#ifndef _ASM_IRQ_H#define _ASM_IRQ_H/* *	linux/include/asm/irq.h * *	(C) 1992, 1993 Linus Torvalds */#include <linux/segment.h>#include <linux/linkage.h>extern void disable_irq(unsigned int);extern void enable_irq(unsigned int);#define __STR(x) #x#define STR(x) __STR(x) #define SAVE_ALL \	"cld\n\t" \	"push %gs\n\t" \	"push %fs\n\t" \	"push %es\n\t" \	"push %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" \	"mov %dx,%ds\n\t" \	"mov %dx,%es\n\t" \	"movl $" STR(USER_DS) ",%edx\n\t" \	"mov %dx,%fs\n\t"   \	"movl $0,%edx\n\t"  \	"movl %edx,%db7\n\t"/* * SAVE_MOST/RESTORE_MOST is used for the faster version of IRQ handlers, * installed by using the SA_INTERRUPT flag. These kinds of IRQ's don't * call the routines that do signal handling etc on return, and can have * more relaxed register-saving etc. They are also atomic, and are thus * suited for small, fast interrupts like the serial lines or the harddisk * drivers, which don't actually need signal handling etc. * * Also note that we actually save only those registers that are used in * C subroutines (%eax, %edx and %ecx), so if you do something weird, * you're on your own. The only segments that are saved (not counting the * automatic stack and code segment handling) are %ds and %es, and they * point to kernel space. No messing around with %fs here. */#define SAVE_MOST \	"cld\n\t" \	"push %es\n\t" \	"push %ds\n\t" \	"pushl %eax\n\t" \	"pushl %edx\n\t" \	"pushl %ecx\n\t" \	"movl $" STR(KERNEL_DS) ",%edx\n\t" \	"mov %dx,%ds\n\t" \	"mov %dx,%es\n\t"#define RESTORE_MOST \	"popl %ecx\n\t" \	"popl %edx\n\t" \	"popl %eax\n\t" \	"pop %ds\n\t" \	"pop %es\n\t" \	"iret"/* * The "inb" instructions are not needed, but seem to change the timings * a bit - without them it seems that the harddisk driver won't work on * all hardware. Arghh. */#define ACK_FIRST(mask) \	"inb $0x21,%al\n\t" \	"jmp 1f\n" \	"1:\tjmp 1f\n" \	"1:\torb $" #mask ",_cache_21\n\t" \	"movb _cache_21,%al\n\t" \	"outb %al,$0x21\n\t" \	"jmp 1f\n" \	"1:\tjmp 1f\n" \	"1:\tmovb $0x20,%al\n\t" \	"outb %al,$0x20\n\t"#define ACK_SECOND(mask) \	"inb $0xA1,%al\n\t" \	"jmp 1f\n" \	"1:\tjmp 1f\n" \	"1:\torb $" #mask ",_cache_A1\n\t" \	"movb _cache_A1,%al\n\t" \	"outb %al,$0xA1\n\t" \	"jmp 1f\n" \	"1:\tjmp 1f\n" \	"1:\tmovb $0x20,%al\n\t" \	"outb %al,$0xA0\n\t" \	"jmp 1f\n" \	"1:\tjmp 1f\n" \	"1:\toutb %al,$0x20\n\t"#define UNBLK_FIRST(mask) \	"inb $0x21,%al\n\t" \	"jmp 1f\n" \	"1:\tjmp 1f\n" \	"1:\tandb $~(" #mask "),_cache_21\n\t" \	"movb _cache_21,%al\n\t" \	"outb %al,$0x21\n\t"#define UNBLK_SECOND(mask) \	"inb $0xA1,%al\n\t" \	"jmp 1f\n" \	"1:\tjmp 1f\n" \	"1:\tandb $~(" #mask "),_cache_A1\n\t" \	"movb _cache_A1,%al\n\t" \	"outb %al,$0xA1\n\t"#define IRQ_NAME2(nr) nr##_interrupt(void)#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)#define FAST_IRQ_NAME(nr) IRQ_NAME2(fast_IRQ##nr)#define BAD_IRQ_NAME(nr) IRQ_NAME2(bad_IRQ##nr)	#define BUILD_IRQ(chip,nr,mask) \asmlinkage void IRQ_NAME(nr); \asmlinkage void FAST_IRQ_NAME(nr); \asmlinkage void BAD_IRQ_NAME(nr); \__asm__( \"\n.align 4\n" \"_IRQ" #nr "_interrupt:\n\t" \	"pushl $-"#nr"-2\n\t" \	SAVE_ALL \	ACK_##chip(mask) \	"incl _intr_count\n\t"\	"sti\n\t" \	"movl %esp,%ebx\n\t" \	"pushl %ebx\n\t" \	"pushl $" #nr "\n\t" \	"call _do_IRQ\n\t" \	"addl $8,%esp\n\t" \	"cli\n\t" \	UNBLK_##chip(mask) \	"decl _intr_count\n\t" \	"jmp ret_from_sys_call\n" \"\n.align 4\n" \"_fast_IRQ" #nr "_interrupt:\n\t" \	SAVE_MOST \	ACK_##chip(mask) \	"incl _intr_count\n\t" \	"pushl $" #nr "\n\t" \	"call _do_fast_IRQ\n\t" \	"addl $4,%esp\n\t" \	"cli\n\t" \	UNBLK_##chip(mask) \	"decl _intr_count\n\t" \	RESTORE_MOST \"\n\n.align 4\n" \"_bad_IRQ" #nr "_interrupt:\n\t" \	SAVE_MOST \	ACK_##chip(mask) \	RESTORE_MOST);#endif