/*- * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: src/sys/amd64/amd64/locore.S,v 1.175 2003/05/31 06:54:28 peter Exp $ */ #include <machine/asmacros.h> #include <machine/psl.h> #include <machine/pmap.h> #include <machine/specialreg.h> #include "assym.s" /* * Compiled KERNBASE location */ .globl kernbase,loc_PTmap,loc_PDmap,loc_PDPmap,loc_PML4map,loc_PML4pml4e,dmapbase,dmapend .set kernbase,KERNBASE .set loc_PTmap,addr_PTmap .set loc_PDmap,addr_PDmap .set loc_PDPmap,addr_PDPmap .set loc_PML4map,addr_PML4map .set loc_PML4pml4e,addr_PML4pml4e .set dmapbase,DMAP_MIN_ADDRESS .set dmapend,DMAP_MAX_ADDRESS .text /********************************************************************** * * This is where the loader trampoline start us, set the ball rolling... * * We are called with the stack looking like this: * 0(%rsp) = 32 bit return address (cannot be used) * 4(%rsp) = 32 bit modulep * 8(%rsp) = 32 bit kernend * * We are already in long mode, on a 64 bit %cs and running at KERNBASE. */ NON_GPROF_ENTRY(btext) /* Tell the bios to warmboot next time */ movw $0x1234,0x472 /* Don't trust what the loader gives for rflags. */ pushq $PSL_KERNEL popfq /* Find the metadata pointers before we lose them */ movq %rsp, %rbp movl 4(%rbp),%edi /* modulep (arg 1) */ movl 8(%rbp),%esi /* kernend (arg 2) */ /* Get onto a stack that we can trust - there is no going back now. */ movq $bootstack,%rsp xorl %ebp, %ebp call hammer_time /* set up cpu for unix operation */ movq %rax,%rsp /* set up kstack for mi_startup() */ call mi_startup /* autoconfiguration, mountroot etc */ 0: hlt jmp 0b .bss ALIGN_DATA /* just to be sure */ .space 16384 /* space for bootstack - temporary */ bootstack:
