mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
![Thomas Gleixner](/assets/img/avatar_default.png)
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
/*
|
|
* acpi.c - Architecture-Specific Low-Level ACPI Support
|
|
*
|
|
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
|
|
* Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
|
|
* Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
|
|
* Copyright (C) 2002 Andi Kleen, SuSE Labs (x86-64 port)
|
|
* Copyright (C) 2003 Pavel Machek, SuSE Labs
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/cpumask.h>
|
|
|
|
#include <asm/mpspec.h>
|
|
#include <asm/io.h>
|
|
#include <asm/apic.h>
|
|
#include <asm/apicdef.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/io_apic.h>
|
|
#include <asm/proto.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Low-Level Sleep Support
|
|
-------------------------------------------------------------------------- */
|
|
|
|
/* address in low memory of the wakeup routine. */
|
|
unsigned long acpi_wakeup_address = 0;
|
|
unsigned long acpi_realmode_flags;
|
|
extern char wakeup_start, wakeup_end;
|
|
|
|
extern unsigned long acpi_copy_wakeup_routine(unsigned long);
|
|
|
|
/**
|
|
* acpi_save_state_mem - save kernel state
|
|
*
|
|
* Create an identity mapped page table and copy the wakeup routine to
|
|
* low memory.
|
|
*/
|
|
int acpi_save_state_mem(void)
|
|
{
|
|
memcpy((void *)acpi_wakeup_address, &wakeup_start,
|
|
&wakeup_end - &wakeup_start);
|
|
acpi_copy_wakeup_routine(acpi_wakeup_address);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* acpi_restore_state
|
|
*/
|
|
void acpi_restore_state_mem(void)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* acpi_reserve_bootmem - do _very_ early ACPI initialisation
|
|
*
|
|
* We allocate a page in low memory for the wakeup
|
|
* routine for when we come back from a sleep state. The
|
|
* runtime allocator allows specification of <16M pages, but not
|
|
* <1M pages.
|
|
*/
|
|
void __init acpi_reserve_bootmem(void)
|
|
{
|
|
acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE*2);
|
|
if ((&wakeup_end - &wakeup_start) > (PAGE_SIZE*2))
|
|
printk(KERN_CRIT
|
|
"ACPI: Wakeup code way too big, will crash on attempt"
|
|
" to suspend\n");
|
|
}
|
|
|
|
static int __init acpi_sleep_setup(char *str)
|
|
{
|
|
while ((str != NULL) && (*str != '\0')) {
|
|
if (strncmp(str, "s3_bios", 7) == 0)
|
|
acpi_realmode_flags |= 1;
|
|
if (strncmp(str, "s3_mode", 7) == 0)
|
|
acpi_realmode_flags |= 2;
|
|
if (strncmp(str, "s3_beep", 7) == 0)
|
|
acpi_realmode_flags |= 4;
|
|
str = strchr(str, ',');
|
|
if (str != NULL)
|
|
str += strspn(str, ", \t");
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_sleep=", acpi_sleep_setup);
|
|
|
|
void acpi_pci_link_exit(void)
|
|
{
|
|
}
|