The purpose of this series is to allow booting an OP-TEE image from
SPL, by corectly configuring the TrustZone (TZC) memory regions.
Although TZC400 is a generic silicon logic that could apply to other
mach- families, support is currently restricted to stm32mp. I have
neither a feasible way nor interest in validating this for other
chips. It's fairly trivial to move the code from mach- to arch/,
should another use case arise.
The configuration of the memory regions is devicetree-driven, so there
isn't much to hardcode, However the delineation between OP-TEE secure
memory and shared memory is not given in the devicetree. This is the
one thing that has to be hardcoded.
Changes since v3:
- Pass a "phys_size_t *" to ofnode_get_addr_size() to resolve warning
- s/u-boot,dm-pre-reloc/u-boot,dm-spl/ in devicetree for clarity
Changes since v2:
- Use ram_get_info() instead of ofnode_read("st,mem-size")
- Only hardcode shared memory size instead of TZDRAM size
- Use log_info() instead of pr_info()
Changes since v1:
- Removed "Weak functions are stupid" comment
- Addressed blank line complaints from checkpatch
Alexandru Gagniuc (5):
spl: mmc: Support OP-TEE payloads in Falcon mode
spl: Introduce spl_board_prepare_for_optee() hook
arm: stm32mp: Implement support for TZC 400 controller
stm32mp1: spl: Configure TrustZone controller for OP-TEE
ARM: dts: stm32mp: Add OP-TEE reserved memory to SPL dtb
arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi | 3 +
arch/arm/mach-stm32mp/Makefile | 1 +
arch/arm/mach-stm32mp/include/mach/tzc.h | 33 ++++++
arch/arm/mach-stm32mp/spl.c | 92 +++++++++++++++
arch/arm/mach-stm32mp/tzc400.c | 136 +++++++++++++++++++++++
common/spl/spl.c | 5 +
common/spl/spl_mmc.c | 6 +-
include/spl.h | 14 +++
8 files changed, 288 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/mach-stm32mp/include/mach/tzc.h
create mode 100644 arch/arm/mach-stm32mp/tzc400.c
--
2.31.1
