1 #pragma once
2
3 #include <common/unistd.h>
4 #include "apic.h"
5
6 extern uint64_t apic_timer_ticks_result;
7 // 5ms产生一次中断
8 #define APIC_TIMER_INTERVAL 5
9 #define APIC_TIMER_DIVISOR 3
10
11 #define APIC_TIMER_IRQ_NUM 151
12
13 #pragma GCC push_options
14 #pragma GCC optimize("O0")
15
16 /**
17 * @brief 设置apic定时器的分频计数
18 *
19 * @param divider 分频除数
20 */
apic_timer_set_div(uint64_t divider)21 static __always_inline void apic_timer_set_div(uint64_t divider)
22 {
23 if (CURRENT_APIC_STATE == APIC_X2APIC_ENABLED)
24 wrmsr(0x83e, divider);
25 else
26 __write4b(APIC_LOCAL_APIC_VIRT_BASE_ADDR + LOCAL_APIC_OFFSET_Local_APIC_CLKDIV, divider);
27 }
28
29 /**
30 * @brief 设置apic定时器的初始计数值
31 *
32 * @param init_cnt 初始计数值
33 */
apic_timer_set_init_cnt(uint32_t init_cnt)34 static __always_inline void apic_timer_set_init_cnt(uint32_t init_cnt)
35 {
36 if (CURRENT_APIC_STATE == APIC_X2APIC_ENABLED)
37 wrmsr(0x838, init_cnt);
38 else
39 __write4b(APIC_LOCAL_APIC_VIRT_BASE_ADDR + LOCAL_APIC_OFFSET_Local_APIC_INITIAL_COUNT_REG, init_cnt);
40 }
41
42 /**
43 * @brief 设置apic定时器的lvt，并启动定时器
44 *
45 * @param vector 中断向量号
46 * @param mask 是否屏蔽（1：屏蔽， 0：不屏蔽）
47 * @param mode 计时模式
48 */
apic_timer_set_LVT(uint32_t vector,uint32_t mask,uint32_t mode)49 static __always_inline void apic_timer_set_LVT(uint32_t vector, uint32_t mask, uint32_t mode)
50 {
51 register uint32_t val = (mode << 17) | vector | (mask ? (APIC_LVT_INT_MASKED) : 0);
52 if (CURRENT_APIC_STATE == APIC_X2APIC_ENABLED)
53 wrmsr(0x832, val);
54 else
55 __write4b(APIC_LOCAL_APIC_VIRT_BASE_ADDR + LOCAL_APIC_OFFSET_Local_APIC_LVT_TIMER, val);
56 }
57
apic_timer_write_LVT(uint32_t value)58 static __always_inline void apic_timer_write_LVT(uint32_t value)
59 {
60 if (CURRENT_APIC_STATE == APIC_X2APIC_ENABLED)
61 wrmsr(0x832, value);
62 else
63 __write4b(APIC_LOCAL_APIC_VIRT_BASE_ADDR + LOCAL_APIC_OFFSET_Local_APIC_LVT_TIMER, value);
64 }
65
66 /**
67 * @brief 获取apic定时器的LVT的值
68 *
69 */
apic_timer_get_LVT()70 static __always_inline uint32_t apic_timer_get_LVT()
71 {
72 if (CURRENT_APIC_STATE == APIC_X2APIC_ENABLED)
73 return rdmsr(0x832);
74 else
75 return __read4b(APIC_LOCAL_APIC_VIRT_BASE_ADDR + LOCAL_APIC_OFFSET_Local_APIC_LVT_TIMER);
76 }
77
78 /**
79 * @brief 获取apic定时器当前计数值
80 *
81 */
apic_timer_get_current()82 static __always_inline uint32_t apic_timer_get_current()
83 {
84 if (CURRENT_APIC_STATE == APIC_X2APIC_ENABLED)
85 return (uint32_t)rdmsr(0x839);
86 else
87 return __read4b(APIC_LOCAL_APIC_VIRT_BASE_ADDR + LOCAL_APIC_OFFSET_Local_APIC_CURRENT_COUNT_REG);
88 }
89
90 /**
91 * @brief 停止apic定时器
92 *
93 */
94 #define apic_timer_stop() \
95 do \
96 { \
97 uint32_t val = apic_timer_get_LVT(); \
98 val |= APIC_LVT_INT_MASKED; \
99 apic_timer_write_LVT(val); \
100 } while (0)
101
102 /**
103 * @brief 初始化local APIC定时器
104 *
105 */
106 void apic_timer_init();
107
108 #pragma GCC pop_options