blob: 033355552a6e307882aca153e067d6b93999c19a (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* Copyright 2019 Google Inc
*
* 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.
*
* Provides a simple driver to control the ASPEED P2A interface which allows
* the host to read and write to various regions of the BMC's memory.
*/
#ifndef _UAPI_LINUX_ASPEED_P2A_CTRL_H
#define _UAPI_LINUX_ASPEED_P2A_CTRL_H
#include <linux/ioctl.h>
#include <linux/types.h>
#define ASPEED_P2A_CTRL_READ_ONLY 0
#define ASPEED_P2A_CTRL_READWRITE 1
/*
* This driver provides a mechanism for enabling or disabling the read-write
* property of specific windows into the ASPEED BMC's memory.
*
* A user can map a region of the BMC's memory as read-only or read-write, with
* the caveat that once any region is mapped, all regions are unlocked for
* reading.
*/
/*
* Unlock a region of BMC physical memory for access from the host.
*
* Also used to read back the optional memory-region configuration for the
* driver.
*/
struct aspeed_p2a_ctrl_mapping {
__u64 addr;
__u32 length;
__u32 flags;
};
#define __ASPEED_P2A_CTRL_IOCTL_MAGIC 0xb3
/*
* This IOCTL is meant to configure a region or regions of memory given a
* starting address and length to be readable by the host, or
* readable-writeable.
*/
#define ASPEED_P2A_CTRL_IOCTL_SET_WINDOW _IOW(__ASPEED_P2A_CTRL_IOCTL_MAGIC, \
0x00, struct aspeed_p2a_ctrl_mapping)
/*
* This IOCTL is meant to read back to the user the base address and length of
* the memory-region specified to the driver for use with mmap.
*/
#define ASPEED_P2A_CTRL_IOCTL_GET_MEMORY_CONFIG \
_IOWR(__ASPEED_P2A_CTRL_IOCTL_MAGIC, \
0x01, struct aspeed_p2a_ctrl_mapping)
#endif /* _UAPI_LINUX_ASPEED_P2A_CTRL_H */
|
