CBMEM: Always build for x86 romstage

Always build CBMEM for romstage, even for boards that will not use it.
We further restrict car_migrate_variables() runs to non-ROMCC boards without
BROKEN_CAR_MIGRATE.

This fixes regression of commit 71b21455 that broke CBMEM console support
for boards with a combination of !EARLY_CBMEM_INIT && !HAVE_ACPI_RESUME.

Change-Id: Ife91d7baebdc9bd1e086896400059a165d3aa90f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7877
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

src/Kconfig

@@ -158,9 +158,7 @@ config EARLY_CBMEM_INIT
 	  romstage.c and should be enabled by the board's Kconfig.
 
 config BROKEN_CAR_MIGRATE
-	bool
+	def_bool !EARLY_CBMEM_INIT
-	default y if !EARLY_CBMEM_INIT && HAVE_ACPI_RESUME
-	default n
 	help
 	  Many boards use CAR_GLOBAL but have no EARLY_CBMEM_INIT and
 	  manage CAR migration on S3 resume path only. Couple boards use

src/arch/x86/boot/Makefile.inc

@@ -1,8 +1,7 @@
 
 ifeq ($(CONFIG_ARCH_ROMSTAGE_X86_32),y)
 
-romstage-$(CONFIG_EARLY_CBMEM_INIT) += cbmem.c
+romstage-y += cbmem.c
-romstage-$(CONFIG_BROKEN_CAR_MIGRATE) += cbmem.c
 
 endif # CONFIG_ARCH_ROMSTAGE_X86_32
 

src/arch/x86/include/arch/early_variables.h

@@ -45,16 +45,18 @@ void *car_get_var_ptr(void *var);
 #define car_set_var(var, val) \
 	do { car_get_var(var) = (val); } while(0)
 
-/* Migrate the CAR variables to memory. */
-void car_migrate_variables(void);
-
 #else
 #define CAR_MIGRATE(migrate_fn_)
 static inline void *car_get_var_ptr(void *var) { return var; }
 #define car_get_var(var) (var)
 #define car_set_var(var, val) do { (var) = (val); } while (0)
+#endif
+
+#if defined(__PRE_RAM__) && IS_ENABLED(CONFIG_CACHE_AS_RAM)
+/* Migrate the CAR variables to memory. */
+void car_migrate_variables(void);
+#else
 static inline void car_migrate_variables(void) { }
 #endif
 
-
 #endif

src/cpu/x86/Makefile.inc

@@ -1,6 +1,5 @@
 ifeq ($(CONFIG_ARCH_ROMSTAGE_X86_32),y)
-romstage-$(CONFIG_EARLY_CBMEM_INIT) += car.c
+romstage-$(CONFIG_CACHE_AS_RAM) += car.c
-romstage-$(CONFIG_BROKEN_CAR_MIGRATE) += car.c
 endif
 
 subdirs-$(CONFIG_PARALLEL_MP) += name

src/cpu/x86/car.c

@@ -73,7 +73,7 @@ void *car_get_var_ptr(void *var)
 	return &migrated_base[offset];
 }
 
-void car_migrate_variables(void)
+static void do_car_migrate_variables(void)
 {
 	void *migrated_base;
 	car_migration_func_t *migrate_func;
@@ -102,3 +102,9 @@ void car_migrate_variables(void)
 		migrate_func++;
 	}
 }
+
+void car_migrate_variables(void)
+{
+	if (!IS_ENABLED(CONFIG_BROKEN_CAR_MIGRATE))
+		do_car_migrate_variables();
+}

src/lib/Makefile.inc

@@ -75,8 +75,7 @@ ramstage-y += dynamic_cbmem.c
 romstage-y += dynamic_cbmem.c
 else
 ramstage-y += cbmem.c
-romstage-$(CONFIG_EARLY_CBMEM_INIT) += cbmem.c
+romstage-y += cbmem.c
-romstage-$(CONFIG_BROKEN_CAR_MIGRATE) += cbmem.c
 endif # CONFIG_DYNAMIC_CBMEM
 ramstage-y += cbmem_info.c