ACPI S3 support: Add acpi_s3_resume_allowed()

Add this to reduce the amount of preprocessor conditionals used in the source,
compiler currently resolves this to a constant.

Once we have gone through all #if CONFIG_HAVE_ACPI_RESUME cases, we may change
the implementation to enable/disable S3 support runtime.

Change-Id: I0e2d9f81e2ab87c2376a04fab38a7c951cac7a07
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/6060
Tested-by: build bot (Jenkins)

src/arch/x86/boot/acpi.c

@@ -756,17 +756,17 @@ extern unsigned int __wakeup_size;
 
 void acpi_jump_to_wakeup(void *vector)
 {
-#if CONFIG_RELOCATABLE_RAMSTAGE
 	u32 acpi_backup_memory = 0;
-#else
-	u32 acpi_backup_memory = (u32)cbmem_find(CBMEM_ID_RESUME);
+
+	if (HIGH_MEMORY_SAVE && acpi_s3_resume_allowed()) {
+		acpi_backup_memory = (u32)cbmem_find(CBMEM_ID_RESUME);
 
 		if (!acpi_backup_memory) {
 			printk(BIOS_WARNING, "ACPI: Backup memory missing. "
 				"No S3 resume.\n");
 			return;
 		}
-#endif
+	}
 
 #if CONFIG_SMP
 	// FIXME: This should go into the ACPI backup memory, too. No pork sausages.

src/arch/x86/boot/tables.c

@@ -192,19 +192,15 @@ void write_tables(void)
 
 	post_code(0x9e);
 
-#if CONFIG_HAVE_ACPI_RESUME
-/* Only add CBMEM_ID_RESUME when the ramstage isn't relocatable. */
-#if !CONFIG_RELOCATABLE_RAMSTAGE
 	/* Let's prepare the ACPI S3 Resume area now already, so we can rely on
 	 * it begin there during reboot time. We don't need the pointer, nor
 	 * the result right now. If it fails, ACPI resume will be disabled.
 	 */
+	if (HIGH_MEMORY_SAVE && acpi_s3_resume_allowed())
 		cbmem_add(CBMEM_ID_RESUME, HIGH_MEMORY_SAVE);
-#endif
-#if CONFIG_NORTHBRIDGE_AMD_AGESA_FAMILY14 || CONFIG_NORTHBRIDGE_AMD_AGESA_FAMILY15_TN || CONFIG_NORTHBRIDGE_AMD_AGESA_FAMILY16_KB
-	cbmem_add(CBMEM_ID_RESUME_SCRATCH, CONFIG_HIGH_SCRATCH_MEMORY_SIZE);
-#endif
-#endif
+
+	if (HIGH_MEMORY_SCRATCH && acpi_s3_resume_allowed())
+		cbmem_add(CBMEM_ID_RESUME_SCRATCH, HIGH_MEMORY_SCRATCH);
 
 #define MAX_COREBOOT_TABLE_SIZE (32 * 1024)
 	post_code(0x9d);

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

@@ -584,4 +584,9 @@ void generate_cpu_entries(void);
 
 #endif	/* CONFIG_GENERATE_ACPI_TABLES */
 
+static inline int acpi_s3_resume_allowed(void)
+{
+	return IS_ENABLED(CONFIG_HAVE_ACPI_RESUME);
+}
+
 #endif  /* __ASM_ACPI_H */

src/include/cbmem.h

@@ -21,11 +21,18 @@
 #ifndef _CBMEM_H_
 #define _CBMEM_H_
 
-#if CONFIG_HAVE_ACPI_RESUME
-#if CONFIG_RELOCATABLE_RAMSTAGE
-#define HIGH_MEMORY_SAVE	0
-#else
+#if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME) && \
+	! IS_ENABLED(CONFIG_RELOCATABLE_RAMSTAGE)
 #define HIGH_MEMORY_SAVE	(CONFIG_RAMTOP - CONFIG_RAMBASE)
+#else
+#define HIGH_MEMORY_SAVE	0
+#endif
+
+#if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME) && \
+	IS_ENABLED(CONFIG_HIGH_SCRATCH_MEMORY_SIZE)
+#define HIGH_MEMORY_SCRATCH	CONFIG_HIGH_SCRATCH_MEMORY_SIZE
+#else
+#define HIGH_MEMORY_SCRATCH	0
 #endif
 
 /* Delegation of resume backup memory so we don't have to
@@ -33,7 +40,6 @@
  */
 #define CBMEM_BOOT_MODE		0x610
 #define CBMEM_RESUME_BACKUP	0x614
-#endif /* CONFIG_HAVE_ACPI_RESUME */
 
 #define CBMEM_ID_FREESPACE	0x46524545
 #define CBMEM_ID_GDT		0x4c474454
@@ -133,14 +139,9 @@ u64 cbmem_entry_size(const struct cbmem_entry *entry);
  */
 #define _CBMEM_SZ_MINIMAL	( 128 * 1024 )
 
-#if CONFIG_HAVE_ACPI_RESUME
-#define _CBMEM_SZ_RESUME	(HIGH_MEMORY_SAVE + CONFIG_HIGH_SCRATCH_MEMORY_SIZE)
-#else
-#define _CBMEM_SZ_RESUME	0
-#endif
-
 #define _CBMEM_SZ_TOTAL	\
-	(_CBMEM_SZ_MINIMAL + _CBMEM_SZ_RESUME + CONFIG_CONSOLE_CBMEM_BUFFER_SIZE)
+	(_CBMEM_SZ_MINIMAL + CONFIG_CONSOLE_CBMEM_BUFFER_SIZE + \
+	HIGH_MEMORY_SAVE + HIGH_MEMORY_SCRATCH)
 
 #define HIGH_MEMORY_SIZE	ALIGN_UP(_CBMEM_SZ_TOTAL, 0x10000)