diff options
| author | Jarkko Sakkinen <jarkko.sakkinen@intel.com> | 2012-05-08 21:22:29 +0300 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-05-08 11:46:05 -0700 |
| commit | c9b77ccb52a5c77233b0e557b7d4417b00ef4012 (patch) | |
| tree | 152d1c9b60796db21458583a76b57f995c4cd3bf /arch/x86/kernel/acpi/sleep.c | |
| parent | 48927bbb97c7d4cf343c05827ab9ac30c60678cb (diff) | |
| download | lwn-c9b77ccb52a5c77233b0e557b7d4417b00ef4012.tar.gz lwn-c9b77ccb52a5c77233b0e557b7d4417b00ef4012.zip | |
x86, realmode: Move ACPI wakeup to unified realmode code
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>
Diffstat (limited to 'arch/x86/kernel/acpi/sleep.c')
| -rw-r--r-- | arch/x86/kernel/acpi/sleep.c | 33 |
1 files changed, 4 insertions, 29 deletions
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c index 146a49c763a4..d941b62da4b6 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -14,8 +14,9 @@ #include <asm/desc.h> #include <asm/pgtable.h> #include <asm/cacheflush.h> +#include <asm/realmode.h> -#include "realmode/wakeup.h" +#include "../../realmode/rm/wakeup/wakeup.h" #include "sleep.h" unsigned long acpi_realmode_flags; @@ -36,13 +37,9 @@ asmlinkage void acpi_enter_s3(void) */ int acpi_suspend_lowlevel(void) { - struct wakeup_header *header; - /* address in low memory of the wakeup routine. */ - char *acpi_realmode; + struct wakeup_header *header = + (struct wakeup_header *) __va(real_mode_header.wakeup_header); - acpi_realmode = TRAMPOLINE_SYM(acpi_wakeup_code); - - header = (struct wakeup_header *)(acpi_realmode + WAKEUP_HEADER_OFFSET); if (header->signature != WAKEUP_HEADER_SIGNATURE) { printk(KERN_ERR "wakeup header does not match\n"); return -EINVAL; @@ -50,27 +47,6 @@ int acpi_suspend_lowlevel(void) header->video_mode = saved_video_mode; - header->wakeup_jmp_seg = acpi_wakeup_address >> 4; - - /* - * Set up the wakeup GDT. We set these up as Big Real Mode, - * that is, with limits set to 4 GB. At least the Lenovo - * Thinkpad X61 is known to need this for the video BIOS - * initialization quirk to work; this is likely to also - * be the case for other laptops or integrated video devices. - */ - - /* GDT[0]: GDT self-pointer */ - header->wakeup_gdt[0] = - (u64)(sizeof(header->wakeup_gdt) - 1) + - ((u64)__pa(&header->wakeup_gdt) << 16); - /* GDT[1]: big real mode-like code segment */ - header->wakeup_gdt[1] = - GDT_ENTRY(0x809b, acpi_wakeup_address, 0xfffff); - /* GDT[2]: big real mode-like data segment */ - header->wakeup_gdt[2] = - GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff); - #ifndef CONFIG_64BIT store_gdt((struct desc_ptr *)&header->pmode_gdt); @@ -95,7 +71,6 @@ int acpi_suspend_lowlevel(void) header->pmode_cr3 = (u32)__pa(&initial_page_table); saved_magic = 0x12345678; #else /* CONFIG_64BIT */ - header->trampoline_segment = trampoline_address() >> 4; #ifdef CONFIG_SMP stack_start = (unsigned long)temp_stack + sizeof(temp_stack); early_gdt_descr.address = |