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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-02-25 GuEe-GUI the first version
*/
#ifndef __VIRTIO_INTERNAL_H__
#define __VIRTIO_INTERNAL_H__
#include <drivers/virtio.h>
#include <drivers/core/dm.h>
rt_inline rt_bool_t virtio_legacy_is_little_endian(void)
{
#ifdef ARCH_CPU_BIG_ENDIAN
return RT_FALSE;
#else
return RT_TRUE;
#endif
}
rt_inline rt_bool_t virtio_is_little_endian(struct rt_virtio_device *vdev)
{
return rt_virtio_has_feature(vdev, VIRTIO_F_VERSION_1) ||
virtio_legacy_is_little_endian();
}
#ifdef __CHECKER__
#define FORCE __attribute__((force))
#else
#define FORCE
#endif
rt_inline rt_uint16_t virtio16_to_cpu(struct rt_virtio_device *vdev, rt_uint16_t val)
{
if (virtio_is_little_endian(vdev))
{
return rt_le16_to_cpu((FORCE rt_le16_t)val);
}
else
{
return rt_be16_to_cpu((FORCE rt_be16_t)val);
}
}
rt_inline rt_uint16_t cpu_to_virtio16(struct rt_virtio_device *vdev, rt_uint16_t val)
{
if (virtio_is_little_endian(vdev))
{
return (FORCE rt_le16_t)rt_cpu_to_le16(val);
}
else
{
return (FORCE rt_be16_t)rt_cpu_to_be16(val);
}
}
rt_inline rt_uint32_t virtio32_to_cpu(struct rt_virtio_device *vdev, rt_uint32_t val)
{
if (virtio_is_little_endian(vdev))
{
return rt_le32_to_cpu((FORCE rt_le32_t)val);
}
else
{
return rt_be32_to_cpu((FORCE rt_be32_t)val);
}
}
rt_inline rt_uint32_t cpu_to_virtio32(struct rt_virtio_device *vdev, rt_uint32_t val)
{
if (virtio_is_little_endian(vdev))
{
return (FORCE rt_le32_t)rt_cpu_to_le32(val);
}
else
{
return (FORCE rt_be32_t)rt_cpu_to_be32(val);
}
}
rt_inline rt_uint64_t virtio64_to_cpu(struct rt_virtio_device *vdev, rt_uint64_t val)
{
if (virtio_is_little_endian(vdev))
{
return rt_le64_to_cpu((FORCE rt_le64_t)val);
}
else
{
return rt_be64_to_cpu((FORCE rt_be64_t)val);
}
}
rt_inline rt_uint64_t cpu_to_virtio64(struct rt_virtio_device *vdev, rt_uint64_t val)
{
if (virtio_is_little_endian(vdev))
{
return (FORCE rt_le64_t)rt_cpu_to_le64(val);
}
else
{
return (FORCE rt_be64_t)rt_cpu_to_be64(val);
}
}
#undef FORCE
#endif /* __VIRTIO_INTERNAL_H__ */
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