| 1 |
8 |
alfik |
/******************************************************************************
|
| 2 |
|
|
* *
|
| 3 |
|
|
* License Agreement *
|
| 4 |
|
|
* *
|
| 5 |
|
|
* Copyright (c) 2009 Altera Corporation, San Jose, California, USA. *
|
| 6 |
|
|
* All rights reserved. *
|
| 7 |
|
|
* *
|
| 8 |
|
|
* Permission is hereby granted, free of charge, to any person obtaining a *
|
| 9 |
|
|
* copy of this software and associated documentation files (the "Software"), *
|
| 10 |
|
|
* to deal in the Software without restriction, including without limitation *
|
| 11 |
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
|
| 12 |
|
|
* and/or sell copies of the Software, and to permit persons to whom the *
|
| 13 |
|
|
* Software is furnished to do so, subject to the following conditions: *
|
| 14 |
|
|
* *
|
| 15 |
|
|
* The above copyright notice and this permission notice shall be included in *
|
| 16 |
|
|
* all copies or substantial portions of the Software. *
|
| 17 |
|
|
* *
|
| 18 |
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
|
| 19 |
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
|
| 20 |
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
|
| 21 |
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
|
| 22 |
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
|
| 23 |
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
|
| 24 |
|
|
* DEALINGS IN THE SOFTWARE. *
|
| 25 |
|
|
* *
|
| 26 |
|
|
* This agreement shall be governed in all respects by the laws of the State *
|
| 27 |
|
|
* of California and by the laws of the United States of America. *
|
| 28 |
|
|
* *
|
| 29 |
|
|
******************************************************************************/
|
| 30 |
|
|
#include "system.h"
|
| 31 |
|
|
|
| 32 |
|
|
/*
|
| 33 |
|
|
* This file implements the HAL Enhanced interrupt API for Nios II processors
|
| 34 |
|
|
* with an internal interrupt controller (IIC). For most routines, this serves
|
| 35 |
|
|
* as a wrapper layer over the legacy interrupt API (which must be used with
|
| 36 |
|
|
* the IIC only).
|
| 37 |
|
|
*
|
| 38 |
|
|
* Use of the enhanced API is recommended so that application and device
|
| 39 |
|
|
* drivers are compatible with a Nios II system configured with an external
|
| 40 |
|
|
* interrupt controller (EIC), or IIC. This will afford maximum portability.
|
| 41 |
|
|
*
|
| 42 |
|
|
* If an EIC is present, the EIC device driver must provide these routines,
|
| 43 |
|
|
* because their operation will be specific to that EIC type.
|
| 44 |
|
|
*/
|
| 45 |
|
|
#ifndef NIOS2_EIC_PRESENT
|
| 46 |
|
|
#ifdef ALT_ENHANCED_INTERRUPT_API_PRESENT
|
| 47 |
|
|
|
| 48 |
|
|
#include "sys/alt_irq.h"
|
| 49 |
|
|
#include "priv/alt_iic_isr_register.h"
|
| 50 |
|
|
#include "priv/alt_legacy_irq.h"
|
| 51 |
|
|
|
| 52 |
|
|
/** @Function Description: This function registers an interrupt handler.
|
| 53 |
|
|
* If the function is succesful, then the requested interrupt will be enabled upon
|
| 54 |
|
|
* return. Registering a NULL handler will disable the interrupt.
|
| 55 |
|
|
* @API Type: External
|
| 56 |
|
|
* @param ic_id Ignored.
|
| 57 |
|
|
* @param irq IRQ number
|
| 58 |
|
|
* @return 0 if successful, else error (-1)
|
| 59 |
|
|
*/
|
| 60 |
|
|
int alt_ic_isr_register(alt_u32 ic_id, alt_u32 irq, alt_isr_func isr,
|
| 61 |
|
|
void *isr_context, void *flags)
|
| 62 |
|
|
{
|
| 63 |
|
|
return alt_iic_isr_register(ic_id, irq, isr, isr_context, flags);
|
| 64 |
|
|
}
|
| 65 |
|
|
|
| 66 |
|
|
/** @Function Description: This function enables a single interrupt.
|
| 67 |
|
|
* @API Type: External
|
| 68 |
|
|
* @param ic_id Ignored.
|
| 69 |
|
|
* @param irq IRQ number
|
| 70 |
|
|
* @return 0 if successful, else error (-1)
|
| 71 |
|
|
*/
|
| 72 |
|
|
int alt_ic_irq_enable (alt_u32 ic_id, alt_u32 irq)
|
| 73 |
|
|
{
|
| 74 |
|
|
return alt_irq_enable(irq);
|
| 75 |
|
|
}
|
| 76 |
|
|
|
| 77 |
|
|
/** @Function Description: This function disables a single interrupt.
|
| 78 |
|
|
* @API Type: External
|
| 79 |
|
|
* @param ic_id Ignored.
|
| 80 |
|
|
* @param irq IRQ number
|
| 81 |
|
|
* @return 0 if successful, else error (-1)
|
| 82 |
|
|
*/
|
| 83 |
|
|
int alt_ic_irq_disable(alt_u32 ic_id, alt_u32 irq)
|
| 84 |
|
|
{
|
| 85 |
|
|
return alt_irq_disable(irq);
|
| 86 |
|
|
}
|
| 87 |
|
|
|
| 88 |
|
|
/** @Function Description: This function to determine if corresponding
|
| 89 |
|
|
* interrupt is enabled.
|
| 90 |
|
|
* @API Type: External
|
| 91 |
|
|
* @param ic_id Ignored.
|
| 92 |
|
|
* @param irq IRQ number
|
| 93 |
|
|
* @return Zero if corresponding interrupt is disabled and
|
| 94 |
|
|
* non-zero otherwise.
|
| 95 |
|
|
*/
|
| 96 |
|
|
alt_u32 alt_ic_irq_enabled(alt_u32 ic_id, alt_u32 irq)
|
| 97 |
|
|
{
|
| 98 |
|
|
alt_u32 irq_enabled;
|
| 99 |
|
|
|
| 100 |
|
|
NIOS2_READ_IENABLE(irq_enabled);
|
| 101 |
|
|
|
| 102 |
|
|
return (irq_enabled & (1 << irq)) ? 1: 0;
|
| 103 |
|
|
}
|
| 104 |
|
|
|
| 105 |
|
|
#endif /* ALT_ENHANCED_INTERRUPT_API_PRESENT */
|
| 106 |
|
|
#endif /* NIOS2_EIC_PRESENT */
|
