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