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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
*
* 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; version 2 of the License.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <arch/cache.h>
#include <boot/coreboot_tables.h>
#include <device/device.h>
#define TO_MB(x) ((x)>>20)
/* convenient shorthand (in MB) */
#define DRAM_START TO_MB(CONFIG_SYS_SDRAM_BASE)
#define DRAM_SIZE (CONFIG_DRAM_SIZE_MB)
#define DRAM_END (DRAM_START + DRAM_SIZE)
/* DMA memory for drivers */
#define DMA_START TO_MB(CONFIG_DRAM_DMA_START)
#define DMA_SIZE TO_MB(CONFIG_DRAM_DMA_SIZE)
static void setup_mmu(void)
{
dcache_mmu_disable();
/* Map Device memory. */
mmu_config_range(0, DRAM_START, DCACHE_OFF);
/* Disable Page 0 for trapping NULL pointer references. */
mmu_disable_range(0, 1);
/* Map DRAM memory */
mmu_config_range(DRAM_START, DRAM_SIZE, DCACHE_WRITEBACK);
/* Map DMA memory */
if (DMA_SIZE)
mmu_config_range(DMA_START, DMA_SIZE, DCACHE_OFF);
mmu_disable_range(DRAM_END, 4096 - DRAM_END);
mmu_init();
dcache_mmu_enable();
}
static void mainboard_init(device_t dev)
{
setup_mmu();
}
static void mainboard_enable(device_t dev)
{
dev->ops->init = &mainboard_init;
}
struct chip_operations mainboard_ops = {
.name = "storm",
.enable_dev = mainboard_enable,
};
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