x86: acpi: Resume OS if resume vector is found
In an S3 resume path, U-Boot does everything like a cold boot except
in the last_stage_init() it jumps to the OS resume vector.
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/include/asm/acpi_s3.h b/arch/x86/include/asm/acpi_s3.h
index a06466c..b8d14f4 100644
--- a/arch/x86/include/asm/acpi_s3.h
+++ b/arch/x86/include/asm/acpi_s3.h
@@ -99,6 +99,16 @@
*/
void chipset_clear_sleep_state(void);
+/**
+ * acpi_resume() - Do ACPI S3 resume
+ *
+ * This calls U-Boot wake up assembly stub and jumps to OS's wake up vector.
+ *
+ * @wake_vec: OS wake up vector
+ * @return: Never returns
+ */
+void acpi_resume(void *wake_vec);
+
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ACPI_S3_H__ */