arch/mips/lantiq/setup.c

   1 /*
   2  *  This program is free software; you can redistribute it and/or modify it
   3  *  under the terms of the GNU General Public License version 2 as published
   4  *  by the Free Software Foundation.
   5  *
   6  * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/export.h>
  11 #include <linux/io.h>
  12 #include <linux/ioport.h>
  13 #include <asm/bootinfo.h>
  14
  15 #include <lantiq_soc.h>
  16
  17 #include "machtypes.h"
  18 #include "devices.h"
  19 #include "prom.h"
  20
  21 void __init plat_mem_setup(void)
  22 {
  23         /* assume 16M as default incase uboot fails to pass proper ramsize */
  24         unsigned long memsize = 16;
  25         char **envp = (char **) KSEG1ADDR(fw_arg2);
  26
  27         ioport_resource.start = IOPORT_RESOURCE_START;
  28         ioport_resource.end = IOPORT_RESOURCE_END;
  29         iomem_resource.start = IOMEM_RESOURCE_START;
  30         iomem_resource.end = IOMEM_RESOURCE_END;
  31
  32         set_io_port_base((unsigned long) KSEG1);
  33
  34         while (*envp) {
  35                 char *e = (char *)KSEG1ADDR(*envp);
  36                 if (!strncmp(e, "memsize=", 8)) {
  37                         e += 8;
  38                         if (strict_strtoul(e, 0, &memsize))
  39                                 pr_warn("bad memsize specified\n");
  40                 }
  41                 envp++;
  42         }
  43         memsize *= 1024 * 1024;
  44         add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
  45 }
  46
  47 static int __init
  48 lantiq_setup(void)
  49 {
  50         ltq_soc_setup();
  51         mips_machine_setup();
  52         return 0;
  53 }
  54
  55 arch_initcall(lantiq_setup);
  56
  57 static void __init
  58 lantiq_generic_init(void)
  59 {
  60         /* Nothing to do */
  61 }
  62
  63 MIPS_MACHINE(LTQ_MACH_GENERIC,
  64              "Generic",
  65              "Generic Lantiq based board",
  66              lantiq_generic_init);