Tool/software:
Hi,
What is the base address of the ITS area?
Also, in SDK9.10, will the size specified in the KeyStore Flash Size of the "PSA Crypto + KeyStore" module be secured within the ITS area?
For example, in the following, will 8kb be allocated within the ITS area?
Hello,
The ITS region is specified in the following source code:
C:\ti\simplelink_lowpower_f3_sdk_9_10_00_83\source\third_party\hsmddk\include\Integration\Adapter_ITS\incl\build_dependencies
flash_layout.h
In the document, only the name appears, and no details are given.
If we know FLASH_ITS_SIZE, we can find the base address of the ITS, but how much size is reserved?
Hello,
I apologize for the delay here. You can check the ti_drivers_config.c file that is generated via sysconfig:
#include <third_party/hsmddk/include/Integration/Adapter_PSA/incl/adapter_psa_key_management.h>
#include <ti/devices/DeviceFamily.h>
#include DeviceFamily_constructPath(inc/hw_memmap.h)
#include DeviceFamily_constructPath(inc/hw_device.h)
uint8_t volatileAllocBuffer[KEYSTORE_VOLATILE_MEMORY_POOL_SIZE];
const size_t volatileAllocBufferSizeBytes = KEYSTORE_VOLATILE_MEMORY_POOL_SIZE;
const size_t MBEDTLS_KEY_VOLATILE_COUNT = KEYSTORE_VOLATILE_SLOT_COUNT;
const size_t MBEDTLS_KEY_ASSET_STORE_COUNT = KEYSTORE_ASSET_STORE_SLOT_COUNT;
/* For cache slots */
const size_t MBEDTLS_KEY_PERSISTENT_COUNT = KEYSTORE_PERSISTENT_SLOT_COUNT;
/* For Key Store flash space */
const size_t FLASH_KEY_PERSISTENT_COUNT = KEYSTORE_PERSISTENT_NUM_KEYS;
/* ITS flash area size */
const size_t FLASH_ITS_SIZE = KEYSTORE_FLASH_SIZE;
psa_key_context_t gl_PSA_Key[KEYSTORE_TOTAL_SLOT_COUNT];
#if ((KEYSTORE_FLASH_OFFSET + KEYSTORE_FLASH_SIZE) > FLASH_MAIN_SW_SIZE)
#error "The configured KeyStore flash region goes beyond the accessible flash addresses on the device."
#elif (KEYSTORE_FLASH_OFFSET < FLASH_MAIN_BASE)
#error "The configured KeyStore flash region begins before the start of accessible flash on the device."
#endif
/* ITS flash area address, with 'Pointer' region type */
const void *FLASH_ITS_ADDRESS = (void *) 0xe6000;
We can see that the value of FLASH_ITS_SIZE is set to KEYSTORE_FLASH_SIZE which would be the amount indicated in sysconfig:
Hope that helps!
Best,
Nima Behmanesh