1/*
2 * Copyright (c) 2013-2020, Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 *    conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 *    of conditions and the following disclaimer in the documentation and/or other materials
13 *    provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 *    to endorse or promote products derived from this software without specific prior written
17 *    permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include "los_timer.h"
33#include "los_config.h"
34#include "los_tick.h"
35#include "los_reg.h"
36#include "los_arch_interrupt.h"
37#include "los_arch_timer.h"
38#include "riscv_hal.h"
39#include "los_debug.h"
40
41STATIC UINT32 SysTickStart(HWI_PROC_FUNC handler);
42STATIC UINT64 SysTickReload(UINT64 nextResponseTime);
43STATIC UINT64 SysTickCycleGet(UINT32 *period);
44STATIC VOID SysTickLock(VOID);
45STATIC VOID SysTickUnlock(VOID);
46
47STATIC ArchTickTimer g_archTickTimer = {
48    .freq = 0,
49    .irqNum = RISCV_MACH_TIMER_IRQ,
50    .periodMax = LOSCFG_BASE_CORE_TICK_RESPONSE_MAX,
51    .init = SysTickStart,
52    .getCycle = SysTickCycleGet,
53    .reload = SysTickReload,
54    .lock = SysTickLock,
55    .unlock = SysTickUnlock,
56    .tickHandler = NULL,
57};
58
59STATIC UINT32 SysTickStart(HWI_PROC_FUNC handler)
60{
61    ArchTickTimer *tick = &g_archTickTimer;
62
63    UINT32 period = (UINT32)LOSCFG_BASE_CORE_TICK_RESPONSE_MAX;
64    HwiIrqParam irqParam;
65    irqParam.pDevId = (VOID *)period;
66
67    UINT32 ret = LOS_HwiCreate(RISCV_MACH_TIMER_IRQ, 0x1, 0, handler, &irqParam);
68    if (ret != LOS_OK) {
69        return ret;
70    }
71
72    tick->freq = OS_SYS_CLOCK;
73
74    WRITE_UINT32(0xffffffff, MTIMERCMP + 4); /* The high 4 bits of mtimer */
75    WRITE_UINT32(period, MTIMERCMP);
76    WRITE_UINT32(0x0, MTIMERCMP + 4); /* The high 4 bits of mtimer */
77
78    HalIrqEnable(RISCV_MACH_TIMER_IRQ);
79    return LOS_OK;
80}
81
82STATIC UINT64 SysTickReload(UINT64 nextResponseTime)
83{
84    UINT64 timeMax = (UINT64)LOSCFG_BASE_CORE_TICK_RESPONSE_MAX - 1;
85    UINT64 timer;
86    UINT32 timerL, timerH;
87    READ_UINT32(timerL, MTIMER);
88    READ_UINT32(timerH, MTIMER + MTIMER_HI_OFFSET);
89    timer = OS_COMBINED_64(timerH, timerL);
90    if ((timeMax - nextResponseTime) > timer) {
91        timer += nextResponseTime;
92    } else {
93        timer = timeMax;
94    }
95
96    HalIrqDisable(RISCV_MACH_TIMER_IRQ);
97    WRITE_UINT32(0xffffffff, MTIMERCMP + MTIMER_HI_OFFSET);
98    WRITE_UINT32((UINT32)timer, MTIMERCMP);
99    WRITE_UINT32((UINT32)(timer >> SHIFT_32_BIT), MTIMERCMP + MTIMER_HI_OFFSET);
100    HalIrqEnable(RISCV_MACH_TIMER_IRQ);
101    return nextResponseTime;
102}
103
104STATIC UINT64 SysTickCycleGet(UINT32 *period)
105{
106    (VOID)period;
107    UINT32 timerL, timerH;
108
109    READ_UINT32(timerL, MTIMER);
110    READ_UINT32(timerH, MTIMER + MTIMER_HI_OFFSET);
111    return OS_COMBINED_64(timerH, timerL);
112}
113
114STATIC VOID SysTickLock(VOID)
115{
116    HalIrqDisable(RISCV_MACH_TIMER_IRQ);
117}
118
119STATIC VOID SysTickUnlock(VOID)
120{
121    HalIrqEnable(RISCV_MACH_TIMER_IRQ);
122}
123
124ArchTickTimer *ArchSysTickTimerGet(VOID)
125{
126    return &g_archTickTimer;
127}
128
129UINT32 ArchEnterSleep(VOID)
130{
131    wfi();
132
133    return LOS_OK;
134}
135
136