/*
 * ***************************************************************************
 * Copyright (C) 2015 Marvell International Ltd.
 * ***************************************************************************
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation, either version 2 of the License, or any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * ***************************************************************************
 */

#include <assert.h>
#include <mmio.h>
#include <plat_def.h>

#define LLC_CTRL                       0x100
#define LLC_CACHE_SYNC                 0x700
#define L2X0_INV_WAY                    0x77C
#define L2X0_CLEAN_WAY                 0x7BC
#define L2X0_CLEAN_INV_WAY             0x7FC

#define LLC_CTRL_EN	                1
#define LLC_EXCLUSIVE_EN		0x100
#define LLC_WAY_MASK			0xFFFFFFFF

void llc_cache_sync(void)
{
	mmio_write_32(MVEBU_LLC_BASE + LLC_CACHE_SYNC, 0);
	/* Atumic write no need to wait */
}

void llc_flush_all(void)
{
	mmio_write_32(MVEBU_LLC_BASE + L2X0_CLEAN_INV_WAY, LLC_WAY_MASK);
	llc_cache_sync();
}

void llc_clean_all(void)
{
	mmio_write_32(MVEBU_LLC_BASE + L2X0_CLEAN_WAY, LLC_WAY_MASK);
	llc_cache_sync();
}

void llc_inv_all(void)
{
	mmio_write_32(MVEBU_LLC_BASE + L2X0_INV_WAY, LLC_WAY_MASK);
	llc_cache_sync();
}

void llc_disable(void)
{
	llc_flush_all();
	mmio_write_32(MVEBU_LLC_BASE + LLC_CTRL, 0);
	__asm__ volatile("dsb st");
}

void llc_enable(int excl_mode)
{
	uint32_t val;

	__asm__ volatile("dsb sy");
	llc_inv_all();
	__asm__ volatile("dsb sy");

	val = LLC_CTRL_EN;
	if (excl_mode)
		val |= LLC_EXCLUSIVE_EN;

	mmio_write_32(MVEBU_LLC_BASE + LLC_CTRL, val);
	__asm__ volatile("dsb sy");
}

int llc_is_exclusive(void)
{
	uint32_t reg;

	reg = mmio_read_32(MVEBU_LLC_BASE + LLC_CTRL);

	if ((reg & (LLC_CTRL_EN | LLC_EXCLUSIVE_EN)) == (LLC_CTRL_EN | LLC_EXCLUSIVE_EN))
		return 1;
	return 0;
}

void llc_save(void)
{
	/* TBD */
}

void llc_resume(void)
{
	/* TBD */
}