Visible to Intel only — GUID: jlq1638888753961
Ixiasoft
Visible to Intel only — GUID: jlq1638888753961
Ixiasoft
4.5.2.1. Nios® V Processor Application Copied from Configuration QSPI Flash to RAM Using Boot Copier (Bootloader via SDM)
You can use a boot copier to copy the Nios® V application from configuration QSPI flash to RAM when multiple iterations of application software development and high system performance are required. Altera recommends applying the memory organization in Memory Organization for Bootloader via SDM to use the Bootloader via SDM. The following section covers the description of each memory and the steps required to create them.
Memory Organization for Bootloader via SDM
The Nios® V processor system should comprise of the following memory spaces to implement the Bootloader via SDM and Nios® V application. The memories are implemented as such:
- Bootloader ROM and RAM (used by Bootloader via SDM only).
- Nios® V processor application RAM (used by user application only).
Memory |
Memory Type |
Application Use |
Linker Section |
Notes |
---|---|---|---|---|
Bootloader ROM (Internal ROM) |
Read-Only Memory (ROM) | Bootloader via SDM | .text | Set as the Nios® V processor reset agent. Perform memory initialization with Bootloader via SDM (.hex) file. |
Bootloader RAM (Internal RAM) |
Random Access Memory (RAM) | Bootloader via SDM | .rodata, .rwdata , .bss, .stack, .heap,.exceptions |
Initialize Bootloader via SDM using alt_load(). |
User Application RAM (Internal or External RAM) | Random Access Memory (RAM) | Nios® V Application | .text, .rodata, .rwdata, .bss, .stack, .heap, .exceptions |
The Nios® V processor application is loaded into RAM from flash by the Bootloader via SDM. |