[U-Boot] [PATCH 4/5] ti_omap5_common: mark region of DRAM protected on HS parts

Daniel Allred
2016-09-02T05:40:23Z

If the ending portion of the DRAM is reserved for secure
world use, then u-boot cannot use this memory for its relocation
purposes. To prevent issues, we mark this memory as PRAM and this
prevents it from being used by u-boot at all.

Signed-off-by: Daniel Allred <d-allred@ti.com>
---
include/configs/ti_omap5_common.h | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/include/configs/ti_omap5_common.h b/include/configs/ti_omap5_common.h
index e42c88e..70fdc6e 100644
--- a/include/configs/ti_omap5_common.h
+++ b/include/configs/ti_omap5_common.h
@@ -146,6 +146,14 @@
*/
#define TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ 0x1000
#define CONFIG_SPL_TEXT_BASE 0x40301350
+/* If no specific start address is specified then the secure EMIF
+ * region will be placed at the end of the DDR space. In order to prevent
+ * the main u-boot relocation from clobbering that memory and causing a
+ * firewall violation, we tell u-boot that memory is protected RAM (PRAM)
+ */
+#if (CONFIG_TI_SECURE_EMIF_REGION_START == 0)
+#define CONFIG_PRAM (CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE) >> 10
+#endif
#else
/*
* For all booting on GP parts, the flash loader image is
--
2.7.4