kernel/arch/mips/xilfpga/init.c

   1 /*
   2  * Xilfpga platform setup
   3  *
   4  * Copyright (C) 2015 Imagination Technologies
   5  * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms and conditions of the GNU General Public License,
   9  * version 2, as published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/of_fdt.h>
  13 #include <linux/of_platform.h>
  14
  15 #include <asm/prom.h>
  16
  17 #define XILFPGA_UART_BASE       0xb0401000
  18
  19 const char *get_system_type(void)
  20 {
  21         return "MIPSfpga";
  22 }
  23
  24 void __init plat_mem_setup(void)
  25 {
  26         __dt_setup_arch(__dtb_start);
  27         strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
  28 }
  29
  30 void __init prom_init(void)
  31 {
  32         setup_8250_early_printk_port(XILFPGA_UART_BASE, 2, 50000);
  33 }
  34
  35 void __init prom_free_prom_memory(void)
  36 {
  37 }
  38
  39 void __init device_tree_init(void)
  40 {
  41         if (!initial_boot_params)
  42                 return;
  43
  44         unflatten_and_copy_device_tree();
  45 }
  46
  47 static int __init plat_of_setup(void)
  48 {
  49         if (!of_have_populated_dt())
  50                 panic("Device tree not present");
  51
  52         if (of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL))
  53                 panic("Failed to populate DT");
  54
  55         return 0;
  56 }
  57 arch_initcall(plat_of_setup);