129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
|
#ifndef _M68K_IRQ_H_
|
||
|
|
#define _M68K_IRQ_H_
|
||
|
|
|
||
|
|
#include <linux/config.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_COLDFIRE
|
||
|
|
/*
|
||
|
|
* On the ColdFire we keep track of all vectors. That way drivers
|
||
|
|
* can register whatever vector number they wish, and we can deal
|
||
|
|
* with it.
|
||
|
|
*/
|
||
|
|
#define SYS_IRQS 256
|
||
|
|
#define NR_IRQS SYS_IRQS
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
/*
|
||
|
|
* # of m68k interrupts
|
||
|
|
*/
|
||
|
|
#define SYS_IRQS 8
|
||
|
|
#define NR_IRQS (24+SYS_IRQS)
|
||
|
|
|
||
|
|
#endif /* CONFIG_COLDFIRE */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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) */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 */
|
||
|
|
|
||
|
|
#ifdef CONFIG_M68360
|
||
|
|
|
||
|
|
#define CPM_INTERRUPT IRQ4
|
||
|
|
|
||
|
|
/* see MC68360 User's Manual, p. 7-377 */
|
||
|
|
#define CPM_VECTOR_BASE 0x04 /* 3 MSbits of CPM vector */
|
||
|
|
|
||
|
|
#endif /* CONFIG_M68360 */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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)
|
||
|
|
|
||
|
|
struct irqaction;
|
||
|
|
struct pt_regs;
|
||
|
|
int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
|
||
|
|
|
||
|
|
#endif /* _M68K_IRQ_H_ */
|