/* * U-boot - irq.h Interrupt related header file * * Copyright (c) 2005-2007 Analog Devices Inc. * * This file was based on * linux/arch/$(ARCH)/platform/$(PLATFORM)/irq.c * * 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> * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, * MA 02110-1301 USA */ #ifndef _BLACKFIN_IRQ_H_ #define _BLACKFIN_IRQ_H_ #include <linux/config.h> #include <asm/hw_irq.h> /* * 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) */ #define NR_IRQS SYS_IRQS /* * "Generic" interrupt sources */ #define IRQ_SCHED_TIMER (8) /* interrupt source for scheduling timer */ static __inline__ int irq_cannonicalize(int irq) { return irq; } /* * 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 (*mach_enable_irq) (unsigned int); extern void (*mach_disable_irq) (unsigned int); extern int sys_request_irq(unsigned int, void (*)(int, void *, struct pt_regs *), unsigned long, const char *, void *); extern void sys_free_irq(unsigned int, void *); /* * various flags for request_irq() - the Amiga now uses the standard * mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ * are your friends. */ #define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */ #define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */ #define IRQ_FLG_FAST (0x0004) #define IRQ_FLG_SLOW (0x0008) #define IRQ_FLG_STD (0x8000) /* internally used */ /* * This structure is used to chain together the ISRs for a particular * interrupt source (if it supports chaining). */ typedef struct irq_node { void (*handler) (int, void *, struct pt_regs *); unsigned long flags; void *dev_id; const char *devname; struct irq_node *next; } irq_node_t; /* * This structure has only 4 elements for speed reasons */ typedef struct irq_handler { void (*handler) (int, void *, struct pt_regs *); unsigned long flags; void *dev_id; const char *devname; } irq_handler_t; /* count of spurious interrupts */ extern volatile unsigned int num_spurious; /* * This function returns a new irq_node_t */ extern irq_node_t *new_irq_node(void); /* * Some drivers want these entry points */ #define enable_irq(x) (mach_enable_irq ? (*mach_enable_irq)(x) : 0) #define disable_irq(x) (mach_disable_irq ? (*mach_disable_irq)(x) : 0) #define enable_irq_nosync(x) enable_irq(x) #define disable_irq_nosync(x) disable_irq(x) #endif