1;; -----------------------------------------------------------------------
2;;
3;;   Copyright 1994-2009 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., 53 Temple Place Ste 330,
9;;   Boston MA 02111-1307, USA; either version 2 of the License, or
10;;   (at your option) any later version; incorporated herein by reference.
11;;
12;; -----------------------------------------------------------------------
13
14;;
15;; bcopy32.inc
16;;
17;; 32-bit bcopy routine for real mode
18;;
19
20;
21; 32-bit bcopy routine for real mode
22;
23; We enter protected mode, set up a flat 32-bit environment, run rep movsd
24; and then exit.  IMPORTANT: This code assumes cs == 0.
25;
26; This code is probably excessively anal-retentive in its handling of
27; segments, but this stuff is painful enough as it is without having to rely
28; on everything happening "as it ought to."
29;
30
31		bits 16
32		section .text16
33
34;
35; bcopy:
36;	32-bit copy, overlap safe
37;
38; Inputs:
39;	ESI	- source pointer (-1 means do bzero rather than bcopy)
40;	EDI	- target pointer
41;	ECX	- byte count
42;
43; Outputs:
44;	ESI	- first byte after source (garbage if ESI == -1 on entry)
45;	EDI	- first byte after target
46;
47bcopy:		jecxz .ret
48		pm_call pm_bcopy
49		add edi,ecx
50		add esi,ecx
51.ret:		ret
52
53;
54; shuffle_and_boot_raw:
55;	The new version of shuffle and boot.
56; Inputs:
57;	ESI		-> Pointer to list of (dst, src, len) pairs(*)
58;	EDI		-> Pointer to safe area for list + shuffler
59;			   (must not overlap this code nor the RM stack)
60;	ECX		-> Byte count of list area (for initial copy)
61;
62;     If src == -1: then the memory pointed to by (dst, len) is bzeroed;
63;		    this is handled inside the bcopy routine.
64;
65;     If len == 0:  this marks the end of the list; dst indicates
66;		    the entry point and src the mode (0 = pm, 1 = rm)
67;
68;     (*) dst, src, and len are four bytes each
69;
70shuffle_and_boot_raw:
71		mov bx,pm_shuffle
72		jmp enter_pm
73
74;
75; The 32-bit copy and shuffle code is "special", so it is in its own file
76;
77%include "bcopyxx.inc"
78