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

   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  */
  18 struct 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  */
  33 extern __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  */
  45 extern __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  */
  58 extern __init int yamon_dt_serial_config(void *fdt);
  59
  60 #endif /* __MIPS_ASM_YAMON_DT_H__ */