poplar: Add build option for dram size

Signed-off-by: Victor Chong <victor.chong@linaro.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>

plat/hisilicon/poplar/include/platform_def.h

@@ -39,9 +39,20 @@
 #define MAX_IO_HANDLES			(4)
 #define MAX_IO_BLOCK_DEVICES		(2)
 
+/* Memory size options */
+#define POPLAR_DRAM_SIZE_1G	0
+#define POPLAR_DRAM_SIZE_2G	1
+
 /* Memory map related constants */
 #define DDR_BASE			(0x00000000)
+
+#if (POPLAR_DRAM_SIZE_ID == POPLAR_DRAM_SIZE_2G)
+#define DDR_SIZE			(0x80000000)
+#elif (POPLAR_DRAM_SIZE_ID == POPLAR_DRAM_SIZE_1G)
 #define DDR_SIZE			(0x40000000)
+#else
+#error "Currently unsupported POPLAR_DRAM_SIZE_ID value"
+#endif
 
 #define DEVICE_BASE			(0xF0000000)
 #define DEVICE_SIZE			(0x0F000000)

plat/hisilicon/poplar/platform.mk

@@ -15,6 +15,16 @@ else
 endif
 $(eval $(call add_define,POPLAR_TSP_RAM_LOCATION_ID))
 
+POPLAR_DRAM_SIZE ?= two_gig
+ifeq (${POPLAR_DRAM_SIZE}, two_gig)
+  POPLAR_DRAM_SIZE_ID = POPLAR_DRAM_SIZE_2G
+else ifeq (${POPLAR_DRAM_SIZE}, one_gig)
+  POPLAR_DRAM_SIZE_ID = POPLAR_DRAM_SIZE_1G
+else
+  $(error "Currently unsupported POPLAR_DRAM_SIZE value")
+endif
+$(eval $(call add_define,POPLAR_DRAM_SIZE_ID))
+
 POPLAR_RECOVERY		:= 0
 $(eval $(call add_define,POPLAR_RECOVERY))