| #ifndef __irq_h |
| #define __irq_h |
| |
| /* |
| * Please do not include this file in generic code. There is currently |
| * no requirement for any architecture to implement anything held |
| * within this file. |
| * |
| * Thanks. --rmk |
| */ |
| |
| #include <linux/config.h> |
| |
| #if !defined(CONFIG_ARCH_S390) |
| |
| #include <linux/cache.h> |
| #include <linux/spinlock.h> |
| |
| #include <asm/irq.h> |
| #include <asm/ptrace.h> |
| |
| /* |
| * IRQ line status. |
| */ |
| #define IRQ_INPROGRESS 1 /* IRQ handler active - do not enter! */ |
| #define IRQ_DISABLED 2 /* IRQ disabled - do not enter! */ |
| #define IRQ_PENDING 4 /* IRQ pending - replay on enable */ |
| #define IRQ_REPLAY 8 /* IRQ has been replayed but not acked yet */ |
| #define IRQ_AUTODETECT 16 /* IRQ is being autodetected */ |
| #define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */ |
| #define IRQ_LEVEL 64 /* IRQ level triggered */ |
| #define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */ |
| #define IRQ_PER_CPU 256 /* IRQ is per CPU */ |
| |
| /* |
| * Interrupt controller descriptor. This is all we need |
| * to describe about the low-level hardware. |
| */ |
| struct hw_interrupt_type { |
| const char * typename; |
| unsigned int (*startup)(unsigned int irq); |
| void (*shutdown)(unsigned int irq); |
| void (*enable)(unsigned int irq); |
| void (*disable)(unsigned int irq); |
| void (*ack)(unsigned int irq); |
| void (*end)(unsigned int irq); |
| void (*set_affinity)(unsigned int irq, unsigned long mask); |
| }; |
| |
| typedef struct hw_interrupt_type hw_irq_controller; |
| |
| /* |
| * This is the "IRQ descriptor", which contains various information |
| * about the irq, including what kind of hardware handling it has, |
| * whether it is disabled etc etc. |
| * |
| * Pad this out to 32 bytes for cache and indexing reasons. |
| */ |
| typedef struct { |
| unsigned int status; /* IRQ status */ |
| hw_irq_controller *handler; |
| struct irqaction *action; /* IRQ action list */ |
| unsigned int depth; /* nested irq disables */ |
| spinlock_t lock; |
| } ____cacheline_aligned irq_desc_t; |
| |
| extern irq_desc_t irq_desc [NR_IRQS]; |
| |
| #include <asm/hw_irq.h> /* the arch dependent stuff */ |
| |
| extern int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *); |
| extern int setup_irq(unsigned int , struct irqaction * ); |
| |
| extern hw_irq_controller no_irq_type; /* needed in every arch ? */ |
| extern void no_action(int cpl, void *dev_id, struct pt_regs *regs); |
| |
| #endif |
| |
| #endif /* __asm_h */ |