diff options
Diffstat (limited to 'sys/arch/i386/stand/libsa/biosdisk.S')
| -rw-r--r-- | sys/arch/i386/stand/libsa/biosdisk.S | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/sys/arch/i386/stand/libsa/biosdisk.S b/sys/arch/i386/stand/libsa/biosdisk.S deleted file mode 100644 index 196bb723de3..00000000000 --- a/sys/arch/i386/stand/libsa/biosdisk.S +++ /dev/null @@ -1,219 +0,0 @@ -/* $OpenBSD: biosdisk.S,v 1.13 1997/07/30 19:40:56 flipk Exp $ */ - -/* - * Copyright (c) 1997 Michael Shalayeff - * 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. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Michael Shalayeff. - * 4. 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 REGENTS OR CONTRIBUTORS 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/asm.h> -#define _LOCORE -#include <machine/biosvar.h> -#include "debug_md.h" -#undef _LOCORE -#include <assym.h> - - - .globl _C_LABEL(errno) /* XXX used for bios errors */ - .globl _C_LABEL(BIOS_regs) -/* - * int biosread(dev,cyl,head,sect,nsect,buf) - * read number of sectors from disk - */ -ENTRY(biosread) - pushl %ebp - movl %esp, %ebp - pushl %ecx - pushl %ebx - pushl %edi - pushl %es - - movb 8(%ebp), %dl # device - movw 12(%ebp), %cx - xchgb %ch, %cl # cylinder; the highest 2 bits of cyl is in %cl - rorb $2, %cl - movb 16(%ebp), %dh # head - movb 20(%ebp), %al - orb %al, %cl - incb %cl # sector; sec starts from 1, not 0 - movb $0x2, %ah # subfunction - movb 24(%ebp), %al # number of sectors - movl 28(%ebp), %ebx # offset - movl %ebx, %edi # split off for seg:off pair - andl $0xf, %ebx # atomic read for up to 64k - shrl $4, %edi - movl %edi, _C_LABEL(BIOS_regs)+biosr_es - - DOINT(0x13) - movb $0, %al - jnc 1f - movb %ah, %al -1: - movzbl %al, %eax # return value in %ax - - popl %es - popl %edi - popl %ebx - popl %ecx - popl %ebp - ret - -ENTRY(bioswrite) - movl $1, %eax - ret - -/* - * - * u_int16_t biosdinfo(): return a word that represents the - * max number of sectors and heads and drives for this device - * - */ - -ENTRY(biosdinfo) - pushl %ebp - movl %esp, %ebp - pushl %ebx - pushl %ecx - - movb 8(%ebp), %dl # drive # - movb $0x08, %ah # ask for disk info - DOINT(0x13) - movb $1, %ah # max head - movb $18, %al # max sector - jc 1f - - /* form a word w/ nhead/nsect packed */ - movb %dh, %ah # max head - andb $0x3f, %cl # mask of cylinder gunk - movb %cl, %al # max sector (and # sectors) -1: - popl %ecx - popl %ebx - popl %ebp - ret - - -/* - * - * biosdreset(): reset disk system - * - */ - -ENTRY(biosdreset) - pushl %ebx - pushl %ecx - - movb $0x00, %ah # reset disk system - movb 8(%ebp), %dl # drive # - DOINT(0x13) - - popl %ecx - popl %ebx - ret - -/* - * int EDDcheck(dev) - * check the features supported by the bios for the drive - */ -ENTRY(EDDcheck) - pushl %ebp - movl %esp, %ebp - pushl %ecx - pushl %ebx - - movb $0x44, %ah - movw $0x55aa, %bx - movl 8(%ebp), %edx - DOINT(0x13) - movl $-1, %eax - jc 1f - cmpw $0xaa55, %bx - jne 1f - xorl %eax, %eax - movw %cx, %ax /* API support bitmap */ -1: - popl %ebx - popl %ecx - popl %ebp - ret - - .data - -ddp: .byte 0x10 # size of packet - .byte 0 # reserved - .word 0 # # of blocks to transfer - .long 0 # address to read/write to - .long 0,0 # start to read here - - .text -/* - * int EDDread(dev,abs_sect,nsect,buf) - * read nsect starting on absolute sector #abs_sect into buf - */ -ENTRY(EDDread) - pushl %ebp - movl %esp, %ebp - pushl %ecx - pushl %ebx - pushl %esi - - movl 8(%ebp), %edx /* drive */ - movl ddp, %esi - movl 20(%ebp), %eax /* nblks */ - movw %ax, 2(%esi) - movl 12(%ebp), %eax /* abs starting sector */ - movl %eax, 8(%esi) - movl 16(%ebp), %eax - movl %eax, 12(%esi) - movl 24(%ebp), %eax /* buffer */ - movl %eax, 4(%esi) - movb $0x42, %ah - DOINT(0x13) - jnc 1f - xorl %eax, %eax - -1: movzbl %ah, %eax - movl %eax, _C_LABEL(errno) - movw 2(%esi), %ax /* return number of blocks read ok */ - - popl %esi - popl %ebx - popl %ecx - popl %ebp - ret - -/* - * int EDDwrite(dev,abs_sect,nsect,buf) - * read nsect starting on absolute sector #abs_sect into buf - */ -ENTRY(EDDwrite) - movl $19, _C_LABEL(errno) - movl $0, %eax - ret - |