name : aspeed-lpc-ctrl.h /* 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 */