129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
#ifndef _M68K_IRQ_H_
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#define _M68K_IRQ_H_
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#include <linux/linkage.h>
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#include <linux/hardirq.h>
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#include <linux/spinlock_types.h>
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/*
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* This should be the same as the max(NUM_X_SOURCES) for all the
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* different m68k hosts compiled into the kernel.
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* Currently the Atari has 72 and the Amiga 24, but if both are
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* supported in the kernel it is better to make room for 72.
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*/
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#if defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
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#define NR_IRQS 200
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#elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
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#define NR_IRQS 72
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#elif defined(CONFIG_Q40)
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#define NR_IRQS 43
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#elif defined(CONFIG_AMIGA)
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#define NR_IRQS 32
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#elif defined(CONFIG_APOLLO)
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#define NR_IRQS 24
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#elif defined(CONFIG_HP300)
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#define NR_IRQS 8
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#else
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#error unknown nr of irqs
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#endif
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/*
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* The hardirq mask has to be large enough to have
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* space for potentially all IRQ sources in the system
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* nesting on a single CPU:
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*/
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#if (1 << HARDIRQ_BITS) < NR_IRQS
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# error HARDIRQ_BITS is too low!
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#endif
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/*
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* Interrupt source definitions
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* General interrupt sources are the level 1-7.
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* Adding an interrupt service routine for one of these sources
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* results in the addition of that routine to a chain of routines.
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* Each one is called in succession. Each individual interrupt
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* service routine should determine if the device associated with
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* that routine requires service.
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*/
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#define IRQ_SPURIOUS 0
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#define IRQ_AUTO_1 1 /* level 1 interrupt */
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#define IRQ_AUTO_2 2 /* level 2 interrupt */
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#define IRQ_AUTO_3 3 /* level 3 interrupt */
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#define IRQ_AUTO_4 4 /* level 4 interrupt */
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#define IRQ_AUTO_5 5 /* level 5 interrupt */
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#define IRQ_AUTO_6 6 /* level 6 interrupt */
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#define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */
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#define IRQ_USER 8
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extern unsigned int irq_canonicalize(unsigned int irq);
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extern void enable_irq(unsigned int);
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extern void disable_irq(unsigned int);
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#define disable_irq_nosync disable_irq
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struct pt_regs;
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/*
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* various flags for request_irq() - the Amiga now uses the standard
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* mechanism like all other architectures - IRQF_DISABLED and
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* IRQF_SHARED are your friends.
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*/
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#ifndef MACH_AMIGA_ONLY
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#define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */
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#define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */
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#define IRQ_FLG_FAST (0x0004)
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#define IRQ_FLG_SLOW (0x0008)
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#define IRQ_FLG_STD (0x8000) /* internally used */
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#endif
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/*
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* This structure is used to chain together the ISRs for a particular
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* interrupt source (if it supports chaining).
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*/
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typedef struct irq_node {
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int (*handler)(int, void *);
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void *dev_id;
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struct irq_node *next;
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unsigned long flags;
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const char *devname;
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} irq_node_t;
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/*
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* This structure has only 4 elements for speed reasons
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*/
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struct irq_handler {
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int (*handler)(int, void *);
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unsigned long flags;
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void *dev_id;
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const char *devname;
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};
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struct irq_controller {
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const char *name;
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spinlock_t lock;
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int (*startup)(unsigned int irq);
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void (*shutdown)(unsigned int irq);
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void (*enable)(unsigned int irq);
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void (*disable)(unsigned int irq);
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};
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extern int m68k_irq_startup(unsigned int);
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extern void m68k_irq_shutdown(unsigned int);
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/*
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* This function returns a new irq_node_t
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*/
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extern irq_node_t *new_irq_node(void);
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extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *));
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extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
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void (*handler)(unsigned int, struct pt_regs *));
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extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int);
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asmlinkage void m68k_handle_int(unsigned int);
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asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *);
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#endif /* _M68K_IRQ_H_ */
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