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;; -*- fundamental -*- ---------------------------------------------------
;;
;; Copyright 2008 H. Peter Anvin - All Rights Reserved
;; Copyright 2009-2010 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 .text16
TICKS_TO_IDLE equ 4 ; Also in idle.c
reset_idle:
push eax
mov eax,[cs:__jiffies]
mov [cs:_IdleTimer],eax
pop eax
sti ; Guard against BIOS/PXE brokenness...
ret
do_idle:
push eax
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:
; Don't spend time jumping to PM unless we're actually idle...
mov eax,[__jiffies]
sub eax,[_IdleTimer]
cmp eax,TICKS_TO_IDLE
jb .done
extern __idle
pm_call __idle
.done:
pop es
pop ds
pop eax
.ret: ret
section .data16
alignz 4
global _IdleTimer
_IdleTimer dd 0
global NoHalt
NoHalt dw 0
hlt_err db 'ERROR: idle with IF=0', CR, LF, 0
section .text16
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