diff --git a/arch/csky/BUILD.gn b/arch/csky/BUILD.gn
index caad3327..d0884ff5 100644
--- a/arch/csky/BUILD.gn
+++ b/arch/csky/BUILD.gn
@@ -30,9 +30,5 @@
 import("//kernel/liteos_m/liteos.gni")
 
 module_group("csky") {
-  if ("$board_cpu" == "ck804ef") {
-    modules = [ "$board_cpu/gcc" ]
-  } else {
-    modules = [ "v2/gcc" ]
-  }
+  modules = [ "v2/gcc" ]
 }
diff --git a/arch/csky/ck804ef/gcc/BUILD.gn b/arch/csky/ck804ef/gcc/BUILD.gn
deleted file mode 100755
index 2cddccf6..00000000
--- a/arch/csky/ck804ef/gcc/BUILD.gn
+++ /dev/null
@@ -1,44 +0,0 @@
-# Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
-# Copyright (c) 2020-2021 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.
-
-import("//kernel/liteos_m/liteos.gni")
-
-module_name = "arch"
-kernel_module(module_name) {
-  sources = [
-    "los_context.c",
-    "los_dispatch.S",
-    "los_interrupt.c",
-    "los_timer.c",
-  ]
-}
-
-config("public") {
-  include_dirs = [ "." ]
-}
diff --git a/arch/csky/ck804ef/gcc/los_arch_context.h b/arch/csky/ck804ef/gcc/los_arch_context.h
deleted file mode 100755
index 349ac82c..00000000
--- a/arch/csky/ck804ef/gcc/los_arch_context.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
- * Copyright (c) 2020-2021 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.
- */
-
-#ifndef _LOS_ARCH_CONTEXT_H
-#define _LOS_ARCH_CONTEXT_H
-
-#include "los_config.h"
-#include "los_compiler.h"
-
-#ifdef __cplusplus
-#if __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-#endif /* __cplusplus */
-
-#define OS_TRAP_STACK_SIZE  500
-
-typedef struct TagTskContext {
-    UINT32 R0;
-    UINT32 R1;
-    UINT32 R2;
-    UINT32 R3;
-    UINT32 R4;
-    UINT32 R5;
-    UINT32 R6;
-    UINT32 R7;
-    UINT32 R8;
-    UINT32 R9;
-    UINT32 R10;
-    UINT32 R11;
-    UINT32 R12;
-    UINT32 R13;
-    UINT32 R15;
-    UINT32 R16;
-    UINT32 R17;
-    UINT32 R18;
-    UINT32 R19;
-    UINT32 R20;
-    UINT32 R21;
-    UINT32 R22;
-    UINT32 R23;
-    UINT32 R24;
-    UINT32 R25;
-    UINT32 R26;
-    UINT32 R27;
-    UINT32 R28;
-    UINT32 R29;
-    UINT32 R30;
-    UINT32 R31;
-    UINT32 VR0;
-    UINT32 VR1;
-    UINT32 VR2;
-    UINT32 VR3;
-    UINT32 VR4;
-    UINT32 VR5;
-    UINT32 VR6;
-    UINT32 VR7;
-    UINT32 VR8;
-    UINT32 VR9;
-    UINT32 VR10;
-    UINT32 VR11;
-    UINT32 VR12;
-    UINT32 VR13;
-    UINT32 VR14;
-    UINT32 VR15;
-    UINT32 EPSR;
-    UINT32 EPC;
-} TaskContext;
-
-VOID HalStartToRun(VOID);
-VOID HalTaskContextSwitch(VOID);
-VOID HalIrqEndCheckNeedSched(VOID);
-
-#ifdef __cplusplus
-#if __cplusplus
-}
-#endif /* __cplusplus */
-#endif /* __cplusplus */
-
-#endif /* _LOS_ARCH_CONTEXT_H */
diff --git a/arch/csky/ck804ef/gcc/los_arch_interrupt.h b/arch/csky/ck804ef/gcc/los_arch_interrupt.h
deleted file mode 100755
index 52db0682..00000000
--- a/arch/csky/ck804ef/gcc/los_arch_interrupt.h
+++ /dev/null
@@ -1,371 +0,0 @@
-/*
- * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
- * Copyright (c) 2020-2021 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.
- */
-
-#ifndef _LOS_ARCH_INTERRUPT_H
-#define _LOS_ARCH_INTERRUPT_H
-
-#include "los_config.h"
-#include "los_compiler.h"
-#include "los_interrupt.h"
-
-#ifdef __cplusplus
-#if __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-#endif /* __cplusplus */
-
-/* *
- * @ingroup los_arch_interrupt
- * Maximum number of used hardware interrupts.
- */
-#ifndef OS_HWI_MAX_NUM
-#define OS_HWI_MAX_NUM                        LOSCFG_PLATFORM_HWI_LIMIT
-#endif
-
-/* *
- * @ingroup los_arch_interrupt
- * Highest priority of a hardware interrupt.
- */
-#ifndef OS_HWI_PRIO_HIGHEST
-#define OS_HWI_PRIO_HIGHEST                   0
-#endif
-
-/* *
- * @ingroup los_arch_interrupt
- * Lowest priority of a hardware interrupt.
- */
-#ifndef OS_HWI_PRIO_LOWEST
-#define OS_HWI_PRIO_LOWEST                    3
-#endif
-
-/* *
- * @ingroup  los_arch_interrupt
- * Define the type of a hardware interrupt vector table function.
- */
-typedef VOID (**HWI_VECTOR_FUNC)(VOID);
-
-/* *
- * @ingroup los_arch_interrupt
- * Count of interrupts.
- */
-extern volatile UINT32 g_intCount;
-
-/* *
- * @ingroup los_arch_interrupt
- * Count of C-sky system interrupt vector.
- */
-#define OS_SYS_VECTOR_CNT                     32
-
-/* *
- * @ingroup los_arch_interrupt
- * Count of C-sky interrupt vector.
- */
-#define OS_VECTOR_CNT                         (OS_SYS_VECTOR_CNT + OS_HWI_MAX_NUM)
-
-#define PSR_VEC_OFFSET                         16U
-#define VIC_REG_BASE                           0xE000E100UL
-
-typedef struct {
-    UINT32 ISER[4U];
-    UINT32 RESERVED0[12U];
-    UINT32 IWER[4U];
-    UINT32 RESERVED1[12U];
-    UINT32 ICER[4U];
-    UINT32 RESERVED2[12U];
-    UINT32 IWDR[4U];
-    UINT32 RESERVED3[12U];
-    UINT32 ISPR[4U];
-    UINT32 RESERVED4[12U];
-    UINT32 ISSR[4U];
-    UINT32 RESERVED5[12U];
-    UINT32 ICPR[4U];
-    UINT32 RESERVED6[12U];
-    UINT32 ICSR[4U];
-    UINT32 RESERVED7[12U];
-    UINT32 IABR[4U];
-    UINT32 RESERVED8[60U];
-    UINT32 IPR[32U];
-    UINT32 RESERVED9[480U];
-    UINT32 ISR;
-    UINT32 IPTR;
-    UINT32 TSPEND;
-    UINT32 TSABR;
-    UINT32 TSPR;
-} VIC_TYPE;
-
-/* *
- * @ingroup los_arch_interrupt
- * Hardware interrupt error code: Invalid interrupt number.
- *
- * Value: 0x02000900
- *
- * Solution: Ensure that the interrupt number is valid.
- */
-#define OS_ERRNO_HWI_NUM_INVALID              LOS_ERRNO_OS_ERROR(LOS_MOD_HWI, 0x00)
-
-/* *
- * @ingroup los_arch_interrupt
- * Hardware interrupt error code: Null hardware interrupt handling function.
- *
- * Value: 0x02000901
- *
- * Solution: Pass in a valid non-null hardware interrupt handling function.
- */
-#define OS_ERRNO_HWI_PROC_FUNC_NULL           LOS_ERRNO_OS_ERROR(LOS_MOD_HWI, 0x01)
-
-/* *
- * @ingroup los_arch_interrupt
- * Hardware interrupt error code: Insufficient interrupt resources for hardware interrupt creation.
- *
- * Value: 0x02000902
- *
- * Solution: Increase the configured maximum number of supported hardware interrupts.
- */
-#define OS_ERRNO_HWI_CB_UNAVAILABLE           LOS_ERRNO_OS_ERROR(LOS_MOD_HWI, 0x02)
-
-/* *
- * @ingroup los_arch_interrupt
- * Hardware interrupt error code: Insufficient memory for hardware interrupt initialization.
- *
- * Value: 0x02000903
- *
- * Solution: Expand the configured memory.
- */
-#define OS_ERRNO_HWI_NO_MEMORY                LOS_ERRNO_OS_ERROR(LOS_MOD_HWI, 0x03)
-
-/* *
- * @ingroup los_arch_interrupt
- * Hardware interrupt error code: The interrupt has already been created.
- *
- * Value: 0x02000904
- *
- * Solution: Check whether the interrupt specified by the passed-in interrupt number has already been created.
- */
-#define OS_ERRNO_HWI_ALREADY_CREATED          LOS_ERRNO_OS_ERROR(LOS_MOD_HWI, 0x04)
-
-/* *
- * @ingroup los_arch_interrupt
- * Hardware interrupt error code: Invalid interrupt priority.
- *
- * Value: 0x02000905
- *
- * Solution: Ensure that the interrupt priority is valid.
- */
-#define OS_ERRNO_HWI_PRIO_INVALID             LOS_ERRNO_OS_ERROR(LOS_MOD_HWI, 0x05)
-
-/* *
- * @ingroup los_arch_interrupt
- * Hardware interrupt error code: Incorrect interrupt creation mode.
- *
- * Value: 0x02000906
- *
- * Solution: The interrupt creation mode can be only set to OS_HWI_MODE_COMM or OS_HWI_MODE_FAST.
- */
-#define OS_ERRNO_HWI_MODE_INVALID             LOS_ERRNO_OS_ERROR(LOS_MOD_HWI, 0x06)
-
-/* *
- * @ingroup los_arch_interrupt
- * Hardware interrupt error code: The interrupt has already been created as a fast interrupt.
- *
- * Value: 0x02000907
- *
- * Solution: Check whether the interrupt specified by the passed-in interrupt number has already been created.
- */
-#define OS_ERRNO_HWI_FASTMODE_ALREADY_CREATED LOS_ERRNO_OS_ERROR(LOS_MOD_HWI, 0x07)
-
-/* *
- * @ingroup los_arch_interrupt
- * Hardware interrupt error code: Invalid interrupt number.
- *
- * Value: 0x02000900
- *
- * Solution: Ensure that the interrupt number is valid.
- */
-#define LOS_ERRNO_HWI_NUM_INVALID             OS_ERRNO_HWI_NUM_INVALID
-
-#if (LOSCFG_PLATFORM_HWI_WITH_ARG == 1)
-/* *
- * @ingroup los_arch_interrupt
- * Set interrupt vector table.
- */
-extern VOID OsSetVector(UINT32 num, HWI_PROC_FUNC vector, VOID *arg);
-#else
-/* *
- * @ingroup los_arch_interrupt
- * Set interrupt vector table.
- */
-extern VOID OsSetVector(UINT32 num, HWI_PROC_FUNC vector);
-#endif
-
-/* *
- * @ingroup  los_arch_interrupt
- * @brief: Hardware interrupt entry function.
- *
- * @par Description:This API is used as all hardware interrupt handling function entry.
- *
- * @attention:None.
- *
- * @param:None.
- *
- * @retval:None.
- * @par Dependency:los_arch_interrupt.h: the header file that contains the API declaration.
- * @see None.
- */
-extern VOID HalInterrupt(VOID);
-
-/* *
- * @ingroup  los_arch_interrupt
- * @brief: Get an interrupt number.
- *
- * @par Description:This API is used to get the current interrupt number.
- *
- * @attention:None.
- *
- * @param: None.
- *
- * @retval: Interrupt Indexes number.
- * @par Dependency:los_arch_interrupt.h: the header file that contains the API declaration.
- * @see None.
- */
-extern UINT32 HalIntNumGet(VOID);
-
-/* *
- * @ingroup  los_arch_interrupt
- * @brief: Default vector handling function.
- *
- * @par Description:This API is used to configure interrupt for null function.
- *
- * @attention:None.
- *
- * @param:None.
- *
- * @retval:None.
- * @par Dependency:los_arch_interrupt.h: the header file that contains the API declaration.
- * @see None.
- */
-extern VOID HalHwiDefaultHandler(VOID);
-
-#define OS_EXC_IN_INIT                      0
-#define OS_EXC_IN_TASK                      1
-#define OS_EXC_IN_HWI                       2
-
-#define OS_VIC_INT_ENABLE_SIZE             0x4
-#define OS_VIC_INT_WAKER_SIZE              0x4
-#define OS_VIC_INT_ICER_SIZE               0x4
-#define OS_VIC_INT_ISPR_SIZE               0x4
-#define OS_VIC_INT_IABR_SIZE               0x4
-#define OS_VIC_INT_IPR_SIZE                0x4
-#define OS_VIC_INT_ISR_SIZE                0x4
-#define OS_VIC_INT_IPTR_SIZE               0x4
-
-#define OS_EXC_FLAG_FAULTADDR_VALID         0x01
-
-#define OS_EXC_IMPRECISE_ACCESS_ADDR        0xABABABAB
-
-/**
- * @ingroup los_exc
- * the struct of register files
- *
- * description: the register files that saved when exception triggered
- *
- * notes:the following register with prefix 'uw'  correspond to the registers in the cpu  data sheet.
- */
-typedef struct TagExcContext {
-    UINT32 R0;
-    UINT32 R1;
-    UINT32 R2;
-    UINT32 R3;
-    UINT32 R4;
-    UINT32 R5;
-    UINT32 R6;
-    UINT32 R7;
-    UINT32 R8;
-    UINT32 R9;
-    UINT32 R10;
-    UINT32 R11;
-    UINT32 R12;
-    UINT32 R13;
-    UINT32 R14;
-    UINT32 R15;
-    UINT32 EPSR;
-    UINT32 EPC;
-} EXC_CONTEXT_S;
-
-/* *
- * @ingroup  los_arch_interrupt
- * @brief: Exception handler function.
- *
- * @par Description:
- * This API is used to handle Exception.
- *
- * @attention:None.
- *
- * @param  excBufAddr     [IN] The address of stack pointer at which the error occurred.
- * @param  faultAddr      [IN] The address at which the error occurred.
- *
- * @retval:None.
- * @par Dependency:los_arch_interrupt.h: the header file that contains the API declaration.
- * @see None.
- */
-LITE_OS_SEC_TEXT_INIT VOID HalExcHandleEntry(EXC_CONTEXT_S *excBufAddr, UINT32 faultAddr);
-
-VOID IrqEntry(VOID);
-
-VOID HandleEntry(VOID);
-
-VOID HalHwiInit(VOID);
-
-/**
- * @ingroup los_exc
- * Exception information structure
- *
- * Description: Exception information saved when an exception is triggered on the Csky platform.
- *
- */
-typedef struct TagExcInfo {
-    UINT16 phase;
-    UINT16 type;
-    UINT32 faultAddr;
-    UINT32 thrdPid;
-    UINT16 nestCnt;
-    UINT16 reserved;
-    EXC_CONTEXT_S *context;
-} ExcInfo;
-
-#define MAX_INT_INFO_SIZE       (8 + 0x164)
-
-#ifdef __cplusplus
-#if __cplusplus
-}
-#endif /* __cplusplus */
-#endif /* __cplusplus */
-
-#endif /* _LOS_ARCH_INTERRUPT_H */
diff --git a/arch/csky/ck804ef/gcc/los_arch_timer.h b/arch/csky/ck804ef/gcc/los_arch_timer.h
deleted file mode 100755
index 2ebc4727..00000000
--- a/arch/csky/ck804ef/gcc/los_arch_timer.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
- * Copyright (c) 2020-2021 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.
- */
-
-#ifndef _LOS_ARCH_TIMER_H
-#define _LOS_ARCH_TIMER_H
-
-#include "los_config.h"
-#include "los_compiler.h"
-#include "los_timer.h"
-
-#ifdef __cplusplus
-#if __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-#endif /* __cplusplus */
-
-UINT32 HalTickStart(void);
-
-#ifdef __cplusplus
-#if __cplusplus
-}
-#endif /* __cplusplus */
-#endif /* __cplusplus */
-
-#endif /* _LOS_ARCH_TIMER_H */
diff --git a/arch/csky/ck804ef/gcc/los_context.c b/arch/csky/ck804ef/gcc/los_context.c
deleted file mode 100755
index 1d1fae60..00000000
--- a/arch/csky/ck804ef/gcc/los_context.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
- * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
- * Copyright (c) 2020-2021 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 <stdio.h>
-#include <assert.h>
-#include "securec.h"
-#include "los_arch_context.h"
-#include "los_arch_interrupt.h"
-#include "los_task.h"
-#include "los_sched.h"
-#include "los_interrupt.h"
-#include "los_debug.h"
-#include "los_context.h"
-
-STATIC volatile UINT32 g_sysNeedSched = FALSE;
-#define  ATTRIBUTE_ISR __attribute__((isr))
-
-/* ****************************************************************************
- Function    : ArchInit
- Description : arch init function
- Input       : None
- Output      : None
- Return      : None
- **************************************************************************** */
-LITE_OS_SEC_TEXT_INIT VOID ArchInit(VOID)
-{
-}
-
-/* ****************************************************************************
- Function    : ArchSysExit
- Description : Task exit function
- Input       : None
- Output      : None
- Return      : None
- **************************************************************************** */
-LITE_OS_SEC_TEXT_MINOR VOID ArchSysExit(VOID)
-{
-    printf("\nArchSysExit\n");
-    while (1) {
-    }
-}
-
-/* ****************************************************************************
- Function    : ArchTskStackRegInit
- Description : Task exit function
- Input       : None
- Output      : None
- Return      : None
- **************************************************************************** */
-VOID ArchTskStackRegInit(TaskContext *context)
-{
-    context->R1  = 0x01010101L;
-    context->R2  = 0x02020202L;
-    context->R3  = 0x03030303L;
-    context->R4  = 0x04040404L;
-    context->R5  = 0x05050505L;
-    context->R6  = 0x06060606L;
-    context->R7  = 0x07070707L;
-    context->R8  = 0x08080808L;
-    context->R9  = 0x09090909L;
-    context->R10 = 0x10101010L;
-    context->R11 = 0x11111111L;
-    context->R12 = 0x12121212L;
-    context->R13 = 0x13131313L;
-    context->R15 = 0xfffffffeL;
-    context->R16 = 0x16161616L;
-    context->R17 = 0x17171717L;
-    context->R18 = 0x18181818L;
-    context->R19 = 0x19191919L;
-    context->R20 = 0x20202020L;
-    context->R21 = 0x21212121L;
-    context->R22 = 0x22222222L;
-    context->R23 = 0x23232323L;
-    context->R24 = 0x24242424L;
-    context->R25 = 0x25252525L;
-    context->R26 = 0x26262626L;
-    context->R27 = 0x27272727L;
-    context->R28 = 0x28282828L;
-    context->R29 = 0x29292929L;
-    context->R30 = 0x30303030L;
-    context->R31 = 0x31313131L;
-    context->VR0 = 0x12345678L;
-    context->VR1 = 0x12345678L;
-    context->VR2 = 0x12345678L;
-    context->VR3 = 0x12345678L;
-    context->VR4 = 0x12345678L;
-    context->VR5 = 0x12345678L;
-    context->VR6 = 0x12345678L;
-    context->VR7 = 0x12345678L;
-    context->VR8 = 0x12345678L;
-    context->VR9 = 0x12345678L;
-    context->VR10 = 0x12345678L;
-    context->VR11 = 0x12345678L;
-    context->VR12 = 0x12345678L;
-    context->VR13 = 0x12345678L;
-    context->VR14 = 0x12345678L;
-    context->VR15 = 0x12345678L;
-    context->EPSR = 0x80000340L;
-}
-
-/* ****************************************************************************
- Function    : ArchTskStackInit
- Description : Task stack initialization function
- Input       : taskID     --- TaskID
-               stackSize  --- Total size of the stack
-               topStack   --- Top of task's stack
- Output      : None
- Return      : Context pointer
- **************************************************************************** */
-LITE_OS_SEC_TEXT_INIT VOID *ArchTskStackInit(UINT32 taskID, UINT32 stackSize, VOID *topStack)
-{
-    TaskContext *context = NULL;
-    context = (TaskContext *)(((UINTPTR)topStack + stackSize) - sizeof(TaskContext));
-    context->R0  = taskID;
-    ArchTskStackRegInit(context);
-    context->EPC = (UINT32)OsTaskEntry;
-    return (VOID *)context;
-}
-
-LITE_OS_SEC_TEXT_INIT UINT32 ArchStartSchedule(VOID)
-{
-    (VOID)LOS_IntLock();
-    OsSchedStart();
-    HalStartToRun();
-    return LOS_OK; /* never return */
-}
-
-
-VOID HalIrqEndCheckNeedSched(VOID)
-{
-}
-volatile int g_sysSchedCount = 0;
-int *p_sysSchedCount = &g_sysSchedCount;
-VOID ArchTaskSchedule(VOID)
-{
-    HalTaskContextSwitch();
-}
-
diff --git a/arch/csky/ck804ef/gcc/los_dispatch.S b/arch/csky/ck804ef/gcc/los_dispatch.S
deleted file mode 100755
index ef3ab99f..00000000
--- a/arch/csky/ck804ef/gcc/los_dispatch.S
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
- * Copyright (c) 2013-2020, Huawei Technologies Co., Ltd. All rights reserved.
- * Copyright (c) 2020-2021 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 <csi_config.h>
-
-#define VIC_TSPDR 0XE000EC08
-#define OS_TASK_STATUS_RUNNING    0x0010
-#define VIC_TSPDR                 0XE000EC08
-
-.section .text
-.align  2
-/********************************************************************
- * Functions: HalTaskContextSwitch
- *
- ********************************************************************/
-.global HalTaskContextSwitch
-.type   HalTaskContextSwitch, %function
-HalTaskContextSwitch:
-    lrw    r0, VIC_TSPDR
-    bgeni  r1, 0
-    stw    r1, (r0)
-	nop
-	nop
-	nop
-    rts
-    
-.type HalStartToRun, %function
-.global HalStartToRun
-HalStartToRun:
-    psrclr   ie
-    lrw      r4, g_losTask
-    ld.w     r4, (r4)
-    ld.w     sp, (r4)
-
-    ldw      r0, (sp, 192)
-    mtcr     r0, epc
-    ldw      r0, (sp, 188)
-    mtcr     r0, epsr
-
-    ldm      r0-r13, (sp)
-    ldw      r15, (sp, 56)
-    addi     sp, 60
-    ldm      r16-r31, (sp)
-    addi     sp, 64
-    fldms    vr0-vr15, (sp)
-    addi     sp, 72
-
-    rte
-
-.align  2
-.type tspend_handler, %function
-.global tspend_handler
-tspend_handler:
-
-    subi     sp, 196
-    stm      r0-r13, (sp)
-    stw      r15, (sp, 56)
-    addi     r0, sp, 60
-    stm      r16-r31, (r0)
-    addi     r0, 64
-    fstms    vr0-vr15, (r0)
-    mfcr     r1, epsr
-    stw      r1, (r0, 64)
-    mfcr     r1, epc
-    stw      r1, (r0, 68)
-
-    jbsr    OsSchedTaskSwitch
-    bez     r0, ret_con
-    
-    lrw    r2, g_losTask
-    ldw    r0, (r2)
-    stw    sp, (r0)
-
-    lrw    r3, g_losTask + 4
-    ldw    r0, (r3)
-    stw    r0, (r2)
-    
-#if 0
-    lrw     r4, g_sysSchedCount
-    ldw     r3, (r4, 0)
-    subi    r3, 1
-    stw     r3, (r4, 0)    
-#endif
-
-    ldw    sp, (r0)
-    
- ret_con:   
-    ldw      r0, (sp, 192)
-    mtcr     r0, epc
-    ldw      r0, (sp, 188)
-    mtcr     r0, epsr
-
-    ldm      r0-r13, (sp)
-    ldw      r15, (sp, 56)
-    addi     sp, 60
-    ldm      r16-r31, (sp)
-    addi     sp, 64
-    fldms    vr0-vr15, (sp)
-    addi     sp, 72
-
-    rte
-
diff --git a/arch/csky/ck804ef/gcc/los_interrupt.c b/arch/csky/ck804ef/gcc/los_interrupt.c
deleted file mode 100755
index 6afbdea2..00000000
--- a/arch/csky/ck804ef/gcc/los_interrupt.c
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
- * Copyright (c) 2020-2021 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_interrupt.h"
-#include <stdarg.h>
-#include <csi_core.h>
-#include "securec.h"
-#include "los_context.h"
-#include "los_arch_context.h"
-#include "los_arch_interrupt.h"
-#include "los_debug.h"
-#include "los_hook.h"
-#include "los_task.h"
-#include "los_sched.h"
-#include "los_memory.h"
-#include "los_membox.h"
-
-#define INT_OFFSET       6
-#define PRI_OFF_PER_INT  8
-#define PRI_PER_REG      4
-#define PRI_OFF_IN_REG   6
-#define PRI_BITS         2
-#define PRI_HI           0
-#define PRI_LOW          7
-#define MASK_8_BITS      0xFF
-#define MASK_32_BITS     0xFFFFFFFF
-#define BYTES_OF_128_INT 4
-
-#define OS_USER_HWI_MIN                 0
-#define OS_USER_HWI_MAX                 (LOSCFG_PLATFORM_HWI_LIMIT - 1)
-#define HWI_ALIGNSIZE                   0x400
-
-UINT32 volatile g_intCount = 0;
-CHAR g_trapStackBase[OS_TRAP_STACK_SIZE];
-
-STATIC VIC_TYPE *VIC_REG = (VIC_TYPE *)VIC_REG_BASE;
-
-UINT32 HwiNumValid(UINT32 num)
-{
-    return ((num) >= OS_USER_HWI_MIN) && ((num) <= OS_USER_HWI_MAX);
-}
-
-UINT32 HalGetPsr(VOID)
-{
-    UINT32 intSave;
-    __asm__ volatile("mfcr %0, psr" : "=r" (intSave) : : "memory");
-    return intSave;
-}
-
-UINT32 HalSetVbr(UINT32 intSave)
-{
-    __asm__ volatile("mtcr %0, vbr" : : "r"(intSave)  : "memory");
-    return intSave;
-}
-
-UINT32 ArchIntLock(VOID)
-{
-    UINT32 flags = __get_PSR();
-    __disable_irq();
-    return flags;
-}
-
-UINT32 ArchIntUnLock(VOID)
-{
-    UINT32 flags = __get_PSR();
-    __enable_irq();
-    return flags;
-}
-
-VOID ArchIntRestore(UINT32 intSave)
-{
-    __asm__ __volatile__(
-    "mtcr   %0, psr \n"
-    :
-    :"r" (intSave)
-    :"memory"
-    );
-}
-
-UINT32 ArchIntLocked(VOID)
-{
-    UINT32 intSave;
-    __asm__ volatile("mfcr %0, psr" : "=r" (intSave) : : "memory");
-    return !(intSave & (1 << INT_OFFSET));
-}
-
-UINT32 ArchIsIntActive(VOID)
-{
-    UINT32 intSave;
-
-    intSave = LOS_IntLock();
-    if (g_intCount > 0) {
-        LOS_IntRestore(intSave);
-        return 1;
-    }
-    LOS_IntRestore(intSave);
-    return 0;
-}
-
-#if (LOSCFG_PLATFORM_HWI_WITH_ARG == 1)
-
-/* *
- * @ingroup los_hwi
- * Set interrupt vector table.
- */
-VOID OsSetVector(UINT32 num, HWI_PROC_FUNC vector, VOID *arg)
-{
-    if ((num + OS_SYS_VECTOR_CNT) < OS_VECTOR_CNT) {
-        csi_vic_set_vector(num, vector);
-    }
-}
-#else
-/* *
- * @ingroup los_hwi
- * Set interrupt vector table.
- */
-VOID OsSetVector(UINT32 num, HWI_PROC_FUNC vector)
-{
-    if ((num + OS_SYS_VECTOR_CNT) < OS_VECTOR_CNT) {
-        csi_vic_set_vector(num, vector);
-    }
-}
-#endif
-
-int csi_kernel_intrpt_enter(void)
-{
-    UINT32 intSave;
-    intSave = LOS_IntLock();
-    g_intCount++;
-    LOS_IntRestore(intSave);
-    return 0;
-}
-int csi_kernel_intrpt_exit(void)
-{
-    UINT32 intSave;
-
-    intSave = LOS_IntLock();
-    if (g_intCount > 0) {
-        g_intCount--;
-    }
-    HalIrqEndCheckNeedSched();
-    LOS_IntRestore(intSave);
-    return 0;
-}
-
diff --git a/arch/csky/ck804ef/gcc/los_timer.c b/arch/csky/ck804ef/gcc/los_timer.c
deleted file mode 100755
index f23ae50d..00000000
--- a/arch/csky/ck804ef/gcc/los_timer.c
+++ /dev/null
@@ -1,144 +0,0 @@
-/*
- * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
- * Copyright (c) 2020-2021 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_timer.h"
-#include "los_config.h"
-#include "los_tick.h"
-#include "los_arch_interrupt.h"
-#include "los_debug.h"
-
-typedef struct {
-    UINT32 CTRL;
-    UINT32 LOAD;
-    UINT32 VAL;
-    UINT32 CALIB;
-} CORE_TIM_TYPE;
-
-#define CORE_TIM_BASE        (0xE000E010UL)
-#define SysTick              ((CORE_TIM_TYPE *)CORE_TIM_BASE)
-
-STATIC VIC_TYPE *VIC_REG = (VIC_TYPE *)VIC_REG_BASE;
-
-#define CORETIM_ENABLE       (1UL << 0)
-#define CORETIM_INTMASK      (1UL << 1)
-#define CORETIM_SOURCE       (1UL << 2)
-#define CORETIM_MODE         (1UL << 16)
-
-#define TIM_INT_NUM          25
-
-STATIC UINT32 SysTickStart(HWI_PROC_FUNC handler);
-STATIC VOID SysTickReload(UINT64 nextResponseTime);
-STATIC UINT64 SysTickCycleGet(UINT32 *period);
-STATIC VOID SysTickLock(VOID);
-STATIC VOID SysTickUnlock(VOID);
-
-STATIC ArchTickTimer g_archTickTimer = {
-    .freq = 0,
-    .irqNum = TIM_INT_NUM,
-    .init = SysTickStart,
-    .getCycle = SysTickCycleGet,
-    .reload = SysTickReload,
-    .lock = SysTickLock,
-    .unlock = SysTickUnlock,
-    .tickHandler = NULL,
-};
-
-/* ****************************************************************************
-Function    : HalTickStart
-Description : Configure Tick Interrupt Start
-Input       : none
-output      : none
-return      : LOS_OK - Success , or LOS_ERRNO_TICK_CFG_INVALID - failed
-**************************************************************************** */
-STATIC UINT32 SysTickStart(HWI_PROC_FUNC handler)
-{
-    ArchTickTimer *tick = &g_archTickTimer;
-
-    tick->freq = OS_SYS_CLOCK;
-
-    SysTick->LOAD = (OS_CYCLE_PER_TICK - 1);
-    SysTick->VAL = 0;
-    SysTick->CTRL |= (CORETIM_SOURCE | CORETIM_ENABLE | CORETIM_INTMASK);
-
-    VIC_REG->IWER[0] = 0x1 << TIM_INT_NUM;
-
-    return LOS_OK;
-}
-
-STATIC VOID SysTickReload(UINT64 nextResponseTime)
-{
-    SysTick->CTRL &= ~CORETIM_ENABLE;
-    SysTick->LOAD = (UINT32)(nextResponseTime - 1UL); /* set reload register */
-    SysTick->VAL = 0UL; /* Load the SysTick Counter Value */
-    SysTick->CTRL |= CORETIM_ENABLE;
-}
-
-STATIC UINT64 SysTickCycleGet(UINT32 *period)
-{
-    UINT32 hwCycle;
-    UINT32 intSave = LOS_IntLock();
-    *period = SysTick->LOAD;
-    hwCycle = *period - SysTick->VAL;
-    LOS_IntRestore(intSave);
-    return (UINT64)hwCycle;
-}
-
-STATIC VOID SysTickLock(VOID)
-{
-    SysTick->CTRL &= ~CORETIM_ENABLE;
-}
-
-STATIC VOID SysTickUnlock(VOID)
-{
-    SysTick->CTRL |= CORETIM_ENABLE;
-}
-
-ArchTickTimer *ArchSysTickTimerGet(VOID)
-{
-    return &g_archTickTimer;
-}
-
-VOID Wfi(VOID)
-{
-    __asm__ volatile("wait");
-}
-
-VOID Dsb(VOID)
-{
-    __asm__ volatile("sync" : : : "memory");
-}
-
-UINT32 ArchEnterSleep(VOID)
-{
-    Dsb();
-    Wfi();
-    return LOS_OK;
-}
diff --git a/arch/csky/v2/gcc/los_arch_context.h b/arch/csky/v2/gcc/los_arch_context.h
index bbff2cf3..04c25c67 100644
--- a/arch/csky/v2/gcc/los_arch_context.h
+++ b/arch/csky/v2/gcc/los_arch_context.h
@@ -59,13 +59,33 @@ typedef struct TagTskContext {
     UINT32 R12;
     UINT32 R13;
     UINT32 R15;
+#ifdef CPU_CK804
+    UINT32 R16;
+    UINT32 R17;
+    UINT32 R18;
+    UINT32 R19;
+    UINT32 R20;
+    UINT32 R21;
+    UINT32 R22;
+    UINT32 R23;
+    UINT32 R24;
+    UINT32 R25;
+    UINT32 R26;
+    UINT32 R27;
+    UINT32 R28;
+    UINT32 R29;
+    UINT32 R30;
+    UINT32 R31;
+#endif
     UINT32 EPSR;
     UINT32 EPC;
 } TaskContext;
 
 VOID HalStartToRun(VOID);
 VOID HalTaskContextSwitch(VOID);
+#ifndef CPU_CK804
 VOID HalIrqEndCheckNeedSched(VOID);
+#endif
 
 #ifdef __cplusplus
 #if __cplusplus
diff --git a/arch/csky/v2/gcc/los_arch_interrupt.h b/arch/csky/v2/gcc/los_arch_interrupt.h
index c9db621a..bcd5728e 100644
--- a/arch/csky/v2/gcc/los_arch_interrupt.h
+++ b/arch/csky/v2/gcc/los_arch_interrupt.h
@@ -82,7 +82,7 @@ typedef VOID (**HWI_VECTOR_FUNC)(VOID);
  * @ingroup los_arch_interrupt
  * Count of interrupts.
  */
-extern UINT32 g_intCount;
+extern volatile UINT32 g_intCount;
 
 /* *
  * @ingroup los_arch_interrupt
diff --git a/arch/csky/v2/gcc/los_context.c b/arch/csky/v2/gcc/los_context.c
index 6a82b9cd..7fc61e49 100644
--- a/arch/csky/v2/gcc/los_context.c
+++ b/arch/csky/v2/gcc/los_context.c
@@ -38,7 +38,9 @@
 #include "los_interrupt.h"
 #include "los_debug.h"
 
+#ifndef CPU_CK804
 STATIC UINT32 g_sysNeedSched = FALSE;
+#endif
 
 /* ****************************************************************************
  Function    : ArchInit
@@ -93,8 +95,29 @@ LITE_OS_SEC_TEXT_INIT VOID *ArchTskStackInit(UINT32 taskID, UINT32 stackSize, VO
     context->R11 = 0x11111111L;
     context->R12 = 0x12121212L;
     context->R13 = 0x13131313L;
+#ifdef CPU_CK804
+    context->R15 = (UINT32)ArchSysExit;
+    context->R16 = 0x16161616L;
+    context->R17 = 0x17171717L;
+    context->R18 = 0x18181818L;
+    context->R19 = 0x19191919L;
+    context->R20 = 0x20202020L;
+    context->R21 = 0x21212121L;
+    context->R22 = 0x22222222L;
+    context->R23 = 0x23232323L;
+    context->R24 = 0x24242424L;
+    context->R25 = 0x25252525L;
+    context->R26 = 0x26262626L;
+    context->R27 = 0x27272727L;
+    context->R28 = 0x28282828L;
+    context->R29 = 0x29292929L;
+    context->R30 = 0x30303030L;
+    context->R31 = 0x31313131L;
+    context->EPSR = 0x80000340L;
+#else
     context->R15 = (UINT32)ArchSysExit;
     context->EPSR = 0xe0000144L;
+#endif
     context->EPC = (UINT32)OsTaskEntry;
     return (VOID *)context;
 }
@@ -107,6 +130,7 @@ LITE_OS_SEC_TEXT_INIT UINT32 ArchStartSchedule(VOID)
     return LOS_OK; /* never return */
 }
 
+#ifndef CPU_CK804
 VOID HalIrqEndCheckNeedSched(VOID)
 {
     if (g_sysNeedSched && g_taskScheduled && LOS_CHECK_SCHEDULE) {
@@ -132,3 +156,10 @@ VOID ArchTaskSchedule(VOID)
     LOS_IntRestore(intSave);
     return;
 }
+#else
+VOID ArchTaskSchedule(VOID)
+{
+    HalTaskContextSwitch();
+}
+#endif
+
diff --git a/arch/csky/v2/gcc/los_dispatch.S b/arch/csky/v2/gcc/los_dispatch.S
index 3ce7bb07..7c89e880 100644
--- a/arch/csky/v2/gcc/los_dispatch.S
+++ b/arch/csky/v2/gcc/los_dispatch.S
@@ -32,6 +32,89 @@
 #define OS_TASK_STATUS_RUNNING    0x0010
 #define VIC_TSPDR                 0XE000EC08
 
+#ifdef CPU_CK804
+.section .text
+.align  2
+.type HalStartToRun, %function
+.global HalStartToRun
+HalStartToRun:
+    lrw    r1, g_losTask
+    lrw    r2, g_losTask + 4
+
+    ldw    r0, (r2)
+
+    st.w   r0, (r1)
+    st.w   r0, (r2)
+
+    ldw    sp, (r0)
+
+    ldw    r0, (sp, 128)
+    mtcr   r0, epc
+    ldw    r0, (sp, 124)
+    mtcr   r0, epsr
+    ldw    r15, (sp, 56)
+    ldm    r0-r13, (sp)
+    addi     sp, 60
+    ldm      r16-r31, (sp)
+    addi     sp, 72
+
+    rte
+
+.align  2
+.type HalTaskContextSwitch, %function
+.global HalTaskContextSwitch
+HalTaskContextSwitch:
+    lrw    r0, VIC_TSPDR
+    bgeni  r1, 0
+    stw    r1, (r0)
+    nop
+    nop
+    nop
+    rts
+    
+.align  2
+.type tspend_handler, %function
+.global tspend_handler
+tspend_handler:
+
+    subi   sp, 132
+    stm    r0-r13, (sp)
+    stw    r15, (sp, 56)
+    addi     r0, sp, 60
+    stm      r16-r31, (r0)
+    mfcr     r1, epsr
+    stw    r1, (sp, 124)
+    mfcr     r1, epc
+    stw    r1, (sp, 128)
+
+    jbsr    OsSchedTaskSwitch
+    bez     r0, ret_con
+    
+    lrw    r2, g_losTask
+    ldw    r0, (r2)
+    stw    sp, (r0)
+
+    lrw    r3, g_losTask + 4
+    ldw    r0, (r3)
+    stw    r0, (r2)
+
+    ldw    sp, (r0)
+    
+ ret_con:   
+    ldw    r0, (sp, 128)
+    mtcr   r0, epc
+    ldw    r0, (sp, 124)
+    mtcr   r0, epsr
+    ldw    r15, (sp, 56)
+    ldm    r0-r13, (sp)
+    addi     sp, 60
+    ldm      r16-r31, (sp)
+
+    addi   sp, 72
+
+    rte
+    
+#else
 .section .text
 .align  2
 .type HalStartToRun, %function
@@ -87,3 +170,4 @@ HalTaskContextSwitch:
 
     rte
 
+#endif
diff --git a/arch/csky/v2/gcc/los_exc.S b/arch/csky/v2/gcc/los_exc.S
index 23f2a33f..46fe8b24 100644
--- a/arch/csky/v2/gcc/los_exc.S
+++ b/arch/csky/v2/gcc/los_exc.S
@@ -32,6 +32,57 @@
 .import HalExcHandleEntry
 .extern g_trapStackBase
 
+#ifdef CPU_CK804
+.section .text
+.align  2
+.global HandleEntry
+HandleEntry:
+    mov    r10, sp
+    lrw    r14, g_trapStackBase
+
+    stm    r0-r15, (sp)
+    stw    r10, (sp, 56)
+    addi     r0, sp, 64
+    stm      r16-r31, (r0)
+    mfcr   r0, epsr
+    stw    r0, (sp, 128)
+    mfcr   r0, epc
+    stw    r0, (sp, 132)
+    mov    r0, sp
+
+    mfcr   r1, epc
+
+    mov    sp, r10
+    lrw    r2, HalExcHandleEntry
+    jmp    r2
+
+.section .text
+.align  2
+.global IrqEntry
+IrqEntry:
+    psrset  ee
+    subi   sp, 136
+    stm    r0-r15, (sp)
+    addi     r0, sp, 64
+    stm      r16-r31, (r0)
+    mfcr   r0, epsr
+    stw    r0, (sp, 128)
+    mfcr   r0, epc
+    stw    r0, (sp, 132)
+
+    jbsr   HalInterrupt
+
+    ldw    r0, (sp, 132)
+    mtcr   r0, epc
+    ldw    r0, (sp, 128)
+    bseti  r0, r0, 6
+    mtcr   r0, epsr
+    ldm    r0-r15, (sp)
+    addi     sp, 64
+    ldm      r16-r31, (sp)
+    addi   sp, 72
+    rte
+#else
 .section .text
 .align  2
 .global HandleEntry
@@ -75,3 +126,4 @@ IrqEntry:
     ldm    r0-r15, (sp)
     addi   sp, 72
     rte
+#endif
\ No newline at end of file
diff --git a/arch/csky/v2/gcc/los_interrupt.c b/arch/csky/v2/gcc/los_interrupt.c
index 7131fd40..2bea0454 100644
--- a/arch/csky/v2/gcc/los_interrupt.c
+++ b/arch/csky/v2/gcc/los_interrupt.c
@@ -52,13 +52,12 @@
 #define MASK_8_BITS      0xFF
 #define MASK_32_BITS     0xFFFFFFFF
 #define BYTES_OF_128_INT 4
-#define TIM_INT_NUM      1
 
 #define OS_USER_HWI_MIN                 0
 #define OS_USER_HWI_MAX                 (LOSCFG_PLATFORM_HWI_LIMIT - 1)
 #define HWI_ALIGNSIZE                   0x400
 
-UINT32 g_intCount = 0;
+UINT32 volatile g_intCount = 0;
 CHAR g_trapStackBase[OS_TRAP_STACK_SIZE];
 
 VIC_TYPE *VIC_REG = (VIC_TYPE *)VIC_REG_BASE;
@@ -334,7 +333,9 @@ LITE_OS_SEC_TEXT VOID HalInterrupt(VOID)
 
     intSave = LOS_IntLock();
     g_intCount--;
+#ifndef CPU_CK804
     HalIrqEndCheckNeedSched();
+#endif
     LOS_IntRestore(intSave);
 }
 
@@ -586,6 +587,10 @@ WEAK VOID __stack_chk_fail(VOID)
               __builtin_return_address(0));
 }
 
+WEAK void HalHwiHandleReInit(UINT32 hwiFormAddr)
+{
+}
+
 /* ****************************************************************************
  Function    : HalHwiInit
  Description : initialization of the hardware interrupt
@@ -604,6 +609,7 @@ LITE_OS_SEC_TEXT_INIT VOID HalHwiInit(VOID)
     for (i = OS_SYS_VECTOR_CNT; i < (LOSCFG_PLATFORM_HWI_LIMIT + OS_SYS_VECTOR_CNT); i++) {
         g_hwiForm[i] = (HWI_PROC_FUNC)IrqEntry;
     }
+    HalHwiHandleReInit((UINT32)&g_hwiForm);
 
     HalSetVbr((UINT32)&g_hwiForm);
     for (int i = 0; i < BYTES_OF_128_INT; i++) {
diff --git a/arch/csky/v2/gcc/los_timer.c b/arch/csky/v2/gcc/los_timer.c
index f572c12a..99bd2b69 100644
--- a/arch/csky/v2/gcc/los_timer.c
+++ b/arch/csky/v2/gcc/los_timer.c
@@ -50,7 +50,11 @@ typedef struct {
 #define CORETIM_SOURCE       (1UL << 2)
 #define CORETIM_MODE         (1UL << 16)
 
+#ifdef CPU_CK804
+#define TIM_INT_NUM          25
+#else
 #define TIM_INT_NUM          1
+#endif
 
 STATIC UINT32 SysTickStart(HWI_PROC_FUNC handler);
 STATIC UINT64 SysTickReload(UINT64 nextResponseTime);