@@ -1 +1,2 @@
obj-y += lib.o
+obj-y += boot.o
new file mode 100644
@@ -0,0 +1,58 @@
+/*
+ * ARM Specific Low-Level ACPI Boot Support
+ *
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
+ * Copyright (C) 2014, Naresh Bhat <naresh.bhat@linaro.org>
+ * Copyright (C) 2015, Shannon Zhao <shannon.zhao@linaro.org>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <xen/init.h>
+#include <xen/acpi.h>
+
+#include <asm/acpi.h>
+
+/*
+ * acpi_boot_table_init() called from setup_arch(), always.
+ * 1. find RSDP and get its address, and then find XSDT
+ * 2. extract all tables and checksums them all
+ *
+ * return value: (currently ignored)
+ * 0: success
+ * !0: failure
+ *
+ * We can parse ACPI boot-time tables such as FADT, MADT after
+ * this function is called.
+ */
+int __init acpi_boot_table_init(void)
+{
+ int error;
+
+ /* Initialize the ACPI boot-time table parser. */
+ error = acpi_table_init();
+ if ( error )
+ {
+ disable_acpi();
+ return error;
+ }
+
+ return 0;
+}
@@ -36,6 +36,7 @@
#include <xen/pfn.h>
#include <xen/vmap.h>
#include <xen/libfdt/libfdt.h>
+#include <xen/acpi.h>
#include <asm/page.h>
#include <asm/current.h>
#include <asm/setup.h>
@@ -755,6 +756,9 @@ void __init start_xen(unsigned long boot_phys_offset,
setup_mm(fdt_paddr, fdt_size);
+ /* Parse the ACPI tables for possible boot-time configuration */
+ acpi_boot_table_init();
+
vm_init();
dt_unflatten_host_device_tree();