Add a test that checks boot info values

tests/default_settings.rs

@@ -10,6 +10,11 @@ fn should_panic() {
     run_test_binary("should_panic");
 }
 
+#[test]
+fn check_boot_info() {
+    run_test_binary("check_boot_info");
+}
+
 fn run_test_binary(bin_name: &str) {
     let mut cmd = Command::new(env!("CARGO"));
     cmd.current_dir("tests/test_kernels/default_settings");

tests/test_kernels/default_settings/src/bin/check_boot_info.rs

@@ -0,0 +1,46 @@
+#![no_std] // don't link the Rust standard library
+#![no_main] // disable all Rust-level entry points
+
+use bootloader::{boot_info::PixelFormat, entry_point, BootInfo};
+use core::panic::PanicInfo;
+use kernel::{exit_qemu, QemuExitCode};
+
+entry_point!(kernel_main);
+
+fn kernel_main(boot_info: &'static mut BootInfo) -> ! {
+    // check memory regions
+    assert!(boot_info.memory_regions.len() > 4);
+
+    // check framebuffer
+    let framebuffer = boot_info.framebuffer.as_ref().unwrap();
+    assert_eq!(framebuffer.info().byte_len, framebuffer.buffer().len());
+    assert_eq!(framebuffer.info().horizontal_resolution, 1024);
+    assert_eq!(framebuffer.info().vertical_resolution, 768);
+    assert_eq!(framebuffer.info().bytes_per_pixel, 3);
+    assert_eq!(framebuffer.info().stride, 1024);
+    assert_eq!(framebuffer.info().pixel_format, PixelFormat::RGB);
+    assert_eq!(framebuffer.buffer().len(), 1024 * 768 * 3);
+
+    // check defaults for optional features
+    assert_eq!(boot_info.physical_memory_offset.into_option(), None);
+    assert_eq!(boot_info.recursive_index.into_option(), None);
+
+    // check rsdp_addr
+    let rsdp = boot_info.rsdp_addr.into_option().unwrap();
+    assert!(rsdp > 0x000E0000);
+    assert!(rsdp < 0x000FFFFF);
+
+    // the test kernel has no TLS template
+    assert_eq!(boot_info.tls_template.into_option(), None);
+
+    exit_qemu(QemuExitCode::Success);
+}
+
+/// This function is called on panic.
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    use core::fmt::Write;
+
+    let _ = writeln!(kernel::serial(), "PANIC: {}", info);
+    exit_qemu(QemuExitCode::Failed);
+}