| Current Path : /usr/src/sys/boot/pc98/boot0.5/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sys/boot/pc98/boot0.5/selector.s |
# Copyright (c) KATO Takenori, 1999, 2000, 2007. # # All rights reserved. Unpublished rights reserved under the copyright # laws of Japan. # # 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 as # the first lines of this file unmodified. # 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. # # 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. # # $FreeBSD: release/9.1.0/sys/boot/pc98/boot0.5/selector.s 201399 2010-01-02 17:32:40Z mbr $ # .code16 .text # # Display partition table. # showpartitions: # Clear partition table area movw $16, %cx clear_part: push %cx movw %cx, %dx decw %dx addw $5, %dx movw $20, %cx call sc_goto movw $msg_spc, %di call sc_puts pop %cx loop clear_part # Check `Exit' menu movw curdevice, %ax cmpw ndevice, %ax je no_slice # XXX Move this to a suitable place! movw $22, %cx movw $4, %dx call sc_goto movw $msg_slice, %di call sc_puts # Check the number of partitions movw npartition, %cx orw %cx, %cx jnz partitionexist no_slice: # Just show the `no slice' message. movw $22, %cx movw $5, %dx call sc_goto movw $msg_noslice, %di call sc_puts ret partitionexist: xorw %si, %si # %si = partition number showpart_loop: push %cx # %cx = number of partitions movw $22, %cx movw %si, %dx addw $5, %dx call sc_goto movw %si, %di movb $5, %cl shlw %cl, %di addw $0x10, %di # SYSM field # SYSM: space filled string. Don't use sc_puts. movw $16, %cx showpart_name: push %cx movb parttable(%di), %al call sc_putc incw %di pop %cx loop showpart_name incw %si pop %cx loop showpart_loop ret # # Show default slice indicator # If the default boot slice exists, `*' indicator will be showed. # showdefaultslicemark: cmpb $0x80, defpartflag je defpartexist ret defpartexist: movw npartition, %cx defslice_loop: movw %cx, %bx decw %bx push %cx push %bx movw $40, %cx movw %bx, %dx addw $5, %dx call sc_goto pop %bx pop %cx movb defpartnum, %al cmpb partnum(%bx), %al jne nomatch movb $'*', %al call sc_putc jmp defslice_done nomatch: movb $' ', %al call sc_putc defslice_done: loop defslice_loop ret # # Hide default slice indicator # hidedefaultslicemark: movw $16, %cx hidedefslice_loop: push %cx movw %cx, %dx addw $4, %dx movw $40, %cx call sc_goto movb $' ', %al call sc_putc pop %cx loop hidedefslice_loop ret # # Toggle default slice # toggle_default: cmpb $0x80, defpartflag jne set_default # Clear default movb $0, defpartflag call write_ipl # Restore call hidedefaultslicemark ret # Set default slice set_default: movw curpartition, %si movb partnum(%si), %al # %al = real partition number movb $5, %cl shlw %cl, %si # Default slice must be bootable testb $0x80, parttable(%si) jnz curpart_bootable # Current partition is not bootable. ret curpart_bootable: movb $0x80, defpartflag movb %al, defpartnum call write_ipl # Restore call showdefaultslicemark ret # # Show/hide cursor # show_devcurs: xorw %cx, %cx movw curdevice, %dx addw $5, %dx call sc_goto movb $'>', %al call sc_putc movb $'>', %al call sc_putc ret hide_devcurs: xorw %cx, %cx movw curdevice, %dx addw $5, %dx call sc_goto movb $' ', %al call sc_putc movb $' ', %al call sc_putc ret show_slicecurs: movw $20, %cx movw curpartition, %dx addw $5, %dx call sc_goto movb $'>', %al call sc_putc movb $'>', %al call sc_putc ret hide_slicecurs: movw $20, %cx movw curpartition, %dx addw $5, %dx call sc_goto movb $' ', %al call sc_putc movb $' ', %al call sc_putc ret isforceboot: xorw %cx, %cx movw $20, %dx call sc_goto movw $msg_force, %di call sc_puts call sc_getc push %ax xorw %cx, %cx movw $20, %dx call sc_goto movw $msg_forceclr, %di call sc_puts pop %ax cmpb $0x15, %ah je force_yes xorw %ax, %ax ret force_yes: movw $1, %ax ret # # Main loop for device mode # devmode: call read_ipl call hidedefaultslicemark call showpartitions call showdefaultslicemark call show_devcurs movw $2, %cx movw $4, %dx call sc_goto movb $0xe5, %al movw $6, %cx call sc_setattr movw $22, %cx movw $4, %dx call sc_goto movb $0xe1, %al movw $5, %cx call sc_setattr movw $44, %cx movw $3, %dx call sc_goto movb $0xe5, %al movw $11, %cx call sc_setattr movw $44, %cx movw $7, %dx call sc_goto movb $0xe1, %al movw $10, %cx call sc_setattr devmode_loop: call sc_getc movw ndevice, %bx cmpb $0x3a, %ah # UP je dev_up cmpb $0x3d, %ah # DOWN je dev_down cmpb $0x3c, %ah # RIGHT je dev_right cmpb $0x1c, %ah # RETURN jne devmode_loop cmpw curdevice, %bx jne dev_right movw $3, mode # N88-BASIC ret # XXX .space 5, 0x90 ret # Dummy ret @0x9ab dev_up: cmpw $0, curdevice je devmode_loop call hide_devcurs decw curdevice call read_ipl call hidedefaultslicemark call showpartitions call showdefaultslicemark call show_devcurs jmp devmode_loop dev_down: cmpw curdevice, %bx je devmode_loop call hide_devcurs incw curdevice call read_ipl call hidedefaultslicemark call showpartitions call showdefaultslicemark call show_devcurs jmp devmode_loop dev_right: cmpw curdevice, %bx je devmode_loop movw $1, mode # Slice mode ret # # main loop for slice mode # slicemode: movw $0, curpartition call show_slicecurs movw $2, %cx movw $4, %dx call sc_goto movb $0xe1, %al movw $6, %cx call sc_setattr movw $22, %cx movw $4, %dx call sc_goto movb $0xe5, %al movw $5, %cx call sc_setattr movw $44, %cx movw $3, %dx call sc_goto movb $0xe1, %al movw $11, %cx call sc_setattr movw $44, %cx movw $7, %dx call sc_goto movb $0xe5, %al movw $10, %cx call sc_setattr slicemode_loop: call sc_getc cmpb $0x3a, %ah # UP je slice_up cmpb $0x3d, %ah # DOWN je slice_down cmpb $0x3b, %ah # LEFT je slice_esc cmpb $0x00, %ah # ESC je slice_esc cmpb $0x1c, %ah # RETURN je slice_ret cmpb $0x34, %ah # SPC je slice_spc cmpb $0x62, %ah # f1 je slice_spc jmp slicemode_loop slice_up: cmpw $0, curpartition je slicemode_loop call hide_slicecurs decw curpartition call show_slicecurs jmp slicemode_loop slice_down: movw curpartition, %bx movw npartition, %ax decw %ax cmpw %bx, %ax je slicemode_loop call hide_slicecurs incw curpartition call show_slicecurs jmp slicemode_loop slice_esc: movw $0, mode # Device mode ret slice_spc: call toggle_default jmp slicemode_loop slice_ret: # Test bit 7 of mid movw curpartition, %si movb $5, %cl shlw %cl, %si testb $0x80, parttable(%si) jnz bootable_slice call isforceboot orw %ax, %ax jz slicemode_loop bootable_slice: call boot jmp slicemode_loop # # Main loop # .global selector selector: movw $0, curdevice # trydefault may change the curdevice. movw $0, mode selector_loop: cmpw $0, mode je status_dev cmpw $1, mode je status_slice ret status_dev: call devmode jmp selector_loop status_slice: call slicemode jmp selector_loop .data .global curpartition curpartition: .word 0 # current patition mode: .word 0 msg_spc: .asciz " " msg_slice: .asciz "Slice" msg_noslice: .asciz "no slice" msg_force: .asciz "This slice is not bootable. Continue? (Y / [N])" msg_forceclr: .asciz " "