123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118 |
- /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date Author Notes
- * 2020-04-16 bigmagic first version
- */
- #include <rthw.h>
- #include <rtthread.h>
- #include <gic_pl400.h>
- #include <board.h>
- #include <armv8.h>
- #define MAX_HANDLERS 256
- #define GIC_ACK_INTID_MASK 0x000003ff
- #ifdef RT_USING_SMP
- #define rt_interrupt_nest rt_cpu_self()->irq_nest
- #else
- extern volatile rt_uint8_t rt_interrupt_nest;
- #endif
- extern int system_vectors;
- /* exception and interrupt handler table */
- struct rt_irq_desc isr_table[MAX_HANDLERS];
- rt_ubase_t rt_interrupt_from_thread;
- rt_ubase_t rt_interrupt_to_thread;
- rt_ubase_t rt_thread_switch_interrupt_flag;
- void rt_hw_vector_init(void)
- {
- rt_hw_set_current_vbar((rt_ubase_t)&system_vectors); // cpu_gcc.S
- }
- /**
- * This function will initialize hardware interrupt
- */
- void rt_hw_interrupt_init(void)
- {
- rt_uint32_t gic_cpu_base = 0;
- rt_uint32_t gic_dist_base = 0;
- /* initialize ARM GIC */
- gic_dist_base = GIC_PL400_DISTRIBUTOR_PPTR;
- gic_cpu_base = GIC_PL400_CONTROLLER_PPTR;
- arm_gic_dist_init(0, gic_dist_base, 0);
- arm_gic_cpu_init(0, gic_cpu_base);
- }
- /**
- * 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
- */
- 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 < MAX_HANDLERS)
- {
- old_handler = isr_table[vector].handler;
- if (handler != RT_NULL)
- {
- #ifdef RT_USING_INTERRUPT_INFO
- rt_strncpy(isr_table[vector].name, name, RT_NAME_MAX);
- #endif /* RT_USING_INTERRUPT_INFO */
- isr_table[vector].handler = handler;
- isr_table[vector].param = param;
- }
- }
- return old_handler;
- }
- /**
- * This function will mask a interrupt.
- * @param vector the interrupt number
- */
- void rt_hw_interrupt_mask(int vector)
- {
- arm_gic_mask(0, vector);
- }
- /**
- * This function will un-mask a interrupt.
- * @param vector the interrupt number
- */
- void rt_hw_interrupt_umask(int vector)
- {
- arm_gic_umask(0, vector);
- }
- /**
- * This function returns the active interrupt number.
- * @param none
- */
- int rt_hw_interrupt_get_irq(void)
- {
- return arm_gic_get_active_irq(0) & GIC_ACK_INTID_MASK;
- }
- /**
- * This function acknowledges the interrupt.
- * @param vector the interrupt number
- */
- void rt_hw_interrupt_ack(int vector)
- {
- arm_gic_ack(0, vector);
- }
|