[syslinux] syslinux timeout
Diego Torres Milano
diego at in3.com.ar
Mon Feb 25 19:37:22 PST 2002
Hi.
I've ever wondered how nuch timeis left to timeout while waiting at the
boot prompt, so I've writen this small patch to show it.
This add a configuration command 'showtimeout'.
If you like the patch I could improve it (for example to show the
timeout in decimal because now it uses the writehex functions)
Regards.
--
______ ________
/ / \/ /___ ) I N T E G R A C I O N
/ / /___ / I N F O R M A T I C A
/__/__/\___/_____'
Diego Torres Milano Maipu 42 Office 164 - (C1084ABB) Buenos Aires Argentina
diego at in3.com.ar Tel: +5411 4331-2233 Fax +5411 4331-3377 www.in3.com.ar
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Binary files ../syslinux-1.67/bootsect.bin and ./bootsect.bin differ
Only in ../syslinux-1.67: copybs.com
Only in ../syslinux-1.67: gethostip
diff -ru -U10 ../syslinux-1.67/ldlinux.asm ./ldlinux.asm
--- ../syslinux-1.67/ldlinux.asm Sun Feb 3 18:37:55 2002
+++ ./ldlinux.asm Mon Feb 25 15:43:27 2002
@@ -38,20 +38,23 @@
;
; Should be updated with every release to avoid bootsector/SYS file mismatch
;
%define version_str VERSION ; Must be 4 characters long!
%define date DATE_STR ; Defined from the Makefile
%define year '2001'
;
; Debgging stuff
;
; %define debug 1 ; Uncomment to enable debugging
+; DTM BEGIN ------------------------------------------------
+%define writehex 1 ; writehex
+; DTM END --------------------------------------------------
;
; ID for SYSLINUX (reported to kernel)
;
syslinux_id equ 031h ; SYSLINUX (3) version 1.x (1)
;
; Segments used by Linux
;
; Note: the real_mode_seg is supposed to be 9000h, but some device drivers
; hog some of high memory. Therefore, we load it at 7000:0000h and copy
; it before starting the Linux kernel.
@@ -1198,20 +1201,24 @@
jz near no_config_file
parse_config:
call getkeyword
jc near end_config_file ; Config file loaded
cmp ax,'de' ; DEfault
je pc_default
cmp ax,'ap' ; APpend
je pc_append
cmp ax,'ti' ; TImeout
je near pc_timeout
+ ; DTM BEGIN ------------------------------------------------
+ cmp ax,'sh' ; Show timeout
+ je near pc_showtimeout
+ ; DTM END --------------------------------------------------
cmp ax,'pr' ; PRompt
je near pc_prompt
cmp ax,'fo' ; FOnt
je near pc_font
cmp ax,'kb' ; KBd
je near pc_kbd
cmp ax,'di' ; DIsplay
je near pc_display
cmp ax,'la' ; LAbel
je near pc_label
@@ -1260,20 +1267,27 @@
jmp short parse_config_2
pc_timeout: call getint ; "timeout" command
jc parse_config_2
mov ax,0D215h ; There are approx 1.D215h
mul bx ; clock ticks per 1/10 s
add bx,dx
mov [KbdTimeOut],bx
jmp short parse_config_2
+; DTM BEGIN ------------------------------------------------
+pc_showtimeout: call getint ; "showtimeout" command
+ jc parse_config_2
+ mov [ShowTimeOut],bx
+ jmp short parse_config_2
+; DTM END --------------------------------------------------
+
pc_display: call pc_getfile ; "display" command
jz parse_config_2 ; File not found?
call get_msg_file ; Load and display file
parse_config_2: jmp parse_config
pc_prompt: call getint ; "prompt" command
jc parse_config_2
mov [ForcePrompt],bx
jmp short parse_config_2
@@ -1454,22 +1468,25 @@
;
; Check whether or not we are supposed to display the boot prompt.
;
check_for_key:
cmp word [ForcePrompt],byte 0 ; Force prompt?
jnz enter_command
test byte [KbdFlags],5Bh ; Caps, Scroll, Shift, Alt
jz near auto_boot ; If neither, default boot
enter_command:
- mov si,boot_prompt
- call cwritestr
+ ; DTM BEGIN ------------------------------------------------
+ ;;mov si,boot_prompt
+ ;;call cwritestr
+ call writeprompt
+ ; DTM END --------------------------------------------------
mov byte [FuncFlag],0 ; <Ctrl-F> not pressed
mov di,command_line
;
; get the very first character -- we can either time
; out, or receive a character press at this time. Some dorky BIOSes stuff
; a return in the buffer on bootup, so wipe the keyboard buffer first.
;
clear_buffer: mov ah,1 ; Check for pending char
int 16h
@@ -1479,30 +1496,67 @@
jmp short clear_buffer
get_char_time:
call vgashowcursor
mov cx,[KbdTimeOut]
and cx,cx
jz get_char ; Timeout == 0 -> no timeout
inc cx ; The first loop will happen
; immediately as we don't
; know the appropriate DX value
time_loop: push cx
+ ; DTM BEGIN ------------------------------------------------
+ push cx
+ ; DTM END --------------------------------------------------
tick_loop: push dx
call pollchar
jnz get_char_pop
xor ax,ax
int 1Ah ; Get time "of day"
pop ax
cmp dx,ax ; Has the timer advanced?
je tick_loop
+
+ ; DTM BEGIN -------------------------------------------------
+ cmp [ShowTimeOut], word 0
+ jne .showtimeout
+ pop ax ; extract saved cx
+ jmp .showtimeoutend
+.showtimeout:
+ pop ax
+ mov cx,ax ; save current loop value in cx
+ mov bl,10 ; 1/10 sec
+ div bl
+ and ah,ah ; reminder
+ jnz .showtimeoutend
+
+ mov si, boot_timeout_prompt_pos
+ call cwritestr
+
+ mov ax,cx ; move loop value into ax
+ call writehex4
+
+ mov si, boot_timeout_prompt_end
+ call cwritestr
+.showtimeoutend:
+ ; DTM END --------------------------------------------------
+
pop cx
loop time_loop ; If so, decrement counter
+
+ ; DTM BEGIN -------------------------------------------------
+ ; Fix prompt
+ mov si, boot_timeout_prompt_pos
+ call cwritestr
+ mov si, boot_timeout_prompt_begin
+ call cwritestr
+ ; DTM END --------------------------------------------------
+
call vgahidecursor
jmp command_done ; Timeout!
get_char_pop: pop eax ; Clear stack
get_char:
call vgashowcursor
call getchar
call vgahidecursor
and al,al
jz func_key
@@ -1570,22 +1624,26 @@
call searchdir
jz fk_nofile
push si
call crlf
pop si
call get_msg_file
jmp short fk_wrcmd
fk_nofile:
call crlf
fk_wrcmd:
- mov si,boot_prompt
- call cwritestr
+ ; DTM BEGIN ------------------------------------------------
+ ;;mov si,boot_prompt
+ ;;call cwritestr
+ call writeprompt
+ ; DTM END --------------------------------------------------
+
pop di ; Command line write pointer
push di
mov byte [di],0 ; Null-terminate command line
mov si,command_line
call cwritestr ; Write command line so far
pop di
jmp short get_char_2
auto_boot:
mov si,default_cmd
mov di,command_line
@@ -3377,21 +3435,24 @@
pushad
.top: lodsb
and al,al
jz .end
call writechr
jmp short .top
.end: popad
popfd
ret
-%ifdef debug
+; BEGIN DTM ------------------------------------------------
+;%ifdef debug
+%ifdef debug or writehex
+; END DTM --------------------------------------------------
;
; writehex[248]: Write a hex number in (AL, AX, EAX) to the console
;
writehex2:
pushfd
pushad
rol eax,24
mov cx,2
jmp short writehex_common
@@ -3414,33 +3475,38 @@
.low: add al,'0'
jmp short .ischar
.high: add al,'A'-10
.ischar: call writechr
pop eax
loop .loop
popad
popfd
ret
+%if 0
;
; crlf: write CR LF
;
+; DTM: Redefined if debug enabled
+;
crlf: push ax
mov al, 13
call writechr
mov al, 10
call writechr
pop ax
ret
%endif
+%endif
+
;
; pollchar: check if we have an input character pending (ZF = 0)
;
pollchar:
pushad
mov ah,1 ; Poll keyboard
int 16h
jnz .done ; Keyboard response
mov dx,[SerialPort]
and dx,dx
@@ -4225,20 +4291,35 @@
cmp [UsingVGA], byte 1
jne .done
mov ah,09h
mov bx,0007h
mov cx,1
int 10h
.done:
popad
ret
+; DTM BEGIN ------------------------------------------------
+; writeprompt
+writeprompt:
+ cmp [ShowTimeOut], word 0
+ jne .timeoutprompt
+ mov si, boot_prompt
+ call cwritestr
+ jmp .done
+.timeoutprompt
+ mov si, boot_timeout_prompt
+ call cwritestr
+.done
+ ret
+; DTM END --------------------------------------------------
+
; Map colors to consecutive DAC registers
linear_color db 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0
UsingVGA db 0
; ----------------------------------------------------------------------------------
; Begin data section
; ----------------------------------------------------------------------------------
CR equ 13 ; Carriage Return
@@ -4252,20 +4333,26 @@
lcase_low equ 128
lcase_high equ 165
lcase_tab db 135, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138
db 139, 140, 141, 132, 134, 130, 145, 145, 147, 148, 149
db 150, 151, 152, 148, 129, 155, 156, 155, 158, 159, 160
db 161, 162, 163, 164, 164
copyright_str db ' Copyright (C) 1994-', year, ' H. Peter Anvin'
db CR, LF, 0
boot_prompt db 'boot: ', 0
+; DTM BEGIN ------------------------------------------------
+boot_timeout_prompt db 'boot ('
+boot_timeout_prompt_begin db '0000'
+boot_timeout_prompt_end db '): ', 0
+boot_timeout_prompt_pos db BS, BS, BS, BS, BS, BS, BS, 0
+; DTM END --------------------------------------------------
wipe_char db BS, ' ', BS, 0
err_notfound db 'Could not find kernel image: ',0
err_notkernel db CR, LF, 'Invalid or corrupt kernel image.', CR, LF, 0
err_not386 db 'It appears your computer uses a 286 or lower CPU.'
db CR, LF
db 'You cannot run Linux unless you have a 386 or higher CPU'
db CR, LF
db 'in your machine. If you get this message in error, hold'
db CR, LF
db 'down the Ctrl key while booting, and I will take your'
@@ -4305,20 +4392,23 @@
; mem= and vga= are handled as normal 32-bit integer values
initrd_cmd db 'initrd='
initrd_cmd_len equ 7
;
; Config file keyword table
;
align 2
keywd_table db 'ap' ; append
db 'de' ; default
db 'ti' ; timeout
+ ; DTM BEGIN ------------------------------------------------
+ db 'sh' ; showtimeout
+ ; DTM END --------------------------------------------------
db 'fo' ; font
db 'kb' ; kbd
db 'di' ; display
db 'pr' ; prompt
db 'la' ; label
db 'im' ; implicit
db 'ke' ; kernel
db 'se' ; serial
db 'f1' ; F1
db 'f2' ; F2
@@ -4346,20 +4436,23 @@
exten_count equ (($-exten_table) >> 2) - 1 ; Number of alternates
;
; Misc initialized (data) variables
;
%ifdef debug ; This code for debugging only
debug_magic dw 0D00Dh ; Debug code sentinel
%endif
AppendLen dw 0 ; Bytes in append= command
KbdTimeOut dw 0 ; Keyboard timeout (if any)
+; DTM BEGIN ------------------------------------------------
+ShowTimeOut dw 0 ; Show timeout
+; DTM END --------------------------------------------------
FKeyMap dw 0 ; Bitmap for F-keys loaded
CmdLinePtr dw cmd_line_here ; Command line advancing pointer
initrd_flag equ $
initrd_ptr dw 0 ; Initial ramdisk pointer/flag
VKernelCtr dw 0 ; Number of registered vkernels
ForcePrompt dw 0 ; Force prompt
AllowImplicit dw 1 ; Allow implicit kernels
SerialPort dw 0 ; Serial port base (or 0 for no serial port)
A20List dw a20_dunno, a20_none, a20_bios, a20_kbc, a20_fast
A20DList dw a20d_dunno, a20d_none, a20d_bios, a20d_kbc, a20d_fast
Binary files ../syslinux-1.67/ldlinux.bin and ./ldlinux.bin differ
Only in ../syslinux-1.67: ldlinux.lst
Binary files ../syslinux-1.67/ldlinux.sys and ./ldlinux.sys differ
Only in ../syslinux-1.67: mbr.lst
Only in ../syslinux-1.67/memdisk: memdisk
Only in ../syslinux-1.67/sample: syslogo.lss
Only in ../syslinux-1.67: syslinux
Only in ../syslinux-1.67: syslinux.com
diff -ru -U10 ../syslinux-1.67/syslinux.doc ./syslinux.doc
--- ../syslinux-1.67/syslinux.doc Sun Feb 3 18:37:55 2002
+++ ./syslinux.doc Mon Feb 25 16:09:55 2002
@@ -194,20 +194,26 @@
Indicates how long to wait at the boot: prompt until booting
automatically, in units of 1/10 s. The timeout is cancelled as
soon as the user types anything on the keyboard, the assumption
being that the user will complete the command line already
begun. A timeout of zero will disable the timeout completely,
this is also the default.
NOTE: The maximum possible timeout value is 35996; corresponding to
just below one hour.
+DTM BEGIN ------------------------------------------------------------
+SHOWTIMEOUT flag_val
+ If flag_val is not equal to 0, show the four hex digits timer
+ value to timeout.
+DTM END --------------------------------------------------------------
+
SERIAL port [[baudrate] flowcontrol]
Enables a serial port to act as the console. "port" is a
number (0 = /dev/ttyS0 = COM1, etc.) or an I/O port address
(e.g. 0x3F8); if "baudrate" is omitted, the baud rate defaults
to 9600 bps. The serial parameters are hardcoded to be 8
bits, no parity, 1 stop bit.
"flowcontrol" is a combination of the following bits:
0x001 - Assert DTR
0x002 - Assert RTS
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