board/imgtec/boston/ddr.c

   1 /*
   2  * Copyright (C) 2016 Imagination Technologies
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8
   9 #include <asm/io.h>
  10
  11 #include "boston-regs.h"
  12
  13 phys_size_t initdram(int board_type)
  14 {
  15         u32 ddrconf0 = __raw_readl((uint32_t *)BOSTON_PLAT_DDRCONF0);
  16
  17         return (phys_size_t)(ddrconf0 & BOSTON_PLAT_DDRCONF0_SIZE) << 30;
  18 }
  19
  20 ulong board_get_usable_ram_top(ulong total_size)
  21 {
  22         DECLARE_GLOBAL_DATA_PTR;
  23
  24         if (gd->ram_top < CONFIG_SYS_SDRAM_BASE) {
  25                 /* 2GB wrapped around to 0 */
  26                 return CKSEG0ADDR(256 << 20);
  27         }
  28
  29         return min_t(unsigned long, gd->ram_top, CKSEG0ADDR(256 << 20));
  30 }