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Annotation of linux/kernel/asm.s, revision 1.1.1.6

1.1       root        1: /*
1.1.1.2   root        2:  *  linux/kernel/asm.s
                      3:  *
                      4:  *  (C) 1991  Linus Torvalds
                      5:  */
                      6: 
                      7: /*
1.1.1.6 ! root        8:  * asm.s contains the low-level code for interrupts that cannot
        !             9:  * result in an task-switch. These are things like the hd- and
        !            10:  * floppy-interrupt etc. With these interrupts, we don't have to
        !            11:  * care about the stack layout etc.
1.1       root       12:  */
                     13: 
1.1.1.6 ! root       14: .globl _floppy_interrupt,_parallel_interrupt
1.1       root       15: 
1.1.1.6 ! root       16: _floppy_interrupt:
        !            17:        cld
1.1.1.5   root       18:        pushl %eax
                     19:        pushl %ecx
1.1       root       20:        pushl %edx
1.1.1.6 ! root       21:        push %ds
        !            22:        push %es
        !            23:        push %fs
        !            24:        movl $0x10,%eax
        !            25:        mov %ax,%ds
        !            26:        mov %ax,%es
        !            27:        movl $0x17,%eax
        !            28:        mov %ax,%fs
        !            29:        movb $0x20,%al
        !            30:        outb %al,$0x20          # EOI to interrupt controller #1
        !            31:        xorl %eax,%eax
        !            32:        xchgl _do_floppy,%eax
        !            33:        testl %eax,%eax
        !            34:        jne 1f
        !            35:        movl $_unexpected_floppy_interrupt,%eax
        !            36: 1:     call *%eax              # "interesting" way of handling intr.
        !            37:        pop %fs
        !            38:        pop %es
        !            39:        pop %ds
1.1.1.5   root       40:        popl %edx
1.1.1.6 ! root       41:        popl %ecx
1.1       root       42:        popl %eax
                     43:        iret
                     44: 
1.1.1.6 ! root       45: _parallel_interrupt:
        !            46:        cld
1.1.1.2   root       47:        pushl %eax
                     48:        movb $0x20,%al
                     49:        outb %al,$0x20
                     50:        popl %eax
1.1.1.6 ! root       51:        iret

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