arch/x86/cpu/coreboot/sdram.c

   1 /*
   2  * Copyright (c) 2011 The Chromium OS Authors.
   3  * (C) Copyright 2010,2011
   4  * Graeme Russ, <graeme.russ@gmail.com>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but without any warranty; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <common.h>
  26 #include <malloc.h>
  27 #include <asm/e820.h>
  28 #include <asm/u-boot-x86.h>
  29 #include <asm/global_data.h>
  30 #include <asm/arch-coreboot/sysinfo.h>
  31 #include <asm/arch-coreboot/tables.h>
  32
  33 DECLARE_GLOBAL_DATA_PTR;
  34
  35 unsigned install_e820_map(unsigned max_entries, struct e820entry *entries)
  36 {
  37         int i;
  38
  39         unsigned num_entries = min(lib_sysinfo.n_memranges, max_entries);
  40         if (num_entries < lib_sysinfo.n_memranges) {
  41                 printf("Warning: Limiting e820 map to %d entries.\n",
  42                         num_entries);
  43         }
  44         for (i = 0; i < num_entries; i++) {
  45                 struct memrange *memrange = &lib_sysinfo.memrange[i];
  46
  47                 entries[i].addr = memrange->base;
  48                 entries[i].size = memrange->size;
  49                 entries[i].type = memrange->type;
  50         }
  51         return num_entries;
  52 }
  53
  54 int dram_init_f(void)
  55 {
  56         int i;
  57         phys_size_t ram_size = 0;
  58
  59         for (i = 0; i < lib_sysinfo.n_memranges; i++) {
  60                 struct memrange *memrange = &lib_sysinfo.memrange[i];
  61                 unsigned long long end = memrange->base + memrange->size;
  62
  63                 if (memrange->type == CB_MEM_RAM && end > ram_size)
  64                         ram_size = end;
  65         }
  66         gd->ram_size = ram_size;
  67         if (ram_size == 0)
  68                 return -1;
  69         return 0;
  70 }
  71
  72 int dram_init(void)
  73 {
  74         return 0;
  75 }