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	;; -- 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