1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Support for the configuration register space at port I/O locations |
4 | * 0x22 and 0x23 variously used by PC architectures, e.g. the MP Spec, |
5 | * Cyrix CPUs, numerous chipsets. |
6 | */ |
7 | #ifndef _ASM_X86_PC_CONF_REG_H |
8 | #define _ASM_X86_PC_CONF_REG_H |
9 | |
10 | #include <linux/io.h> |
11 | #include <linux/spinlock.h> |
12 | #include <linux/types.h> |
13 | |
14 | #define PC_CONF_INDEX 0x22 |
15 | #define PC_CONF_DATA 0x23 |
16 | |
17 | #define PC_CONF_MPS_IMCR 0x70 |
18 | |
19 | extern raw_spinlock_t pc_conf_lock; |
20 | |
21 | static inline u8 pc_conf_get(u8 reg) |
22 | { |
23 | outb(value: reg, PC_CONF_INDEX); |
24 | return inb(PC_CONF_DATA); |
25 | } |
26 | |
27 | static inline void pc_conf_set(u8 reg, u8 data) |
28 | { |
29 | outb(value: reg, PC_CONF_INDEX); |
30 | outb(value: data, PC_CONF_DATA); |
31 | } |
32 | |
33 | #endif /* _ASM_X86_PC_CONF_REG_H */ |
34 | |