[i386] Kill off obsolete boot1a.s file
authorMichael Brown <mcb30@etherboot.org>
Wed, 18 Feb 2009 04:48:30 +0000 (04:48 +0000)
committerMichael Brown <mcb30@etherboot.org>
Wed, 18 Feb 2009 04:48:30 +0000 (04:48 +0000)
src/arch/i386/prefix/boot1a.s [deleted file]

diff --git a/src/arch/i386/prefix/boot1a.s b/src/arch/i386/prefix/boot1a.s
deleted file mode 100644 (file)
index 557462f..0000000
+++ /dev/null
@@ -1,410 +0,0 @@
-# This code is no longer used in Etherboot.  It is not maintained and
-# may not work.
-
-
-#
-# Copyright (c) 1998 Robert Nordier
-# All rights reserved.
-# Very small bootrom changes by Luigi Rizzo
-# <comment author="Luigi Rizzo">
-# I recently had the problem of downloading the etherboot code
-# from a hard disk partition instead of a floppy, and noticed that
-# floppyload.S does not do the job. With a bit of hacking to
-# the FreeBSD's boot1.s code, I managed to obtain a boot sector
-# which works both for floppies and hard disks -- basically you
-# do something like
-# 
-#      cat boot1a bin32/<yourcard>.lzrom > /dev/ad0s4
-# 
-# (or whatever is the HD partition you are using, I am using slice
-# 4 on FreeBSD) and you are up and running.
-# Then with "fdisk" you have to mark your partition as having type "1"
-# (which is listed as DOS-- but basically it must be something matching
-# the variable PRT_BSD in the assembly source below).
-# </comment>
-#
-# Redistribution and use in source and binary forms are freely
-# permitted provided that the above copyright notice and this
-# paragraph and the following disclaimer are duplicated in all
-# such forms.
-#
-# This software is provided "AS IS" and without any express or
-# implied warranties, including, without limitation, the implied
-# warranties of merchantability and fitness for a particular
-# purpose.
-#
-# Makefile:
-#boot1a: boot1a.out
-#      objcopy -S -O binary boot1a.out boot1a
-#
-#boot1a.out: boot1a.o
-#      ld -nostdlib -static -N -e start -Ttext 0x7c00 -o boot1a.out boot1a.o
-#
-#boot1a.o: boot1a.s
-#      as --defsym FLAGS=0x80 boot1a.s -o boot1a.o
-#
-#
-
-# $FreeBSD: src/sys/boot/i386/boot2/boot1.s,v 1.10.2.2 2000/07/07 21:12:32 jhb Exp $
-
-# Memory Locations
-               .set MEM_REL,0x700              # Relocation address
-               .set MEM_ARG,0x900              # Arguments
-               .set MEM_ORG,0x7c00             # Origin
-               .set MEM_BUF,0x8c00             # Load area
-               .set MEM_BTX,0x9000             # BTX start
-               .set MEM_JMP,0x9010             # BTX entry point
-               .set MEM_USR,0xa000             # Client start
-               .set BDA_BOOT,0x472             # Boot howto flag
-       
-# Partition Constants 
-               .set PRT_OFF,0x1be              # Partition offset
-               .set PRT_NUM,0x4                # Partitions
-               .set PRT_BSD,0x1                # Partition type
-
-# Flag Bits
-               .set FL_PACKET,0x80             # Packet mode
-
-# Misc. Constants
-               .set SIZ_PAG,0x1000             # Page size
-               .set SIZ_SEC,0x200              # Sector size
-
-               .globl start
-               .globl xread
-               .code16
-
-start:         jmp main                        # Start recognizably
-
-               .org 0x4,0x90
-# 
-# Trampoline used by boot2 to call read to read data from the disk via
-# the BIOS.  Call with:
-#
-# %cx:%ax      - long    - LBA to read in
-# %es:(%bx)    - caddr_t - buffer to read data into
-# %dl          - byte    - drive to read from
-# %dh          - byte    - num sectors to read
-# 
-
-xread:         push %ss                        # Address
-               pop %ds                         #  data
-#
-# Setup an EDD disk packet and pass it to read
-# 
-xread.1:                                       # Starting
-               pushl $0x0                      #  absolute
-               push %cx                        #  block
-               push %ax                        #  number
-               push %es                        # Address of
-               push %bx                        #  transfer buffer
-               xor %ax,%ax                     # Number of
-               movb %dh,%al                    #  blocks to
-               push %ax                        #  transfer
-               push $0x10                      # Size of packet
-               mov %sp,%bp                     # Packet pointer
-               callw read                      # Read from disk
-               lea 0x10(%bp),%sp               # Clear stack
-               lret                            # To far caller
-# 
-# Load the rest of boot2 and BTX up, copy the parts to the right locations,
-# and start it all up.
-#
-
-#
-# Setup the segment registers to flat addressing (segment 0) and setup the
-# stack to end just below the start of our code.
-# 
-main:          cld                             # String ops inc
-               xor %cx,%cx                     # Zero
-               mov %cx,%es                     # Address
-               mov %cx,%ds                     #  data
-               mov %cx,%ss                     # Set up
-               mov $start,%sp                  #  stack
-#
-# Relocate ourself to MEM_REL.  Since %cx == 0, the inc %ch sets
-# %cx == 0x100.
-# 
-               mov %sp,%si                     # Source
-               mov $MEM_REL,%di                # Destination
-               incb %ch                        # Word count
-               rep                             # Copy
-               movsw                           #  code
-#
-# If we are on a hard drive, then load the MBR and look for the first
-# FreeBSD slice.  We use the fake partition entry below that points to
-# the MBR when we call nread.  The first pass looks for the first active
-# FreeBSD slice.  The second pass looks for the first non-active FreeBSD
-# slice if the first one fails.
-# 
-               mov $part4,%si                  # Partition
-               cmpb $0x80,%dl                  # Hard drive?
-               jb main.4                       # No
-               movb $0x1,%dh                   # Block count
-               callw nread                     # Read MBR
-               mov $0x1,%cx                    # Two passes
-main.1:        mov $MEM_BUF+PRT_OFF,%si        # Partition table
-               movb $0x1,%dh                   # Partition
-main.2:        cmpb $PRT_BSD,0x4(%si)          # Our partition type?
-               jne main.3                      # No
-               jcxz main.5                     # If second pass
-               testb $0x80,(%si)               # Active?
-               jnz main.5                      # Yes
-main.3:        add $0x10,%si                   # Next entry
-               incb %dh                        # Partition
-               cmpb $0x1+PRT_NUM,%dh           # In table?
-               jb main.2                       # Yes
-               dec %cx                         # Do two
-               jcxz main.1                     #  passes
-#
-# If we get here, we didn't find any FreeBSD slices at all, so print an
-# error message and die.
-# 
-booterror:     mov $msg_part,%si               # Message
-               jmp error                       # Error
-#
-# Floppies use partition 0 of drive 0.
-# 
-main.4:        xor %dx,%dx                     # Partition:drive
-#
-# Ok, we have a slice and drive in %dx now, so use that to locate and load
-# boot2.  %si references the start of the slice we are looking for, so go
-# ahead and load up the first 16 sectors (boot1 + boot2) from that.  When
-# we read it in, we conveniently use 0x8c00 as our transfer buffer.  Thus,
-# boot1 ends up at 0x8c00, and boot2 starts at 0x8c00 + 0x200 = 0x8e00.
-# The first part of boot2 is the disklabel, which is 0x200 bytes long.
-# The second part is BTX, which is thus loaded into 0x9000, which is where
-# it also runs from.  The boot2.bin binary starts right after the end of
-# BTX, so we have to figure out where the start of it is and then move the
-# binary to 0xb000.  Normally, BTX clients start at MEM_USR, or 0xa000, but
-# when we use btxld create boot2, we use an entry point of 0x1000.  That
-# entry point is relative to MEM_USR; thus boot2.bin starts at 0xb000.
-# 
-main.5:                mov %dx,MEM_ARG                 # Save args
-               movb $0x2,%dh                   # Sector count
-               mov $0x7e00, %bx
-               callw nreadbx                   # Read disk
-               movb $0x40,%dh                  # Sector count
-               movb %dh, %al
-               callw puthex
-               mov $0x7e00, %bx
-               callw nreadbx                   # Read disk
-               push %si
-               mov $msg_r1,%si
-               callw putstr
-               pop %si
-               lcall $0x800,$0                 # enter the rom code
-               int $0x19
-
-msg_r1:                .asciz " done\r\n"
-               
-.if 0
-               mov $MEM_BTX,%bx                # BTX
-               mov 0xa(%bx),%si                # Get BTX length and set
-               add %bx,%si                     #  %si to start of boot2.bin
-               mov $MEM_USR+SIZ_PAG,%di        # Client page 1
-               mov $MEM_BTX+0xe*SIZ_SEC,%cx    # Byte
-               sub %si,%cx                     #  count
-               rep                             # Relocate
-               movsb                           #  client
-               sub %di,%cx                     # Byte count
-               xorb %al,%al                    # Zero assumed bss from
-               rep                             #  the end of boot2.bin
-               stosb                           #  up to 0x10000
-               callw seta20                    # Enable A20
-               jmp start+MEM_JMP-MEM_ORG       # Start BTX
-# 
-# Enable A20 so we can access memory above 1 meg.
-# 
-seta20:        cli                             # Disable interrupts
-seta20.1:      inb $0x64,%al                   # Get status
-               testb $0x2,%al                  # Busy?
-               jnz seta20.1                    # Yes
-               movb $0xd1,%al                  # Command: Write
-               outb %al,$0x64                  #  output port
-seta20.2:      inb $0x64,%al                   # Get status
-               testb $0x2,%al                  # Busy?
-               jnz seta20.2                    # Yes
-               movb $0xdf,%al                  # Enable
-               outb %al,$0x60                  #  A20
-               sti                             # Enable interrupts
-               retw                            # To caller
-.endif
-# 
-# Trampoline used to call read from within boot1.
-# 
-nread:         mov $MEM_BUF,%bx                # Transfer buffer
-nreadbx:                                       # same but address is in bx
-               mov 0x8(%si),%ax                # Get
-               mov 0xa(%si),%cx                #  LBA
-               push %bx
-               push %ax
-               callw putword
-               pop %ax
-               pop %bx
-               push %cs                        # Read from
-               callw xread.1                   #  disk
-               jnc return                      # If success, return
-               mov $msg_read,%si               # Otherwise, set the error
-                                               #  message and fall through to
-                                               #  the error routine
-# 
-# Print out the error message pointed to by %ds:(%si) followed
-# by a prompt, wait for a keypress, and then reboot the machine.
-# 
-error:         callw putstr                    # Display message
-               mov $prompt,%si                 # Display
-               callw putstr                    #  prompt
-               xorb %ah,%ah                    # BIOS: Get
-               int $0x16                       #  keypress
-               movw $0x1234, BDA_BOOT          # Do a warm boot
-               ljmp $0xffff,$0x0               # reboot the machine
-# 
-# Display a null-terminated string using the BIOS output.
-# 
-putstr.0:      call putchar
-putstr:        lodsb                           # Get char
-               testb %al,%al                   # End of string?
-               jne putstr.0                    # No
-               retw
-
-putword:       push %ax
-               movb $'.', %al
-               callw putchar
-               movb %ah, %al
-               callw puthex
-               pop %ax
-puthex:                push %ax
-               shr $4, %al
-               callw putdigit
-               pop %ax
-putdigit:
-               andb $0xf, %al
-               addb $0x30, %al
-               cmpb $0x39, %al
-               jbe putchar
-               addb $7, %al
-putchar:       push %ax
-               mov $0x7,%bx
-               movb $0xe,%ah
-               int $0x10
-               pop %ax
-               retw
-
-#
-# Overused return code.  ereturn is used to return an error from the
-# read function.  Since we assume putstr succeeds, we (ab)use the
-# same code when we return from putstr. 
-# 
-ereturn:       movb $0x1,%ah                   # Invalid
-               stc                             #  argument
-return:        retw                            # To caller
-# 
-# Reads sectors from the disk.  If EDD is enabled, then check if it is
-# installed and use it if it is.  If it is not installed or not enabled, then
-# fall back to using CHS.  Since we use a LBA, if we are using CHS, we have to
-# fetch the drive parameters from the BIOS and divide it out ourselves.
-# Call with:
-#
-# %dl  - byte     - drive number
-# stack - 10 bytes - EDD Packet
-#
-read:          push %dx                        # Save
-               movb $0x8,%ah                   # BIOS: Get drive
-               int $0x13                       #  parameters
-               movb %dh,%ch                    # Max head number
-               pop %dx                         # Restore
-               jc return                       # If error
-               andb $0x3f,%cl                  # Sectors per track
-               jz ereturn                      # If zero
-               cli                             # Disable interrupts
-               mov 0x8(%bp),%eax               # Get LBA
-               push %dx                        # Save
-               movzbl %cl,%ebx                 # Divide by
-               xor %edx,%edx                   #  sectors
-               div %ebx                        #  per track
-               movb %ch,%bl                    # Max head number
-               movb %dl,%ch                    # Sector number
-               inc %bx                         # Divide by
-               xorb %dl,%dl                    #  number
-               div %ebx                        #  of heads
-               movb %dl,%bh                    # Head number
-               pop %dx                         # Restore
-               cmpl $0x3ff,%eax                # Cylinder number supportable?
-               sti                             # Enable interrupts
-               ja read.7                       # No, try EDD
-               xchgb %al,%ah                   # Set up cylinder
-               rorb $0x2,%al                   #  number
-               orb %ch,%al                     # Merge
-               inc %ax                         #  sector
-               xchg %ax,%cx                    #  number
-               movb %bh,%dh                    # Head number
-               subb %ah,%al                    # Sectors this track
-               mov 0x2(%bp),%ah                # Blocks to read
-               cmpb %ah,%al                    # To read
-               jb read.2                       #  this
-               movb %ah,%al                    #  track
-read.2:        mov $0x5,%di                    # Try count
-read.3:        les 0x4(%bp),%bx                # Transfer buffer
-               push %ax                        # Save
-               movb $0x2,%ah                   # BIOS: Read
-               int $0x13                       #  from disk
-               pop %bx                         # Restore
-               jnc read.4                      # If success
-               dec %di                         # Retry?
-               jz read.6                       # No
-               xorb %ah,%ah                    # BIOS: Reset
-               int $0x13                       #  disk system
-               xchg %bx,%ax                    # Block count
-               jmp read.3                      # Continue
-read.4:        movzbw %bl,%ax                  # Sectors read
-               add %ax,0x8(%bp)                # Adjust
-               jnc read.5                      #  LBA,
-               incw 0xa(%bp)                   #  transfer
-read.5:        shlb %bl                        #  buffer
-               add %bl,0x5(%bp)                #  pointer,
-               sub %al,0x2(%bp)                #  block count
-               ja read                         # If not done
-read.6:        retw                            # To caller
-read.7:                testb $FL_PACKET,%cs:MEM_REL+flags-start # LBA support enabled?
-               jz ereturn                      # No, so return an error
-               mov $0x55aa,%bx                 # Magic
-               push %dx                        # Save
-               movb $0x41,%ah                  # BIOS: Check
-               int $0x13                       #  extensions present
-               pop %dx                         # Restore
-               jc return                       # If error, return an error
-               cmp $0xaa55,%bx                 # Magic?
-               jne ereturn                     # No, so return an error
-               testb $0x1,%cl                  # Packet interface?
-               jz ereturn                      # No, so return an error
-               mov %bp,%si                     # Disk packet
-               movb $0x42,%ah                  # BIOS: Extended
-               int $0x13                       #  read
-               retw                            # To caller
-
-# Messages
-
-msg_read:      .asciz "Rd"
-msg_part:      .asciz "Boot"
-
-prompt:        .asciz " err\r\n"
-
-flags:         .byte FLAGS                     # Flags
-
-               .org PRT_OFF,0x90
-
-# Partition table
-
-               .fill 0x30,0x1,0x0
-part4:         .byte 0x80
-               .byte 0x00      # start head
-               .byte 0x01      # start sector (6 bits) + start cyl (2 bit)
-               .byte 0x00      # start cyl (low 8 bits)
-               .byte 0x1       # part.type
-               .byte 0xff      # end head
-               .byte 0xff      # end sect (6) + end_cyl(2)
-               .byte 0xff      # end cyl
-               .byte 0x00, 0x00, 0x00, 0x00    # explicit start
-               .byte 0x50, 0xc3, 0x00, 0x00    # 50000 sectors long, bleh
-
-               .word 0xaa55                    # Magic number