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/*-
* 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.
*
* $FreeBSD$
*/
#include <machine/asmacros.h>
#include <machine/psl.h>
#include <machine/pmap.h>
#include <machine/specialreg.h>
#include "assym.inc"
/*
* Compiled KERNBASE location
*/
.globl kernbase, kernload, loc_PTmap, loc_PDmap, loc_PDPmap, dmapbase, dmapend
.set kernbase,KERNBASE
.set kernload,KERNLOAD
.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.
*/
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
/* la57_trampoline(%rdi pml5) */
ENTRY(la57_trampoline)
movq %rsp,%r11
movq %rbx,%r10
leaq la57_trampoline_end(%rip),%rsp
movq %cr0,%rdx
lgdtq la57_trampoline_gdt_desc(%rip)
pushq $(2<<3)
leaq l1(%rip),%rax
leaq l2(%rip),%rbx
pushq %rax
lretq
.code32
l1: movl $(3<<3),%eax
movl %eax,%ss
movl %edx,%eax
andl $~CR0_PG,%eax
movl %eax,%cr0
movl %cr4,%eax
orl $CR4_LA57,%eax
movl %eax,%cr4
movl %edi,%cr3
movl %edx,%cr0
pushl $(1<<3)
pushl %ebx
lretl
.code64
l2: movq %r11,%rsp
movq %r10,%rbx
retq
.p2align 4,0
ENTRY(la57_trampoline_gdt_desc)
.word la57_trampoline_end - la57_trampoline_gdt
.long 0 /* filled by pmap_bootstrap_la57 */
.p2align 4,0
ENTRY(la57_trampoline_gdt)
.long 0x00000000 /* null desc */
.long 0x00000000
.long 0x00000000 /* 64bit code */
.long 0x00209800
.long 0x0000ffff /* 32bit code */
.long 0x00cf9b00
.long 0x0000ffff /* universal data */
.long 0x00cf9300
.dcb.l 16,0
ENTRY(la57_trampoline_end)
.bss
ALIGN_DATA /* just to be sure */
.globl bootstack
.space 0x1000 /* space for bootstack - temporary stack */
bootstack:
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