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464abc5de6
- Simplify init_arch_irq - Make code more readable - Remove useless SSYNCs - Fix comments Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*
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* Changed by HuTao Apr18, 2003
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*
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* Copyright was missing when I got the code so took from MIPS arch ...MaTed---
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* Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
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* Copyright (C) 1995, 96, 97, 98, 99, 2000, 2001 by Ralf Baechle
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*
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* Adapted for BlackFin (ADI) by Ted Ma <mated@sympatico.ca>
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* Copyright (c) 2002 Arcturus Networks Inc. (www.arcturusnetworks.com)
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* Copyright (c) 2002 Lineo, Inc. <mattw@lineo.com>
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*/
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#ifndef _BFIN_IRQ_H_
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#define _BFIN_IRQ_H_
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#include <asm/mach/irq.h>
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#include <asm/ptrace.h>
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/*******************************************************************************
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***** INTRODUCTION ***********
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* On the Blackfin, the interrupt structure allows remmapping of the hardware
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* levels.
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* - I'm going to assume that the H/W level is going to stay at the default
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* settings. If someone wants to go through and abstart this out, feel free
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* to mod the interrupt numbering scheme.
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* - I'm abstracting the interrupts so that uClinux does not know anything
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* about the H/W levels. If you want to change the H/W AND keep the abstracted
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* levels that uClinux sees, you should be able to do most of it here.
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* - I've left the "abstract" numbering sparce in case someone wants to pull the
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* interrupts apart (just the TX/RX for the various devices)
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*******************************************************************************/
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/* SYS_IRQS and NR_IRQS are defined in <asm/mach-bf5xx/irq.h>*/
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/*
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* Machine specific interrupt sources.
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*
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* Adding an interrupt service routine for a source with this bit
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* set indicates a special machine specific interrupt source.
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* The machine specific files define these sources.
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*
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* The IRQ_MACHSPEC bit is now gone - the only thing it did was to
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* introduce unnecessary overhead.
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*
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* All interrupt handling is actually machine specific so it is better
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* to use function pointers, as used by the Sparc port, and select the
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* interrupt handling functions when initializing the kernel. This way
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* we save some unnecessary overhead at run-time.
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* 01/11/97 - Jes
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*/
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extern void ack_bad_irq(unsigned int irq);
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static __inline__ int irq_canonicalize(int irq)
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{
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return irq;
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}
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/* count of spurious interrupts */
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/* extern volatile unsigned int num_spurious; */
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#ifndef NO_IRQ
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#define NO_IRQ ((unsigned int)(-1))
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#endif
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#define SIC_SYSIRQ(irq) (irq - (IRQ_CORETMR + 1))
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#endif /* _BFIN_IRQ_H_ */
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