first PAC experiments

zynq-examples/Cargo.toml

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+[package]
+name = "zynq-examples"
+version = "0.1.0"
+authors = ["Robin Mueller <muellerr@irs.uni-stuttgart.de>"]
+edition = "2024"
+description = "Examples for the Zynq7000 family of SoCs"
+homepage = "https://egit.irs.uni-stuttgart.de/rust/zynq7000-rs"
+repository = "https://egit.irs.uni-stuttgart.de/rust/zynq7000-rs"
+license = "MIT OR Apache-2.0"
+keywords = ["no-std", "arm", "cortex-a", "amd", "zynq7000"]
+categories = ["embedded", "no-std", "hardware-support"]
+
+[dependencies]
+cortex-r-a = { path = "../../cortex-r-a/cortex-r-a" }
+zynq7000-rt = { path = "../zynq7000-rt" }

zynq-examples/src/main.rs

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+#![no_std]
+#![no_main]
+
+use core::panic::PanicInfo;
+use cortex_r_a::asm::nop;
+use zynq7000_rt as _;
+
+/// Entry point (not called like a normal main function)
+#[unsafe(no_mangle)]
+pub extern "C" fn boot_core(cpu_id: u32) -> ! {
+    if cpu_id != 0 {
+        panic!("unexpected CPU ID {}", cpu_id);
+    }
+    main();
+}
+
+#[unsafe(export_name = "main")]
+pub fn main() -> ! {
+    loop {
+        nop();
+    }
+}
+
+/// Panic handler
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    loop {}
+}