Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 7/19/2024
Public

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13.4.2.1. Initiator Firewall and Security

All initiators on the system interconnect are expected to drive the secure bit attribute for every transaction. In addition to secure bit, each initiator is assigned a unique ID that identifies the source of a transaction. Accesses to secure targets by non-secure initiators result in a bus error. The following table shows the values of the initiator security bit.

Table 370.  Initiator Security Bit
Initiator Secure Bit Secure State Non-Secure State Source
AXI-AP A*PROT[1] 0 1 Driven by AXI-AP
CCU_IOS A*PROT[1] 0 1 Driven by CCU (transported from MPU & FPGA2HPS)
DMAx A*PROT[1] 0 1 Driven by DMA
ETR A*PROT[1] 0 1 Driven by ETR
SDM2HPS_LL A*PROT[1] 0 1 Driven by PSI
SDM2HPS_BE A*PROT[1] 0 1 Driven by PSI
EMACx (TSNx) A*PROT[1] 0 1 Driven by system manager
NAND A*PROT[1] 0 1 Driven by system manager
SD/eMMC A*PROT[1] 0 1 Driven by system manager
USB3.x A*PROT[1] 0 1 Driven by USB3.x
USB2.x HA*PROT[1] 0 1 Driven by system manager
EMAC_TBU A*PROT[1] 0 1 Driven by TBU (transported from EMAC/TSN or page table attribute)
ETR_TBU A*PROT[1] 0 1 Driven by TBU (transported from ETR or page table attribute)
SDM_TBU A*PROT[1] 0 1 Driven by TBU (transported from PSI or page table attribute)
IO_TBU A*PROT[1] 0 1 Driven by TBU (transported or page table attribute)
DMU_TBU A*PROT[1] 0 1 Driven by TBU (transported or page table attribute)
MPU_PP A*PROT[1] 0 1 Driven by DSU
COMBO_PHY N/A 0 --- Tie off to 0