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/*
* Copyright (c) 2013, 2021 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp/irq-generic.h>
#include <mcf548x/mcf548x.h>
void asm_default_interrupt(void);
typedef void (*void_func)(void);
static uint32_t vector_to_reg(rtems_vector_number vector)
{
return ((vector + 32U) >> 5) & 0x1;
}
static uint32_t vector_to_bit(rtems_vector_number vector)
{
return 1U << (vector & 0x1fU);
}
static volatile uint32_t *vector_to_imr(rtems_vector_number vector)
{
volatile uint32_t *imr = &MCF548X_INTC_IMRH;
return &imr[vector_to_reg(vector)];
}
static rtems_vector_number exception_vector_to_vector(
rtems_vector_number exception_vector
)
{
return exception_vector - 64U;
}
static rtems_vector_number vector_to_exception_vector(
rtems_vector_number vector
)
{
return vector + 64U;
}
rtems_status_code bsp_interrupt_get_attributes(
rtems_vector_number vector,
rtems_interrupt_attributes *attributes
)
{
return RTEMS_SUCCESSFUL;
}
rtems_status_code bsp_interrupt_is_pending(
rtems_vector_number vector,
bool *pending
)
{
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
bsp_interrupt_assert(pending != NULL);
*pending = false;
return RTEMS_UNSATISFIED;
}
rtems_status_code bsp_interrupt_raise(rtems_vector_number vector)
{
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
return RTEMS_UNSATISFIED;
}
rtems_status_code bsp_interrupt_clear(rtems_vector_number vector)
{
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
return RTEMS_UNSATISFIED;
}
rtems_status_code bsp_interrupt_vector_is_enabled(
rtems_vector_number vector,
bool *enabled
)
{
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
bsp_interrupt_assert(enabled != NULL);
*enabled = false;
return RTEMS_UNSATISFIED;
}
rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector)
{
volatile uint32_t *imr = vector_to_imr(vector);
uint32_t bit = vector_to_bit(vector);
rtems_interrupt_level level;
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
rtems_interrupt_disable(level);
*imr &= ~bit;
rtems_interrupt_enable(level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector)
{
volatile uint32_t *imr = vector_to_imr(vector);
uint32_t bit = vector_to_bit(vector);
rtems_interrupt_level level;
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
rtems_interrupt_disable(level);
*imr |= bit;
rtems_interrupt_enable(level);
return RTEMS_SUCCESSFUL;
}
static void set_exception_handler(rtems_vector_number vector, void_func handler)
{
void **vbr;
void_func *exception_table;
m68k_get_vbr(vbr);
exception_table = (void_func *)vbr;
exception_table[vector_to_exception_vector(vector)] = handler;
}
static void dispatch_handler(rtems_vector_number exception_vector)
{
bsp_interrupt_handler_dispatch_unchecked(
exception_vector_to_vector(exception_vector)
);
}
void mcf548x_interrupt_vector_install(rtems_vector_number vector)
{
_ISR_Vector_table[vector_to_exception_vector(vector)]
= dispatch_handler;
set_exception_handler(vector, _ISR_Handler);
}
void mcf548x_interrupt_vector_remove(rtems_vector_number vector)
{
set_exception_handler(vector, asm_default_interrupt);
}
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