1/*- 2 * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/amd64/amd64/locore.S,v 1.175 2003/05/31 06:54:28 peter Exp $ 27 */ 28 29#include <machine/asmacros.h> 30#include <machine/psl.h> 31#include <machine/pmap.h> 32#include <machine/specialreg.h> 33 34#include "assym.s" 35 36/* 37 * Compiled KERNBASE location 38 */ 39 .globl kernbase,loc_PTmap,loc_PDmap,loc_PDPmap,loc_PML4map,loc_PML4pml4e,dmapbase,dmapend 40 .set kernbase,KERNBASE 41 .set loc_PTmap,addr_PTmap 42 .set loc_PDmap,addr_PDmap 43 .set loc_PDPmap,addr_PDPmap 44 .set loc_PML4map,addr_PML4map 45 .set loc_PML4pml4e,addr_PML4pml4e 46 .set dmapbase,DMAP_MIN_ADDRESS 47 .set dmapend,DMAP_MAX_ADDRESS 48 49 .text 50/********************************************************************** 51 * 52 * This is where the loader trampoline start us, set the ball rolling... 53 * 54 * We are called with the stack looking like this: 55 * 0(%rsp) = 32 bit return address (cannot be used) 56 * 4(%rsp) = 32 bit modulep 57 * 8(%rsp) = 32 bit kernend 58 * 59 * We are already in long mode, on a 64 bit %cs and running at KERNBASE. 60 */ 61NON_GPROF_ENTRY(btext) 62 63 /* Tell the bios to warmboot next time */ 64 movw $0x1234,0x472 65 66 /* Don't trust what the loader gives for rflags. */ 67 pushq $PSL_KERNEL 68 popfq 69 70 /* Find the metadata pointers before we lose them */ 71 movq %rsp, %rbp 72 movl 4(%rbp),%edi /* modulep (arg 1) */ 73 movl 8(%rbp),%esi /* kernend (arg 2) */ 74 75 /* Get onto a stack that we can trust - there is no going back now. */ 76 movq $bootstack,%rsp 77 xorl %ebp, %ebp 78 79 call hammer_time /* set up cpu for unix operation */ 80 movq %rax,%rsp /* set up kstack for mi_startup() */ 81 call mi_startup /* autoconfiguration, mountroot etc */ 820: hlt 83 jmp 0b 84 85 .bss 86 ALIGN_DATA /* just to be sure */ 87 .space 0x1000 /* space for bootstack - temporary stack */ 88bootstack: 89