/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2006-09-06 XuXinming first version * 2006-09-15 Bernard add interrupt bank 0..3 for more effective * in irq trap */ #include <rtthread.h> #include "s3c44b0.h" #define MAX_HANDLERS 26 extern rt_uint32_t rt_interrupt_nest; /* exception and interrupt handler table */ rt_isr_handler_t isr_table[MAX_HANDLERS]; rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread; rt_uint32_t rt_thread_switch_interrupt_flag; unsigned char interrupt_bank0[256]; unsigned char interrupt_bank1[256]; unsigned char interrupt_bank2[256]; unsigned char interrupt_bank3[256]; /** * @addtogroup S3C44B0 */ /*@{*/ void rt_hw_interrupt_handle(int vector) { rt_kprintf("Unhandled interrupt %d occured!!!\n", vector); } /** * This function will initialize hardware interrupt */ void rt_hw_interrupt_init() { register int i; /* all interrupt disabled include global bit */ INTMSK = 0x07ffffff; /* clear pending register */ I_ISPC = 0x03ffffff; /* non-vector mode IRQ enable */ INTCON = 0x5; /* all IRQ mode */ INTMOD = 0x0; /* init exceptions table */ for(i=0; i<MAX_HANDLERS; i++) { isr_table[i] = rt_hw_interrupt_handle; } for ( i = 0; i < 256; i++) { interrupt_bank0[i] = 0; interrupt_bank1[i] = 0; interrupt_bank2[i] = 0; interrupt_bank3[i] = 0; } /* setup interrupt bank table */ interrupt_bank0[1] = 0; interrupt_bank0[2] = 1; interrupt_bank0[4] = 2; interrupt_bank0[8] = 3; interrupt_bank0[16] = 4; interrupt_bank0[32] = 5; interrupt_bank0[64] = 6; interrupt_bank0[128]= 7; interrupt_bank1[1] = 8; interrupt_bank1[2] = 9; interrupt_bank1[4] = 10; interrupt_bank1[8] = 11; interrupt_bank1[16] = 12; interrupt_bank1[32] = 13; interrupt_bank1[64] = 14; interrupt_bank1[128]= 15; interrupt_bank2[1] = 16; interrupt_bank2[2] = 17; interrupt_bank2[4] = 18; interrupt_bank2[8] = 19; interrupt_bank2[16] = 20; interrupt_bank2[32] = 21; interrupt_bank2[64] = 22; interrupt_bank2[128]= 23; interrupt_bank3[1] = 24; interrupt_bank3[2] = 25; /* init interrupt nest, and context in thread sp */ rt_interrupt_nest = 0; rt_interrupt_from_thread = 0; rt_interrupt_to_thread = 0; rt_thread_switch_interrupt_flag = 0; } /** * This function will mask a interrupt. * @param vector the interrupt number */ void rt_hw_interrupt_mask(int vector) { INTMSK |= 1 << vector; } /** * This function will un-mask a interrupt. * @param vector the interrupt number */ void rt_hw_interrupt_umask(int vector) { INTMSK &= ~(1 << vector); } /** * This function will install a interrupt service routine to a interrupt. * @param vector the interrupt number * @param new_handler the interrupt service routine to be installed * @param old_handler the old interrupt service routine */ void rt_hw_interrupt_install(int vector, rt_isr_handler_t new_handler, rt_isr_handler_t *old_handler) { if(vector < MAX_HANDLERS) { if (old_handler != RT_NULL) *old_handler = isr_table[vector]; if (new_handler != RT_NULL) isr_table[vector] = new_handler; } } /*@}*/