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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-m68k/irq.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-m68k/irq.h')
-rw-r--r-- | include/asm-m68k/irq.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/include/asm-m68k/irq.h b/include/asm-m68k/irq.h new file mode 100644 index 000000000000..1f569905cb74 --- /dev/null +++ b/include/asm-m68k/irq.h @@ -0,0 +1,131 @@ +#ifndef _M68K_IRQ_H_ +#define _M68K_IRQ_H_ + +#include <linux/config.h> +#include <linux/interrupt.h> + +/* + * # of m68k interrupts + */ + +#define SYS_IRQS 8 + +/* + * This should be the same as the max(NUM_X_SOURCES) for all the + * different m68k hosts compiled into the kernel. + * Currently the Atari has 72 and the Amiga 24, but if both are + * supported in the kernel it is better to make room for 72. + */ +#if defined(CONFIG_ATARI) || defined(CONFIG_MAC) +#define NR_IRQS (72+SYS_IRQS) +#else +#define NR_IRQS (24+SYS_IRQS) +#endif + +/* + * Interrupt source definitions + * General interrupt sources are the level 1-7. + * Adding an interrupt service routine for one of these sources + * results in the addition of that routine to a chain of routines. + * Each one is called in succession. Each individual interrupt + * service routine should determine if the device associated with + * that routine requires service. + */ + +#define IRQ1 (1) /* level 1 interrupt */ +#define IRQ2 (2) /* level 2 interrupt */ +#define IRQ3 (3) /* level 3 interrupt */ +#define IRQ4 (4) /* level 4 interrupt */ +#define IRQ5 (5) /* level 5 interrupt */ +#define IRQ6 (6) /* level 6 interrupt */ +#define IRQ7 (7) /* level 7 interrupt (non-maskable) */ + +/* + * "Generic" interrupt sources + */ + +#define IRQ_SCHED_TIMER (8) /* interrupt source for scheduling timer */ + +static __inline__ int irq_canonicalize(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 (*enable_irq)(unsigned int); +extern void (*disable_irq)(unsigned int); + +#define disable_irq_nosync disable_irq +#define enable_irq_nosync enable_irq + +struct pt_regs; + +extern int cpu_request_irq(unsigned int, + irqreturn_t (*)(int, void *, struct pt_regs *), + unsigned long, const char *, void *); +extern void cpu_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. + */ +#ifndef MACH_AMIGA_ONLY +#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 */ +#endif + +/* + * This structure is used to chain together the ISRs for a particular + * interrupt source (if it supports chaining). + */ +typedef struct irq_node { + irqreturn_t (*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 { + irqreturn_t (*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); + +struct irqaction; +struct pt_regs; +int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *); + +#endif /* _M68K_IRQ_H_ */ |