ACPI S3: Add common recovery code

There is nothing to backup with RELOCATABLE_RAMSTAGE.

Change-Id: I780a71e48d23e202fb0e9c70e34420066fa0e5b5
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15243
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/arch/x86/Makefile.inc

@@ -331,6 +331,7 @@ ifeq ($(CONFIG_ARCH_ROMSTAGE_X86_32)$(CONFIG_ARCH_ROMSTAGE_X86_64),y)
 romstage-$(CONFIG_POSTCAR_STAGE) += postcar_loader.c
 romstage-y += cbmem.c
 romstage-y += boot.c
+romstage-$(CONFIG_HAVE_ACPI_RESUME) += acpi_s3.c
 
 romstage-y += cbfs_and_run.c
 romstage-$(CONFIG_ARCH_RAMSTAGE_X86_32) += cpu_common.c

src/arch/x86/acpi_s3.c

@@ -22,6 +22,8 @@
 #include <romstage_handoff.h>
 #include <rules.h>
 
+#if ENV_RAMSTAGE
+
 /* This is filled with acpi_is_wakeup() call early in ramstage. */
 int acpi_slp_type = -1;
 
@@ -75,6 +77,19 @@ void acpi_fail_wakeup(void)
 	if (acpi_slp_type == 3 || acpi_slp_type == 2)
 		acpi_slp_type = 0;
 }
+#endif /* ENV_RAMSTAGE */
+
+void acpi_prepare_for_resume(void)
+{
+	if (!HIGH_MEMORY_SAVE)
+		return;
+
+	/* Back up the OS-controlled memory where ramstage will be loaded. */
+	void *src = (void *)CONFIG_RAMBASE;
+	void *dest = cbmem_find(CBMEM_ID_RESUME);
+	if (dest != NULL)
+		memcpy(dest, src, HIGH_MEMORY_SAVE);
+}
 
 void acpi_prepare_resume_backup(void)
 {

src/arch/x86/include/arch/acpi.h

@@ -636,12 +636,14 @@ int acpi_is_wakeup(void);
 int acpi_is_wakeup_s3(void);
 int acpi_is_wakeup_s4(void);
 #endif
+void acpi_prepare_for_resume(void);
 
 #else
 #define acpi_slp_type 0
 static inline int acpi_is_wakeup(void) { return 0; }
 static inline int acpi_is_wakeup_s3(void) { return 0; }
 static inline int acpi_is_wakeup_s4(void) { return 0; }
+static inline void acpi_prepare_for_resume(void) { }
 #endif
 
 static inline uintptr_t acpi_align_current(uintptr_t current)

src/cpu/intel/haswell/romstage.c

@@ -273,29 +273,14 @@ void romstage_common(const struct romstage_params *params)
 	}
 }
 
-static inline void prepare_for_resume(struct romstage_handoff *handoff)
-{
-/* Only need to save memory when ramstage isn't relocatable. */
-#if !CONFIG_RELOCATABLE_RAMSTAGE
-#if CONFIG_HAVE_ACPI_RESUME
-	/* Back up the OS-controlled memory where ramstage will be loaded. */
-	if (handoff != NULL && handoff->s3_resume) {
-		void *src = (void *)CONFIG_RAMBASE;
-		void *dest = cbmem_find(CBMEM_ID_RESUME);
-		if (dest != NULL)
-			memcpy(dest, src, HIGH_MEMORY_SAVE);
-	}
-#endif
-#endif
-}
-
 void romstage_after_car(void)
 {
 	struct romstage_handoff *handoff;
 
 	handoff = romstage_handoff_find_or_add();
 
-	prepare_for_resume(handoff);
+	if (handoff != NULL && handoff->s3_resume)
+		acpi_prepare_for_resume();
 
 	/* Load the ramstage. */
 	copy_and_run();