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authorThomas Renninger <trenn@suse.de>2012-10-01 00:23:53 +0200
committerH. Peter Anvin <hpa@linux.intel.com>2012-09-30 18:03:13 -0700
commit8e30524dcc0d0ac1a18a5cee482b9d9cde3cb332 (patch)
treead5e19dfd62d9ebf0e4ce61b6947e53df1bc4d00 /arch/x86/kernel/acpi
parente6459606b04e6385ccd3c2060fc10f78a92c7700 (diff)
x86, acpi: Introduce x86 arch specific arch_reserve_mem_area() for e820 handling
This is needed for ACPI table overriding via initrd. Beside reserving memblocks, X86 also requires to flag the memory area to E820_RESERVED or E820_ACPI in the e820 mappings to be able to io(re)map it later. Signed-off-by: Thomas Renninger <trenn@suse.de> Link: http://lkml.kernel.org/r/1349043837-22659-3-git-send-email-trenn@suse.de Cc: Len Brown <lenb@kernel.org> Cc: Robert Moore <robert.moore@intel.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/acpi')
-rw-r--r--arch/x86/kernel/acpi/boot.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index b2297e58c6ed..6b75777c0a8d 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1700,3 +1700,9 @@ int __acpi_release_global_lock(unsigned int *lock)
} while (unlikely (val != old));
return old & 0x1;
}
+
+void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
+{
+ e820_add_region(addr, size, E820_ACPI);
+ update_e820();
+}