rt-thread/libcpu/aarch64/cortex-a72/interrupt.c

119 lines
2.6 KiB
C

/*
* 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);
}