1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2016 Imagination Technologies
4 */
5
6#include <common.h>
7#include <init.h>
8#include <asm/global_data.h>
9
10#include <asm/io.h>
11
12#include "boston-regs.h"
13
14DECLARE_GLOBAL_DATA_PTR;
15
16int dram_init(void)
17{
18	u32 ddrconf0 = __raw_readl((uint32_t *)BOSTON_PLAT_DDRCONF0);
19
20	gd->ram_size = (phys_size_t)(ddrconf0 & BOSTON_PLAT_DDRCONF0_SIZE) <<
21			30;
22
23	return 0;
24}
25
26phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
27{
28	DECLARE_GLOBAL_DATA_PTR;
29
30	if (gd->ram_top < CFG_SYS_SDRAM_BASE) {
31		/* 2GB wrapped around to 0 */
32		return CKSEG0ADDR(256 << 20);
33	}
34
35	return min_t(unsigned long, gd->ram_top, CKSEG0ADDR(256 << 20));
36}
37