append YAMON-provided serial config to /chosen
  50 * @fdt: the FDT blob
  51 *
  52 * Generate a stdout-path property in the /chosen node of @fdt, based upon
  53 * information provided in the YAMON environment about the UART configuration
  54 * of the system.
  55 *
  56 * Return: 0 on success, else -errno
  57 */
  58extern __init int yamon_dt_serial_config(void *fdt);
  59
  60#endif /* __MIPS_ASM_YAMON_DT_H__ */
  61