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/*
* Copyright (c) 2015 Travis Geiselbrecht
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <reg.h>
#include <err.h>
#include <trace.h>
#include <lk/init.h>
#include <kernel/thread.h>
#include <platform.h>
#include <platform/interrupts.h>
#include <platform/debug.h>
#include <sys/types.h>
#include <target/microblaze-config.h>
#define LOCAL_TRACE 0
#define R_ISR 0
#define R_IPR 1
#define R_IER 2
#define R_IAR 3
#define R_SIE 4
#define R_CIE 5
#define R_IVR 6
#define R_MER 7
#define R_MAX 8
#define INTC_REG(reg) (*REG32(INTC_BASEADDR + (reg) * 4))
static spin_lock_t lock;
struct int_handler_struct {
int_handler handler;
void *arg;
};
static struct int_handler_struct int_handler_table[MAX_INT];
void register_int_handler(unsigned int vector, int_handler handler, void *arg)
{
LTRACEF("vector %u, handler %p, arg %p\n", vector, handler, arg);
if (vector >= MAX_INT)
return;
spin_lock_saved_state_t state;
spin_lock_irqsave(&lock, state);
int_handler_table[vector].handler = handler;
int_handler_table[vector].arg = arg;
spin_unlock_irqrestore(&lock, state);
}
status_t mask_interrupt(unsigned int vector)
{
LTRACEF("vector %u\n", vector);
INTC_REG(R_CIE) = 1 << vector;
return NO_ERROR;
}
status_t unmask_interrupt(unsigned int vector)
{
LTRACEF("vector %u\n", vector);
INTC_REG(R_SIE) = 1 << vector;
return NO_ERROR;
}
enum handler_return platform_irq_handler(void)
{
enum handler_return ret = INT_NO_RESCHEDULE;
uint irq = INTC_REG(R_IVR);
LTRACEF("irq %u, IPR 0x%x, ISR 0x%x\n", irq, INTC_REG(R_IPR), INTC_REG(R_ISR));
if (irq < MAX_INT && int_handler_table[irq].handler)
ret = int_handler_table[irq].handler(int_handler_table[irq].arg);
INTC_REG(R_IAR) = 1 << irq;
return ret;
}
static void intc_init(uint level)
{
LTRACE;
INTC_REG(R_CIE) = 0xffffffff;
INTC_REG(R_MER) = 0x3;
}
LK_INIT_HOOK(intc, intc_init, LK_INIT_LEVEL_PLATFORM_EARLY);
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