ZYNQ¶
About this¶
This document describes the information about Xilinx Zynq U-Boot - like supported boards, ML status and TODO list.
Zynq boards¶
Xilinx Zynq-7000 All Programmable SoCs enable extensive system level differentiation, integration, and flexibility through hardware, software, and I/O programmability.
- zc702 (single qspi, gem0, mmc) [1]
- zc706 (dual parallel qspi, gem0, mmc) [2]
- zed (single qspi, gem0, mmc) [3]
- microzed (single qspi, gem0, mmc) [4]
- zc770
- zc770-xm010 (single qspi, gem0, mmc)
- zc770-xm011 (8 or 16 bit nand)
- zc770-xm012 (nor)
- zc770-xm013 (dual parallel qspi, gem1)
Building¶
configure and build for zc702 board:
$ export DEVICE_TREE=zynq-zc702
$ make xilinx_zynq_virt_defconfig
$ make
Bootmode¶
Zynq has a facility to read the bootmode from the slcr bootmode register once user is setting through jumpers on the board - see page no:1546 on [5]
All possible bootmode values are defined in Table 6-2:Boot_Mode MIO Pins on [5].
board_late_init() will read the bootmode values using slcr bootmode register at runtime and assign the modeboot variable to specific bootmode string which is intern used in autoboot.
SLCR bootmode register Bit[3:0] values
#define ZYNQ_BM_NOR 0x02
#define ZYNQ_BM_SD 0x05
#define ZYNQ_BM_JTAG 0x0
“modeboot” variable can assign any of “norboot”, “sdboot” or “jtagboot” bootmode strings at runtime.
Flashing¶
SD Card¶
To write an image that boots from a SD card first create a FAT32 partition and a FAT32 filesystem on the SD card:
sudo fdisk /dev/sdx
sudo mkfs.vfat -F 32 /dev/sdx1
Mount the SD card and copy the SPL and U-Boot to the root directory of the SD card:
sudo mount -t vfat /dev/sdx1 /mnt
sudo cp spl/boot.bin /mnt
sudo cp u-boot.img /mnt
Mainline status¶
- Added basic board configurations support.
- Added zynq u-boot bsp code - arch/arm/mach-zynq
- Added zynq boards named - zc70x, zed, microzed, zc770_xm010/xm011/xm012/xm013
- Added zynq drivers:
serial: drivers/serial/serial_zynq.c net: drivers/net/zynq_gem.c mmc: drivers/mmc/zynq_sdhci.c spi: drivers/spi/zynq_spi.c qspi: drivers/spi/zynq_qspi.c i2c: drivers/i2c/zynq_i2c.c nand: drivers/mtd/nand/raw/zynq_nand.c - Done proper cleanups on board configurations
- Added basic FDT support for zynq boards
- d-cache support for zynq_gem.c
- [1] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC702-G.htm
- [2] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC706-G.htm
- [3] http://zedboard.org/product/zedboard
- [4] http://zedboard.org/product/microzed
- [5] http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf