ARM: checkpoint from micro-tau

kernel/lds/aarch64-qemu.ld

@@ -1,7 +1,8 @@
-ENTRY(_start)
+ENTRY(_kernel_start)
+
 SECTIONS
 {
-    . = 0x40080000;
+    . = 0xffffffff80000000;
     .text.boot : { *(.text.boot) }
     .text : { *(.text) }
     .data : { *(.data) }

kernel/src/arch/aarch64/mod.rs

@@ -1,29 +1,32 @@
-//!
+use {core::arch::asm, limine::FramebufferRequest};
-// #[allow(deprecated)]
+
-// use limine::{TerminalRequest, TerminalResponse};
+pub const PAGE_SIZE: usize = 4096;
 
 #[no_mangle]
-#[allow(deprecated)]
 unsafe extern "C" fn _kernel_start() -> ! {
-    use limine::{Framebuffer, FramebufferRequest, NonNullPtr};
     static FB_REQ: FramebufferRequest = FramebufferRequest::new(0);
-    let fb1: &NonNullPtr<Framebuffer> = &FB_REQ.get_response().get().unwrap().framebuffers()[0];
+    let fb1 = &FB_REQ.get_response().get().unwrap().framebuffers()[0];
-    unsafe {
+
-        fb1.address.as_ptr().expect("REASON").write_volatile(0x00);
+    for i in 0..100_usize {
+        let offset = i * fb1.pitch as usize + i * 4;
+        unsafe {
+            *(fb1.address.as_ptr().unwrap().offset(offset as isize) as *mut u32) = 0xFFFFFFFF;
+        }
     }
 
-    loop {}
+    spin_loop();
+}
+
+pub fn spin_loop() -> ! {
+    loop {
+        unsafe { asm!("wfi") }
+    }
+}
+
+pub fn hardware_random_u64() -> u64 {
+    0
 }
 
 pub fn log(_args: core::fmt::Arguments<'_>) -> core::fmt::Result {
     panic!()
 }
-
-pub fn spin_loop() -> ! {
-    loop {}
-}
-pub fn hardware_random_u64() -> u64 {
-    0
-}
-
-pub const PAGE_SIZE: usize = 10;

repbuild/Cargo.toml

@@ -4,14 +4,14 @@ version = "0.2.0"
 edition = "2021"
 
 [dependencies]
-cpio_reader = "0.1"
+cpio_reader = "0.1" # remove me
 derive_more = "0.99"
 env_logger  = "0.10"
 error-stack = "0.2"
 fatfs       = "0.3"
 log         = "0.4"
-rpm         = "0.11"
+rpm         = "0.11" # remove me
-zstd        = "0.12"
+zstd        = "0.12" # remove me
 
 [dependencies.reqwest]
 version = "0.11"

repbuild/limine.cfg

@@ -1,4 +1,4 @@
-${ABLEOS_KERNEL}=boot:///{$ARCH}/kernel
+${ABLEOS_KERNEL}=boot:///kernel
 # TODO: Make a boot background image for ableOS
 
 DEFAULT_ENTRY=1

repbuild/src/main.rs

@@ -1,6 +1,6 @@
 use {
-    derive_more::{Deref, DerefMut, Display},
+    derive_more::Display,
-    error_stack::{bail, ensure, report, Context, IntoReport, Result, ResultExt},
+    error_stack::{bail, report, Context, IntoReport, Result, ResultExt},
     fatfs::{FileSystem, FormatVolumeOptions, FsOptions, ReadWriteSeek},
     std::{
         fmt::Display,
@@ -31,12 +31,12 @@ fn main() -> Result<(), Error> {
             for arg in args {
                 if arg == "-r" || arg == "--release" {
                     release = true;
-                }
+                } else if arg == "rv64" || arg == "riscv64" || arg == "riscv64-virt" {
-                if arg == "rv64" || arg == "riscv64" || arg == "riscv64-virt" {
                     target = Target::Riscv64Virt;
-                }
+                } else if arg == "aarch" || arg == "arm64" {
-                if arg == "aarch" || arg == "arm64" {
                     target = Target::Aarch64;
+                } else {
+                    return Err(report!(Error::InvalidSubCom));
                 }
             }
 
@@ -48,12 +48,12 @@ fn main() -> Result<(), Error> {
             for arg in args {
                 if arg == "-r" || arg == "--release" {
                     release = true;
-                }
+                } else if arg == "rv64" || arg == "riscv64" || arg == "riscv64-virt" {
-                if arg == "rv64" || arg == "riscv64" || arg == "riscv64-virt" {
                     target = Target::Riscv64Virt;
-                }
+                } else if arg == "aarch" || arg == "arm64" {
-                if arg == "arm64" || arg == "aarch64" {
                     target = Target::Aarch64;
+                } else {
+                    return Err(report!(Error::InvalidSubCom));
                 }
             }
 
@@ -168,8 +168,8 @@ fn build(release: bool, target: Target) -> Result<(), Error> {
         _ => (),
     }
 
-    if target != Target::X86_64 {
+    if target != Target::Aarch64 {
-        return Ok(());
+        todo!()
     }
 
     (|| -> std::io::Result<_> {
@@ -216,8 +216,7 @@ fn run(release: bool, target: Target) -> Result<(), Error> {
 
         #[cfg(target_os = "linux")]
         {
-
+            // com.args(["-enable-kvm", "-cpu", "host"]);
-            //com.args(["-enable-kvm", "-cpu", "host"]);
         }
     }
 
@@ -237,19 +236,16 @@ fn run(release: bool, target: Target) -> Result<(), Error> {
     }
 
     if target == Target::Aarch64 {
+        #[rustfmt::skip]
         com.args([
-            "-bios",
+            "-M", "virt",
-            "AAVMF_CODE.fd",
+            "-cpu", "cortex-a72",
-            "-M",
+            "-device", "ramfb",
-            "virt",
+            "-device", "qemu-xhci",
-            "-device",
+            "-device", "usb-kbd",
-            "ramfb",
+            "-m", "2G",
-            "-m", //
+            "-bios", "target/AARCH64_OVMF.fd",
-            "128M",
+            "-drive", "file=target/disk.img,format=raw",
-            //
-            "-drive",
-            "file=target/disk.img,format=raw",
-            // "-serial", "stdio",
         ]);
     }
 
@@ -264,14 +260,15 @@ fn run(release: bool, target: Target) -> Result<(), Error> {
 }
 
 fn fetch_ovmf() -> Result<(), OvmfFetchError> {
-    const OVMF_RPM_URL: &str = "https://kojipkgs.fedoraproject.org/packages/edk2/20230524/3.fc38/noarch/edk2-ovmf-20230524-3.fc38.noarch.rpm";
+    const OVMF_AARCH64_URL: &str =
+        "https://retrage.github.io/edk2-nightly/bin/RELEASEAARCH64_QEMU_EFI.fd";
 
-    let mut file = match std::fs::metadata("target/OVMF_CODE.fd") {
+    let mut file = match std::fs::metadata("target/AARCH64_OVMF.fd") {
         Err(e) if e.kind() == std::io::ErrorKind::NotFound => std::fs::OpenOptions::new()
             .create(true)
             .write(true)
             .read(true)
-            .open("target/OVMF_CODE.fd")
+            .open("target/AARCH64_OVMF.fd")
             .into_report()
             .change_context(OvmfFetchError::Io)?,
         Ok(_) => return Ok(()),
@@ -279,64 +276,22 @@ fn fetch_ovmf() -> Result<(), OvmfFetchError> {
     };
 
     log::info!("No OVMF found, downloading…");
-    let rpm = rpm::RPMPackage::parse(
+
-        &mut std::convert::identity::<reqwest::Result<_>>((|| {
+    let bytes = std::convert::identity((|| reqwest::blocking::get(OVMF_AARCH64_URL)?.bytes())())
-            reqwest::blocking::get(OVMF_RPM_URL)?.bytes()
-        })())
         .into_report()
-        .change_context(OvmfFetchError::Fetch)?
+        .change_context(OvmfFetchError::Fetch)?;
-        .as_ref(),
-    )
-    .map_err(RpmError)
-    .into_report()
-    .change_context(OvmfFetchError::RpmParse)?;
 
-    ensure!(
+    file.write_all(&bytes)
-        rpm.metadata
+        .into_report()
-            .get_payload_compressor()
+        .change_context(OvmfFetchError::Io)?;
-            .map_err(RpmError)
-            .into_report()
-            .change_context(OvmfFetchError::RpmParse)?
-            == rpm::CompressionType::Zstd,
-        OvmfFetchError::UnsupportedCompression,
-    );
-
-    file.write_all(
-        cpio_reader::iter_files(
-            &zstd::decode_all(std::io::Cursor::new(rpm.content))
-                .into_report()
-                .change_context(OvmfFetchError::Zstd)?,
-        )
-        .find(|file| file.name() == "./usr/share/edk2/ovmf/OVMF_CODE.fd")
-        .ok_or_else(|| report!(OvmfFetchError::NoFileFound))?
-        .file(),
-    )
-    .into_report()
-    .change_context(OvmfFetchError::Io)?;
 
     Ok(())
 }
 
-#[derive(Debug, Display, Deref, DerefMut)]
-struct RpmError(rpm::RPMError);
-impl Context for RpmError {}
-
-// Ehhh?? I am pretty sure they just forgot :ferrisClueless:
-unsafe impl Sync for RpmError {}
-unsafe impl Send for RpmError {}
-
 #[derive(Debug, Display)]
 enum OvmfFetchError {
     #[display(fmt = "Failed to fetch OVMF package")]
     Fetch,
-    #[display(fmt = "RPM parse error")]
-    RpmParse,
-    #[display(fmt = "Unsupported compression (ZSTD is the only supported one)")]
-    UnsupportedCompression,
-    #[display(fmt = "Decompression error")]
-    Zstd,
-    #[display(fmt = "Requested file not found in package")]
-    NoFileFound,
     #[display(fmt = "IO Error")]
     Io,
 }