1/*
2 * Copyright (c) 2013-2020, Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2022 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_arch_context.h"
33#include "los_arch_interrupt.h"
34#include "los_arch_timer.h"
35#include "los_task.h"
36#include "los_sched.h"
37#include "los_memory.h"
38#include "soc_common.h"
39
40STATIC UINT32 g_sysNeedSched = FALSE;
41
42LITE_OS_SEC_TEXT_INIT VOID ArchInit(VOID)
43{
44    HalHwiInit();
45}
46
47VOID HalIrqEndCheckNeedSched(VOID)
48{
49    if (g_sysNeedSched) {
50        LOS_Schedule();
51    }
52}
53
54VOID ArchTaskSchedule(VOID)
55{
56    UINT32 intSave;
57
58    if (OS_INT_ACTIVE) {
59        g_sysNeedSched = TRUE;
60        return;
61    }
62
63    intSave = LOS_IntLock();
64    g_sysNeedSched = FALSE;
65    BOOL isSwitch = OsSchedTaskSwitch();
66    if (isSwitch) {
67        HalTaskContextSwitch(intSave);
68        return;
69    }
70
71    LOS_IntRestore(intSave);
72    return;
73}
74
75LITE_OS_SEC_TEXT_MINOR VOID ArchSysExit(VOID)
76{
77    ArchIntLock();
78    while (1) {
79    }
80}
81
82LITE_OS_SEC_TEXT_INIT VOID *ArchTskStackInit(UINT32 taskID, UINT32 stackSize, VOID *topStack)
83{
84    TaskContext *context = (TaskContext *)((UINTPTR)topStack + stackSize - sizeof(TaskContext));
85
86    context->mstatus = RISCV_MSTATUS_MPP | RISCV_MSTATUS_MPIE;
87    context->mepc = (UINT32)(UINTPTR)OsTaskEntry;
88    context->tp = TP_INIT_VALUE;
89    context->sp = SP_INIT_VALUE;
90    context->s11 = S11_INIT_VALUE;
91    context->s10 = S10_INIT_VALUE;
92    context->s9 = S9_INIT_VALUE;
93    context->s8 = S8_INIT_VALUE;
94    context->s7 = S7_INIT_VALUE;
95    context->s6 = S6_INIT_VALUE;
96    context->s5 = S5_INIT_VALUE;
97    context->s4 = S4_INIT_VALUE;
98    context->s3 = S3_INIT_VALUE;
99    context->s2 = S2_INIT_VALUE;
100    context->s1 = S1_INIT_VALUE;
101    context->s0 = FP_INIT_VALUE;
102    context->t6 = T6_INIT_VALUE;
103    context->t5 = T5_INIT_VALUE;
104    context->t4 = T4_INIT_VALUE;
105    context->t3 = T3_INIT_VALUE;
106    context->a7 = A7_INIT_VALUE;
107    context->a6 = A6_INIT_VALUE;
108    context->a5 = A5_INIT_VALUE;
109    context->a4 = A4_INIT_VALUE;
110    context->a3 = A3_INIT_VALUE;
111    context->a2 = A2_INIT_VALUE;
112    context->a1 = A1_INIT_VALUE;
113    context->a0 = taskID;
114    context->t2 = T2_INIT_VALUE;
115    context->t1 = T1_INIT_VALUE;
116    context->t0 = T0_INIT_VALUE;
117    context->ra = (UINT32)(UINTPTR)ArchSysExit;
118    return (VOID *)context;
119}
120
121LITE_OS_SEC_TEXT_INIT UINT32 ArchStartSchedule(VOID)
122{
123    (VOID)LOS_IntLock();
124    OsSchedStart();
125    HalStartToRun();
126    return LOS_OK; /* never return */
127}
128
129LITE_OS_SEC_TEXT VOID wfi(VOID)
130{
131    __asm__ __volatile__("wfi");
132}
133
134LITE_OS_SEC_TEXT VOID mb(VOID)
135{
136    __asm__ __volatile__("fence":::"memory");
137}
138
139LITE_OS_SEC_TEXT VOID dsb(VOID)
140{
141    __asm__ __volatile__("fence":::"memory");
142}
143