| Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file COPYING in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Changed by HuTao Apr18, 2003 |
| 7 | * |
| 8 | * Copyright was missing when I got the code so took from MIPS arch ...MaTed--- |
| 9 | * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle |
| 10 | * Copyright (C) 1995, 96, 97, 98, 99, 2000, 2001 by Ralf Baechle |
| 11 | * |
| 12 | * Adapted for BlackFin (ADI) by Ted Ma <mated@sympatico.ca> |
| 13 | * Copyright (c) 2002 Arcturus Networks Inc. (www.arcturusnetworks.com) |
| 14 | * Copyright (c) 2002 Lineo, Inc. <mattw@lineo.com> |
| 15 | */ |
| 16 | |
| 17 | #ifndef _BFIN_IRQ_H_ |
| 18 | #define _BFIN_IRQ_H_ |
| 19 | |
| 20 | #include <asm/mach/irq.h> |
| 21 | #include <asm/ptrace.h> |
| 22 | |
| 23 | /******************************************************************************* |
| 24 | ***** INTRODUCTION *********** |
| 25 | * On the Blackfin, the interrupt structure allows remmapping of the hardware |
| 26 | * levels. |
| 27 | * - I'm going to assume that the H/W level is going to stay at the default |
| 28 | * settings. If someone wants to go through and abstart this out, feel free |
| 29 | * to mod the interrupt numbering scheme. |
| 30 | * - I'm abstracting the interrupts so that uClinux does not know anything |
| 31 | * about the H/W levels. If you want to change the H/W AND keep the abstracted |
| 32 | * levels that uClinux sees, you should be able to do most of it here. |
| 33 | * - I've left the "abstract" numbering sparce in case someone wants to pull the |
| 34 | * interrupts apart (just the TX/RX for the various devices) |
| 35 | *******************************************************************************/ |
| 36 | |
| 37 | /* SYS_IRQS and NR_IRQS are defined in <asm/mach-bf5xx/irq.h>*/ |
| 38 | |
| 39 | /* |
| 40 | * Machine specific interrupt sources. |
| 41 | * |
| 42 | * Adding an interrupt service routine for a source with this bit |
| 43 | * set indicates a special machine specific interrupt source. |
| 44 | * The machine specific files define these sources. |
| 45 | * |
| 46 | * The IRQ_MACHSPEC bit is now gone - the only thing it did was to |
| 47 | * introduce unnecessary overhead. |
| 48 | * |
| 49 | * All interrupt handling is actually machine specific so it is better |
| 50 | * to use function pointers, as used by the Sparc port, and select the |
| 51 | * interrupt handling functions when initializing the kernel. This way |
| 52 | * we save some unnecessary overhead at run-time. |
| 53 | * 01/11/97 - Jes |
| 54 | */ |
| 55 | |
| 56 | extern void ack_bad_irq(unsigned int irq); |
| 57 | |
| 58 | static __inline__ int irq_canonicalize(int irq) |
| 59 | { |
| 60 | return irq; |
| 61 | } |
| 62 | |
| 63 | /* count of spurious interrupts */ |
| 64 | /* extern volatile unsigned int num_spurious; */ |
| 65 | |
| 66 | #ifndef NO_IRQ |
| 67 | #define NO_IRQ ((unsigned int)(-1)) |
| 68 | #endif |
| 69 | |
| 70 | #endif /* _BFIN_IRQ_H_ */ |