target/linux/ramips/files/arch/mips/ralink/common/setup.c

   1 /*
   2  * Ralink SoC common setup
   3  *
   4  * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
   5  * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published
   9  * by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/io.h>
  15
  16 #include <asm/bootinfo.h>
  17 #include <asm/addrspace.h>
  18
  19 #include <asm/mach-ralink/common.h>
  20 #include <ralink_soc.h>
  21
  22 static void __init detect_mem_size(void)
  23 {
  24         unsigned long size;
  25
  26         for (size = RALINK_SOC_MEM_SIZE_MIN; size < RALINK_SOC_MEM_SIZE_MAX;
  27              size <<= 1 ) {
  28                 if (!memcmp(detect_mem_size,
  29                             detect_mem_size + size, 1024))
  30                         break;
  31         }
  32
  33         add_memory_region(RALINK_SOC_SDRAM_BASE, size, BOOT_MEM_RAM);
  34 }
  35
  36 void __init plat_mem_setup(void)
  37 {
  38         set_io_port_base(KSEG1);
  39
  40         detect_mem_size();
  41         ramips_soc_setup();
  42 }