Source-Changes-HG archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
[src/sommerfeld_i386mp_1]: src/sys/arch/i386/acpi ACPI wake-up code for i386....
details: https://anonhg.NetBSD.org/src/rev/0a4b252f1f82
branches: sommerfeld_i386mp_1
changeset: 482548:0a4b252f1f82
user: tshiozak <tshiozak%NetBSD.org@localhost>
date: Tue Jun 18 07:25:14 2002 +0000
description:
ACPI wake-up code for i386. but, we have no interface to use it efficiently.
diffstat:
sys/arch/i386/acpi/acpi_wakecode.S | 210 +++++++++++++++++++++++++++++++++++++
1 files changed, 210 insertions(+), 0 deletions(-)
diffs (214 lines):
diff -r 6b5bfdd57c52 -r 0a4b252f1f82 sys/arch/i386/acpi/acpi_wakecode.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/i386/acpi/acpi_wakecode.S Tue Jun 18 07:25:14 2002 +0000
@@ -0,0 +1,210 @@
+/* $NetBSD: acpi_wakecode.S,v 1.1.2.2 2002/06/18 07:25:14 tshiozak Exp $ */
+
+/*-
+ * Copyright (c) 2002 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Takuya SHIOZAKI.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+
+/*
+ * This code is derived from FreeBSD. Original copyrights:
+ *
+ * Copyright (c) 2001 Takanori Watanabe <takawata%jp.freebsd.org@localhost>
+ * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki%jp.freebsd.org@localhost>
+ * 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: src/sys/i386/acpica/acpi_wakecode.S,v 1.1 2001/07/20 06:07:31 takawata Exp
+ */
+
+#define LOCORE
+
+#include <machine/specialreg.h>
+#include <machine/param.h>
+
+ .code16
+ .org 0 /* ACPI spec says: cs==(phys>>8), ip==(phys&0x000F) */
+wakeup_16:
+ nop
+ cli
+
+ /* Set up segment registers for real mode */
+ movw %cs,%ax
+ movw %ax,%ds
+ movw %ax,%ss
+
+ /* Get physical address of the code */
+ xorl %esi,%esi
+ movw %cs,%si
+ shll $4,%esi
+
+ /* Fill 16->32 address */
+ movl %esi,%eax
+ addl $wakeup_32,%eax
+ movl %eax,wakeup_sw32+2
+ jmp 1f /* flush prefetch queue */
+1: jmp 1f
+1:
+
+ /* Load GDT while non-paging */
+ movl %esi,%eax
+ addl $tmp_gdtable,%eax
+ movl %eax,tmp_gdt+2
+ lgdt tmp_gdt
+
+ /* 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
+ .align 16
+wakeup_32:
+ /*
+ * Switched to protected mode w/o paging
+ */
+
+ 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 %ax,%fs
+
+ /* Fixup TSS type field; 386 busy TSS (11) -> 386 available TSS (9) */
+#define TSS_TYPEFIX_MASK 0xf9
+ movl physical_gdt+2(%esi),%ebx
+ movzxw previous_tr(%esi),%ecx
+ leal (%ebx,%ecx),%eax /* get TSS segment descriptor */
+ andb $TSS_TYPEFIX_MASK,5(%eax)
+
+ /* Enable paging (assumes identical mapping) */
+ movl previous_cr3(%esi),%eax
+ movl %eax,%cr3
+ movl previous_cr0(%esi),%eax
+ movl %eax,%cr0
+
+ /* Flush the prefetch queue */
+ jmp 1f
+1: jmp 1f
+1:
+
+ /* Restore registers */
+ lgdt previous_gdt(%esi)
+ lidt previous_idt(%esi)
+ lldt previous_ldt(%esi)
+ ltr previous_tr(%esi)
+
+ mov previous_cr2(%esi),%eax
+ mov %eax,%cr2
+ mov previous_cr4(%esi),%eax
+ mov %eax,%cr4
+
+ movw previous_es(%esi),%ax
+ movw %ax,%es
+ movw previous_fs(%esi),%ax
+ movw %ax,%fs
+ movw previous_gs(%esi),%ax
+ movw %ax,%gs
+ movw previous_ss(%esi),%ax
+ movw %ax,%ss
+ movl where_to_recover(%esi),%ebx
+ movw previous_ds(%esi),%ax
+ movw %ax,%ds
+ jmp *%ebx
+
+
+ .align 8
+tmp_gdt:
+ .word 0xffff
+ .long 0
+
+ .align 8, 0
+tmp_gdtable:
+ /* null */
+ .word 0, 0
+ .byte 0, 0, 0, 0
+ /* code */
+ .word 0xffff, 0
+ .byte 0, 0x9f, 0xcf, 0
+ /* data */
+ .word 0xffff, 0
+ .byte 0, 0x93, 0xcf, 0
+
+ .align 16, 0
+physical_gdt: .word 0
+ .long 0
+previous_cr2: .long 0
+previous_cr3: .long 0
+previous_cr4: .long 0
+previous_cr0: .long 0
+previous_tr: .word 0
+previous_gdt: .word 0
+ .long 0
+previous_ldt: .word 0
+previous_idt: .word 0
+ .long 0
+previous_ds: .word 0
+previous_es: .word 0
+previous_fs: .word 0
+previous_gs: .word 0
+previous_ss: .word 0
+where_to_recover: .long 0
Home |
Main Index |
Thread Index |
Old Index