/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2021-10-19 JasonHu first version */ #include <rthw.h> #include <rtthread.h> #include "rt_interrupt.h" #include "riscv.h" #include "plic.h" extern rt_uint32_t rt_interrupt_nest; extern rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread; extern rt_uint32_t rt_thread_switch_interrupt_flag; struct rt_irq_desc isr_table[INTERRUPTS_MAX]; static void rt_hw_interrupt_handler(int vector, void *param) { rt_kprintf("Unhandled interrupt %d occured!!!\n", vector); } /** * This function will initialize hardware interrupt */ void rt_hw_interrupt_init(void) { /* init interrupt controller */ plic_init(); rt_int32_t idx; rt_memset(isr_table, 0x00, sizeof(isr_table)); for (idx = 0; idx < INTERRUPTS_MAX; idx++) { isr_table[idx].handler = 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) { if ((vector < 0) || (vector > IRQ_MAX_NR)) { return; } plic_disable_irq(vector); } /** * This function will un-mask a interrupt. * @param vector the interrupt number */ void rt_hw_interrupt_umask(int vector) { if ((vector < 0) || (vector > IRQ_MAX_NR)) { return; } plic_enable_irq(vector); } /** * This function will install a interrupt service routine to a interrupt. * @param vector the interrupt number * @param handler the interrupt service routine to be installed * @param param the interrupt service function parameter * @param name the interrupt name * @return old handler */ rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler, void *param, const char *name) { rt_isr_handler_t old_handler = RT_NULL; if ((vector < 0) || (vector > IRQ_MAX_NR)) { return old_handler; } old_handler = isr_table[IRQ_OFFSET + vector].handler; #ifdef RT_USING_INTERRUPT_INFO rt_strncpy(isr_table[IRQ_OFFSET + vector].name, name, RT_NAME_MAX); #endif /* RT_USING_INTERRUPT_INFO */ isr_table[IRQ_OFFSET + vector].handler = handler; isr_table[IRQ_OFFSET + vector].param = param; return old_handler; }