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simons |
#ifndef _ASM_IRQ_H
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#define _ASM_IRQ_H
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/*
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* linux/include/asm/irq.h
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*
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* (C) 1992, 1993 Linus Torvalds
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*
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* IRQ/IPI changes taken from work by Thomas Radke <tomsoft@informatik.tu-chemnitz.de>
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*/
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#include <linux/linkage.h>
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#include <asm/segment.h>
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#define NR_IRQS 16
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#define TIMER_IRQ 0
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extern void disable_irq(unsigned int);
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extern void enable_irq(unsigned int);
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#define __STR(x) #x
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#define STR(x) __STR(x)
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#define SAVE_ALL \
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"cld\n\t" \
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"push %gs\n\t" \
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"push %fs\n\t" \
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"push %es\n\t" \
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"push %ds\n\t" \
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"pushl %eax\n\t" \
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"pushl %ebp\n\t" \
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"pushl %edi\n\t" \
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"pushl %esi\n\t" \
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"pushl %edx\n\t" \
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"pushl %ecx\n\t" \
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"pushl %ebx\n\t" \
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"movl $" STR(KERNEL_DS) ",%edx\n\t" \
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"mov %dx,%ds\n\t" \
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"mov %dx,%es\n\t" \
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"movl $" STR(USER_DS) ",%edx\n\t" \
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"mov %dx,%fs\n\t" \
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"movl $0,%edx\n\t" \
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"movl %edx,%db7\n\t"
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/*
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* SAVE_MOST/RESTORE_MOST is used for the faster version of IRQ handlers,
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* installed by using the SA_INTERRUPT flag. These kinds of IRQ's don't
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* call the routines that do signal handling etc on return, and can have
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* more relaxed register-saving etc. They are also atomic, and are thus
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* suited for small, fast interrupts like the serial lines or the harddisk
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* drivers, which don't actually need signal handling etc.
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*
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* Also note that we actually save only those registers that are used in
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* C subroutines (%eax, %edx and %ecx), so if you do something weird,
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* you're on your own. The only segments that are saved (not counting the
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* automatic stack and code segment handling) are %ds and %es, and they
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* point to kernel space. No messing around with %fs here.
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*/
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#define SAVE_MOST \
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"cld\n\t" \
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"push %es\n\t" \
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"push %ds\n\t" \
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"pushl %eax\n\t" \
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"pushl %edx\n\t" \
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"pushl %ecx\n\t" \
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"movl $" STR(KERNEL_DS) ",%edx\n\t" \
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"mov %dx,%ds\n\t" \
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"mov %dx,%es\n\t"
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#define RESTORE_MOST \
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"popl %ecx\n\t" \
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"popl %edx\n\t" \
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"popl %eax\n\t" \
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"pop %ds\n\t" \
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"pop %es\n\t" \
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"iret"
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/*
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* The "inb" instructions are not needed, but seem to change the timings
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* a bit - without them it seems that the harddisk driver won't work on
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* all hardware. Arghh.
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*/
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#define ACK_FIRST(mask,nr) \
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"inb $0x21,%al\n\t" \
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"jmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:\torb $" #mask ","SYMBOL_NAME_STR(cache_21)"\n\t" \
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"movb "SYMBOL_NAME_STR(cache_21)",%al\n\t" \
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"outb %al,$0x21\n\t" \
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"jmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:\tmovb $0x20,%al\n\t" \
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"outb %al,$0x20\n\t"
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#define ACK_SECOND(mask,nr) \
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"inb $0xA1,%al\n\t" \
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"jmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:\torb $" #mask ","SYMBOL_NAME_STR(cache_A1)"\n\t" \
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"movb "SYMBOL_NAME_STR(cache_A1)",%al\n\t" \
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"outb %al,$0xA1\n\t" \
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"jmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:\tmovb $0x20,%al\n\t" \
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"outb %al,$0xA0\n\t" \
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"jmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:\toutb %al,$0x20\n\t"
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/* do not modify the ISR nor the cache_A1 variable */
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#define MSGACK_SECOND(mask,nr) \
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"inb $0xA1,%al\n\t" \
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"jmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:\tmovb $0x20,%al\n\t" \
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"outb %al,$0xA0\n\t" \
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"jmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:\toutb %al,$0x20\n\t"
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#define UNBLK_FIRST(mask) \
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"inb $0x21,%al\n\t" \
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"jmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:\tandb $~(" #mask "),"SYMBOL_NAME_STR(cache_21)"\n\t" \
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"movb "SYMBOL_NAME_STR(cache_21)",%al\n\t" \
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"outb %al,$0x21\n\t"
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#define UNBLK_SECOND(mask) \
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"inb $0xA1,%al\n\t" \
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"jmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:\tandb $~(" #mask "),"SYMBOL_NAME_STR(cache_A1)"\n\t" \
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"movb "SYMBOL_NAME_STR(cache_A1)",%al\n\t" \
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"outb %al,$0xA1\n\t"
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#define IRQ_NAME2(nr) nr##_interrupt(void)
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#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
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#define FAST_IRQ_NAME(nr) IRQ_NAME2(fast_IRQ##nr)
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#define BAD_IRQ_NAME(nr) IRQ_NAME2(bad_IRQ##nr)
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#ifdef __SMP__
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#ifndef __SMP_PROF__
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#define SMP_PROF_INT_SPINS
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#define SMP_PROF_IPI_CNT
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#else
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#define SMP_PROF_INT_SPINS "incl "SYMBOL_NAME_STR(smp_spins)"(,%eax,4)\n\t"
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#define SMP_PROF_IPI_CNT "incl "SYMBOL_NAME_STR(ipi_count)"\n\t"
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#endif
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#define GET_PROCESSOR_ID \
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"movl "SYMBOL_NAME_STR(apic_reg)", %edx\n\t" \
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"movl 32(%edx), %eax\n\t" \
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"shrl $24,%eax\n\t" \
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"andl $0x0F,%eax\n"
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#define ENTER_KERNEL \
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"pushl %eax\n\t" \
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"pushl %ebx\n\t" \
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"pushl %ecx\n\t" \
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"pushl %edx\n\t" \
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"pushfl\n\t" \
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"cli\n\t" \
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"movl $6000, %ebx\n\t" \
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"movl "SYMBOL_NAME_STR(smp_loops_per_tick)", %ecx\n\t" \
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GET_PROCESSOR_ID \
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"btsl $" STR(SMP_FROM_INT) ","SYMBOL_NAME_STR(smp_proc_in_lock)"(,%eax,4)\n\t" \
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"1: " \
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"lock\n\t" \
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"btsl $0, "SYMBOL_NAME_STR(kernel_flag)"\n\t" \
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"jnc 3f\n\t" \
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"cmpb "SYMBOL_NAME_STR(active_kernel_processor)", %al\n\t" \
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"je 4f\n\t" \
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"cmpb "SYMBOL_NAME_STR(boot_cpu_id)", %al\n\t" \
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"jne 2f\n\t" \
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"movb $1, "SYMBOL_NAME_STR(smp_blocked_interrupt_pending)"\n\t" \
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"2: " \
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SMP_PROF_INT_SPINS \
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"btl %eax, "SYMBOL_NAME_STR(smp_invalidate_needed)"\n\t" \
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"jnc 5f\n\t" \
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"lock\n\t" \
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"btrl %eax, "SYMBOL_NAME_STR(smp_invalidate_needed)"\n\t" \
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| 185 |
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"jnc 5f\n\t" \
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"movl %cr3,%edx\n\t" \
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"movl %edx,%cr3\n" \
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"5: btl $0, "SYMBOL_NAME_STR(kernel_flag)"\n\t" \
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"jnc 1b\n\t" \
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"cmpb "SYMBOL_NAME_STR(active_kernel_processor)", %al\n\t" \
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"je 4f\n\t" \
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"decl %ecx\n\t" \
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"jne 2b\n\t" \
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"decl %ebx\n\t" \
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"jne 6f\n\t" \
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"call "SYMBOL_NAME_STR(irq_deadlock_detected)"\n\t" \
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"6: movl "SYMBOL_NAME_STR(smp_loops_per_tick)", %ecx\n\t" \
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"cmpb "SYMBOL_NAME_STR(boot_cpu_id)", %al\n\t" \
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"jne 2b\n\t" \
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"incl "SYMBOL_NAME_STR(jiffies)"\n\t" \
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"jmp 2b\n\t" \
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"3: " \
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"movb %al, "SYMBOL_NAME_STR(active_kernel_processor)"\n\t" \
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"4: " \
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"incl "SYMBOL_NAME_STR(kernel_counter)"\n\t" \
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"cmpb "SYMBOL_NAME_STR(boot_cpu_id)", %al\n\t" \
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"jne 7f\n\t" \
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| 208 |
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"movb $0, "SYMBOL_NAME_STR(smp_blocked_interrupt_pending)"\n\t" \
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"7: " \
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| 210 |
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"popfl\n\t" \
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| 211 |
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"popl %edx\n\t" \
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| 212 |
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"popl %ecx\n\t" \
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| 213 |
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"popl %ebx\n\t" \
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| 214 |
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"popl %eax\n\t"
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#define LEAVE_KERNEL \
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GET_PROCESSOR_ID \
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"btrl $" STR(SMP_FROM_INT) ","SYMBOL_NAME_STR(smp_proc_in_lock)"(,%eax,4)\n\t" \
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| 219 |
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"pushfl\n\t" \
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| 220 |
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"cli\n\t" \
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| 221 |
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"decl "SYMBOL_NAME_STR(kernel_counter)"\n\t" \
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| 222 |
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"jnz 1f\n\t" \
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| 223 |
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"movb "SYMBOL_NAME_STR(saved_active_kernel_processor)",%al\n\t" \
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| 224 |
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"movb %al,"SYMBOL_NAME_STR(active_kernel_processor)"\n\t" \
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| 225 |
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"cmpb $" STR (NO_PROC_ID) ",%al\n\t" \
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"jne 1f\n\t" \
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| 227 |
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"lock\n\t" \
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| 228 |
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"btrl $0, "SYMBOL_NAME_STR(kernel_flag)"\n\t" \
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| 229 |
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"1: " \
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| 230 |
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"popfl\n\t"
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/*
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* the syscall count inc is a gross hack because ret_from_syscall is used by both irq and
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| 235 |
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* syscall return paths (urghh).
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*/
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| 237 |
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| 238 |
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#define BUILD_IRQ(chip,nr,mask) \
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| 239 |
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asmlinkage void IRQ_NAME(nr); \
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| 240 |
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asmlinkage void FAST_IRQ_NAME(nr); \
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| 241 |
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asmlinkage void BAD_IRQ_NAME(nr); \
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| 242 |
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__asm__( \
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| 243 |
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"\n"__ALIGN_STR"\n" \
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| 244 |
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SYMBOL_NAME_STR(IRQ) #nr "_interrupt:\n\t" \
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| 245 |
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"pushl $-"#nr"-2\n\t" \
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| 246 |
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SAVE_ALL \
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| 247 |
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ENTER_KERNEL \
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| 248 |
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ACK_##chip(mask,(nr&7)) \
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| 249 |
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"incl "SYMBOL_NAME_STR(intr_count)"\n\t"\
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| 250 |
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"sti\n\t" \
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| 251 |
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"movl %esp,%ebx\n\t" \
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| 252 |
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"pushl %ebx\n\t" \
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| 253 |
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"pushl $" #nr "\n\t" \
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| 254 |
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"call "SYMBOL_NAME_STR(do_IRQ)"\n\t" \
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| 255 |
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"addl $8,%esp\n\t" \
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| 256 |
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"cli\n\t" \
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| 257 |
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UNBLK_##chip(mask) \
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| 258 |
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"decl "SYMBOL_NAME_STR(intr_count)"\n\t" \
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| 259 |
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"incl "SYMBOL_NAME_STR(syscall_count)"\n\t" \
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| 260 |
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"jmp ret_from_sys_call\n" \
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| 261 |
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"\n"__ALIGN_STR"\n" \
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| 262 |
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SYMBOL_NAME_STR(fast_IRQ) #nr "_interrupt:\n\t" \
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| 263 |
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SAVE_MOST \
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| 264 |
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ENTER_KERNEL \
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| 265 |
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ACK_##chip(mask,(nr&7)) \
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| 266 |
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"incl "SYMBOL_NAME_STR(intr_count)"\n\t" \
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| 267 |
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"pushl $" #nr "\n\t" \
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| 268 |
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"call "SYMBOL_NAME_STR(do_fast_IRQ)"\n\t" \
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| 269 |
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"addl $4,%esp\n\t" \
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| 270 |
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"cli\n\t" \
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| 271 |
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UNBLK_##chip(mask) \
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| 272 |
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"decl "SYMBOL_NAME_STR(intr_count)"\n\t" \
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| 273 |
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LEAVE_KERNEL \
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| 274 |
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RESTORE_MOST \
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| 275 |
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"\n"__ALIGN_STR"\n" \
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| 276 |
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SYMBOL_NAME_STR(bad_IRQ) #nr "_interrupt:\n\t" \
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| 277 |
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SAVE_MOST \
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| 278 |
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ENTER_KERNEL \
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| 279 |
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ACK_##chip(mask,(nr&7)) \
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| 280 |
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LEAVE_KERNEL \
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| 281 |
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RESTORE_MOST);
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| 282 |
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| 283 |
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| 284 |
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#define BUILD_TIMER_IRQ(chip,nr,mask) \
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| 285 |
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asmlinkage void IRQ_NAME(nr); \
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| 286 |
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asmlinkage void FAST_IRQ_NAME(nr); \
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| 287 |
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asmlinkage void BAD_IRQ_NAME(nr); \
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| 288 |
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__asm__( \
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| 289 |
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"\n"__ALIGN_STR"\n" \
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| 290 |
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SYMBOL_NAME_STR(fast_IRQ) #nr "_interrupt:\n\t" \
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| 291 |
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SYMBOL_NAME_STR(bad_IRQ) #nr "_interrupt:\n\t" \
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| 292 |
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|
SYMBOL_NAME_STR(IRQ) #nr "_interrupt:\n\t" \
|
| 293 |
|
|
"pushl $-"#nr"-2\n\t" \
|
| 294 |
|
|
SAVE_ALL \
|
| 295 |
|
|
ENTER_KERNEL \
|
| 296 |
|
|
ACK_##chip(mask,(nr&7)) \
|
| 297 |
|
|
"incl "SYMBOL_NAME_STR(intr_count)"\n\t"\
|
| 298 |
|
|
"movl %esp,%ebx\n\t" \
|
| 299 |
|
|
"pushl %ebx\n\t" \
|
| 300 |
|
|
"pushl $" #nr "\n\t" \
|
| 301 |
|
|
"call "SYMBOL_NAME_STR(do_IRQ)"\n\t" \
|
| 302 |
|
|
"addl $8,%esp\n\t" \
|
| 303 |
|
|
"cli\n\t" \
|
| 304 |
|
|
UNBLK_##chip(mask) \
|
| 305 |
|
|
"decl "SYMBOL_NAME_STR(intr_count)"\n\t" \
|
| 306 |
|
|
"incl "SYMBOL_NAME_STR(syscall_count)"\n\t" \
|
| 307 |
|
|
"jmp ret_from_sys_call\n");
|
| 308 |
|
|
|
| 309 |
|
|
|
| 310 |
|
|
/*
|
| 311 |
|
|
* Message pass must be a fast IRQ..
|
| 312 |
|
|
*/
|
| 313 |
|
|
|
| 314 |
|
|
#define BUILD_MSGIRQ(chip,nr,mask) \
|
| 315 |
|
|
asmlinkage void IRQ_NAME(nr); \
|
| 316 |
|
|
asmlinkage void FAST_IRQ_NAME(nr); \
|
| 317 |
|
|
asmlinkage void BAD_IRQ_NAME(nr); \
|
| 318 |
|
|
__asm__( \
|
| 319 |
|
|
"\n"__ALIGN_STR"\n" \
|
| 320 |
|
|
SYMBOL_NAME_STR(IRQ) #nr "_interrupt:\n\t" \
|
| 321 |
|
|
SYMBOL_NAME_STR(fast_IRQ) #nr "_interrupt:\n\t" \
|
| 322 |
|
|
SAVE_MOST \
|
| 323 |
|
|
MSGACK_##chip(mask,(nr&7)) \
|
| 324 |
|
|
SMP_PROF_IPI_CNT \
|
| 325 |
|
|
"pushl $" #nr "\n\t" \
|
| 326 |
|
|
"call "SYMBOL_NAME_STR(do_fast_IRQ)"\n\t" \
|
| 327 |
|
|
"addl $4,%esp\n\t" \
|
| 328 |
|
|
"cli\n\t" \
|
| 329 |
|
|
RESTORE_MOST \
|
| 330 |
|
|
"\n"__ALIGN_STR"\n" \
|
| 331 |
|
|
SYMBOL_NAME_STR(bad_IRQ) #nr "_interrupt:\n\t" \
|
| 332 |
|
|
SAVE_MOST \
|
| 333 |
|
|
ACK_##chip(mask,(nr&7)) \
|
| 334 |
|
|
RESTORE_MOST);
|
| 335 |
|
|
|
| 336 |
|
|
#define BUILD_RESCHEDIRQ(nr) \
|
| 337 |
|
|
asmlinkage void IRQ_NAME(nr); \
|
| 338 |
|
|
__asm__( \
|
| 339 |
|
|
"\n"__ALIGN_STR"\n" \
|
| 340 |
|
|
SYMBOL_NAME_STR(IRQ) #nr "_interrupt:\n\t" \
|
| 341 |
|
|
"pushl $-"#nr"-2\n\t" \
|
| 342 |
|
|
SAVE_ALL \
|
| 343 |
|
|
ENTER_KERNEL \
|
| 344 |
|
|
"incl "SYMBOL_NAME_STR(intr_count)"\n\t"\
|
| 345 |
|
|
"sti\n\t" \
|
| 346 |
|
|
"movl %esp,%ebx\n\t" \
|
| 347 |
|
|
"pushl %ebx\n\t" \
|
| 348 |
|
|
"pushl $" #nr "\n\t" \
|
| 349 |
|
|
"call "SYMBOL_NAME_STR(smp_reschedule_irq)"\n\t" \
|
| 350 |
|
|
"addl $8,%esp\n\t" \
|
| 351 |
|
|
"cli\n\t" \
|
| 352 |
|
|
"decl "SYMBOL_NAME_STR(intr_count)"\n\t" \
|
| 353 |
|
|
"incl "SYMBOL_NAME_STR(syscall_count)"\n\t" \
|
| 354 |
|
|
"jmp ret_from_sys_call\n");
|
| 355 |
|
|
#else
|
| 356 |
|
|
|
| 357 |
|
|
#define BUILD_IRQ(chip,nr,mask) \
|
| 358 |
|
|
asmlinkage void IRQ_NAME(nr); \
|
| 359 |
|
|
asmlinkage void FAST_IRQ_NAME(nr); \
|
| 360 |
|
|
asmlinkage void BAD_IRQ_NAME(nr); \
|
| 361 |
|
|
__asm__( \
|
| 362 |
|
|
"\n"__ALIGN_STR"\n" \
|
| 363 |
|
|
SYMBOL_NAME_STR(IRQ) #nr "_interrupt:\n\t" \
|
| 364 |
|
|
"pushl $-"#nr"-2\n\t" \
|
| 365 |
|
|
SAVE_ALL \
|
| 366 |
|
|
ACK_##chip(mask,(nr&7)) \
|
| 367 |
|
|
"incl "SYMBOL_NAME_STR(intr_count)"\n\t"\
|
| 368 |
|
|
"sti\n\t" \
|
| 369 |
|
|
"movl %esp,%ebx\n\t" \
|
| 370 |
|
|
"pushl %ebx\n\t" \
|
| 371 |
|
|
"pushl $" #nr "\n\t" \
|
| 372 |
|
|
"call "SYMBOL_NAME_STR(do_IRQ)"\n\t" \
|
| 373 |
|
|
"addl $8,%esp\n\t" \
|
| 374 |
|
|
"cli\n\t" \
|
| 375 |
|
|
UNBLK_##chip(mask) \
|
| 376 |
|
|
"decl "SYMBOL_NAME_STR(intr_count)"\n\t" \
|
| 377 |
|
|
"jmp ret_from_sys_call\n" \
|
| 378 |
|
|
"\n"__ALIGN_STR"\n" \
|
| 379 |
|
|
SYMBOL_NAME_STR(fast_IRQ) #nr "_interrupt:\n\t" \
|
| 380 |
|
|
SAVE_MOST \
|
| 381 |
|
|
ACK_##chip(mask,(nr&7)) \
|
| 382 |
|
|
"incl "SYMBOL_NAME_STR(intr_count)"\n\t" \
|
| 383 |
|
|
"pushl $" #nr "\n\t" \
|
| 384 |
|
|
"call "SYMBOL_NAME_STR(do_fast_IRQ)"\n\t" \
|
| 385 |
|
|
"addl $4,%esp\n\t" \
|
| 386 |
|
|
"cli\n\t" \
|
| 387 |
|
|
UNBLK_##chip(mask) \
|
| 388 |
|
|
"decl "SYMBOL_NAME_STR(intr_count)"\n\t" \
|
| 389 |
|
|
RESTORE_MOST \
|
| 390 |
|
|
"\n"__ALIGN_STR"\n" \
|
| 391 |
|
|
SYMBOL_NAME_STR(bad_IRQ) #nr "_interrupt:\n\t" \
|
| 392 |
|
|
SAVE_MOST \
|
| 393 |
|
|
ACK_##chip(mask,(nr&7)) \
|
| 394 |
|
|
RESTORE_MOST);
|
| 395 |
|
|
|
| 396 |
|
|
#define BUILD_TIMER_IRQ(chip,nr,mask) \
|
| 397 |
|
|
asmlinkage void IRQ_NAME(nr); \
|
| 398 |
|
|
asmlinkage void FAST_IRQ_NAME(nr); \
|
| 399 |
|
|
asmlinkage void BAD_IRQ_NAME(nr); \
|
| 400 |
|
|
__asm__( \
|
| 401 |
|
|
"\n"__ALIGN_STR"\n" \
|
| 402 |
|
|
SYMBOL_NAME_STR(fast_IRQ) #nr "_interrupt:\n\t" \
|
| 403 |
|
|
SYMBOL_NAME_STR(bad_IRQ) #nr "_interrupt:\n\t" \
|
| 404 |
|
|
SYMBOL_NAME_STR(IRQ) #nr "_interrupt:\n\t" \
|
| 405 |
|
|
"pushl $-"#nr"-2\n\t" \
|
| 406 |
|
|
SAVE_ALL \
|
| 407 |
|
|
ACK_##chip(mask,(nr&7)) \
|
| 408 |
|
|
"incl "SYMBOL_NAME_STR(intr_count)"\n\t"\
|
| 409 |
|
|
"movl %esp,%ebx\n\t" \
|
| 410 |
|
|
"pushl %ebx\n\t" \
|
| 411 |
|
|
"pushl $" #nr "\n\t" \
|
| 412 |
|
|
"call "SYMBOL_NAME_STR(do_IRQ)"\n\t" \
|
| 413 |
|
|
"addl $8,%esp\n\t" \
|
| 414 |
|
|
"cli\n\t" \
|
| 415 |
|
|
UNBLK_##chip(mask) \
|
| 416 |
|
|
"decl "SYMBOL_NAME_STR(intr_count)"\n\t" \
|
| 417 |
|
|
"jmp ret_from_sys_call\n");
|
| 418 |
|
|
|
| 419 |
|
|
#endif
|
| 420 |
|
|
#endif
|
