x86: Store and display previous sleep state
Add one member in the global data to store previous sleep state,
and display the state during boot in print_cpuinfo().
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Stefan Roese <sr@denx.de>
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c
index 8fa6953..7222ec8 100644
--- a/arch/x86/cpu/cpu.c
+++ b/arch/x86/cpu/cpu.c
@@ -25,6 +25,7 @@
#include <errno.h>
#include <malloc.h>
#include <syscon.h>
+#include <asm/acpi_s3.h>
#include <asm/control_regs.h>
#include <asm/coreboot_tables.h>
#include <asm/cpu.h>
@@ -179,6 +180,11 @@
cpu_has_64bit() ? "x86_64" : "x86",
cpu_vendor_name(gd->arch.x86_vendor), gd->arch.x86_device);
+#ifdef CONFIG_HAVE_ACPI_RESUME
+ debug("ACPI previous sleep state: %s\n",
+ acpi_ss_string(gd->arch.prev_sleep_state));
+#endif
+
return 0;
}