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We are using an arm ARCH-64 (A55) and we need to do some floating point math in BL2. It seems this is not enabled. Is there a reason why I cannot do FP math (security issue?) and if I can, how do I enable it?
I am seeing this error when I use floats "-mgeneral-regs-only"
thanks
hi,
I has quality engineer from china.
I would to start study the Arm profile-A trustedfirmware and try to test it.
I has read trustedfirmware documetion ,
From the Processes & policies Chap about CI part. "https://trustedfirmware-a.readthedocs.io/en/latest/process/contributing.htm… "
Find ATF has Coverity Scan and test image build.
but I would to know, trustedfirmware-a whether has unit test part in the code level quality check.
Brs
Tony
Hi,
We use mainline TF-A and have problems using the HAB API in the
U-Boot. We see for example that the hab_auth_img command fails in the
mainline U-Boot. If we switch to the downstream NXP TF-A it works. Is
this to be expected?
--
Heiko
Hi
Arguments between the BL1 and BL2 is overlap by zeromem when BL2 start.
1. BL2 save r3 to r12
arm-trusted-firmware/bl2/aarch32/bl2_entrypoint.S
/*---------------------------------------------
* Save arguments x0 - x3 from BL1 for future
* use.
* ---------------------------------------------
*/
mov r9, r0
mov r10, r1
mov r11, r2
mov r12, r3
2. BL2 call zeromem to clear bss
arm-trusted-firmware/bl2/aarch32/bl2_entrypoint.S
ldr r0, =__BSS_START__
ldr r1, =__BSS_END__
sub r1, r1, r0
bl zeromem
arm-trusted-firmware/lib/aarch32/misc_helpers.S
tmp .req r12 /* Temporary scratch register */
r12 used as scratch register
3. r3 restore from r12
arm-trusted-firmware/bl2/aarch32/bl2_entrypoint.S
mov r0, r9
mov r1, r10
mov r2, r11
mov r3, r12
I can try to save it in other registers, but can not guarantee that the
register will not be damaged. Is there any better way to deal with this
problem?
Thanks.