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 ; 47 bcopy: 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 ; 70 shuffle_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
