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;; -----------------------------------------------------------------------
;;
;; Copyright 1994-2009 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., 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.
;;
;; -----------------------------------------------------------------------
;;
;; bcopy32.inc
;;
;; 32-bit bcopy routine for real mode
;;
;
; 32-bit bcopy routine for real mode
;
; We enter protected mode, set up a flat 32-bit environment, run rep movsd
; and then exit. IMPORTANT: This code assumes cs == 0.
;
; This code is probably excessively anal-retentive in its handling of
; segments, but this stuff is painful enough as it is without having to rely
; on everything happening "as it ought to."
;
bits 16
section .text16
;
; bcopy:
; 32-bit copy, overlap safe
;
; Inputs:
; ESI - source pointer (-1 means do bzero rather than bcopy)
; EDI - target pointer
; ECX - byte count
;
; Outputs:
; ESI - first byte after source (garbage if ESI == -1 on entry)
; EDI - first byte after target
;
bcopy: jecxz .ret
pm_call pm_bcopy
add edi,ecx
add esi,ecx
.ret: ret
;
; shuffle_and_boot_raw:
; The new version of shuffle and boot.
; Inputs:
; ESI -> Pointer to list of (dst, src, len) pairs(*)
; EDI -> Pointer to safe area for list + shuffler
; (must not overlap this code nor the RM stack)
; ECX -> Byte count of list area (for initial copy)
;
; If src == -1: then the memory pointed to by (dst, len) is bzeroed;
; this is handled inside the bcopy routine.
;
; If len == 0: this marks the end of the list; dst indicates
; the entry point and src the mode (0 = pm, 1 = rm)
;
shuffle_and_boot_raw:
mov bx,pm_shuffle
jmp enter_pm
;
; The 32-bit copy and shuffle code is "special", so it is in its own file
;
%include "bcopyxx.inc"
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