board/ti/am65x/evm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Board specific initialization for AM654 EVM
   4  *
   5  * Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
   6  *      Lokesh Vutla <[email protected]>
   7  *
   8  */
   9
  10 #include <common.h>
  11 #include <asm/io.h>
  12 #include <spl.h>
  13
  14 DECLARE_GLOBAL_DATA_PTR;
  15
  16 int board_init(void)
  17 {
  18         return 0;
  19 }
  20
  21 int dram_init(void)
  22 {
  23 #ifdef CONFIG_PHYS_64BIT
  24         gd->ram_size = 0x100000000;
  25 #else
  26         gd->ram_size = 0x80000000;
  27 #endif
  28
  29         return 0;
  30 }
  31
  32 ulong board_get_usable_ram_top(ulong total_size)
  33 {
  34 #ifdef CONFIG_PHYS_64BIT
  35         /* Limit RAM used by U-Boot to the DDR low region */
  36         if (gd->ram_top > 0x100000000)
  37                 return 0x100000000;
  38 #endif
  39
  40         return gd->ram_top;
  41 }
  42
  43 int dram_init_banksize(void)
  44 {
  45         /* Bank 0 declares the memory available in the DDR low region */
  46         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
  47         gd->bd->bi_dram[0].size = 0x80000000;
  48
  49 #ifdef CONFIG_PHYS_64BIT
  50         /* Bank 1 declares the memory available in the DDR high region */
  51         gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
  52         gd->bd->bi_dram[1].size = 0x80000000;
  53 #endif
  54
  55         return 0;
  56 }