ti: omap5: Add Kconfig options for secure EMIF reservations

Adds start address and size config options for setting aside
a portion of the EMIF memory space for usage by security software
(like a secure OS/TEE). There are two sizes, a total size and a
protected size. The region is divided into protected (secure) and
unprotected (public) regions, that are contiguous and start at the
start address given. If the start address is zero, the intention
is that the region will be automatically placed at the end of the
available external DRAM space.

Signed-off-by: Daniel Allred <d-allred@ti.com>

diff --git a/arch/arm/cpu/armv7/omap5/Kconfig b/arch/arm/cpu/armv7/omap5/Kconfig
index ef68c53..a947ba4 100644 (file)
--- a/arch/arm/cpu/armv7/omap5/Kconfig
+++ b/arch/arm/cpu/armv7/omap5/Kconfig
@@ -57,6 +57,32 @@ endchoice
 config SYS_SOC
        default "omap5"
 
+config TI_SECURE_EMIF_REGION_START
+       hex "Reserved EMIF region start address"
+       depends on TI_SECURE_DEVICE
+       default 0x0
+       help
+         Reserved EMIF region start address. Set to "0" to auto-select
+         to be at the end of the external memory region.
+
+config TI_SECURE_EMIF_TOTAL_REGION_SIZE
+       hex "Reserved EMIF region size"
+       depends on TI_SECURE_DEVICE
+       default 0x0
+       help
+         Total reserved EMIF region size. Default is 0, which means no reserved EMIF
+         region on secure devices.
+
+config TI_SECURE_EMIF_PROTECTED_REGION_SIZE
+       hex "Size of protected region within reserved EMIF region"
+       depends on TI_SECURE_DEVICE
+       default 0x0
+       help
+         This config option is used to specify the size of the portion of the total
+         reserved EMIF region set aside for secure OS needs that will  be protected
+         using hardware memory firewalls. This value must be smaller than the
+         TI_SECURE_EMIF_TOTAL_REGION_SIZE value.
+
 source "board/compulab/cm_t54/Kconfig"
 source "board/ti/omap5_uevm/Kconfig"
 source "board/ti/dra7xx/Kconfig"