/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2006-08-23 Bernard first version */ #include <rtthread.h> #include "AT91SAM7S.h" #define MAX_HANDLERS 32 extern rt_uint32_t rt_interrupt_nest; rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread; rt_uint32_t rt_thread_switch_interrupt_flag; /** * @addtogroup AT91SAM7 */ /*@{*/ void rt_hw_interrupt_handler(int vector) { rt_kprintf("Unhandled interrupt %d occured!!!\n", vector); } /** * This function will initialize hardware interrupt */ void rt_hw_interrupt_init() { rt_base_t index; for (index = 0; index < MAX_HANDLERS; index ++) { AT91C_AIC_SVR(index) = (rt_uint32_t)rt_hw_interrupt_handler; } /* 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) { /* disable interrupt */ AT91C_AIC_IDCR = 1 << vector; /* clear interrupt */ AT91C_AIC_ICCR = 1 << vector; } /** * This function will un-mask a interrupt. * @param vector the interrupt number */ void rt_hw_interrupt_umask(int vector) { AT91C_AIC_IECR = 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 >= 0 && vector < MAX_HANDLERS) { if (*old_handler != RT_NULL) *old_handler = (rt_isr_handler_t)AT91C_AIC_SVR(vector); if (new_handler != RT_NULL) AT91C_AIC_SVR(vector) = (rt_uint32_t)new_handler; } } /*@}*/