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1. Introduction
2. FPGA Configuration First Mode
3. HPS Boot First Mode
4. Creating the Configuration Files
5. Golden System Reference Design and Design Examples
6. Configuring the FPGA Fabric from HPS Software
7. Debugging the Agilex™ 7 SoC FPGA Boot Flow
8. SoC FPGA Boot User Guide Archives
9. Document Revision History for Agilex™ 7 SoC FPGA Boot User Guide
A. Boot Scratch Registers
4.1. Overview
4.2. Quartus® Prime Hardware Project Compilation
4.3. Bootloader Software Compilation
4.4. Programming File Generator
4.5. Configuration over JTAG
4.6. Configuration from QSPI
4.7. Configuration over AVST
4.8. Configuration via Protocol
4.9. Remote System Update
4.10. Partial Reconfiguration
A.1. BOOT_SCRATCH_COLD0
A.2. BOOT_SCRATCH_COLD1
A.3. BOOT_SCRATCH_COLD2
A.4. BOOT_SCRATCH_COLD3
A.5. BOOT_SCRATCH_COLD4, BOOT_SCRATCH_COLD5
A.6. BOOT_SCRATCH_COLD6, BOOT_SCRATCH_COLD7
A.7. BOOT_SCRATCH_COLD8
A.8. BOOT_SCRATCH_COLD9
A.9. BOOT_SCRATCH_COLD0, BOOT_SCRATCH_COLD1, BOOT_SCRATCH_COLD8, BOOT_SCRATCH_COLD9
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7.1.2. L4 Watchdog Timer 0
Each CPU has its own L4 Watchdog Timer. The HPS FSBL enables L4 Watchdog Timer 0 for CPU0. L4 Watchdog Timer 0 issues a reset when a timeout occurs because of a corrupted bitstream or HPS image or any other issue that causes the HPS to hang.
This watchdog is active until the second-stage bootloader indicates that it has started correctly and taken control of the exception vectors. The timeout is configurable at the FSBL source. U-Boot SPL default is 3 seconds for timeout.