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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*
* Changed by HuTao Apr18, 2003
*
* Copyright was missing when I got the code so took from MIPS arch ...MaTed---
* Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
* Copyright (C) 1995, 96, 97, 98, 99, 2000, 2001 by Ralf Baechle
*
* Adapted for BlackFin (ADI) by Ted Ma <mated@sympatico.ca>
* Copyright (c) 2002 Arcturus Networks Inc. (www.arcturusnetworks.com)
* Copyright (c) 2002 Lineo, Inc. <mattw@lineo.com>
*/
#ifndef _BFIN_IRQ_H_
#define _BFIN_IRQ_H_
#include <asm/mach/irq.h>
#include <asm/ptrace.h>
/*******************************************************************************
***** INTRODUCTION ***********
* On the Blackfin, the interrupt structure allows remmapping of the hardware
* levels.
* - I'm going to assume that the H/W level is going to stay at the default
* settings. If someone wants to go through and abstart this out, feel free
* to mod the interrupt numbering scheme.
* - I'm abstracting the interrupts so that uClinux does not know anything
* about the H/W levels. If you want to change the H/W AND keep the abstracted
* levels that uClinux sees, you should be able to do most of it here.
* - I've left the "abstract" numbering sparce in case someone wants to pull the
* interrupts apart (just the TX/RX for the various devices)
*******************************************************************************/
/* SYS_IRQS and NR_IRQS are defined in <asm/mach-bf5xx/irq.h>*/
/*
* Machine specific interrupt sources.
*
* Adding an interrupt service routine for a source with this bit
* set indicates a special machine specific interrupt source.
* The machine specific files define these sources.
*
* The IRQ_MACHSPEC bit is now gone - the only thing it did was to
* introduce unnecessary overhead.
*
* All interrupt handling is actually machine specific so it is better
* to use function pointers, as used by the Sparc port, and select the
* interrupt handling functions when initializing the kernel. This way
* we save some unnecessary overhead at run-time.
* 01/11/97 - Jes
*/
extern void ack_bad_irq(unsigned int irq);
static __inline__ int irq_canonicalize(int irq)
{
return irq;
}
/* count of spurious interrupts */
/* extern volatile unsigned int num_spurious; */
#ifndef NO_IRQ
#define NO_IRQ ((unsigned int)(-1))
#endif
#endif /* _BFIN_IRQ_H_ */
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