u-boot/arch/x86/cpu/quark/dram.c

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/*
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/post.h>
#include <asm/arch/quark.h>
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
/* hardcode the DRAM size for now */
gd->ram_size = DRAM_MAX_SIZE;
post_code(POST_DRAM);
return 0;
}
void dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = 0;
gd->bd->bi_dram[0].size = gd->ram_size;
}
/*
* This function looks for the highest region of memory lower than 4GB which
* has enough space for U-Boot where U-Boot is aligned on a page boundary.
* It overrides the default implementation found elsewhere which simply
* picks the end of ram, wherever that may be. The location of the stack,
* the relocation address, and how far U-Boot is moved by relocation are
* set in the global data structure.
*/
ulong board_get_usable_ram_top(ulong total_size)
{
return gd->ram_size;
}