recipes-bsp: Add trusted-firmware-a support for RB3Gen2

Add RB3Gen2 platform specific support leveraging base trusted-firmware-a
recipes from meta-arm. It allows to generate unsigned bl2.elf and test signed
fip.elf as per TF-A documentation here [1].

[1] https://github.com/qualcomm-linux/trusted-firmware-a/blob/qcom-next/docs/plat/qti/rb3gen2.rst

Signed-off-by: Sumit Garg <[email protected]>

Author: b49020

recipes-bsp/trusted-firmware-a/trusted-firmware-a-qcm6490.inc

@@ -0,0 +1,5 @@
+# RB3Gen2 specific TFA support
+
+COMPATIBLE_MACHINE = "qcm6490"
+TFA_PLATFORM = "rb3gen2"
+TFA_BUILD_TARGET = "bl2 fip"

recipes-bsp/trusted-firmware-a/trusted-firmware-a_%.bbappend

@@ -0,0 +1,22 @@
+SRCBRANCH = "qcom-next"
+SRC_URI = "git://github.com/qualcomm-linux/trusted-firmware-a.git;protocol=https;name=tfa;branch=${SRCBRANCH}"
+SRCREV_tfa = "164d443c8e92c18fd2cca03661dd1a2b9ac37848"
+LIC_FILES_CHKSUM = "file://docs/license.rst;md5=6ed7bace7b0bc63021c6eba7b524039e"
+
+DEPENDS += "qtestsign-native"
+
+MACHINE_TFA_REQUIRE ?= ""
+MACHINE_TFA_REQUIRE:qcm6490 = "trusted-firmware-a-qcm6490.inc"
+
+require ${MACHINE_TFA_REQUIRE}
+
+do_install:append:qcm6490() {
+    export CRYPTOGRAPHY_OPENSSL_NO_LEGACY=1
+
+    ${OBJCOPY} -I binary -B aarch64 -O elf64-littleaarch64 ${D}/firmware/fip.bin ${D}/firmware/fip.o
+    ${LD} ${D}/firmware/fip.o -o ${D}/firmware/fip_unsigned.elf -EL -T ${S}/tools/qti/fip-elf.lds --defsym=ELFENTRY=0x9fc00000 -Ttext=0x9fc00000
+    rm -f ${D}/firmware/fip.o
+
+    qtestsign -v6 aboot -o ${D}/firmware/fip.elf ${D}/firmware/fip_unsigned.elf
+    rm -f ${D}/firmware/fip_unsigned.elf
+}