2 * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #include <machine/asmacros.h>
30 #include <machine/psl.h>
31 #include <machine/pmap.h>
32 #include <machine/specialreg.h>
37 * Compiled KERNBASE location
39 .globl kernbase, kernload, loc_PTmap, loc_PDmap, loc_PDPmap, dmapbase, dmapend
40 .set kernbase,KERNBASE
41 .set kernload,KERNLOAD
42 .set dmapbase,DMAP_MIN_ADDRESS
43 .set dmapend,DMAP_MAX_ADDRESS
46 /**********************************************************************
48 * This is where the loader trampoline start us, set the ball rolling...
50 * We are called with the stack looking like this:
51 * 0(%rsp) = 32 bit return address (cannot be used)
52 * 4(%rsp) = 32 bit modulep
53 * 8(%rsp) = 32 bit kernend
55 * We are already in long mode, on a 64 bit %cs and running at KERNBASE.
57 NON_GPROF_ENTRY(btext)
59 /* Tell the bios to warmboot next time */
62 /* Don't trust what the loader gives for rflags. */
66 /* Find the metadata pointers before we lose them */
68 movl 4(%rbp),%edi /* modulep (arg 1) */
69 movl 8(%rbp),%esi /* kernend (arg 2) */
71 /* Get onto a stack that we can trust - there is no going back now. */
75 call hammer_time /* set up cpu for unix operation */
76 movq %rax,%rsp /* set up kstack for mi_startup() */
77 call mi_startup /* autoconfiguration, mountroot etc */
81 /* la57_trampoline(%rdi pml5) */
82 NON_GPROF_ENTRY(la57_trampoline)
85 leaq la57_trampoline_end(%rip),%rsp
88 lgdtq la57_trampoline_gdt_desc(%rip)
121 NON_GPROF_ENTRY(la57_trampoline_gdt_desc)
122 .word la57_trampoline_end - la57_trampoline_gdt
123 .long 0 /* filled by pmap_bootstrap_la57 */
125 NON_GPROF_ENTRY(la57_trampoline_gdt)
126 .long 0x00000000 /* null desc */
128 .long 0x00000000 /* 64bit code */
130 .long 0x0000ffff /* 32bit code */
132 .long 0x0000ffff /* universal data */
135 NON_GPROF_ENTRY(la57_trampoline_end)
138 ALIGN_DATA /* just to be sure */
140 .space 0x1000 /* space for bootstack - temporary stack */