[U-Boot] [PATCH 3/5] ARM: DRA7: Add secure emif setup calls

Daniel Allred
2016-09-02T05:40:22Z

After EMIF DRAM is configured, but before it is used,
calls are made on secure devices to reserve any configured
memory region needed by the secure world and then to lock the
EMIF firewall configuration. If any other firewall
configuration needs to be applied, it must happen before the
lock call.

Signed-off-by: Daniel Allred <d-allred@ti.com>
---
arch/arm/cpu/armv7/omap-common/emif-common.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c
index 2b79010..b26984e 100644
--- a/arch/arm/cpu/armv7/omap-common/emif-common.c
+++ b/arch/arm/cpu/armv7/omap-common/emif-common.c
@@ -14,6 +14,7 @@
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <asm/omap_common.h>
+#include <asm/omap_sec_common.h>
#include <asm/utils.h>
#include <linux/compiler.h>

@@ -1477,6 +1478,20 @@ void sdram_init(void)
debug("get_ram_size() successful");
}

+#if defined(CONFIG_TI_SECURE_DEVICE)
+ /*
+ * On HS devices, do static EMIF firewall configuration
+ * but only do it if not already running in SDRAM
+ */
+ if (!in_sdram)
+ if (0 != secure_emif_reserve())
+ hang();
+
+ /* On HS devices, ensure static EMIF firewall APIs are locked */
+ if (0 != secure_emif_firewall_lock())
+ hang();
+#endif
+
if (sdram_type == EMIF_SDRAM_TYPE_DDR3 &&
(!in_sdram && !warm_reset()) && (!is_dra7xx())) {
if (emif1_enabled)
--
2.7.4