Zephyr API Documentation 4.0.0-rc2
A Scalable Open Source RTOS
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sys_io.h
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1/*
2 * Copyright (c) 2015, Wind River Systems, Inc.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7/* Implementation of sys_io.h's documented functions */
8
9#ifndef ZEPHYR_INCLUDE_ARCH_X86_IA32_SYS_IO_H_
10#define ZEPHYR_INCLUDE_ARCH_X86_IA32_SYS_IO_H_
11
12#if !defined(_ASMLANGUAGE)
13
14#include <zephyr/sys/sys_io.h>
15#include <zephyr/types.h>
16#include <stddef.h>
17
18static ALWAYS_INLINE
19 void sys_io_set_bit(io_port_t port, unsigned int bit)
20{
21 uint32_t reg = 0;
22
23 __asm__ volatile("inl %w1, %0;\n\t"
24 "btsl %2, %0;\n\t"
25 "outl %0, %w1;\n\t"
26 :
27 : "a" (reg), "Nd" (port), "Ir" (bit));
28}
29
30static ALWAYS_INLINE
31 void sys_io_clear_bit(io_port_t port, unsigned int bit)
32{
33 uint32_t reg = 0;
34
35 __asm__ volatile("inl %w1, %0;\n\t"
36 "btrl %2, %0;\n\t"
37 "outl %0, %w1;\n\t"
38 :
39 : "a" (reg), "Nd" (port), "Ir" (bit));
40}
41
42static ALWAYS_INLINE
43 int sys_io_test_bit(io_port_t port, unsigned int bit)
44{
45 uint32_t ret;
46
47 __asm__ volatile("inl %w1, %0\n\t"
48 "btl %2, %0\n\t"
49 : "=a" (ret)
50 : "Nd" (port), "Ir" (bit));
51
52 return (ret & 1U);
53}
54
55static ALWAYS_INLINE
56 int sys_io_test_and_set_bit(io_port_t port, unsigned int bit)
57{
58 int ret;
59
60 ret = sys_io_test_bit(port, bit);
61 sys_io_set_bit(port, bit);
62
63 return ret;
64}
65
66static ALWAYS_INLINE
67 int sys_io_test_and_clear_bit(io_port_t port, unsigned int bit)
68{
69 int ret;
70
71 ret = sys_io_test_bit(port, bit);
72 sys_io_clear_bit(port, bit);
73
74 return ret;
75}
76
77#endif /* _ASMLANGUAGE */
78
79#endif /* ZEPHYR_INCLUDE_ARCH_X86_IA32_SYS_IO_H_ */
static ALWAYS_INLINE int sys_io_test_and_set_bit(io_port_t port, unsigned int bit)
Definition sys_io.h:108
static ALWAYS_INLINE int sys_io_test_bit(io_port_t port, unsigned int bit)
Definition sys_io.h:90
static ALWAYS_INLINE int sys_io_test_and_clear_bit(io_port_t port, unsigned int bit)
Definition sys_io.h:119
static ALWAYS_INLINE void sys_io_clear_bit(io_port_t port, unsigned int bit)
Definition sys_io.h:76
static ALWAYS_INLINE void sys_io_set_bit(io_port_t port, unsigned int bit)
Definition sys_io.h:62
#define ALWAYS_INLINE
Definition common.h:129
__UINT32_TYPE__ uint32_t
Definition stdint.h:90
uint32_t io_port_t
Definition sys_io.h:19