src/lib: Enable display of cbmem during romstage and postcar

Enable the display of cbmem during romstage and postcar.  Add a Kconfig
value to prevent coreboot images from increasing in size when this
feature is not in use.

TEST=Build and run on Galileo Gen2

Change-Id: Ib70ad517ebf7d37a7f46ba503b4432c7c04d7ded
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/15842
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/Kconfig

@@ -209,6 +209,12 @@ config NO_XIP_EARLY_STAGES
 config EARLY_CBMEM_INIT
 	def_bool !LATE_CBMEM_INIT
 
+config EARLY_CBMEM_LIST
+	bool
+	default n
+	help
+	  Enable display of CBMEM during romstage and postcar.
+
 config COLLECT_TIMESTAMPS
 	bool "Create a table of timestamps collected during boot"
 	default n

src/lib/imd_cbmem.c

@@ -279,7 +279,8 @@ void cbmem_add_bootmem(void)
 	bootmem_add_range(base, size, LB_MEM_TABLE);
 }
 
-#if ENV_RAMSTAGE
+#if ENV_RAMSTAGE || (IS_ENABLED(CONFIG_EARLY_CBMEM_LIST) \
+	&& (ENV_POSTCAR || ENV_ROMSTAGE))
 /*
  * -fdata-sections doesn't work so well on read only strings. They all
  * get put in the same section even though those strings may never be
@@ -288,8 +289,11 @@ void cbmem_add_bootmem(void)
 void cbmem_list(void)
 {
 	static const struct imd_lookup lookup[] = { CBMEM_ID_TO_NAME_TABLE };
+	struct imd *imd;
+	struct imd imd_backing;
 
-	imd_print_entries(cbmem_get_imd(), lookup, ARRAY_SIZE(lookup));
+	imd = imd_init_backing_with_recover(&imd_backing);
+	imd_print_entries(imd, lookup, ARRAY_SIZE(lookup));
 }
 #endif