With tickless mechanism hsem can be used for quite a long time
(time to set up PLL clock).
Also, if hsem is held to long, then this is not the current core which is faulty,
but probably the other (the one which hold the HSEM)
Add 2 targets for DISCO_H747I dualcore:
* DISCO_H747I -> for CM7 core
* DISCO_H747I_CM4 -> for CM4 core
Current restrictions:
* TICKLESS deactivated
* DeepSleep not supported (DeepSleep wrapped to sleep)
Warning: use of the same IP (example I2C1) by both core at the same time is not prevented,
but is strongly not recommended.
Some Hardware Semaphore are use for common IP, to manage concurrent access by both cores: Flash, GPIO, RCC.
Warning: Drag and drop of binary to DISCO_H747I will flash CM7.
In order to flash CM4, one can use STM32 CubeProgrammer tool.
1. For SHA AC, use atomic flag to manage its ownership.
(1) Nuvoton SHA AC doesn't support SHA context save & restore, so S/W
SHA fallback has been supported before. To make non-blocking 'acquire'
semantics clearer, introduce 'try_acquire' to substitute for 'acquire'.
(2) No biting CPU due to mechanism above.
(3) No deadlock due to mechanism above.
2. For AES/DES/ECC AC, change to mutex to manage their ownership.
(1) Change crypto-misc.c to crypto-misc.cpp to utilize C++ SingletonPtr
which guarantees thread-safe mutex construct-on-first-use.
(2) With change to crypto-misc.cpp, add 'extern "C"' modifier to CRYPTO_IRQHandler()
to avoid name mangling in C++.
(3) No priority inversion because mutex has osMutexPrioInherit attribute
bit set.
(4) No deadlock because these AC are all locked for a short sequence
of operations rather than the whole lifetime of mbedtls context.
(5) For double mbedtls_internal_ecp_init() issue, it has been fixed in upper
mbedtls layer. So no need to change ecc init/free flow.
Have the HW accelearation drivers return the platform module
errors about feature unsupported, and hw acceleration failure,
because the moduel specific errors will be removed.
The features/mbedtls/targets/TARGET_STM/* files include constant needed
for the error codes returned from the MD functions.
The features/mbedtls/targets/hash_wrappers.c provides thin redirection
layer for the hardware accelerated MD implementations that rely on the
old API.
The TESTS/mbedtls/multi/main.cpp has been changed to use the new API
as its build environment does not rely on the translation unit
containing the necessary wrappers.
Martin Kojtal
PARKJIHOON
Andrew Chong
Alexandre Bourdiol
jeromecoutant
Kostiantyn Tkachov
aqin
avolinski
ccli8
Juho Eskeli
Ron Eldor
Moran Peker
Krzysztof Stachowiak
Martin Kojtal
Cruz Monrreal
Krzysztof Stachowiak
Wilfried Chauveau
Kimmo Vaisanen
adustm