Viewing file:  irq.h (3.48 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
#ifndef _M68K_IRQ_H_
#define _M68K_IRQ_H_
#include <linux/linkage.h>
#include <linux/hardirq.h>
#include <linux/spinlock_types.h>
/*
* 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_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
#define NR_IRQS 200
#elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
#define NR_IRQS 72
#elif defined(CONFIG_Q40)
#define NR_IRQS 43
#elif defined(CONFIG_AMIGA)
#define NR_IRQS 32
#elif defined(CONFIG_APOLLO)
#define NR_IRQS 24
#elif defined(CONFIG_HP300)
#define NR_IRQS 8
#else
#error unknown nr of irqs
#endif
/*
* The hardirq mask has to be large enough to have
* space for potentially all IRQ sources in the system
* nesting on a single CPU:
*/
#if (1 << HARDIRQ_BITS) < NR_IRQS
# error HARDIRQ_BITS is too low!
#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 IRQ_SPURIOUS 0
#define IRQ_AUTO_1 1 /* level 1 interrupt */
#define IRQ_AUTO_2 2 /* level 2 interrupt */
#define IRQ_AUTO_3 3 /* level 3 interrupt */
#define IRQ_AUTO_4 4 /* level 4 interrupt */
#define IRQ_AUTO_5 5 /* level 5 interrupt */
#define IRQ_AUTO_6 6 /* level 6 interrupt */
#define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */
#define IRQ_USER 8
extern unsigned int irq_canonicalize(unsigned int irq);
struct pt_regs;
/*
* various flags for request_irq() - the Amiga now uses the standard
* mechanism like all other architectures - IRQF_DISABLED and
* IRQF_SHARED 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 {
int (*handler)(int, void *);
void *dev_id;
struct irq_node *next;
unsigned long flags;
const char *devname;
} irq_node_t;
/*
* This structure has only 4 elements for speed reasons
*/
struct irq_handler {
int (*handler)(int, void *);
unsigned long flags;
void *dev_id;
const char *devname;
};
struct irq_controller {
const char *name;
spinlock_t lock;
int (*startup)(unsigned int irq);
void (*shutdown)(unsigned int irq);
void (*enable)(unsigned int irq);
void (*disable)(unsigned int irq);
};
extern int m68k_irq_startup(unsigned int);
extern void m68k_irq_shutdown(unsigned int);
/*
* This function returns a new irq_node_t
*/
extern irq_node_t *new_irq_node(void);
extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *));
extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
void (*handler)(unsigned int, struct pt_regs *));
extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int);
asmlinkage void m68k_handle_int(unsigned int);
asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *);
#endif /* _M68K_IRQ_H_ */
|