A skeleton baremetal project

Dependencies

cargo-binutils: cargo install cargo-binutils
- (required by binutils) rustup component add llvm-tools-preview
ARM64 cross-target: rustup target add aarch64-unknown-none-softfloat

Status

It doesn't do much. It currently just blinks the green ACT led a few times and outputs "Hello World!" to the console before panicking. The panic handler outputs the panic message to the console. The stack issue was resolved. Current issue: Any atomic memory access fails. I don't really know what that means. I haven't setup everything yet. We still need page tables. Also, maybe there's some multi cpu setup that needs to happen before being able to use atomics. I don't know.

Instructions

Initial Configuration:

Add firewall rule for TFTP: UDP 69 inbound
Add firewall rule for DHCP: UDP 67 inbound
Configure static ip for eth0: 10.0.0.10 subnet 255.0.0.0

Development time setup

Plug in the raspberry pi + power it on:
- The static ip configuration only takes effect when the computer sees something on eth0. The DHCP server will ignore eth0 if doesn't have a subnet configuration that matches (eth0 is 169 if no device)
Start the DHCP server clear; sudo dhcpd -4 -cf ./dhcp.conf
Start the TFTP server clear; sudo in.tftpd -4 --listen -s tftp-root
(optional) Run wireshark sudo wireshark

Development cycle

run ./make.sh
Restart the pi (either unplug / replug or use the reset button)

evan-brass/baremetal-pi