diff options
Diffstat (limited to 'arch/i386/kernel/irq.h')
| -rw-r--r-- | arch/i386/kernel/irq.h | 64 |
1 files changed, 52 insertions, 12 deletions
diff --git a/arch/i386/kernel/irq.h b/arch/i386/kernel/irq.h index a769369c2..fedfdbc97 100644 --- a/arch/i386/kernel/irq.h +++ b/arch/i386/kernel/irq.h @@ -1,6 +1,52 @@ #ifndef __irq_h #define __irq_h +#include <asm/irq.h> + +/* + * Interrupt controller descriptor. This is all we need + * to describe about the low-level hardware. + */ +struct hw_interrupt_type { + const char * typename; + void (*handle)(unsigned int irq, int cpu, struct pt_regs * regs); + void (*enable)(unsigned int irq); + void (*disable)(unsigned int irq); +}; + + +/* + * Status: reason for being disabled: somebody has + * done a "disable_irq()" or we must not re-enter the + * already executing irq.. + */ +#define IRQ_INPROGRESS 1 +#define IRQ_DISABLED 2 + +/* + * 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 - IRQ_INPROGRESS, IRQ_DISABLED */ + unsigned int events; /* Do we have any pending events? */ + unsigned int ipi; /* Have we sent off the pending IPI? */ + struct hw_interrupt_type *handler; /* handle/enable/disable functions */ + struct irqaction *action; /* IRQ action list */ + unsigned int unused[3]; +} irq_desc_t; + +#define IRQ0_TRAP_VECTOR 0x51 + +extern irq_desc_t irq_desc[NR_IRQS]; +extern int irq_vector[NR_IRQS]; + +extern void init_IRQ_SMP(void); +extern int handle_IRQ_event(unsigned int, struct pt_regs *); + /* * Various low-level irq details needed by irq.c, process.c, * time.c, io_apic.c and smp.c @@ -10,21 +56,19 @@ void mask_irq(unsigned int irq); void unmask_irq(unsigned int irq); -void enable_IO_APIC_irq (unsigned int irq); -void disable_IO_APIC_irq (unsigned int irq); -void set_8259A_irq_mask(unsigned int irq); +void disable_8259A_irq(unsigned int irq); +int i8259A_irq_pending (unsigned int irq); void ack_APIC_irq (void); void setup_IO_APIC (void); -void init_IO_APIC_traps(void); int IO_APIC_get_PCI_irq_vector (int bus, int slot, int fn); -int IO_APIC_irq_trigger (int irq); void make_8259A_irq (unsigned int irq); void send_IPI (int dest, int vector); void init_pic_mode (void); +void print_IO_APIC (void); -extern unsigned int io_apic_irqs; +extern unsigned long long io_apic_irqs; -#define IO_APIC_VECTOR(irq) (0x51+((irq)<<3)) +#define IO_APIC_VECTOR(irq) irq_vector[irq] #define MAX_IRQ_SOURCES 128 #define MAX_MP_BUSSES 32 @@ -68,10 +112,6 @@ static inline void irq_exit(int cpu, unsigned int irq) #define irq_enter(cpu, irq) (++local_irq_count[cpu]) #define irq_exit(cpu, irq) (--local_irq_count[cpu]) -/* Make these no-ops when not using SMP */ -#define enable_IO_APIC_irq(x) do { } while (0) -#define disable_IO_APIC_irq(x) do { } while (0) - #define IO_APIC_IRQ(x) (0) #endif @@ -159,7 +199,7 @@ static inline void x86_do_profile (unsigned long eip) eip -= (unsigned long) &_stext; eip >>= prof_shift; /* - * Dont ignore out-of-bounds EIP values silently, + * Don't ignore out-of-bounds EIP values silently, * put them into the last histogram slot, so if * present, they will show up as a sharp peak. */ |