[U-Boot] [PATCH 5/8] rockchip: rk3288: reserve first 2MB when build with ATF support

[Heiko Stuebner <heiko@sntech.de>]

ATF resides in the first 2MB of ram and will also protect this
area from non-secure access.

So similar to other Rockchip socs keep this area from the usable ram.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
 arch/arm/mach-rockchip/rk3288/rk3288.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/mach-rockchip/rk3288/rk3288.c b/arch/arm/mach-rockchip/rk3288/rk3288.c
index a725abc5a5..678ab0de65 100644
--- a/arch/arm/mach-rockchip/rk3288/rk3288.c
+++ b/arch/arm/mach-rockchip/rk3288/rk3288.c
@@ -2,11 +2,27 @@
 /*
  * Copyright (c) 2016 Rockchip Electronics Co., Ltd
  */
+#include <common.h>
 #include <asm/io.h>
 #include <asm/arch/hardware.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
 #define GRF_SOC_CON2 0xff77024c
 
+int dram_init_banksize(void)
+{
+#ifdef CONFIG_SPL_ATF
+	size_t max_size = min((unsigned long)gd->ram_size, gd->ram_top);
+
+	/* Reserve 0x200000 for ATF bl32 */
+	gd->bd->bi_dram[0].start = 0x0200000;
+	gd->bd->bi_dram[0].size = max_size - gd->bd->bi_dram[0].start;
+#endif
+
+	return 0;
+}
+
 int arch_cpu_init(void)
 {
 	/* We do some SoC one time setting here. */
-- 
2.20.1