| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Support for the configuration register space at port I/O locations |
| * 0x22 and 0x23 variously used by PC architectures, e.g. the MP Spec, |
| * Cyrix CPUs, numerous chipsets. |
| */ |
| #ifndef _ASM_X86_PC_CONF_REG_H |
| #define _ASM_X86_PC_CONF_REG_H |
| |
| #include <linux/io.h> |
| #include <linux/spinlock.h> |
| #include <linux/types.h> |
| |
| #define PC_CONF_INDEX 0x22 |
| #define PC_CONF_DATA 0x23 |
| |
| #define PC_CONF_MPS_IMCR 0x70 |
| |
| extern raw_spinlock_t pc_conf_lock; |
| |
| static inline u8 pc_conf_get(u8 reg) |
| { |
| outb(reg, PC_CONF_INDEX); |
| return inb(PC_CONF_DATA); |
| } |
| |
| static inline void pc_conf_set(u8 reg, u8 data) |
| { |
| outb(reg, PC_CONF_INDEX); |
| outb(data, PC_CONF_DATA); |
| } |
| |
| #endif /* _ASM_X86_PC_CONF_REG_H */ |
