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fpga,doc: refine doc about standalone(pynq) #29

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2 changes: 1 addition & 1 deletion fpga/boot/README.md
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Expand Up @@ -3,7 +3,7 @@

Refer to www.wiki.xilinx.com/Fetch+Sources for more information.

To prepare BOOT.BIN in stand-alone mode, plase refer to [this doc](standalone.md).
To prepare BOOT.BIN in stand-alone mode (like on PYNQ), plase refer to [this doc](standalone.md).

## Build bl31.elf - Arm Trusted Firmware

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34 changes: 29 additions & 5 deletions fpga/boot/standalone.md
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Expand Up @@ -46,14 +46,38 @@ We use PYNQ-Z2 board as example to demonstrate how to prepare boot files in sta



## Build RV_BOOT.BIN
## Build RV_BOOT.bin

RV_BOOT.BIN is the default filename of linux-kernel image. [Here](pynq/RV_BOOT.bin) is a pre-built and currently-used image. You can also build it yourself by riscv-pk and riscv-linux (zynq-standalone branch).
RV_BOOT.bin is the default filename of linux-kernel image. [Here](pynq/RV_BOOT.bin) is a pre-built and currently-used image. You can also build it yourself by riscv-pk and riscv-linux (currently not avaliable to the public).



## Prepare SD Card
## Build rootfs in SD Card

Please follow the instructions in [README](README.md) to build rootfs in SD card and then put `BOOT.BIN`, `RV_BOOT.BIN` generated in the previous steps into `/dev/mmcblk0p1`.
* New an `ext4` partition `mmcblk0p2` in SD card. Refer to the step of [here](https://wiki.debian.org/InstallingDebianOn/Xilinx/ZC702/wheezy#SD_Card_root) before executing `debootstrap`.

Pull down SW0 on pynq board to boot Debian.
* download the debian base system to `mmcblk0p2` with `qemu-debootstrap`.

```
sudo qemu-debootstrap --arch riscv64 stable /mnt http://ftp.debian.org/debian
sudo chroot /mnt /bin/bash
passwd
apt-get update
apt-get install net-tools openssh-server vim build-essential minicom tmux libreadline-dev
exit
```

* Add a line of `ttyPS0` in `/mnt/etc/securetty` to allow login debian via `ttyPS0`. See [here](http://www.linuxquestions.org/questions/linux-newbie-8/login-incorrect-error-after-boot-no-password-prompted-881131/) for more details.

* Add a line of `PermitRootLogin yes` in `/mnt/etc/ssh/sshd_config` to enable root login via ssh. See [here](https://linuxconfig.org/enable-ssh-root-login-on-debian-linux-server) for more details.
* Add the following lines to `/mnt/etc/fstab`

```
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/mmcblk0p1 /boot vfat defaults 0 2
/dev/mmcblk0p2 / ext4 errors=remount-ro 0 1
```

Put `BOOT.BIN`, `RV_BOOT.BIN` generated in the previous steps into `/dev/mmcblk0p1`.
Finally, insert the SD card into the board. Pull down SW0 on pynq board to boot Debian.