mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
a3c464fb3c
Move logic of building ACPI headers for acpi_wakeup.c into better places, remove intermediate makefile and shell script, and reduce diff between i386 and amd64.
260 lines
6.9 KiB
ArmAsm
260 lines
6.9 KiB
ArmAsm
/*-
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <machine/asmacros.h>
|
|
#include <machine/specialreg.h>
|
|
|
|
#include "assym.s"
|
|
|
|
/*
|
|
* Resume entry point. The BIOS enters here in real mode after POST with
|
|
* CS set to the page where we stored this code. It should configure the
|
|
* segment registers with a flat 4 GB address space and EFLAGS.IF = 0.
|
|
* Depending on the previous sleep state, we may need to initialize more
|
|
* of the system (i.e., S3 suspend-to-RAM vs. S4 suspend-to-disk).
|
|
*/
|
|
.align 4
|
|
.code16
|
|
wakeup_16:
|
|
nop
|
|
cli
|
|
cld
|
|
|
|
/*
|
|
* Set up segment registers for real mode, a small stack for
|
|
* any calls we make, and clear any flags.
|
|
*/
|
|
movw %cs,%ax
|
|
movw %ax,%ds
|
|
movw %ax,%ss
|
|
movw $PAGE_SIZE,%sp
|
|
pushl $0
|
|
popfl
|
|
|
|
/* To debug resume hangs, beep the speaker if the user requested. */
|
|
cmpl $1,resume_beep
|
|
jne nobeep
|
|
movb $0xc0,%al
|
|
outb %al,$0x42
|
|
movb $0x04,%al
|
|
outb %al,$0x42
|
|
inb $0x61,%al
|
|
orb $0x3,%al
|
|
outb %al,$0x61
|
|
nobeep:
|
|
|
|
/* Re-initialize video BIOS if the reset_video tunable is set. */
|
|
cmpl $1,reset_video
|
|
jne nobiosreset
|
|
lcall $0xc000,$3
|
|
|
|
/*
|
|
* Set up segment registers for real mode again in case the
|
|
* previous BIOS call clobbers them.
|
|
*/
|
|
movw %cs,%ax
|
|
movw %ax,%ds
|
|
movw %ax,%ss
|
|
nobiosreset:
|
|
|
|
/* Load GDT for real mode. Use 32 bit prefix for addresses >16 MB. */
|
|
lgdtl physical_gdt
|
|
|
|
/* Restore CR2, CR3 and CR4 */
|
|
movl previous_cr2,%eax
|
|
movl %eax,%cr2
|
|
movl previous_cr3,%eax
|
|
movl %eax,%cr3
|
|
movl previous_cr4,%eax
|
|
movl %eax,%cr4
|
|
|
|
/* Transfer some values to protected mode with an inline stack */
|
|
#define NVALUES 9
|
|
#define TRANSFER_STACK32(val, idx) \
|
|
movl val,%eax; \
|
|
movl %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 */
|
|
movl %cr0,%eax
|
|
orl $(CR0_PE),%eax
|
|
movl %eax,%cr0
|
|
|
|
wakeup_sw32:
|
|
/* Switch to protected mode by intersegmental jump */
|
|
ljmpl $KCSEL,$0x12345678 /* Code location, to be replaced */
|
|
|
|
/*
|
|
* Now switched to protected mode without paging enabled.
|
|
* %esi: KERNEL stack pointer (physical address)
|
|
*/
|
|
.code32
|
|
wakeup_32:
|
|
nop
|
|
|
|
/* Set up segment registers for protected mode */
|
|
movw $KDSEL,%ax /* KDSEL to segment registers */
|
|
movw %ax,%ds
|
|
movw %ax,%es
|
|
movw %ax,%gs
|
|
movw %ax,%ss
|
|
movw $KPSEL,%ax /* KPSEL to %fs */
|
|
movw %ax,%fs
|
|
movl %esi,%esp /* physical address stack pointer */
|
|
|
|
wakeup_32stack:
|
|
/* Operands are overwritten in 16 bit code by TRANSFER_STACK32 macro */
|
|
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 */
|
|
lgdtl PREVIOUS_GDT
|
|
lidtl PREVIOUS_IDT
|
|
|
|
/* Pack values from the GDT to be loaded into segment registers. */
|
|
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 we are in kernel virtual memory addressing with the following
|
|
* original register values:
|
|
* %ebx: ds + es
|
|
* %ecx: fs + gs
|
|
* %edx: ss + dummy
|
|
* %esi: LDTR + TR
|
|
* %edi: recover address
|
|
* We'll load these back into the segment registers now.
|
|
*/
|
|
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
|
|
resume_beep: .long 0
|
|
reset_video: .long 0
|
|
|
|
/*
|
|
* Transfer from real mode to protected mode. The order of these variables
|
|
* is very important, DO NOT INSERT OR CHANGE unless you know why.
|
|
*/
|
|
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
|