#
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# Copyright (c) 2020, Rockchip Electronics Co., Ltd.
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# Written by Elon Zhang <zhangzj@rock-chips.com>
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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OP-TEE Client in U-Boot
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==========================
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OP-TEE Client in U-Boot is responsible for communication managerment
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between Secure World(OP-TEE) and Non-Secure World(U-Boot).
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Change Log
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==========================
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2020.8 Update OP-TEE message protocol
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OP-TEE message protocol is updated from version 1 to version 2
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on platform RK312x/RK322x/RK3288/RK3399/RK3399Pro/RK3368/RK3328/RK3228H.
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This message protocol update involves some software component, including
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OP-TEE(trust.img), U-Boot, Kernel, binary&library in Android/Linux.
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The software component above **MUST** be consistent because OP-TEE message
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protocol v1 and v2 are not compatible, otherwise TEE related function
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will **NOT** work normally.
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One Very Important Change:
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MMU policy for share memory between REE and TEE
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+-------+-----------------+----------------+
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| arch | before update | after update |
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+-------+-----------------+----------------+
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| arm64 | dcache enabled | dcache enabled |
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+-------+-----------------+----------------+
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| arm | dcache disabled | dcache enabled |
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+-------+-----------------+----------------+
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Related commits are shown below:
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1. rkbin
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c20711e rk3036: tee: update optee version to v2.00
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cb7d8f9 rk322x: tee with ta: update optee version to v2.11
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4f9488e rk3128x: tee with ta: update optee version to v2.11
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6d6473c rk312x: tee with ta: update optee version to v2.01
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c0b025b rk3288: tee with ta: update optee version to v2.01
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664ccee rk3228h/rk3328: bl32: update version to 2.01
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6334115 rk3368: bl32: update version to 2.01
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ccf1bef rk3399pro: bl32: update version to 2.01
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8c01e53 rk3399: bl32: update version to 2.01
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2. uboot
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7a349fdcbd lib: optee_client: add optee initialize flag
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74eb602743 lib: optee_client: update to new optee msg for optee v1 platform
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102dfafc4a rochchip: board: map op-tee memory as dcache enabled
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396e3049bd rochchip: board: only map op-tee share memory as dcache enabled
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3. kernel
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1) 4.19
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90928381ffa9 ARM: dts: rockchip: add firmware and optee node
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d752a21c0853 arm64: dts: rockchip: add firmware and optee node
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c31ab35ad86d ARM: rockchip_defconfig: enable CONFIG_TEE and CONFIG_OPTEE
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4. Android
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1) Android 10
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repo: android/rk/platform/vendor/rockchip/common
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a515160d optee: v1 rebuild ca/ta to support new OP-TEE MSG
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4fc68259 optee v1: arm&arm64: update tee-supplicant and libteec.so
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a515160d optee: v1 rebuild ca/ta to support new OP-TEE MSG
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repo: android/rk/hardware/rk29/weaver
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26c9dd9b rebuild libRkTeeWeaver.v1.so for new OP-TEE MSG
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5. Linux
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repo: linux/security/bin
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f59085c optee_v1: lib: arm&arm64: update binary and library
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