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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* Copyright 2017 IBM Corp.
*
* 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.
*/
#ifndef _LINUX_ASPEED_LPC_CTRL_H
#define _LINUX_ASPEED_LPC_CTRL_H
#include <linux/ioctl.h>
#include <linux/types.h>
/* Window types */
#define ASPEED_LPC_CTRL_WINDOW_FLASH 1
#define ASPEED_LPC_CTRL_WINDOW_MEMORY 2
/*
* This driver provides a window for the host to access a BMC resource
* across the BMC <-> Host LPC bus.
*
* window_type: The BMC resource that the host will access through the
* window. BMC flash and BMC RAM.
*
* window_id: For each window type there may be multiple windows,
* these are referenced by ID.
*
* flags: Reserved for future use, this field is expected to be
* zeroed.
*
* addr: Address on the host LPC bus that the specified window should
* be mapped. This address must be power of two aligned.
*
* offset: Offset into the BMC window that should be mapped to the
* host (at addr). This must be a multiple of size.
*
* size: The size of the mapping. The smallest possible size is 64K.
* This must be power of two aligned.
*
*/
struct aspeed_lpc_ctrl_mapping {
__u8 window_type;
__u8 window_id;
__u16 flags;
__u32 addr;
__u32 offset;
__u32 size;
};
#define __ASPEED_LPC_CTRL_IOCTL_MAGIC 0xb2
#define ASPEED_LPC_CTRL_IOCTL_GET_SIZE _IOWR(__ASPEED_LPC_CTRL_IOCTL_MAGIC, \
0x00, struct aspeed_lpc_ctrl_mapping)
#define ASPEED_LPC_CTRL_IOCTL_MAP _IOW(__ASPEED_LPC_CTRL_IOCTL_MAGIC, \
0x01, struct aspeed_lpc_ctrl_mapping)
#endif /* _LINUX_ASPEED_LPC_CTRL_H */