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
19extern raw_spinlock_t pc_conf_lock;
20
21static inline u8 pc_conf_get(u8 reg)
22{
23 outb(value: reg, PC_CONF_INDEX);
24 return inb(PC_CONF_DATA);
25}
26
27static 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