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55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/*
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* Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/******************************************************************************
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* @file system.c
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* @brief CSI Device System Source File
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* @version V1.0
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* @date 02. June 2017
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******************************************************************************/
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#include <csi_config.h>
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#include "csi_core.h"
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/**
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* @brief initialize the system
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* Initialize the psr and vbr.
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* @param None
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* @return None
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*/
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void SystemInit(void)
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{
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__set_VBR((uint32_t) & (irq_vectors));
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#if defined(CONFIG_SEPARATE_IRQ_SP) && !defined(CONFIG_KERNEL_NONE)
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/* 801 not supported */
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extern int32_t g_top_irqstack;
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__set_Int_SP((uint32_t)&g_top_irqstack);
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__set_CHR(__get_CHR() | CHR_ISE_Msk);
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VIC->TSPR = 0xFF;
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#endif
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__set_CHR(__get_CHR() | CHR_IAE_Msk);
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/* Clear active and pending IRQ */
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VIC->IABR[0] = 0x0;
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VIC->ICPR[0] = 0xFFFFFFFF;
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#ifdef CONFIG_KERNEL_NONE
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__enable_excp_irq();
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#endif
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}
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