board/raspberrypi/rpi_b/rpi_b.c

   1 /*
   2  * (C) Copyright 2012 Stephen Warren
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <common.h>
  18 #include <asm/arch/mbox.h>
  19 #include <asm/global_data.h>
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 struct msg_get_arm_mem {
  24         struct bcm2835_mbox_hdr hdr;
  25         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  26         u32 end_tag;
  27 };
  28
  29 int dram_init(void)
  30 {
  31         ALLOC_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1, 16);
  32         int ret;
  33
  34         BCM2835_MBOX_INIT_HDR(msg);
  35         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
  36
  37         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
  38         if (ret) {
  39                 printf("bcm2835: Could not query ARM memory size\n");
  40                 return -1;
  41         }
  42
  43         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
  44
  45         return 0;
  46 }
  47
  48 int board_init(void)
  49 {
  50         gd->bd->bi_boot_params = 0x100;
  51
  52         return 0;
  53 }