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Annotation of sys/arch/i386/i386/apmcall.S, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: apmcall.S,v 1.5 2003/06/03 20:10:31 mickey Exp $      */
                      2:
                      3: /*
                      4:  * Copyright (c) 2000,2001 Michael Shalayeff
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  *
                     16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     17:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     18:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     19:  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
                     20:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
                     21:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
                     22:  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
                     24:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
                     25:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
                     26:  * THE POSSIBILITY OF SUCH DAMAGE.
                     27:  */
                     28:
                     29: #include <machine/asm.h>
                     30:
                     31: #ifndef        APM_DISABLE_INTERRUPTS
                     32: #define        APM_DISABLE_INTERRUPTS  1
                     33: #endif /* APM_DISABLE_INTERRUPTS */
                     34:
                     35:        .data
                     36:        .globl  _C_LABEL(apm_ep)
                     37:        .globl  _C_LABEL(apm_cli)
                     38: _C_LABEL(apm_cli):
                     39:        .long   APM_DISABLE_INTERRUPTS
                     40: /*
                     41:  * int apmcall(u_int f, int dev, struct apmregs *r)
                     42:  *
                     43:  */
                     44:        .text
                     45: ENTRY(apmcall)
                     46:        pushl   %ebp
                     47:        movl    %esp, %ebp
                     48:        pushl   %ebx
                     49:        pushl   %esi
                     50:        pushl   %edi
                     51:
                     52:        movl    16(%ebp), %ebx
                     53:        movl    8(%ebx), %ecx
                     54:        movl    12(%ebx), %edx
                     55:        movl    12(%ebp), %ebx
                     56:
                     57:        pushfl
                     58:
                     59:        cmp     $0, _C_LABEL(apm_cli)
                     60:        je      1f
                     61:        cli
                     62: 1:
                     63: #if defined(DEBUG) || defined(DIAGNOSTIC)
                     64:        pushl   %ds
                     65:        pushl   %es
                     66:        pushl   %fs
                     67:        pushl   %gs
                     68:        xorl    %eax, %eax
                     69:        movl    %eax, %ds
                     70:        movl    %eax, %es
                     71:        movl    %eax, %fs
                     72:        movl    %eax, %gs
                     73: #endif
                     74:        movl    8(%ebp), %eax
                     75:
                     76:        clc
                     77:        lcall   %cs:*(_C_LABEL(apm_ep))
                     78:        pushl   %eax
                     79:        setc    %al
                     80:        movzbl  %al, %esi
                     81:        popl    %eax
                     82:
                     83: #if defined(DEBUG) || defined(DIAGNOSTIC)
                     84:        popl    %gs
                     85:        popl    %fs
                     86:        popl    %es
                     87:        popl    %ds
                     88: #endif
                     89:        popfl
                     90:
                     91:        movl    16(%ebp), %edi
                     92:        movl    %eax, 0(%edi)
                     93:        movl    %ebx, 4(%edi)
                     94:        movl    %ecx, 8(%edi)
                     95:        movl    %edx, 12(%edi)
                     96:
                     97:        testl   $0xff00, %eax
                     98:        jnz     1f
                     99:        xorl    %esi, %esi
                    100: 1:
                    101:        movl    %esi, %eax
                    102:
                    103:        popl    %edi
                    104:        popl    %esi
                    105:        popl    %ebx
                    106:        popl    %ebp
                    107:        ret
                    108:
                    109:        .end