/* * Copyright (c) 2014 Wind River Systems, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @file * @brief ARCv2 Interrupt Unit device driver * * The ARCv2 interrupt unit has 16 allocated exceptions associated with * vectors 0 to 15 and 240 interrupts associated with vectors 16 to 255. * The interrupt unit is optional in the ARCv2-based processors. When * building a processor, you can configure the processor to include an * interrupt unit. The ARCv2 interrupt unit is highly programmable. */ #include #include #include extern void *_VectorTable; void _arc_v2_irq_unit_init(void) { int irq; /* the interrupt index */ for (irq = 16; irq < CONFIG_NUM_IRQS; irq++) { _arc_v2_aux_reg_write(_ARC_V2_IRQ_SELECT, irq); _arc_v2_aux_reg_write(_ARC_V2_IRQ_PRIORITY, (CONFIG_NUM_IRQ_PRIO_LEVELS-1)); /* lowest priority */ _arc_v2_aux_reg_write(_ARC_V2_IRQ_ENABLE, _ARC_V2_INT_DISABLE); _arc_v2_aux_reg_write(_ARC_V2_IRQ_TRIGGER, _ARC_V2_INT_LEVEL); } } void _arc_v2_irq_unit_int_eoi(int irq) { _arc_v2_aux_reg_write(_ARC_V2_IRQ_SELECT, irq); _arc_v2_aux_reg_write(_ARC_V2_IRQ_PULSE_CANCEL, 1); } void _arc_v2_irq_unit_trigger_set(int irq, unsigned int trigger) { _arc_v2_aux_reg_write(_ARC_V2_IRQ_SELECT, irq); _arc_v2_aux_reg_write(_ARC_V2_IRQ_TRIGGER, trigger); } unsigned int _arc_v2_irq_unit_trigger_get(int irq) { _arc_v2_aux_reg_write(_ARC_V2_IRQ_SELECT, irq); return _arc_v2_aux_reg_read(_ARC_V2_IRQ_TRIGGER); }