mkinitrd-magellan/isolinux/idle.inc

;; -*- fundamental -*- ---------------------------------------------------
;;
;;   Copyright 2008 H. Peter Anvin - All Rights Reserved
;;   Copyright 2009 Intel Corporation; author: H. Peter Anvin
;;
;;   This program is free software; you can redistribute it and/or modify
;;   it under the terms of the GNU General Public License as published by
;;   the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
;;   Boston MA 02110-1301, USA; either version 2 of the License, or
;;   (at your option) any later version; incorporated herein by reference.
;;
;; -----------------------------------------------------------------------

		section .text
TICKS_TO_IDLE	equ 4

reset_idle:
		push ax
		mov ax,[cs:BIOS_timer]
		mov [cs:IdleTimer],ax
		pop ax
		sti		; Guard against BIOS/PXE brokenness...
		ret

do_idle:
		push ax
		push ds
		push es
		mov ax,cs
		mov ds,ax
		mov es,ax
		pushf
		pop ax
		test ah,2
		jnz .ok
		push si
		push cx
		mov si,hlt_err
		call writestr
		mov si,sp
		add si,10
		mov cx,16
.errloop:
		ss lodsw
		call writehex4
		dec cx
		jz .endloop
		mov al,' '
		call writechr
		jmp .errloop
.endloop:
		call crlf
		pop cx
		pop si
		sti
.ok:
		mov ax,[BIOS_timer]
		sub ax,[IdleTimer]
		cmp ax,TICKS_TO_IDLE
		jb .done
		call [IdleHook]
		cmp dword [NoHalt],0
		jne .done
		hlt
.done:
		pop es
		pop ds
		pop ax
.ret:		ret

		section .data
		alignb 4
NoHalt		dw 0			; NoHalt set by user
ForceNoHalt	dw 0			; NoHalt forced by hardware config
IdleHook	dw do_idle.ret

hlt_err		db 'ERROR: idle with IF=0', CR, LF, 0 

		section .bss
IdleTimer	resw 1
1	niro	1133	;; -- fundamental -- ---------------------------------------------------
2			;;
3			;; Copyright 2008 H. Peter Anvin - All Rights Reserved
4			;; Copyright 2009 Intel Corporation; author: H. Peter Anvin
5			;;
6			;; This program is free software; you can redistribute it and/or modify
7			;; it under the terms of the GNU General Public License as published by
8			;; the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
9			;; Boston MA 02110-1301, USA; either version 2 of the License, or
10			;; (at your option) any later version; incorporated herein by reference.
11			;;
12			;; -----------------------------------------------------------------------
13
14			section .text
15			TICKS_TO_IDLE equ 4
16
17			reset_idle:
18			push ax
19			mov ax,[cs:BIOS_timer]
20			mov [cs:IdleTimer],ax
21			pop ax
22			sti ; Guard against BIOS/PXE brokenness...
23			ret
24
25			do_idle:
26			push ax
27			push ds
28			push es
29			mov ax,cs
30			mov ds,ax
31			mov es,ax
32			pushf
33			pop ax
34			test ah,2
35			jnz .ok
36			push si
37			push cx
38			mov si,hlt_err
39			call writestr
40			mov si,sp
41			add si,10
42			mov cx,16
43			.errloop:
44			ss lodsw
45			call writehex4
46			dec cx
47			jz .endloop
48			mov al,' '
49			call writechr
50			jmp .errloop
51			.endloop:
52			call crlf
53			pop cx
54			pop si
55			sti
56			.ok:
57			mov ax,[BIOS_timer]
58			sub ax,[IdleTimer]
59			cmp ax,TICKS_TO_IDLE
60			jb .done
61			call [IdleHook]
62			cmp dword [NoHalt],0
63			jne .done
64			hlt
65			.done:
66			pop es
67			pop ds
68			pop ax
69			.ret: ret
70
71			section .data
72			alignb 4
73			NoHalt dw 0 ; NoHalt set by user
74			ForceNoHalt dw 0 ; NoHalt forced by hardware config
75			IdleHook dw do_idle.ret
76
77			hlt_err db 'ERROR: idle with IF=0', CR, LF, 0
78
79			section .bss
80			IdleTimer resw 1