86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
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* Copyright (C) 2017-2019 Alibaba Group Holding Limited
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2020-08-20 zx.chen CSI Device System Source File
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*/
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#include <csi_config.h>
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#include <soc.h>
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#include <csi_core.h>
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#include <drv_irq.h>
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#ifndef CONFIG_SYSTICK_HZ
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#define CONFIG_SYSTICK_HZ 100
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#endif
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int g_system_clock = IHS_VALUE;
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extern int32_t g_top_irqstack;
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extern void irq_vectors_init(void);
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extern void mm_heap_initialize(void);
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int SystemCoreClock = IHS_VALUE; /* System Core Clock Frequency */
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extern int __Vectors;
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void SystemCoreClockUpdate(void)
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{
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SystemCoreClock = IHS_VALUE;
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}
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static void _system_init_for_kernel(void)
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{
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irq_vectors_init();
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csi_coret_config(drv_get_sys_freq() / CONFIG_SYSTICK_HZ, CORET_IRQn); //10ms
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drv_irq_enable(CORET_IRQn);
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}
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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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int i;
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/* enable mstatus FS */
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#if ((CONFIG_CPU_E906F==1) || (CONFIG_CPU_E906FD==1))
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uint32_t mstatus = __get_MSTATUS();
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mstatus |= (1 << 13);
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__set_MSTATUS(mstatus);
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#endif
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/* enable mxstatus THEADISAEE */
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uint32_t mxstatus = __get_MXSTATUS();
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mxstatus |= (1 << 22);
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/* enable mxstatus MM */
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#if ((CONFIG_CPU_E906==1) || (CONFIG_CPU_E906F==1) || (CONFIG_CPU_E906FD==1))
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mxstatus |= (1 << 15);
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#endif
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__set_MXSTATUS(mxstatus);
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/* get interrupt level from info */
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CLIC->CLICCFG = (((CLIC->CLICINFO & CLIC_INFO_CLICINTCTLBITS_Msk) >> CLIC_INFO_CLICINTCTLBITS_Pos) << CLIC_CLICCFG_NLBIT_Pos);
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for (i = 0; i < 64; i++)
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{
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CLIC->CLICINT[i].IP = 0;
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CLIC->CLICINT[i].ATTR = 1; /* use vector interrupt */
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}
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/* tspend use positive interrupt */
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CLIC->CLICINT[Machine_Software_IRQn].ATTR = 0x3;
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csi_dcache_enable();
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csi_icache_enable();
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drv_irq_enable(Machine_Software_IRQn);
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_system_init_for_kernel();
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}
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