rockchip: make sure sdram top does not spill into MMIO space

The base address of MMIO space is different for different Rockchip
SOCs. Define them in the appropriate address map files and use the
definition in common code.

BRANCH=none
BUG=chrome-os-partner:51537
TEST=emerge-kevin coreboot

Change-Id: I615f3cadd6d5d994b7dd1defbd10d02ad5c994da
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 24f941e960e4a2cfb9fc26415f56e240de3d00d9
Original-Change-Id: Ia48d75e7de546b17636cde7829ee09837b9d7ac9
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/337190
Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/14717
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/soc/rockchip/common/cbmem.c

@@ -14,11 +14,13 @@
  */
 
 #include <cbmem.h>
-#include <stddef.h>
+#include <soc/addressmap.h>
-#include <symbols.h>
 #include <soc/sdram.h>
+#include <stdlib.h>
+#include <symbols.h>
 
 void *cbmem_top(void)
 {
-	return _dram + sdram_size_mb()*MiB;
+	return (void *)min((uintptr_t)_dram + sdram_size_mb() * MiB,
+			   MAX_DRAM_ADDRESS);
 }

src/soc/rockchip/rk3288/include/soc/addressmap.h

@@ -16,6 +16,8 @@
 #ifndef __SOC_ROCKCHIP_RK3288_ADDRESSMAP_H__
 #define __SOC_ROCKCHIP_RK3288_ADDRESSMAP_H__
 
+#define MAX_DRAM_ADDRESS	0xFE000000
+
 #define SDMMC1_BASE		0xFF0C0000
 #define SDMMC0_BASE		0xFF0D0000
 #define EMMC_BASE		0xFF0F0000

src/soc/rockchip/rk3399/include/soc/addressmap.h

@@ -16,6 +16,8 @@
 #ifndef __SOC_ROCKCHIP_RK3399_ADDRESSMAP_H__
 #define __SOC_ROCKCHIP_RK3399_ADDRESSMAP_H__
 
+#define MAX_DRAM_ADDRESS	0xF8000000
+
 #define PMUGRF_BASE		0xff320000
 #define PMUSGRF_BASE		0xff330000
 #define PMUCRU_BASE		0xff750000

src/soc/rockchip/rk3399/romstage.c

@@ -25,10 +25,12 @@
 #include <program_loading.h>
 #include <romstage_handoff.h>
 #include <symbols.h>
+#include <soc/addressmap.h>
 #include <soc/mmu_operations.h>
 #include <soc/sdram.h>
 
-static const uint64_t dram_size = (uint64_t)CONFIG_DRAM_SIZE_MB * MiB;
+static const uint64_t dram_size =
+	(uint64_t)min((uint64_t)CONFIG_DRAM_SIZE_MB * MiB, MAX_DRAM_ADDRESS);
 
 void main(void)
 {

src/soc/rockchip/rk3399/soc.c

@@ -13,18 +13,19 @@
  * GNU General Public License for more details.
  */
 
-#include <cpu/cpu.h>
 #include <console/console.h>
+#include <cpu/cpu.h>
 #include <device/device.h>
-#include <stdlib.h>
+#include <soc/addressmap.h>
 #include <stddef.h>
+#include <stdlib.h>
 #include <string.h>
 #include <symbols.h>
 
 static void soc_read_resources(device_t dev)
 {
 	ram_resource(dev, 0, (uintptr_t)_dram / KiB,
-		     CONFIG_DRAM_SIZE_MB * KiB);
+		     min(CONFIG_DRAM_SIZE_MB * KiB, MAX_DRAM_ADDRESS / KiB));
 }
 
 static void soc_init(device_t dev)