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 */
61 NON_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 */
82 0: hlt
83 jmp 0b
84
85 .bss
86 ALIGN_DATA /* just to be sure */
87 .space 0x1000 /* space for bootstack - temporary stack */
88 bootstack:
Cache object: 3775aae68dc425371a1290fa96898f24
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