src/soc/nvidia/tegra210/ram_code.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright 2014 Google Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include <arch/io.h>
  18 #include <soc/addressmap.h>
  19 #include <soc/sdram.h>
  20 #include <soc/nvidia/tegra/apbmisc.h>
  21
  22 uint32_t sdram_get_ram_code(void)
  23 {
  24         struct apbmisc *misc = (struct apbmisc *)TEGRA_APB_MISC_BASE;
  25
  26         return (read32(&misc->pp_strapping_opt_a) &
  27                 PP_STRAPPING_OPT_A_RAM_CODE_MASK) >>
  28                 PP_STRAPPING_OPT_A_RAM_CODE_SHIFT;
  29 }