mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 08:28:13 +00:00
c9b77ccb52
Migrated ACPI wakeup code to the real-mode blob. Code existing in .x86_trampoline can be completely removed. Static descriptor table in wakeup_asm.S is courtesy of H. Peter Anvin. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-7-git-send-email-jarkko.sakkinen@intel.com Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Len Brown <len.brown@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/*
|
|
* sleep.c - x86-specific ACPI sleep support.
|
|
*
|
|
* Copyright (C) 2001-2003 Patrick Mochel
|
|
* Copyright (C) 2001-2003 Pavel Machek <pavel@ucw.cz>
|
|
*/
|
|
|
|
#include <linux/acpi.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/dmi.h>
|
|
#include <linux/cpumask.h>
|
|
#include <asm/segment.h>
|
|
#include <asm/desc.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/realmode.h>
|
|
|
|
#include "../../realmode/rm/wakeup/wakeup.h"
|
|
#include "sleep.h"
|
|
|
|
unsigned long acpi_realmode_flags;
|
|
|
|
#if defined(CONFIG_SMP) && defined(CONFIG_64BIT)
|
|
static char temp_stack[4096];
|
|
#endif
|
|
|
|
asmlinkage void acpi_enter_s3(void)
|
|
{
|
|
acpi_enter_sleep_state(3, wake_sleep_flags);
|
|
}
|
|
/**
|
|
* acpi_suspend_lowlevel - save kernel state
|
|
*
|
|
* Create an identity mapped page table and copy the wakeup routine to
|
|
* low memory.
|
|
*/
|
|
int acpi_suspend_lowlevel(void)
|
|
{
|
|
struct wakeup_header *header =
|
|
(struct wakeup_header *) __va(real_mode_header.wakeup_header);
|
|
|
|
if (header->signature != WAKEUP_HEADER_SIGNATURE) {
|
|
printk(KERN_ERR "wakeup header does not match\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
header->video_mode = saved_video_mode;
|
|
|
|
#ifndef CONFIG_64BIT
|
|
store_gdt((struct desc_ptr *)&header->pmode_gdt);
|
|
|
|
if (rdmsr_safe(MSR_EFER, &header->pmode_efer_low,
|
|
&header->pmode_efer_high))
|
|
header->pmode_efer_low = header->pmode_efer_high = 0;
|
|
#endif /* !CONFIG_64BIT */
|
|
|
|
header->pmode_cr0 = read_cr0();
|
|
header->pmode_cr4 = read_cr4_safe();
|
|
header->pmode_behavior = 0;
|
|
if (!rdmsr_safe(MSR_IA32_MISC_ENABLE,
|
|
&header->pmode_misc_en_low,
|
|
&header->pmode_misc_en_high))
|
|
header->pmode_behavior |=
|
|
(1 << WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE);
|
|
header->realmode_flags = acpi_realmode_flags;
|
|
header->real_magic = 0x12345678;
|
|
|
|
#ifndef CONFIG_64BIT
|
|
header->pmode_entry = (u32)&wakeup_pmode_return;
|
|
header->pmode_cr3 = (u32)__pa(&initial_page_table);
|
|
saved_magic = 0x12345678;
|
|
#else /* CONFIG_64BIT */
|
|
#ifdef CONFIG_SMP
|
|
stack_start = (unsigned long)temp_stack + sizeof(temp_stack);
|
|
early_gdt_descr.address =
|
|
(unsigned long)get_cpu_gdt_table(smp_processor_id());
|
|
initial_gs = per_cpu_offset(smp_processor_id());
|
|
#endif
|
|
initial_code = (unsigned long)wakeup_long64;
|
|
saved_magic = 0x123456789abcdef0L;
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
do_suspend_lowlevel();
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
#ifdef CONFIG_HIBERNATION
|
|
if (strncmp(str, "s4_nohwsig", 10) == 0)
|
|
acpi_no_s4_hw_signature();
|
|
#endif
|
|
if (strncmp(str, "nonvs", 5) == 0)
|
|
acpi_nvs_nosave();
|
|
if (strncmp(str, "old_ordering", 12) == 0)
|
|
acpi_old_suspend_ordering();
|
|
str = strchr(str, ',');
|
|
if (str != NULL)
|
|
str += strspn(str, ", \t");
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_sleep=", acpi_sleep_setup);
|