pc-conf-reg.h

 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(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(reg, PC_CONF_INDEX);
30	outb(data, PC_CONF_DATA);
31}
32
33#endif /* _ASM_X86_PC_CONF_REG_H */