Hi everyone,
I'm working with the STM32MP157C-DK2 board and trying to reduce the amount of RAM allocated to OP-TEE, but so far I haven't been successful.
There are 32MiB DDR dedicated for OP-TEE. 30MiB for TZSRAM and 2MiB for SHMEM.
In OP-TEE sources I changed value for CFG_TZDRAM_SIZE to 16 MiB and I'm keeping the value for SHMEM.
In TF-a sources I changed value for DDR_SEC_SIZE to 16MiB.
In Device tree I changed total RAM dedicated for OP-TEE to 18MiB.
But when kernel start I have a fail:
Starting kernel ...
E/TC:0
E/TC:0 Core data-abort at address 0x2fff8762 (translation fault)
E/TC:0 fsr 0x00000207 ttbr0 0x2ffe0000 ttbr1 0x00000000 cidr 0x0
E/TC:0 cpu #0 cpsr 0x600001f3
E/TC:0 r0 0x2fff8762 r4 0x2ffe1f71 r8 0x00000073 r12 0xe0000000
E/TC:0 r1 0x2ffe1f1c r5 0x00000000 r9 0x00000000 sp 0x2ffe1e70
E/TC:0 r2 0x2ffd3355 r6 0x00000000 r10 0x2fff8762 lr 0x2ffcdf77
E/TC:0 r3 0x2fff8762 r7 0x2ffe1f71 r11 0x2ffe1f58 pc 0x2ffcd8f8
E/TC:0 TEE load address @ 0x2ffc0000
E/TC:0 Call stack:
E/TC:0 0x2ffcd8f8
E/TC:0 0x2ffcdf77
E/TC:0 Panic 'abort outside thread context' at core/arch/arm/kernel/abort.c:545 <abort_handler>
E/TC:0 TEE load address @ 0x2ffc0000
E/TC:0 Call stack:
E/TC:0 0x2ffc2499
E/TC:0 0x2ffcbb0b
E/TC:0 0x2ffc2101
E/TC:0 0x2ffc0b84
I’d like to ask if it’s actually possible to reduce the size of the reserved RAM for OP-TEE on this board, and if so, what would be the correct approach to do it?
