Visible to Intel only — GUID: sfo1410068058225
Ixiasoft
Visible to Intel only — GUID: sfo1410068058225
Ixiasoft
7.2.2.2.1. Peripheral and System Firewalls
The peripheral and system firewalls each have a group of Security Configuration Registers (SCRs) that can be programmed by the DAP, FPGA fabric or MPU only in secure mode.
Secure Flag Value | Access |
---|---|
0 | Only secure packets are allowed to pass the firewall. |
1 | Transaction packets are allowed to pass the firewall. |
When a transaction packet is sent from a master, the master also drives a secure flag signal on the bus. This flag indicates whether the attempted transaction from the master is secure or non-secure. For AXI master accesses, this flag is the ~AxPROT[1] signal.
For L4 ECC, L4 system or L4 DDR master accesses, this flag is the MSecure[0] signal.
When the flag signal is driven high, it indicates a secure access. When the flag signal is low, it indicates a non-secure access.