1*10465441SEvalZero /*
2*10465441SEvalZero * Copyright (c) 2006-2018, RT-Thread Development Team
3*10465441SEvalZero *
4*10465441SEvalZero * SPDX-License-Identifier: Apache-2.0
5*10465441SEvalZero *
6*10465441SEvalZero * Change Logs:
7*10465441SEvalZero * Date Author Notes
8*10465441SEvalZero * 2006-02-24 Bernard first version
9*10465441SEvalZero * 2006-05-03 Bernard add IRQ_DEBUG
10*10465441SEvalZero * 2016-08-09 ArdaFu add interrupt enter and leave hook.
11*10465441SEvalZero * 2018-11-22 Jesven rt_interrupt_get_nest function add disable irq
12*10465441SEvalZero */
13*10465441SEvalZero
14*10465441SEvalZero #include <rthw.h>
15*10465441SEvalZero #include <rtthread.h>
16*10465441SEvalZero
17*10465441SEvalZero #ifdef RT_USING_HOOK
18*10465441SEvalZero
19*10465441SEvalZero static void (*rt_interrupt_enter_hook)(void);
20*10465441SEvalZero static void (*rt_interrupt_leave_hook)(void);
21*10465441SEvalZero
22*10465441SEvalZero /**
23*10465441SEvalZero * @ingroup Hook
24*10465441SEvalZero * This function set a hook function when the system enter a interrupt
25*10465441SEvalZero *
26*10465441SEvalZero * @note the hook function must be simple and never be blocked or suspend.
27*10465441SEvalZero */
rt_interrupt_enter_sethook(void (* hook)(void))28*10465441SEvalZero void rt_interrupt_enter_sethook(void (*hook)(void))
29*10465441SEvalZero {
30*10465441SEvalZero rt_interrupt_enter_hook = hook;
31*10465441SEvalZero }
32*10465441SEvalZero /**
33*10465441SEvalZero * @ingroup Hook
34*10465441SEvalZero * This function set a hook function when the system exit a interrupt.
35*10465441SEvalZero *
36*10465441SEvalZero * @note the hook function must be simple and never be blocked or suspend.
37*10465441SEvalZero */
rt_interrupt_leave_sethook(void (* hook)(void))38*10465441SEvalZero void rt_interrupt_leave_sethook(void (*hook)(void))
39*10465441SEvalZero {
40*10465441SEvalZero rt_interrupt_leave_hook = hook;
41*10465441SEvalZero }
42*10465441SEvalZero #endif
43*10465441SEvalZero
44*10465441SEvalZero /* #define IRQ_DEBUG */
45*10465441SEvalZero
46*10465441SEvalZero /**
47*10465441SEvalZero * @addtogroup Kernel
48*10465441SEvalZero */
49*10465441SEvalZero
50*10465441SEvalZero /**@{*/
51*10465441SEvalZero
52*10465441SEvalZero #ifdef RT_USING_SMP
53*10465441SEvalZero #define rt_interrupt_nest rt_cpu_self()->irq_nest
54*10465441SEvalZero #else
55*10465441SEvalZero volatile rt_uint8_t rt_interrupt_nest = 0;
56*10465441SEvalZero #endif
57*10465441SEvalZero
58*10465441SEvalZero /**
59*10465441SEvalZero * This function will be invoked by BSP, when enter interrupt service routine
60*10465441SEvalZero *
61*10465441SEvalZero * @note please don't invoke this routine in application
62*10465441SEvalZero *
63*10465441SEvalZero * @see rt_interrupt_leave
64*10465441SEvalZero */
rt_interrupt_enter(void)65*10465441SEvalZero void rt_interrupt_enter(void)
66*10465441SEvalZero {
67*10465441SEvalZero rt_base_t level;
68*10465441SEvalZero
69*10465441SEvalZero RT_DEBUG_LOG(RT_DEBUG_IRQ, ("irq coming..., irq nest:%d\n",
70*10465441SEvalZero rt_interrupt_nest));
71*10465441SEvalZero
72*10465441SEvalZero level = rt_hw_interrupt_disable();
73*10465441SEvalZero rt_interrupt_nest ++;
74*10465441SEvalZero RT_OBJECT_HOOK_CALL(rt_interrupt_enter_hook,());
75*10465441SEvalZero rt_hw_interrupt_enable(level);
76*10465441SEvalZero }
77*10465441SEvalZero RTM_EXPORT(rt_interrupt_enter);
78*10465441SEvalZero
79*10465441SEvalZero /**
80*10465441SEvalZero * This function will be invoked by BSP, when leave interrupt service routine
81*10465441SEvalZero *
82*10465441SEvalZero * @note please don't invoke this routine in application
83*10465441SEvalZero *
84*10465441SEvalZero * @see rt_interrupt_enter
85*10465441SEvalZero */
rt_interrupt_leave(void)86*10465441SEvalZero void rt_interrupt_leave(void)
87*10465441SEvalZero {
88*10465441SEvalZero rt_base_t level;
89*10465441SEvalZero
90*10465441SEvalZero RT_DEBUG_LOG(RT_DEBUG_IRQ, ("irq leave, irq nest:%d\n",
91*10465441SEvalZero rt_interrupt_nest));
92*10465441SEvalZero
93*10465441SEvalZero level = rt_hw_interrupt_disable();
94*10465441SEvalZero rt_interrupt_nest --;
95*10465441SEvalZero RT_OBJECT_HOOK_CALL(rt_interrupt_leave_hook,());
96*10465441SEvalZero rt_hw_interrupt_enable(level);
97*10465441SEvalZero }
98*10465441SEvalZero RTM_EXPORT(rt_interrupt_leave);
99*10465441SEvalZero
100*10465441SEvalZero /**
101*10465441SEvalZero * This function will return the nest of interrupt.
102*10465441SEvalZero *
103*10465441SEvalZero * User application can invoke this function to get whether current
104*10465441SEvalZero * context is interrupt context.
105*10465441SEvalZero *
106*10465441SEvalZero * @return the number of nested interrupts.
107*10465441SEvalZero */
rt_interrupt_get_nest(void)108*10465441SEvalZero rt_uint8_t rt_interrupt_get_nest(void)
109*10465441SEvalZero {
110*10465441SEvalZero rt_uint8_t ret;
111*10465441SEvalZero rt_base_t level;
112*10465441SEvalZero
113*10465441SEvalZero level = rt_hw_interrupt_disable();
114*10465441SEvalZero ret = rt_interrupt_nest;
115*10465441SEvalZero rt_hw_interrupt_enable(level);
116*10465441SEvalZero return ret;
117*10465441SEvalZero }
118*10465441SEvalZero RTM_EXPORT(rt_interrupt_get_nest);
119*10465441SEvalZero
120*10465441SEvalZero RTM_EXPORT(rt_hw_interrupt_disable);
121*10465441SEvalZero RTM_EXPORT(rt_hw_interrupt_enable);
122*10465441SEvalZero
123*10465441SEvalZero /**@}*/
124*10465441SEvalZero
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