| /* |
| * 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 <nanokernel.h> |
| #include <arch/cpu.h> |
| #include <board.h> |
| 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); |
| } |