[U-Boot] [PATCH v2 18/28] x86: acpi: Align FACS table to a 64 byte boundary

[Bin Meng]

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 at gmail.com>
Reviewed-by: Stefan Roese <sr at denx.de>
Tested-by: Stefan Roese <sr at denx.de>

---

Changes in v2:
- Add comments before the 64 byte alignment for FACS

 arch/x86/lib/acpi_table.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index 7cde9c8..056d012 100644
--- 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);
-- 
1.8.2.1