X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/37e45c7c11b6af276ba23505bbdbf218ff915ed8..33e49b2e6d599bc56326841b5b373b9f76adc5f7:/aseg/aseg.asm diff --git a/aseg/aseg.asm b/aseg/aseg.asm deleted file mode 100644 index ee83272..0000000 --- a/aseg/aseg.asm +++ /dev/null @@ -1,126 +0,0 @@ - org 0xA8000 -[bits 16] -entry: - mov ax, 0xA800 - mov ds, ax ; Take us out of flat unreal mode, and - mov es, ax ; put us in true real mode. - mov fs, ax - mov gs, ax - mov ss, ax - jmp 0xA800:(entry2-0xA8000) ; Long jump to a correct cs. -entry2: - lgdt [(gdtr-0xA8000)] ; Set up a new GDT. - mov eax, 0x1 - mov cr0, eax ; ... and enter pmode! - jmp long 0x10:continue ; Now longjmp into the new code. -[bits 32] -continue: - mov ax, 0x08 ; Set up segment selectors. - mov ds, ax - mov es, ax - mov fs, ax - mov gs, ax - mov ss, ax - mov esp, [dataptr] - -; mov al, [cstat] -; add al, 1 -; out 0x80, al -; mov [cstat], al - - mov dx, 0xCF8 ; save off the old config value - in dword eax, dx - mov [esp-4], eax - - mov eax, 0x80000070 ; load in smramc - out dx, eax - mov dx, 0xCFC - in byte al, dx - mov [esp-5], al - and al, 0xF3 ; Allow graphics access - or al, 0x08 - out dx, al - - xor eax, eax - mov dx, 0x3D4 - in byte al, dx - mov [esp-6], al ; save off the old VGA command - mov al, 0xC - out dx, al - inc dx - in al, dx - mov ah, al - dec dx - mov al, 0xD - out dx, al - inc dx - in al, dx - shl eax, 1 - add eax, 0xB8000 ; yay - mov byte [eax+0], '1' - mov byte [eax+1], 0x1F - mov byte [eax+2], '5' - mov byte [eax+3], 0x1F - mov byte [eax+4], '-' - mov byte [eax+5], 0x1F - mov byte [eax+6], '4' - mov byte [eax+7], 0x1F - mov byte [eax+8], '1' - mov byte [eax+9], 0x1F - mov byte [eax+10], '2' - mov byte [eax+11], 0x1F - - mov dx, 0x3D4 ; restore the old stuff - mov al, [esp-6] - out dx, al - - mov al, 0 - mov edi, [dataptr+4] ; clear BSS - mov ecx, [dataptr+8] - rep stosb - - mov dx, 0xCFC ; restore smramc - mov al, [esp-5] - out dx, al - - mov eax, [dataptr+12] - call eax - - mov dx, 0xCF8 ; restore the old config value - mov eax, [esp-4] - out dx, eax - - mov al, 0x40 ; ack the periodic IRQ - mov dx, 0x834 - out dx, al - - mov dx, 0x830 - in al, dx - or al, 0x02 ; now ack the SMI itself - and al, 0xBF - out dx, al - or al, 0x40 - out dx, al - - rsm ; and leave SMM - - align 0x4 -gdtr: - db 0x27, 0x00 - dd gdt - align 0x4 -gdt: - db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 - db 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x93, 0xCF, 0x00 ; data segment - db 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x9B, 0xCF, 0x00 ; code segment - db 0xFF, 0xFF, 0x00, 0x80, 0x0A, 0x9B, 0xCF, 0x00 ; code segment for trampoline - -cstat: - db 0x00 - -TIMES 512-($-$$) DB 0 -dataptr: - ; 4 bytes of stack top - ; 4 bytes of BSS start - ; 4 bytes of BSS length - ; 4 bytes of C entry point \ No newline at end of file