/*
 * Copyright (c) 2013-2020, Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2022 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "los_arch_context.h"
#include "los_arch_interrupt.h"
#include "los_arch_timer.h"
#include "los_task.h"
#include "los_sched.h"
#include "los_memory.h"
#include "soc_common.h"
#include "securec.h"


extern LITE_OS_SEC_TEXT_INIT VOID OsTaskEntry(UINT32 taskID);
extern LITE_OS_SEC_TEXT_MINOR VOID ArchSysExit(VOID);

LITE_OS_SEC_TEXT_INIT VOID *__wrap_ArchTskStackInit(UINT32 taskID, UINT32 stackSize, VOID *topStack)
{
    TaskContext *context = (TaskContext *)((UINTPTR)topStack + stackSize - sizeof(TaskContext));
    UINT32 *bottom;
	bottom = (UINT32 *)context - (FPU_CONTEXT_SIZE);  // reserve the space for FPU regs. REGBYTES = sizeof(UINT32);
	memset_s(bottom, (FPU_CONTEXT_SIZE * sizeof(UINT32)), 0, (FPU_CONTEXT_SIZE * sizeof(UINT32)));

    context->mstatus = READ_CSR(mstatus);
	context->mstatus |= RISCV_MSTATUS_MPP | RISCV_MSTATUS_MPIE;

    context->mepc = (UINT32)(UINTPTR)OsTaskEntry;
    context->tp = TP_INIT_VALUE;
    context->sp = SP_INIT_VALUE;
    context->s11 = S11_INIT_VALUE;
    context->s10 = S10_INIT_VALUE;
    context->s9 = S9_INIT_VALUE;
    context->s8 = S8_INIT_VALUE;
    context->s7 = S7_INIT_VALUE;
    context->s6 = S6_INIT_VALUE;
    context->s5 = S5_INIT_VALUE;
    context->s4 = S4_INIT_VALUE;
    context->s3 = S3_INIT_VALUE;
    context->s2 = S2_INIT_VALUE;
    context->s1 = S1_INIT_VALUE;
    context->s0 = FP_INIT_VALUE;
    context->t6 = T6_INIT_VALUE;
    context->t5 = T5_INIT_VALUE;
    context->t4 = T4_INIT_VALUE;
    context->t3 = T3_INIT_VALUE;
    context->a7 = A7_INIT_VALUE;
    context->a6 = A6_INIT_VALUE;
    context->a5 = A5_INIT_VALUE;
    context->a4 = A4_INIT_VALUE;
    context->a3 = A3_INIT_VALUE;
    context->a2 = A2_INIT_VALUE;
    context->a1 = A1_INIT_VALUE;
    context->a0 = taskID;
    context->t2 = T2_INIT_VALUE;
    context->t1 = T1_INIT_VALUE;
    context->t0 = T0_INIT_VALUE;
    context->ra = (UINT32)(UINTPTR)ArchSysExit;
    return (VOID *)bottom;
}