68387c448b
Convert the generic irq code to use irq controller, this gets rid of the machine specific callbacks and gives better control over irq handling without duplicating lots of code. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
128 lines
3.6 KiB
C
128 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 - SA_INTERRUPT and SA_SHIRQ
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* 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 *, struct pt_regs *);
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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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typedef struct irq_handler {
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int (*handler)(int, void *, struct pt_regs *);
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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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} irq_handler_t;
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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, struct pt_regs *);
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#endif /* _M68K_IRQ_H_ */
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