Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 4/01/2024
Public
Document Table of Contents

6.4.1.7. Boot Scratch Space

The boot scratch space contains ten registers on the warm reset domain, ten registers on the cold reset domain, and ten registers on the POR reset domain as shown in the table below.

Table 288.  Boot Scratch Space Registers
Register Name Reset Domain Description
System_Mgr.boot_scratch_por<0:9> 10 32-bit scratch registers on the POR reset domain The register contents will be cleared on an HPS POR reset but will be retained in both an HPS cold reset and/or HPS warm reset.
System_Mgr.boot_scratch_cold<0:9> 10 32-bit scratch registers on the Cold reset domain The register contents will be cleared on an HPS POR reset and/or an HPS cold reset, but will be retained on an HPS warm reset.
System_Mgr.boot_scratch_warm<0:9> 10 32-bit scratch registers on the Warm reset domain The register contents will be cleared on an HPS POR reset and/or an HPS cold reset and/or an HPS warm reset.