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