plat-sam: Add support for Atmel-Microchip SAMA5D2-XULT board

Add basic support to get op-tee to run on SAMA5D2-XULT board.

The SoC is based on single core ARM Cortex-A5 and supports:
 ARM TrustZone with support for configuring memory/peripherals as secure
 Secure RTC
 Secure boot
 On-the-fly encryption/decryption of DDR bus
 Tamper protection

Link: http://www.atmel.com/Images/Atmel-11267-32-bit-Cortex-A5-Microcontroller-SAMA5D2_Datasheet.pdf
Signed-off-by: Akshay Bhat <[email protected]>
Acked-by: Jerome Forissier <[email protected]>

.travis.yml

@@ -243,6 +243,9 @@ script:
   - $make PLATFORM=rockchip-rk322x
   - $make PLATFORM=rockchip-rk322x CFG_TEE_CORE_LOG_LEVEL=4 DEBUG=1
 
+  # Atmel ATSAMA5D2-XULT
+  - $make PLATFORM=sam
+
   # Run regression tests (xtest in QEMU)
   - (cd ${HOME}/optee_repo/build && $make check CROSS_COMPILE="ccache arm-linux-gnueabihf-" AARCH32_CROSS_COMPILE=arm-linux-gnueabihf- CFG_TEE_CORE_DEBUG=y DUMP_LOGS_ON_ERROR=1)
 

MAINTAINERS.md

@@ -9,6 +9,7 @@ for these platforms.
 |----------|------------|
 | Allwinner A80 Board			|`Sun Yangbang <[email protected]>`|
 | ARM Juno Board			|`Linaro <[email protected]>`|
+| Atmel ATSAMA5D2-XULT Board		|`Akshay Bhat <[email protected]>`|
 | FSL ls1021a				|`Sumit Garg <[email protected]>`|
 | FSL i.MX6 Quad SABRE Lite Board	|`Yan Yan <[email protected]>`,`Feng Yu <[email protected]>`|
 | FSL i.MX6 Quad SABRE SD Board		|`Yan Yan <[email protected]>`,`Feng Yu <[email protected]>`|

README.md

@@ -46,6 +46,7 @@ platforms have different sub-maintainers, please refer to the file
 |----------|-------------------------|---------------------|
 | [Allwinner A80 Board](http://linux-sunxi.org/A80)|`PLATFORM=sunxi`| No |
 | [ARM Juno Board](http://www.arm.com/products/tools/development-boards/versatile-express/juno-arm-development-platform.php) |`PLATFORM=vexpress-juno`| Yes |
+| [Atmel ATSAMA5D2-XULT Board](http://www.atmel.com/tools/atsama5d2-xult.aspx)|`PLATFORM=sam`| Yes |
 | [FSL ls1021a](http://www.freescale.com/tools/embedded-software-and-tools/hardware-development-tools/tower-development-boards/mcu-and-processor-modules/powerquicc-and-qoriq-modules/qoriq-ls1021a-tower-system-module:TWR-LS1021A?lang_cd=en)|`PLATFORM=ls-ls1021atwr`| Yes |
 | [FSL i.MX6 Quad SABRE Lite Board](https://boundarydevices.com/product/sabre-lite-imx6-sbc/) |`PLATFORM=imx-mx6qsabrelite`| Yes |
 | [FSL i.MX6 Quad SABRE SD Board](http://www.nxp.com/products/software-and-tools/hardware-development-tools/sabre-development-system/sabre-board-for-smart-devices-based-on-the-i.mx-6quad-applications-processors:RD-IMX6Q-SABRE) |`PLATFORM=imx-mx6qsabresd`| Yes |

core/arch/arm/cpu/cortex-a5.mk

@@ -0,0 +1,9 @@
+$(call force,CFG_ARM32_core,y)
+$(call force,CFG_ARM64_core,n)
+$(call force,CFG_WITH_LPAE,n)
+$(call force,CFG_HWSUPP_MEM_PERM_WXN,n)
+$(call force,CFG_HWSUPP_MEM_PERM_PXN,n)
+$(call force,CFG_SECURE_TIME_SOURCE_CNTPCT,n)
+arm32-platform-cpuarch 	:= cortex-a5
+arm32-platform-cflags 	+= -mcpu=$(arm32-platform-cpuarch)
+arm32-platform-aflags 	+= -mcpu=$(arm32-platform-cpuarch)

core/arch/arm/plat-sam/conf.mk

@@ -0,0 +1,17 @@
+PLATFORM_FLAVOR ?= sama5d2xult
+
+include core/arch/arm/cpu/cortex-a5.mk
+core_arm32-platform-aflags	+= -mfpu=neon
+
+$(call force,CFG_GENERIC_BOOT,y)
+$(call force,CFG_ATMEL_UART,y)
+$(call force,CFG_PM_STUBS,y)
+$(call force,CFG_SECURE_TIME_SOURCE_REE,y)
+$(call force,CFG_NO_SMP,y)
+$(call force,CFG_PL310,y)
+$(call force,CFG_PL310_LOCKED,y)
+$(call force,CFG_AT91_MATRIX,y)
+
+ta-targets = ta_arm32
+
+CFG_WITH_STACK_CANARIES ?= y

core/arch/arm/plat-sam/kern.ld.S

@@ -0,0 +1 @@
+#include "../kernel/kern.ld.S"

core/arch/arm/plat-sam/link.mk

@@ -0,0 +1 @@
+include core/arch/arm/kernel/link.mk