[people/ms/u-boot.git] / board / imgtec / boston / ddr.c

/*
 * Copyright (C) 2016 Imagination Technologies
 *
 * SPDX-License-Identifier:	GPL-2.0
 */

#include <common.h>

#include <asm/io.h>

#include "boston-regs.h"

DECLARE_GLOBAL_DATA_PTR;

int initdram(void)
{
	u32 ddrconf0 = __raw_readl((uint32_t *)BOSTON_PLAT_DDRCONF0);

	gd->ram_size = (phys_size_t)(ddrconf0 & BOSTON_PLAT_DDRCONF0_SIZE) <<
			30;

	return 0;
}

ulong board_get_usable_ram_top(ulong total_size)
{
	DECLARE_GLOBAL_DATA_PTR;

	if (gd->ram_top < CONFIG_SYS_SDRAM_BASE) {
		/* 2GB wrapped around to 0 */
		return CKSEG0ADDR(256 << 20);
	}

	return min_t(unsigned long, gd->ram_top, CKSEG0ADDR(256 << 20));
}
Commit	Line	Data
ad8783cb PB	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
088454cd SG	13	DECLARE_GLOBAL_DATA_PTR;
	14
	15	int initdram(void)
ad8783cb PB	16	{
	17	u32 ddrconf0 = __raw_readl((uint32_t *)BOSTON_PLAT_DDRCONF0);
	18
088454cd SG	19	gd->ram_size = (phys_size_t)(ddrconf0 & BOSTON_PLAT_DDRCONF0_SIZE) <<
	20	30;
	21
	22	return 0;
ad8783cb PB	23	}
	24
	25	ulong board_get_usable_ram_top(ulong total_size)
	26	{
	27	DECLARE_GLOBAL_DATA_PTR;
	28
	29	if (gd->ram_top < CONFIG_SYS_SDRAM_BASE) {
	30	/* 2GB wrapped around to 0 */
	31	return CKSEG0ADDR(256 << 20);
	32	}
	33
	34	return min_t(unsigned long, gd->ram_top, CKSEG0ADDR(256 << 20));
	35	}