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/*
* Mapping Secure os carveout as 1 to 1 mapping.
*
* Copyright (c) 2013 NVIDIA Corporation.
*
* 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
* (at your option) 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include "common.h"
#if defined(CONFIG_PLATFORM_ENABLE_IOMMU)
static struct platform_device tegra_tzram_device = {
.name = "tegra-tzram",
.id = -1,
};
#endif
static int __init tegra_tzram_carveout_init(void)
{
int err = 0;
#if defined(CONFIG_PLATFORM_ENABLE_IOMMU)
DEFINE_DMA_ATTRS(attrs);
if (!tegra_tzram_start || !tegra_tzram_size)
return -EINVAL;
err = platform_device_register(&tegra_tzram_device);
if (err) {
pr_err("tegra device registration failed\n");
return err;
}
dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
dma_map_linear_attrs(&tegra_tzram_device.dev,
tegra_tzram_start, tegra_tzram_size, DMA_TO_DEVICE, &attrs);
#endif
return err;
}
late_initcall(tegra_tzram_carveout_init);
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