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; -----------------------------------------------------------------------
;
; Copyright 2005-2008 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., 53 Temple Place Ste 330,
; Boston MA 02111-1307, USA; either version 2 of the License, or
; (at your option) any later version; incorporated herein by reference.
;
; -----------------------------------------------------------------------
;
; stack.inc
;
; How to reset the stack pointer
;
%ifndef _STACK_INC
%define _STACK_INC
;
; This macro resets the stack pointer (including SS), and sets
; DS == ES == 0, interrupts on, DF = 0.
;
; It takes a 16-bit register that can be safely clobbered as parameter.
;
%macro RESET_STACK_AND_SEGS 1
xor %1,%1
mov ds,%1
mov es,%1
lss esp,[BaseStack]
mov dword [PMESP],__stack_end ; Reset PM stack
sti
cld
%endmacro
section .data16
alignz 4
global BaseStack:data hidden
BaseStack dd StackHome ; ESP of the "home" stack pointer
dw 0 ; SS of the "home" stack pointer
section .text16
%endif ; _STACK_INC
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