2001-07-20 06:07:34 +00:00
|
|
|
/*-
|
|
|
|
* Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
|
|
|
|
* Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.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.
|
|
|
|
*/
|
|
|
|
|
2003-06-02 06:16:45 +00:00
|
|
|
#include <machine/asm.h>
|
|
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
|
2001-07-20 06:07:34 +00:00
|
|
|
#define LOCORE
|
|
|
|
|
2003-11-01 00:18:29 +00:00
|
|
|
#include <machine/param.h>
|
2001-07-20 06:07:34 +00:00
|
|
|
#include <machine/specialreg.h>
|
|
|
|
|
|
|
|
.align 4
|
|
|
|
.code16
|
|
|
|
wakeup_16:
|
|
|
|
nop
|
|
|
|
cli
|
|
|
|
|
2003-11-01 00:18:29 +00:00
|
|
|
/*
|
|
|
|
* Set up segment registers for real mode and a small stack for
|
|
|
|
* any calls we make.
|
|
|
|
*/
|
2001-07-20 06:07:34 +00:00
|
|
|
movw %cs,%ax
|
|
|
|
movw %ax,%ds
|
|
|
|
movw %ax,%ss
|
2003-11-01 00:18:29 +00:00
|
|
|
movw $PAGE_SIZE,%sp
|
|
|
|
|
|
|
|
/* Re-initialize video BIOS if the reset_video tunable is set. */
|
|
|
|
cmp $1,reset_video
|
|
|
|
je wakeup_16_gdt
|
|
|
|
lcall $0xc000,$3
|
|
|
|
|
2003-10-27 06:26:51 +00:00
|
|
|
/*
|
2003-11-01 00:18:29 +00:00
|
|
|
* Set up segment registers for real mode again in case the
|
|
|
|
* previous BIOS call clobbers them.
|
2003-10-27 06:26:51 +00:00
|
|
|
*/
|
2003-11-01 00:18:29 +00:00
|
|
|
movw %cs,%ax
|
|
|
|
movw %ax,%ds
|
|
|
|
movw %ax,%ss
|
2001-07-20 06:07:34 +00:00
|
|
|
|
2003-10-30 16:14:55 +00:00
|
|
|
wakeup_16_gdt:
|
2001-07-20 06:07:34 +00:00
|
|
|
/* Load GDT for real mode */
|
|
|
|
lgdt physical_gdt
|
|
|
|
|
|
|
|
/* Restore CR2, CR3 and CR4 */
|
|
|
|
mov previous_cr2,%eax
|
|
|
|
mov %eax,%cr2
|
|
|
|
mov previous_cr3,%eax
|
|
|
|
mov %eax,%cr3
|
|
|
|
mov previous_cr4,%eax
|
|
|
|
mov %eax,%cr4
|
|
|
|
|
|
|
|
/* Transfer some values to protected mode */
|
|
|
|
#define NVALUES 9
|
|
|
|
#define TRANSFER_STACK32(val, idx) \
|
|
|
|
mov val,%eax; \
|
|
|
|
mov %eax,wakeup_32stack+(idx+1)+(idx*4);
|
|
|
|
|
|
|
|
TRANSFER_STACK32(previous_ss, (NVALUES - 9))
|
|
|
|
TRANSFER_STACK32(previous_fs, (NVALUES - 8))
|
|
|
|
TRANSFER_STACK32(previous_ds, (NVALUES - 7))
|
|
|
|
TRANSFER_STACK32(physical_gdt+2, (NVALUES - 6))
|
|
|
|
TRANSFER_STACK32(where_to_recover, (NVALUES - 5))
|
|
|
|
TRANSFER_STACK32(previous_idt+2, (NVALUES - 4))
|
|
|
|
TRANSFER_STACK32(previous_ldt, (NVALUES - 3))
|
|
|
|
TRANSFER_STACK32(previous_gdt+2, (NVALUES - 2))
|
|
|
|
TRANSFER_STACK32(previous_tr, (NVALUES - 1))
|
|
|
|
TRANSFER_STACK32(previous_cr0, (NVALUES - 0))
|
|
|
|
|
|
|
|
mov physical_esp,%esi /* to be used in 32bit code */
|
|
|
|
|
|
|
|
/* Enable protected mode */
|
|
|
|
mov %cr0,%eax
|
|
|
|
orl $(CR0_PE),%eax
|
|
|
|
mov %eax,%cr0
|
|
|
|
|
|
|
|
wakeup_sw32:
|
|
|
|
/* Switch to protected mode by intersegmental jump */
|
|
|
|
ljmpl $0x8,$0x12345678 /* Code location, to be replaced */
|
|
|
|
|
|
|
|
.code32
|
|
|
|
wakeup_32:
|
|
|
|
/*
|
|
|
|
* Switched to protected mode w/o paging
|
|
|
|
* %esi: KERNEL stack pointer (physical address)
|
|
|
|
*/
|
|
|
|
|
|
|
|
nop
|
|
|
|
|
|
|
|
/* Set up segment registers for protected mode */
|
|
|
|
movw $0x10,%ax /* KDSEL to segment registers */
|
|
|
|
movw %ax,%ds
|
|
|
|
movw %ax,%es
|
|
|
|
movw %ax,%gs
|
|
|
|
movw %ax,%ss
|
|
|
|
movw $0x18,%ax /* KPSEL to %fs */
|
|
|
|
movw %ax,%fs
|
|
|
|
movl %esi,%esp /* physical address stack pointer */
|
|
|
|
|
|
|
|
wakeup_32stack:
|
|
|
|
/* Operands are overwritten in 16bit code */
|
|
|
|
pushl $0xabcdef09 /* ss + dummy */
|
|
|
|
pushl $0xabcdef08 /* fs + gs */
|
|
|
|
pushl $0xabcdef07 /* ds + es */
|
|
|
|
pushl $0xabcdef06 /* gdt:base (physical address) */
|
|
|
|
pushl $0xabcdef05 /* recover address */
|
|
|
|
pushl $0xabcdef04 /* idt:base */
|
|
|
|
pushl $0xabcdef03 /* ldt + idt:limit */
|
|
|
|
pushl $0xabcdef02 /* gdt:base */
|
|
|
|
pushl $0xabcdef01 /* TR + gdt:limit */
|
|
|
|
pushl $0xabcdef00 /* CR0 */
|
|
|
|
|
|
|
|
movl %esp,%ebp
|
|
|
|
#define CR0_REGISTER 0(%ebp)
|
|
|
|
#define TASK_REGISTER 4(%ebp)
|
|
|
|
#define PREVIOUS_GDT 6(%ebp)
|
|
|
|
#define PREVIOUS_LDT 12(%ebp)
|
|
|
|
#define PREVIOUS_IDT 14(%ebp)
|
|
|
|
#define RECOVER_ADDR 20(%ebp)
|
|
|
|
#define PHYSICAL_GDT_BASE 24(%ebp)
|
|
|
|
#define PREVIOUS_DS 28(%ebp)
|
|
|
|
#define PREVIOUS_ES 30(%ebp)
|
|
|
|
#define PREVIOUS_FS 32(%ebp)
|
|
|
|
#define PREVIOUS_GS 34(%ebp)
|
|
|
|
#define PREVIOUS_SS 36(%ebp)
|
|
|
|
|
|
|
|
/* Fixup TSS type field */
|
|
|
|
#define TSS_TYPEFIX_MASK 0xf9
|
|
|
|
xorl %esi,%esi
|
|
|
|
movl PHYSICAL_GDT_BASE,%ebx
|
|
|
|
movw TASK_REGISTER,%si
|
|
|
|
leal (%ebx,%esi),%eax /* get TSS segment descriptor */
|
|
|
|
andb $TSS_TYPEFIX_MASK,5(%eax)
|
|
|
|
|
|
|
|
/* Prepare to return to sleep/wakeup code point */
|
|
|
|
lgdt PREVIOUS_GDT
|
|
|
|
lidt PREVIOUS_IDT
|
|
|
|
|
|
|
|
xorl %eax,%eax
|
|
|
|
movl %eax,%ebx
|
|
|
|
movl %eax,%ecx
|
|
|
|
movl %eax,%edx
|
|
|
|
movl %eax,%esi
|
|
|
|
movl %eax,%edi
|
|
|
|
movl PREVIOUS_DS,%ebx
|
|
|
|
movl PREVIOUS_FS,%ecx
|
|
|
|
movl PREVIOUS_SS,%edx
|
|
|
|
movw TASK_REGISTER,%si
|
|
|
|
shll $16,%esi
|
|
|
|
movw PREVIOUS_LDT,%si
|
|
|
|
movl RECOVER_ADDR,%edi
|
|
|
|
|
|
|
|
/* Enable paging and etc. */
|
|
|
|
movl CR0_REGISTER,%eax
|
|
|
|
movl %eax,%cr0
|
|
|
|
|
|
|
|
/* Flush the prefetch queue */
|
|
|
|
jmp 1f
|
|
|
|
1: jmp 1f
|
|
|
|
1:
|
|
|
|
/*
|
|
|
|
* Now that we are in kernel virtual memory addressing
|
|
|
|
* %ebx: ds + es
|
|
|
|
* %ecx: fs + gs
|
|
|
|
* %edx: ss + dummy
|
|
|
|
* %esi: LDTR + TR
|
|
|
|
* %edi: recover address
|
|
|
|
*/
|
|
|
|
|
|
|
|
nop
|
|
|
|
|
|
|
|
movl %esi,%eax /* LDTR + TR */
|
|
|
|
lldt %ax /* load LDT register */
|
|
|
|
shrl $16,%eax
|
|
|
|
ltr %ax /* load task register */
|
|
|
|
|
|
|
|
/* Restore segment registers */
|
|
|
|
movl %ebx,%eax /* ds + es */
|
|
|
|
movw %ax,%ds
|
|
|
|
shrl $16,%eax
|
|
|
|
movw %ax,%es
|
|
|
|
movl %ecx,%eax /* fs + gs */
|
|
|
|
movw %ax,%fs
|
|
|
|
shrl $16,%eax
|
|
|
|
movw %ax,%gs
|
|
|
|
movl %edx,%eax /* ss */
|
|
|
|
movw %ax,%ss
|
|
|
|
|
|
|
|
/* Jump to acpi_restorecpu() */
|
|
|
|
jmp *%edi
|
|
|
|
|
|
|
|
/* used in real mode */
|
|
|
|
physical_gdt: .word 0
|
|
|
|
.long 0
|
|
|
|
physical_esp: .long 0
|
|
|
|
previous_cr2: .long 0
|
|
|
|
previous_cr3: .long 0
|
|
|
|
previous_cr4: .long 0
|
2003-11-01 00:18:29 +00:00
|
|
|
reset_video: .long 0
|
2001-07-20 06:07:34 +00:00
|
|
|
|
|
|
|
/* transfer from real mode to protected mode */
|
|
|
|
previous_cr0: .long 0
|
|
|
|
previous_tr: .word 0
|
|
|
|
previous_gdt: .word 0
|
|
|
|
.long 0
|
|
|
|
previous_ldt: .word 0
|
|
|
|
previous_idt: .word 0
|
|
|
|
.long 0
|
|
|
|
where_to_recover: .long 0
|
|
|
|
previous_ds: .word 0
|
|
|
|
previous_es: .word 0
|
|
|
|
previous_fs: .word 0
|
|
|
|
previous_gs: .word 0
|
|
|
|
previous_ss: .word 0
|
|
|
|
dummy: .word 0
|