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| author |   Borislav Petkov <bp@alien8.de> | 2010-08-28 15:58:33 +0200 |
|---|---|---|
| committer |   H. Peter Anvin <hpa@linux.intel.com> | 2010-10-20 14:23:55 -0700 |
| commit | b40827fa7268fda8a62490728a61c2856f33830b (patch) | |
| tree | ae16ce8206c3d72ca672a92a46dc0725faba1ced /arch/x86/kernel/acpi | |
| parent | Merge branch 'x86/cleanups' into x86/trampoline (diff) | |
| download | linux-dev-b40827fa7268fda8a62490728a61c2856f33830b.tar.xz linux-dev-b40827fa7268fda8a62490728a61c2856f33830b.zip | |
x86-32, mm: Add an initial page table for core bootstrapping
This patch adds an initial page table with low mappings used exclusively
for booting APs/resuming after ACPI suspend/machine restart. After this,
there's no need to add low mappings to swapper_pg_dir and zap them later
or create own swsusp PGD page solely for ACPI sleep needs - we have
initial_page_table for that.
Signed-off-by: Borislav Petkov <bp@alien8.de>
LKML-Reference: <20101020070526.GA9588@liondog.tnic>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/acpi')
| -rw-r--r-- | arch/x86/kernel/acpi/sleep.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c index 33cec152070d..b35e1ab8ba03 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -12,6 +12,11 @@ #include <asm/segment.h> #include <asm/desc.h> +#ifdef CONFIG_X86_32 +#include <asm/pgtable.h> +#include <asm/pgtable_32.h> +#endif + #include "realmode/wakeup.h" #include "sleep.h" @@ -90,7 +95,7 @@ int acpi_save_state_mem(void) #ifndef CONFIG_64BIT header->pmode_entry = (u32)&wakeup_pmode_return; - header->pmode_cr3 = (u32)(swsusp_pg_dir - __PAGE_OFFSET); + header->pmode_cr3 = (u32)__pa(&initial_page_table); saved_magic = 0x12345678; #else /* CONFIG_64BIT */ header->trampoline_segment = setup_trampoline() >> 4; |