patch-2.3.14 linux/arch/i386/kernel/irq.h

• Lines: 254
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.13/linux/arch/i386/kernel/irq.h
• Orig date: Wed Jul 28 14:47:42 1999

diff -u --recursive --new-file v2.3.13/linux/arch/i386/kernel/irq.h linux/arch/i386/kernel/irq.h
@@ -1,253 +0,0 @@
-#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 (*startup)(unsigned int irq);
-	void (*shutdown)(unsigned int irq);
-	void (*handle)(unsigned int irq, struct pt_regs * regs);
-	void (*enable)(unsigned int irq);
-	void (*disable)(unsigned int irq);
-};
-
-extern struct hw_interrupt_type no_irq_type;
-
-/*
- * 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 */
-
-/*
- * 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 */
-	struct hw_interrupt_type *handler;	/* handle/enable/disable functions */
-	struct irqaction *action;		/* IRQ action list */
-	unsigned int depth;			/* Disable depth for nested irq disables */
-} irq_desc_t;
-
-/*
- * IDT vectors usable for external interrupt sources start
- * at 0x20:
- */
-#define FIRST_EXTERNAL_VECTOR	0x20
-
-#define SYSCALL_VECTOR		0x80
-
-/*
- * Vectors 0x20-0x2f are used for ISA interrupts.
- */
-
-/*
- * Special IRQ vectors used by the SMP architecture:
- *
- * (some of the following vectors are 'rare', they are merged
- *  into a single vector (FUNCTION_VECTOR) to save vector space.
- *  TLB, reschedule and local APIC vectors are performance-critical.)
- */
-#define RESCHEDULE_VECTOR	0x30
-#define INVALIDATE_TLB_VECTOR	0x31
-#define STOP_CPU_VECTOR		0x40
-#define LOCAL_TIMER_VECTOR	0x41
-#define CALL_FUNCTION_VECTOR	0x50
-
-/*
- * First APIC vector available to drivers: (vectors 0x51-0xfe)
- */
-#define IRQ0_TRAP_VECTOR	0x51
-
-/*
- * This IRQ should never happen, but we print a message nevertheless.
- */
-#define SPURIOUS_APIC_VECTOR	0xff
-
-extern irq_desc_t irq_desc[NR_IRQS];
-extern int irq_vector[NR_IRQS];
-#define IO_APIC_VECTOR(irq)	irq_vector[irq]
-
-extern void init_IRQ_SMP(void);
-extern int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
-extern int setup_x86_irq(unsigned int, struct irqaction *);
-
-/*
- * Various low-level irq details needed by irq.c, process.c,
- * time.c, io_apic.c and smp.c
- *
- * Interrupt entry/exit code at both C and assembly level
- */
-
-extern void no_action(int cpl, void *dev_id, struct pt_regs *regs);
-extern void mask_irq(unsigned int irq);
-extern void unmask_irq(unsigned int irq);
-extern void disable_8259A_irq(unsigned int irq);
-extern int i8259A_irq_pending(unsigned int irq);
-extern void ack_APIC_irq(void);
-extern void FASTCALL(send_IPI_self(int vector));
-extern void init_VISWS_APIC_irqs(void);
-extern void setup_IO_APIC(void);
-extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
-extern void make_8259A_irq(unsigned int irq);
-extern void send_IPI(int dest, int vector);
-extern void init_pic_mode(void);
-extern void print_IO_APIC(void);
-
-extern unsigned long io_apic_irqs;
-
-extern char _stext, _etext;
-
-#define MAX_IRQ_SOURCES 128
-#define MAX_MP_BUSSES 32
-enum mp_bustype {
-	MP_BUS_ISA,
-	MP_BUS_EISA,
-	MP_BUS_PCI
-};
-extern int mp_bus_id_to_type [MAX_MP_BUSSES];
-extern int mp_bus_id_to_pci_bus [MAX_MP_BUSSES];
-
-extern spinlock_t irq_controller_lock;
-
-#ifdef __SMP__
-
-#include <asm/atomic.h>
-
-static inline void irq_enter(int cpu, unsigned int irq)
-{
-	hardirq_enter(cpu);
-	while (test_bit(0,&global_irq_lock)) {
-		/* nothing */;
-	}
-}
-
-static inline void irq_exit(int cpu, unsigned int irq)
-{
-	hardirq_exit(cpu);
-}
-
-#define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
-
-#else
-
-#define irq_enter(cpu, irq)	(++local_irq_count[cpu])
-#define irq_exit(cpu, irq)	(--local_irq_count[cpu])
-
-#define IO_APIC_IRQ(x)	(0)
-
-#endif
-
-#define __STR(x) #x
-#define STR(x) __STR(x)
-
-#define SAVE_ALL \
-	"cld\n\t" \
-	"pushl %es\n\t" \
-	"pushl %ds\n\t" \
-	"pushl %eax\n\t" \
-	"pushl %ebp\n\t" \
-	"pushl %edi\n\t" \
-	"pushl %esi\n\t" \
-	"pushl %edx\n\t" \
-	"pushl %ecx\n\t" \
-	"pushl %ebx\n\t" \
-	"movl $" STR(__KERNEL_DS) ",%edx\n\t" \
-	"movl %dx,%ds\n\t" \
-	"movl %dx,%es\n\t"
-
-#define IRQ_NAME2(nr) nr##_interrupt(void)
-#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
-
-#define GET_CURRENT \
-	"movl %esp, %ebx\n\t" \
-	"andl $-8192, %ebx\n\t"
-
-#ifdef __SMP__
-
-/*
- *	SMP has a few special interrupts for IPI messages
- */
-
-#define BUILD_SMP_INTERRUPT(x) \
-asmlinkage void x(void); \
-__asm__( \
-"\n"__ALIGN_STR"\n" \
-SYMBOL_NAME_STR(x) ":\n\t" \
-	"pushl $-1\n\t" \
-	SAVE_ALL \
-	"call "SYMBOL_NAME_STR(smp_##x)"\n\t" \
-	"jmp ret_from_intr\n");
-
-#define BUILD_SMP_TIMER_INTERRUPT(x) \
-asmlinkage void x(struct pt_regs * regs); \
-__asm__( \
-"\n"__ALIGN_STR"\n" \
-SYMBOL_NAME_STR(x) ":\n\t" \
-	"pushl $-1\n\t" \
-	SAVE_ALL \
-	"movl %esp,%eax\n\t" \
-	"pushl %eax\n\t" \
-	"call "SYMBOL_NAME_STR(smp_##x)"\n\t" \
-	"addl $4,%esp\n\t" \
-	"jmp ret_from_intr\n");
-
-#endif /* __SMP__ */
-
-#define BUILD_COMMON_IRQ() \
-__asm__( \
-	"\n" __ALIGN_STR"\n" \
-	"common_interrupt:\n\t" \
-	SAVE_ALL \
-	"pushl $ret_from_intr\n\t" \
-	"jmp "SYMBOL_NAME_STR(do_IRQ));
-
-/*
- * subtle. orig_eax is used by the signal code to distinct between
- * system calls and interrupted 'random user-space'. Thus we have
- * to put a negative value into orig_eax here. (the problem is that
- * both system calls and IRQs want to have small integer numbers in
- * orig_eax, and the syscall code has won the optimization conflict ;)
- */
-#define BUILD_IRQ(nr) \
-asmlinkage void IRQ_NAME(nr); \
-__asm__( \
-"\n"__ALIGN_STR"\n" \
-SYMBOL_NAME_STR(IRQ) #nr "_interrupt:\n\t" \
-	"pushl $"#nr"-256\n\t" \
-	"jmp common_interrupt");
-
-/*
- * x86 profiling function, SMP safe. We might want to do this in
- * assembly totally?
- */
-static inline void x86_do_profile (unsigned long eip)
-{
-	if (prof_buffer) {
-		eip -= (unsigned long) &_stext;
-		eip >>= prof_shift;
-		/*
-		 * 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.
-		 */
-		if (eip > prof_len-1)
-			eip = prof_len-1;
-		atomic_inc((atomic_t *)&prof_buffer[eip]);
-	}
-}
-
-#endif