x86: acpi: Align FACS table to a 64 byte boundary

Per ACPI spec, the FACS table address must be aligned to a 64 byte
boundary (Windows checks this, but Linux does not).

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index 7ff6e8c..9cdea93 100644 (file)
--- a/arch/x86/lib/acpi_table.c
+++ b/arch/x86/lib/acpi_table.c
@@ -339,7 +339,11 @@ u32 write_acpi_tables(u32 start)
        current = ALIGN(current, 16);
        xsdt = (struct acpi_xsdt *)current;
        current += sizeof(struct acpi_xsdt);
-       current = ALIGN(current, 16);
+       /*
+        * Per ACPI spec, the FACS table address must be aligned to a 64 byte
+        * boundary (Windows checks this, but Linux does not).
+        */
+       current = ALIGN(current, 64);
 
        /* clear all table memory */
        memset((void *)start, 0, current - start);