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Bootloader add temporary initial command line 

This will probably be read from some config file at some point
This commit is contained in:
Bananymous 2023-11-17 20:38:38 +02:00
parent cb5a5d3ed1
commit ef53aab24a
1 changed files with 12 additions and 4 deletions
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16
bootloader/command_line.S
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@ -6,10 +6,20 @@
# NO REGISTERS SAVED
.global read_user_command_line
read_user_command_line:
# print initial command line
movw $command_line_enter_msg, %si
call puts
movw $command_line_buffer, %si
call puts
# prepare registers for input
movw $command_line_enter_msg, %si
movw $command_line_buffer, %di
.read_user_command_line_goto_end:
cmpb $0, (%di)
jz .read_user_command_line_loop
incw %di
jmp .read_user_command_line_goto_end
.read_user_command_line_loop:
call getc
@ -65,11 +75,9 @@ read_user_command_line:
command_line_enter_msg:
.asciz "cmdline: "
.section .bss
.global command_line
command_line:
# 100 character command line
command_line_buffer:
.skip 100
.ascii "root=/dev/sda2 console=ttyS0"
.skip 100 - 28