split out apmcall and bioscall into separate files, for ease of modular
construction into other drivers (eventually)
This commit is contained in:
jtk
parent
2aa5d6b785
commit
a3cd5fc7ba
|
|
@ -0,0 +1,98 @@
|
|||
/* $NetBSD: apmcall.s,v 1.1 1997/10/14 03:54:18 jtk Exp $ */
|
||||
/*
|
||||
* Copyright (c) 1997 John T. Kohl
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||||
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
||||
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||||
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
||||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#include "assym.h"
|
||||
#include <machine/asm.h>
|
||||
#include <machine/apmvar.h>
|
||||
|
||||
/*
|
||||
* int apmcall(int function, struct apmregs *regs):
|
||||
* call the APM protected mode bios function FUNCTION for BIOS selection
|
||||
* WHICHBIOS.
|
||||
* Fills in *regs with registers as returned by APM.
|
||||
* returns nonzero if error returned by APM.
|
||||
*/
|
||||
.data
|
||||
apmstatus: .long 0
|
||||
.text
|
||||
NENTRY(apmcall)
|
||||
pushl %ebp
|
||||
movl %esp,%ebp
|
||||
pushl %esi
|
||||
pushl %edi
|
||||
pushl %ebx
|
||||
|
||||
#if defined(DEBUG) || defined(DIAGNOSTIC)
|
||||
pushl %ds
|
||||
pushl %es
|
||||
pushl %fs
|
||||
pushl %gs
|
||||
xorl %ax,%ax
|
||||
/* movl %ax,%ds # can't toss %ds, we need it for apmstatus*/
|
||||
movl %ax,%es
|
||||
movl %ax,%fs
|
||||
movl %ax,%gs
|
||||
#endif
|
||||
movb %cs:8(%ebp),%al
|
||||
movb $0x53,%ah
|
||||
movl %cs:12(%ebp),%ebx
|
||||
movw %cs:APMREG_CX(%ebx),%cx
|
||||
movw %cs:APMREG_DX(%ebx),%dx
|
||||
movw %cs:APMREG_BX(%ebx),%bx
|
||||
pushfl
|
||||
cli
|
||||
pushl %ds
|
||||
/* Now call the 32-bit code segment entry point */
|
||||
lcall %cs:(_apminfo+APM_ENTRY)
|
||||
popl %ds
|
||||
setc apmstatus
|
||||
popfl
|
||||
#if defined(DEBUG) || defined(DIAGNOSTIC)
|
||||
popl %gs
|
||||
popl %fs
|
||||
popl %es
|
||||
popl %ds # see above
|
||||
#endif
|
||||
movl 12(%ebp),%esi
|
||||
movw %ax,APMREG_AX(%esi)
|
||||
movw %bx,APMREG_BX(%esi)
|
||||
movw %cx,APMREG_CX(%esi)
|
||||
movw %dx,APMREG_DX(%esi)
|
||||
/* todo: do something with %edi? */
|
||||
movl $1,%eax
|
||||
cmpl $0,apmstatus
|
||||
jne 1f
|
||||
xorl %eax,%eax
|
||||
1:
|
||||
popl %ebx
|
||||
popl %edi
|
||||
popl %esi
|
||||
popl %ebp
|
||||
ret
|
||||
|
|
@ -0,0 +1,79 @@
|
|||
/* $NetBSD: bioscall.s,v 1.1 1997/10/14 03:54:20 jtk Exp $ */
|
||||
/*
|
||||
* Copyright (c) 1997 John T. Kohl
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||||
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
||||
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||||
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
||||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <machine/param.h>
|
||||
#include <machine/bioscall.h>
|
||||
|
||||
#include <machine/asm.h>
|
||||
|
||||
.globl _PTDpaddr /* from locore.s */
|
||||
|
||||
_biostramp_image:
|
||||
.globl _biostramp_image
|
||||
|
||||
8:
|
||||
#include "i386/bioscall/biostramp.inc"
|
||||
9:
|
||||
|
||||
_biostramp_image_size:
|
||||
.globl _biostramp_image_size
|
||||
.long 9b - 8b
|
||||
|
||||
/*
|
||||
* void bioscall(int function, struct apmregs *regs):
|
||||
* call the BIOS interrupt "function" from real mode with
|
||||
* registers as specified in "regs"
|
||||
* for the flags, though, only these flags are passed to the BIOS--
|
||||
* the remainder come from the flags register at the time of the call:
|
||||
* (PSL_C|PSL_PF|PSL_AF|PSL_Z|PSL_N|PSL_D|PSL_V)
|
||||
*
|
||||
* Fills in *regs with registers as returned by BIOS.
|
||||
*/
|
||||
NENTRY(bioscall)
|
||||
pushl %ebp
|
||||
movl %esp,%ebp /* set up frame ptr */
|
||||
|
||||
movl %cr3,%eax /* save PTDB register */
|
||||
pushl %eax
|
||||
|
||||
movl _PTDpaddr,%eax /* install proc0 PTD */
|
||||
movl %eax,%cr3
|
||||
|
||||
movl $(BIOSTRAMP_BASE),%eax /* address of trampoline area */
|
||||
pushl 12(%ebp)
|
||||
pushl 8(%ebp)
|
||||
call %eax /* machdep.c initializes it */
|
||||
addl $8,%esp /* clear args from stack */
|
||||
|
||||
popl %eax
|
||||
movl %eax,%cr3 /* restore PTDB register */
|
||||
|
||||
leave
|
||||
ret
|
||||
Loading…
Reference in New Issue