1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 * Copyright 2017 IBM Corp. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License 7 * as published by the Free Software Foundation; either version 8 * 2 of the License, or (at your option) any later version. 9 */ 10 11 #ifndef _UAPI_LINUX_ASPEED_LPC_CTRL_H 12 #define _UAPI_LINUX_ASPEED_LPC_CTRL_H 13 14 #include <linux/ioctl.h> 15 #include <linux/types.h> 16 17 /* Window types */ 18 #define ASPEED_LPC_CTRL_WINDOW_FLASH 1 19 #define ASPEED_LPC_CTRL_WINDOW_MEMORY 2 20 21 /* 22 * This driver provides a window for the host to access a BMC resource 23 * across the BMC <-> Host LPC bus. 24 * 25 * window_type: The BMC resource that the host will access through the 26 * window. BMC flash and BMC RAM. 27 * 28 * window_id: For each window type there may be multiple windows, 29 * these are referenced by ID. 30 * 31 * flags: Reserved for future use, this field is expected to be 32 * zeroed. 33 * 34 * addr: Address on the host LPC bus that the specified window should 35 * be mapped. This address must be power of two aligned. 36 * 37 * offset: Offset into the BMC window that should be mapped to the 38 * host (at addr). This must be a multiple of size. 39 * 40 * size: The size of the mapping. The smallest possible size is 64K. 41 * This must be power of two aligned. 42 * 43 */ 44 45 struct aspeed_lpc_ctrl_mapping { 46 __u8 window_type; 47 __u8 window_id; 48 __u16 flags; 49 __u32 addr; 50 __u32 offset; 51 __u32 size; 52 }; 53 54 #define __ASPEED_LPC_CTRL_IOCTL_MAGIC 0xb2 55 56 #define ASPEED_LPC_CTRL_IOCTL_GET_SIZE _IOWR(__ASPEED_LPC_CTRL_IOCTL_MAGIC, \ 57 0x00, struct aspeed_lpc_ctrl_mapping) 58 59 #define ASPEED_LPC_CTRL_IOCTL_MAP _IOW(__ASPEED_LPC_CTRL_IOCTL_MAGIC, \ 60 0x01, struct aspeed_lpc_ctrl_mapping) 61 62 #endif /* _UAPI_LINUX_ASPEED_LPC_CTRL_H */ 63