arch/mips/include/asm/yamon-dt.h

   1 /*
   2  * Copyright (C) 2016 Imagination Technologies
   3  * Author: Paul Burton <paul.burton@imgtec.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation;  either version 2 of the  License, or (at your
   8  * option) any later version.
   9  */
  10
  11 #ifndef __MIPS_ASM_YAMON_DT_H__
  12 #define __MIPS_ASM_YAMON_DT_H__
  13
  14 #include <linux/types.h>
  15
  16 /**
  17  * struct yamon_mem_region - Represents a contiguous range of physical RAM.
  18  * @start:      Start physical address.
  19  * @size:       Maximum size of region.
  20  * @discard:    Length of additional memory to discard after the region.
  21  */
  22 struct yamon_mem_region {
  23         phys_addr_t     start;
  24         phys_addr_t     size;
  25         phys_addr_t     discard;
  26 };
  27
  28 /**
  29  * yamon_dt_append_cmdline() - Append YAMON-provided command line to /chosen
  30  * @fdt: the FDT blob
  31  *
  32  * Write the YAMON-provided command line to the bootargs property of the
  33  * /chosen node in @fdt.
  34  *
  35  * Return: 0 on success, else -errno
  36  */
  37 extern __init int yamon_dt_append_cmdline(void *fdt);
  38
  39 /**
  40  * yamon_dt_append_memory() - Append YAMON-provided memory info to /memory
  41  * @fdt:        the FDT blob
  42  * @regions:    zero size terminated array of physical memory regions
  43  *
  44  * Generate a /memory node in @fdt based upon memory size information provided
  45  * by YAMON in its environment and the @regions array.
  46  *
  47  * Return: 0 on success, else -errno
  48  */
  49 extern __init int yamon_dt_append_memory(void *fdt,
  50                                         const struct yamon_mem_region *regions);
  51
  52 /**
  53  * yamon_dt_serial_config() - Append YAMON-provided serial config to /chosen
  54  * @fdt: the FDT blob
  55  *
  56  * Generate a stdout-path property in the /chosen node of @fdt, based upon
  57  * information provided in the YAMON environment about the UART configuration
  58  * of the system.
  59  *
  60  * Return: 0 on success, else -errno
  61  */
  62 extern __init int yamon_dt_serial_config(void *fdt);
  63
  64 #endif /* __MIPS_ASM_YAMON_DT_H__ */