d561028dac
Initially functionality is confined to 32-bit BIOS functions, however it is envisioned that BIOS support may be enlisted for other activities in the future.
60 lines
1.9 KiB
ArmAsm
60 lines
1.9 KiB
ArmAsm
/*-
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* Copyright (c) 1997 Jonathan Lemon
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*/
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/*
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* Functions for calling x86 BIOS functions from the BSD kernel
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*/
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#include <machine/asmacros.h>
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.text
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/*
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* bios32(caddr_t func_addr, bios32_args *args)
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*/
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ENTRY(bios32)
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pushl %ebx
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pushl %esi
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movl (2*4+2*4)(%esp), %esi
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movl 0(%esi), %eax
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movl 4(%esi), %ebx
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movl 8(%esi), %ecx
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movl 12(%esi), %edx
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movl (2*4+1*4)(%esp), %esi
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mov %cs, %di
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pushl %edi /* really lcall/lret */
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call %esi
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movl (2*4+2*4)(%esp), %esi
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movl %eax, 0(%esi)
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movl %ebx, 4(%esi)
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movl %ecx, 8(%esi)
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movl %edx, 12(%esi)
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popl %esi
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popl %ebx
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ret
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