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Diffstat (limited to 'arch/blackfin/include/asm/irq.h')
-rw-r--r-- | arch/blackfin/include/asm/irq.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/irq.h b/arch/blackfin/include/asm/irq.h new file mode 100644 index 00000000000..89f59e18af9 --- /dev/null +++ b/arch/blackfin/include/asm/irq.h @@ -0,0 +1,72 @@ +/* + * 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 <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 <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 + +#define SIC_SYSIRQ(irq) (irq - (IRQ_CORETMR + 1)) + +#endif /* _BFIN_IRQ_H_ */ |