1/* 2 * FreeLoader 3 * Copyright (C) 1998-2002 Brian Palmer <brianp@sginet.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License along 16 * with this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 18 */ 19 20#include <asm.inc> 21#include <arch/pc/x86common.h> 22 23EXTERN i386CallRealMode:PROC 24 25.code32 26 27/* 28 * VOID BootOldLinuxKernel(ULONG KernelSize); 29 */ 30PUBLIC _BootOldLinuxKernel 31_BootOldLinuxKernel: 32 33 /* First we have to copy the kernel down from 0x100000 to 0x10000 */ 34 /* The reason we can overwrite low memory is because this code */ 35 /* executes between 0000:8000 and 0000:FFFF. That leaves space for */ 36 /* 32k of code before we start interfering with Linux kernel address space. */ 37 38 /* Get KernelSize in ECX and move the kernel down */ 39 mov ecx, [esp + 4] 40 mov esi, HEX(100000) 41 mov edi, HEX(10000) 42 rep movsb 43 44 /* Fall through */ 45 46PUBLIC _BootNewLinuxKernel 47_BootNewLinuxKernel: 48 49 mov bx, FNID_BootLinuxKernel 50 call i386CallRealMode 51 52 /* We should never get here */ 53 int 3 54 55END 56