docs: warp7: Update WaRP7 description for TBB

This patch updates the WaRP7 build descriptions for booting WaRP7 in
Trusted Board Boot mode. TBB is the only mode we really intend to support
for this board so rather than maintain documentation for the old way of
doing it, this patch updates the description for TBB mode only.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

docs/plat/warp7.rst

@@ -31,36 +31,84 @@ https://git.linaro.org/landing-teams/working/mbl/u-boot.git
     make warp7_bl33_defconfig;
     make u-boot.imx arch=ARM CROSS_COMPILE=arm-linux-gnueabihf-
 
-## TF-A:
+## OP-TEE:
 
-https://github.com/ARM-software/arm-trusted-firmware.git
+https://github.com/OP-TEE/optee_os.git
 
 .. code:: shell
 
-    make CROSS_COMPILE=arm-linux-gnueabihf- PLAT=warp7 ARCH=aarch32 ARM_ARCH_MAJOR=7 ARM_CORTEX_A7=yes AARCH32_SP=optee all
-    /path/to/u-boot/tools/mkimage -n /path/to/u-boot/u-boot.cfgout -T imximage -e 0x9df00000 -d ./build/warp7/debug/bl2.bin ./build/warp7/debug/bl2.bin.imx
+    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- PLATFORM=imx PLATFORM_FLAVOR=mx7swarp7 ARCH=arm CFG_PAGEABLE_ADDR=0 CFG_DT_ADDR=0x83000000 CFG_NS_ENTRY_ADDR=0x87800000
 
-## OP-TEE:
+## TF-A:
 
-https://github.com/OP-TEE/optee_os.git
+https://github.com/ARM-software/arm-trusted-firmware.git
 
-.. code:: shell
+The following commands assume that a directory exits in the top-level TFA build
+directory "fiptool_images". "fiptool_images" contains
 
-    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- PLATFORM=imx PLATFORM_FLAVOR=mx7swarp7 ARCH=arm CFG_PAGEABLE_ADDR=0 CFG_DT_ADDR=0x83000000 CFG_NS_ENTRY_ADDR=0x87800000
+- u-boot.bin
+  The binary output from the u-boot instructions above
 
+- tee-header_v2.bin
+- tee-pager_v2.bin
+- tee-pageable_v2.bin
+  Binary outputs from the previous OPTEE build steps
 
-## FIP:
+It is also assumed copy of mbedtls is available on the path path ../mbedtls
+  https://github.com/ARMmbed/mbedtls.git
+  At the time of writing HEAD points to 0592ea772aee48ca1e6d9eb84eca8e143033d973
 
 .. code:: shell
 
     mkdir fiptool_images
-    cp /path/to/uboot/u-boot.bin fiptool_images
     cp /path/to/optee/out/arm-plat-imx/core/tee-header_v2.bin fiptool_images
     cp /path/to/optee/out/arm-plat-imx/core/tee-pager_v2.bin fiptool_images
     cp /path/to/optee/out/arm-plat-imx/core/tee-pageable_v2.bin fiptool_images
+
+    make CROSS_COMPILE=${CROSS_COMPILE} PLAT=warp7 ARCH=aarch32 ARM_ARCH_MAJOR=7 \
+         ARM_CORTEX_A7=yes AARCH32_SP=optee PLAT_WARP7_UART=1 GENERATE_COT=1 \
+         TRUSTED_BOARD_BOOT=1 USE_TBBR_DEFS=1 MBEDTLS_DIR=../mbedtls \
+         NEED_BL32=yes BL32=fiptool_images/tee-header_v2.bin \
+         BL32_EXTRA1=fiptool_images/tee-pager_v2.bin \
+         BL32_EXTRA2=fiptool_images/tee-pageable_v2.bin \
+         BL33=fiptool_images/u-boot.bin certificates all
+
+    /path/to/u-boot/tools/mkimage -n /path/to/u-boot/u-boot.cfgout -T imximage -e 0x9df00000 -d ./build/warp7/debug/bl2.bin ./build/warp7/debug/bl2.bin.imx
+
+## FIP:
+
+.. code:: shell
+
+    cp /path/to/uboot/u-boot.bin fiptool_images
     cp /path/to/linux/arch/boot/dts/imx7s-warp.dtb fiptool_images
-    tools/fiptool/fiptool create --tos-fw fiptool_images/tee-header_v2.bin --tos-fw-extra1 fiptool_images/tee-pager_v2.bin --tos-fw-extra2 fiptool_images/tee-pageable_v2.bin --nt-fw fiptool_images/u-boot.bin --hw-config fiptool_images/imx7s-warp.dtb warp7.fip
 
+    tools/cert_create/cert_create -n --rot-key "build/warp7/debug/rot_key.pem" \
+               --tfw-nvctr 0 \
+               --ntfw-nvctr 0 \
+               --trusted-key-cert fiptool_images/trusted-key-cert.key-crt \
+               --tb-fw=build/warp7/debug/bl2.bin \
+               --tb-fw-cert fiptool_images/trusted-boot-fw.key-crt\
+               --tos-fw fiptool_images/tee-header_v2.bin \
+               --tos-fw-cert fiptool_images/tee-header_v2.bin.crt \
+               --tos-fw-key-cert fiptool_images/tee-header_v2.bin.key-crt \
+               --tos-fw-extra1 fiptool_images/tee-pager_v2.bin \
+               --tos-fw-extra2 fiptool_images/tee-pageable_v2.bin \
+               --nt-fw fiptool_images/u-boot.bin \
+               --nt-fw-cert fiptool_images/u-boot.bin.crt \
+               --nt-fw-key-cert fiptool_images/u-boot.bin.key-crt \
+               --hw-config fiptool_images/imx7s-warp.dtb
+
+    tools/fiptool/fiptool create --tos-fw fiptool_images/tee-header_v2.bin \
+              --tos-fw-extra1 fiptool_images/tee-pager_v2.bin \
+              --tos-fw-extra2 fiptool_images/tee-pageable_v2.bin \
+              --nt-fw fiptool_images/u-boot.bin \
+              --hw-config fiptool_images/imx7s-warp.dtb \
+              --tos-fw-cert fiptool_images/tee-header_v2.bin.crt \
+              --tos-fw-key-cert fiptool_images/tee-header_v2.bin.key-crt \
+              --nt-fw-cert fiptool_images/u-boot.bin.crt \
+              --nt-fw-key-cert fiptool_images/u-boot.bin.key-crt \
+              --trusted-key-cert fiptool_images/trusted-key-cert.key-crt \
+              --tb-fw-cert fiptool_images/trusted-boot-fw.key-crt warp7.fip
 
 # Deploy Images