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 56extern void ack_bad_irq(unsigned int irq); 57 58static __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_ */ 71