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| author | Matt Fleming <matt.fleming@intel.com> | 2011-10-18 13:13:06 +0100 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2011-12-01 13:14:05 +0000 |
| commit | 9f51b69d7c0500e04b3c404bb5138a9234810035 (patch) | |
| tree | d566e6984457f331288f34d780f15a680334af94 /core/init.inc | |
| parent | dd5e4935f3e2f8f1940c72d9c3b39a926300c42e (diff) | |
| download | syslinux-9f51b69d7c0500e04b3c404bb5138a9234810035.tar.gz | |
core: Reimplement lots asm code in C
There is an awful lot of code currently implemented in assembly when
it could just as easily be implemented in C. Having it in C makes it
much easier to share code between the BIOS and forthcoming EFI
firmware backend. The following code fragments have been rewritten,
- timer initialisation
- adjust_screen()
- check_esapes() and mem_init()
- conio.inc
- plaincon.inc
- cleanup.inc
- serirq.inc
- font.inc
- graphics
- writehex
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'core/init.inc')
| -rw-r--r-- | core/init.inc | 60 |
1 files changed, 3 insertions, 57 deletions
diff --git a/core/init.inc b/core/init.inc index cce4327c..83d6fd68 100644 --- a/core/init.inc +++ b/core/init.inc @@ -28,11 +28,8 @@ common_init: cmp eax,__pm_code_len jne kaboom -; -; Initialize timer -; - call timer_init - + extern init + pm_call init ; ; Initialize configuration information ; @@ -44,63 +41,12 @@ common_init: call comboot_setup_api ; -; Now set up screen parameters -; - call adjust_screen - pm_call printf_init - -; ; Inite the memmory subsystem ; - pm_call mem_init +; pm_call mem_init mov eax,[HighMemSize] mov [VKernelEnd],eax -; -; CPU-dependent initialization and related checks. -; -check_escapes: - mov ah,02h ; Check keyboard flags - int 16h - mov [KbdFlags],al ; Save for boot prompt check - test al,04h ; Ctrl->skip 386 check - jnz skip_checks - -; -; Now check that there is sufficient low (DOS) memory -; -; NOTE: Linux doesn't use all of real_mode_seg, but we use the same -; segment for COMBOOT images, which can use all 64K -; - int 12h - mov edx,__lowmem_heap + min_lowmem_heap + 1023 - shr edx,10 - cmp ax,dx - jae enough_ram - mov ax,dx - mov si,err_noram - mov cl,10 - div cl - add [si+err_noram.size-err_noram+2],ah - cbw - div cl - add [si+err_noram.size-err_noram],ax - call writestr_early - jmp kaboom -enough_ram: -skip_checks: - - section .data16 -err_noram db 'It appears your computer has less than ' -.size db '000' - db 'K of low ("DOS")' - db CR, LF - db 'RAM. Syslinux needs at least this amount to boot. If you get' - db CR, LF - db 'this message in error, hold down the Ctrl key while' - db CR, LF - db 'booting, and I will take your word for it.', CR, LF, 0 - section .text16 ; ; The code to decompress the PM code and initialize other segments. |