Generic LEON3¶
Overview¶
This board configuration is designed to work with LEON3 processor template designs available in the GRLIB GPL distribution. It can also be used with the evaluation version of the TSIM3 LEON3 simulator.
Hardware¶
The board configuration is compatible with most GRLIB LEON3 FPGA template designs such as the Digilent Arty A7, Terasic DE0-Nano and Microsemi M2GL-EVAL-KIT.
Programming and Debugging¶
Building¶
Applications for the generic_leon3 board configuration can be built as usual
(see Building an Application).
In order to build the application for generic_leon3, set the BOARD variable
to generic_leon3.
Running on hardware¶
Connect with GRMON, then load and run the application. The example below uses the Terasic DE2-115 Cyclone IV FPGA board.
$ grmon -altjtag -u
GRMON debug monitor v3.2.8 eval version
Copyright (C) 2020 Cobham Gaisler - All rights reserved.
For latest updates, go to http://www.gaisler.com/
Comments or bug-reports to support@gaisler.com
JTAG chain (1): EP3C120/EP4CE115
GRLIB build version: 4250
Detected frequency: 50.0 MHz
Component Vendor
LEON3 SPARC V8 Processor Cobham Gaisler
AHB Debug UART Cobham Gaisler
JTAG Debug Link Cobham Gaisler
GR Ethernet MAC Cobham Gaisler
GRDMAC DMA Controller Cobham Gaisler
LEON2 Memory Controller European Space Agency
AHB/APB Bridge Cobham Gaisler
LEON3 Debug Support Unit Cobham Gaisler
Generic UART Cobham Gaisler
Multi-processor Interrupt Ctrl. Cobham Gaisler
Modular Timer Unit Cobham Gaisler
General Purpose I/O port Cobham Gaisler
SPI Controller Cobham Gaisler
AHB Status Register Cobham Gaisler
Use command 'info sys' to print a detailed report of attached cores
grmon3> load zephyr/zephyr.elf
40000000 text 16.2kB / 16.2kB [===============>] 100%
400040A8 initlevel 40B [===============>] 100%
400040D0 rodata 484B [===============>] 100%
400042B4 datas 20B [===============>] 100%
400042C8 sw_isr_table 256B [===============>] 100%
400043C8 devices 36B [===============>] 100%
Total size: 16.98kB (1.91Mbit/s)
Entry point 0x40000000
Image zephyr/zephyr.elf loaded
grmon3> run
*** Booting Zephyr OS build zephyr-v2.4.0-30-ga124c31ec4cf ***
Hello World! generic_leon3
Running in simulation¶
The same application binary can be simulated with the TSIM3 LEON3 simulator.
$ tsim-leon3
TSIM3 LEON3 SPARC simulator, version 3.0.2 (evaluation version)
Copyright (C) 2020, Cobham Gaisler - all rights reserved.
This software may only be used with a valid license.
For latest updates, go to https://www.gaisler.com/
Comments or bug-reports to support@gaisler.com
Number of CPUs: 2
system frequency: 50.000 MHz
icache: 1 * 4 KiB, 16 bytes/line (4 KiB total)
dcache: 1 * 4 KiB, 16 bytes/line (4 KiB total)
Allocated 4096 KiB SRAM memory, in 1 bank at 0x40000000
Allocated 32 MiB SDRAM memory, in 1 bank at 0x60000000
Allocated 2048 KiB ROM memory at 0x00000000
tsim> load zephyr/zephyr.elf
section: text, addr: 0x40000000, size 16552 bytes
section: initlevel, addr: 0x400040a8, size 40 bytes
section: rodata, addr: 0x400040d0, size 484 bytes
section: datas, addr: 0x400042b4, size 20 bytes
section: sw_isr_table, addr: 0x400042c8, size 256 bytes
section: devices, addr: 0x400043c8, size 36 bytes
Read 436 symbols
tsim> run
Initializing and starting from 0x40000000
*** Booting Zephyr OS build zephyr-v2.4.0-30-ga124c31ec4cf ***
Hello World! generic_leon3