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