ARM: moved dep to proper location

Reviewed-on: AbleOS/ableos#6

MANIFESTO.md

@@ -1,68 +0,0 @@
-# The Design of AbleOS
-## The unix philosophy and why it shouldn't exist
-small is only beautiful if its complete.
-    grep for example supports the `-r` flag which should instead be `grep`+`find`
-Everything is not a stream of bytes.
-
-programs can do multiple things well
-    `cat`, `head` and `tail` could all be one program with a flag
-    `which head` `which tail` `which cat` should all return the same binary with different flags
-    ```
-    which head == /bin/cat range=0-10
-
-    which tail == /bin/cat reverse_index=true range=0-10
-
-    which cat == /bin/cat
-    ```
-
-build a prototype quickly only applies if you are being pressured. do thing quickly then refine 
-'choose portability over effeciency' this is a flawed idealogy choose modularity over pure portability
-'store data in flat text files' this leads to a psuedostandardization on KVPair configuration languages that all sit in a flat text file. Instead pick a configuration format that gets loaded into a tree structure
-
-## File Systems
-### The amount of files inside of a folder
-32765. Why you might ask?
-### Dot files
-`dotfiles` were a mistake given to us by bad programmers mocking better programmers. [link](https://web.archive.org/web/20230413171520/http://xahlee.info/UnixResource_dir/writ/unix_origin_of_dot_filename.html)
-
-### File name case sensitivity
-Case sensitivity seems like a great idea! But in practice leads to the following filetree
-```
-/kernel
-/Kernel
-/kErnEl
-/KeRnEl
-```
-which is a nightmare and you should be erradicated if you think this is a positive
-provide a display name for files that allows case and save the file as caseless
-
-### File name character limits
-unix is a plauge upon this earth. name a file `:(){ :|:& };:` and try listing it. You have lost access to your terminal.
-if you defined a sane method of listing files and allowing programs to provide the OS a standard method of providing argument suggestions and being aware you would never run into this issue
-
-## CLI vs GUI
-Graphics are not your enemy unix lovers. You mustn't be stuck in 1981. Times have changed! You can have a graphical shell enviroment. SGI Irix was aware of this in 1988, not perfect of course but 7 years after dos is an impressive leap.
-FFMPEG??? Why no gui? Give me a good git ui
-
-
-### Emails plain text
-Unix believes in plain text emails. Quotes are `>`
-
-### Unix Wizards and Instability
-[Do not meddle in the affairs of Unix, for it is subtle and quick to anger.]
-
-### Unix why are your mouse a file?
-This list is incomplete
-`/dev/input/event1` The PS2 Mouse
-`/dev/input/event3` The USB Mouse
-`/dev/input/psaux` The PS2 Mouse
-`/dev/input/psmouse` The PS2 Mouse
-`/dev/input/mice` The Not(?) PS2 Mouse I think?
-`/dev/input/mouse0` The not Not(?) ps2 mouse? First usb mouse I think?
-`/dev/input/usbhid` USB mice (should be autodetected)
-`/dev/input/sermouse` Most serial mice
-`/dev/input/logibm` Bus mouse connected to Logitech adapter card
-`/dev/input/inport` Bus mouse connected to ATI or Microsoft InPort card
-`/dev/input/by-id/usb-<usbid here>` A usb mouse via its id
-
-I propose a unified system for input via a Device Tree of sorts

README.md

@@ -1,3 +1,4 @@
+```
 TODO
     - Integrate HBVM
         HBVM also needs full spec compliance
@@ -23,10 +24,17 @@ TODO
         - VFS
         - Disk driver
         - A ton more
+```
 
 # Community
-[Discord](https://discord.gg/5TnJ8sa7)
+[Discord](https://discord.gg/JrKVukDtgs)
+
+
 
 # Compiling
+Firstly, I would like to apologize. I am not capable of supporting building on any random machine with any random operating system.
+
+AbleOS very likely builds with `nix-shell` on your operating system.
+
 1. `git submodule update --init`
 1. `cargo repbuild`

kernel/.cargo/config.toml

@@ -4,6 +4,7 @@ build-std-features = ["compiler-builtins-mem"]
 
 [build]
 target = "./targets/x86_64-ableos.json"
+# target = "./targets/aarch64-virt-ableos.json"
 
 [target.'cfg(target_arch = "x86_64")']
 rustflags = ["-C", "target-feature=+rdrand"]

kernel/Cargo.toml

@@ -5,9 +5,10 @@ version = "0.2.0"
 
 
 [dependencies]
+limine = { version = "0.1", git = "https://github.com/limine-bootloader/limine-rs" }
 
 hbvm = { git = "https://git.ablecorp.us/ableos/holey-bytes" }
-hbasm = { git = "https://git.ablecorp.us/ableos/holey-bytes" }
+# hbasm = { git = "https://git.ablecorp.us/ableos/holey-bytes" }
 
 embedded-graphics = "0.7.1"
 
@@ -47,7 +48,6 @@ features = [
 
 
 [target.'cfg(target_arch = "x86_64")'.dependencies]
-limine = { version = "0.1", git = "https://github.com/limine-bootloader/limine-rs" }
 x86_64 = "0.14"
 x2apic = "0.4"
 virtio-drivers = "0.4.0"

kernel/data/⑨. バカ

@@ -1,33 +0,0 @@
-                                                                                
-                      .////                           *(####                    
-                     (####((/,                      (########,                  
-                    (##%##(###((                 ,(#########%#                  
-                    #%%%%###(###((.            *((####%%&%%%%#                  
-                   .#####%%%%%####((.        *(####%&&&&&%%%%#                  
-                    #(((((((##%%&&%#((/    /#(##%&&%##########                  
-                    /######%%%%%%%(..........(#%%%%%%#####%%#                   
-                    ,#%%%%%%#/...... ..............,&&&%%###.                   
-                    ,%%#(#(...........................(#&&%%#                   
-                    .###%...............................%%#(#.                  
-                     #%&.................................%#                     
-                   ,%&&*.................................&&%(                   
-                   %%#//........./............*/..,......&&&%#                  
-                        .......,..............*,*.,,,,,,.                       
-                       ......./....,.........*,,,,.,,,,,,                       
-                       ,...../..(###%,.....&*&%###/..,.,,.                      
-                       ,,..../%(((#(,.....,%%%%###,..,..,.                      
-                      .,,*.../..,#,.........,(&(,,**.,,,,,                      
-                       ,/((..,*..........,,.,,,,,**.,##((                       
-                         /(((%%%,,,,,.,,,,,,,,,,,#/##(,(/                       
-                           .***..(,.#%%%&&#/%,,(%*,,**#                         
-                          **,...,(#%%%%&#%%%#%%%%,,.,,***.                      
-                        .....,*,*#%%%%%###%##%%%&,,*,,....                      
-                    ......,*/.  (############%%%&&&&#*,,....                    
-                    ...,*,..,(((((((((((#((((((((((((&&&#*,                     
-                        ,##///////(((((((((((((#///#///(##/.                    
-                      /*/**//... ...**(((((((,.      .,*......                  
-                    .......      ......,,/*,.     ...........                   
-                    ,..,,,,......   .. ....   ,,....... ..,,,                   
-                         ........,.,.,*//////*,......,.                         
-                          ...,,,,               ,,,,,,        
-

kernel/lds/aarch64-qemu.ld

@@ -0,0 +1,14 @@
+ENTRY(_start)
+SECTIONS
+{
+    . = 0x40080000;
+    .text.boot : { *(.text.boot) }
+    .text : { *(.text) }
+    .data : { *(.data) }
+    .rodata : { *(.rodata) }
+    .bss : { *(.bss) }
+
+    . = ALIGN(8);
+    . = . + 0x4000;
+    LD_STACK_PTR = .;
+}

kernel/lds/x86_64.ld

@@ -48,7 +48,7 @@ SECTIONS
         . = ALIGN(4K);
         PROVIDE(_initial_kernel_heap_start = .);
         /* PROVIDE(_initial_kernel_heap_size = 1024 * 1024); */
-        PROVIDE(_initial_kernel_heap_size = 1024 * 4096);
+        PROVIDE(_initial_kernel_heap_size = 1024 * 4096 * 100);
         . += _initial_kernel_heap_size;
     } :data
 }

kernel/src/arch/aarch64/mod.rs

@@ -1 +1,21 @@
-//! 
+//!
+// #[allow(deprecated)]
+// use limine::{TerminalRequest, TerminalResponse};
+
+#[no_mangle]
+unsafe extern "C" fn _kernel_start() -> ! {
+    loop {}
+}
+
+pub fn log(_args: core::fmt::Arguments<'_>) -> core::fmt::Result {
+    panic!()
+}
+
+pub fn sloop() -> ! {
+    loop {}
+}
+pub fn hardware_random_u64() -> u64 {
+    0
+}
+
+pub const PAGE_SIZE: usize = 10;

kernel/src/arch/x86_64/cpuid.rs

@@ -1,3 +1,5 @@
+use crate::cpu_features;
+
 use {
     alloc::vec::Vec,
     core::{arch::asm, fmt, ops::Deref, slice, str},
@@ -772,23 +774,8 @@ impl Master {
     // TODO: Macroify this and also include all of the cpu features from self
     pub fn features(&self) -> Vec<(&str, bool)> {
         let mut fv = Vec::new();
-        let apic = self.apic();
-        let avx = self.avx();
-        let avx2 = self.avx2();
-        let x2 = self.x2apic();
-
-        let gb_pages = self.gigabyte_pages();
-        let rdseed = self.rdseed();
-        let rdrand = self.rdrand();
-
-        fv.push(("apic", apic));
-        fv.push(("avx", avx));
-        fv.push(("avx2", avx2));
-        fv.push(("gigabyte pages", gb_pages));
-        fv.push(("rdrand", rdrand));
-        fv.push(("rdseed", rdseed));
-        fv.push(("x2apic", x2));
-        fv
+        cpu_features!(self, fv);
+        return fv;
     }
 
     master_attr_reader!(version_information, VersionInformation);

kernel/src/host.rs

@@ -63,49 +63,26 @@ pub enum HostError {
 // // pub fn rpc_register(_engine: &mut Engine) {}
 // // pub fn rpc_call(_engine: &mut Engine) {}
 
-use log::error;
-
-use hbvm::vm::{
-    mem::{Memory, MemoryAccessReason, PageSize},
-    trap::HandleTrap,
-    value::Value,
-};
-
+use {hbvm::vm::mem::HandlePageFault, log::error};
 /// AbleOS HBVM traphandler
 pub struct TrapHandler;
-impl HandleTrap for TrapHandler {
+impl HandlePageFault for TrapHandler {
     fn page_fault(
         &mut self,
-        mar: MemoryAccessReason,
-        memory: &mut Memory,
+        reason: hbvm::vm::mem::MemoryAccessReason,
+        memory: &mut hbvm::vm::mem::Memory,
         vaddr: u64,
-        size: PageSize,
+        size: hbvm::vm::mem::PageSize,
         dataptr: *mut u8,
     ) -> bool {
         error!(
-            "MemoryAccessReason: {}
-Memory: {:?}
-VAddr: {}
-Size: {:?}
-DataPTR: {:?}",
-            mar, memory, vaddr, size, dataptr
+            "REASON: {}
+memory: {:?}
+vaddr: {}
+size: {:?}
+Dataptr {:?}",
+            reason, memory, vaddr, size, dataptr
         );
         false
     }
-
-    fn invalid_op(&mut self, _: &mut [Value; 256], _: &mut usize, _: &mut Memory, _: u8) -> bool
-    where
-        Self: Sized,
-    {
-        log::trace!("Invalid opcode");
-
-        false
-    }
-
-    fn ecall(&mut self, _: &mut [Value; 256], _: &mut usize, _: &mut Memory)
-    where
-        Self: Sized,
-    {
-        log::trace!("ableOS system call made");
-    }
 }

kernel/src/kmain.rs

@@ -1,13 +1,12 @@
 //! AbleOS Kernel Entrypoint
 
-use crate::capabilities;
-
 // use crate::arch::sloop;
 use {
     crate::{
-        arch::logging::SERIAL_CONSOLE,
         bootmodules::{build_cmd, BootModules},
+        capabilities,
         device_tree::DeviceTree,
+        scheduler::Scheduler,
     },
     alloc::format,
     log::{debug, info, trace},
@@ -32,7 +31,7 @@ pub fn kmain(cmdline: &str, boot_modules: BootModules) -> ! {
 
     let dt = DEVICE_TREE.lock();
 
-    info!("Device Tree{}", dt);
+    info!("Device Tree: {}", dt);
     info!("Boot complete. Moving to init_system");
 
     // TODO: schedule the disk driver from the initramfs
@@ -41,65 +40,12 @@ pub fn kmain(cmdline: &str, boot_modules: BootModules) -> ! {
 
     capabilities::example();
 
-    // TODO: change this to a driver
-    {
-        let mut prog = alloc::vec![];
-        let mut code = alloc::string::String::new();
-
-        let mut sc = SERIAL_CONSOLE.lock();
-        loop {
-            match sc.receive() {
-                b'\r' => {
-                    code.push('\n');
-
-                    sc.send(b'\r');
-                    sc.send(b'\n');
-
-                    match hbasm::assembly(&code, &mut prog) {
-                        Ok(_) => {
-                            use hbvm::validate::validate;
-                            match validate(&prog) {
-                                Err(_e) => {
-                                    // log::error!("Program validation error: {e:?}");
-                                }
-                                Ok(_) => {
-                                    // log::info!("valid program");
-                                    use {crate::host::TrapHandler, hbvm::vm::Vm};
-                                    let mut vm;
-                                    unsafe {
-                                        vm = Vm::new_unchecked(&prog, TrapHandler);
-                                        vm.memory.insert_test_page();
-                                    }
-                                    // log::info!("Program interrupt: {:?}", vm.run());
-                                    // log::debug!("{:?}", vm.registers);
-                                }
-                            }
-
-                            sc.send(b'>');
-                        }
-                        Err(_e) => {
-                            // log::error!(
-                            // "Error {:?} at {:?} (`{}`)",
-                            // e.kind,
-                            // e.span.clone(),
-                            // &code[e.span],
-                            // );
-                            for x in "err".as_bytes() {
-                                sc.send(*x);
-                            }
-                        }
-                    }
-                    code = alloc::string::String::new();
-                }
-                byte => {
-                    code.push(byte as char);
-
-                    sc.send(byte);
-                }
-            }
-        }
-    }
+    let mut sched = Scheduler::new();
+    // AHEM that isn't a valid HBVM program
+    sched.new_process(boot_modules[0].bytes.clone());
+    sched.new_process(boot_modules[1].bytes.clone());
 
+    sched.run();
     // sloop();
 }
 

kernel/src/logger.rs

@@ -16,16 +16,17 @@ impl log::Log for Logger {
 
     fn log(&self, record: &log::Record) {
         let lvl = record.level();
+        let lvl_color = match lvl {
+            Level::Error => "160",
+            Level::Warn => "172",
+            Level::Info => "47",
+            Level::Debug => "25",
+            Level::Trace => "103",
+        };
+        let module = record.module_path().unwrap_or_default();
+        let line = record.line().unwrap_or_default();
         crate::arch::log(format_args!(
-            "\x1b[38;5;{}m{lvl}\x1b[0m [{}]: {}\r\n",
-            match lvl {
-                Level::Error => "160",
-                Level::Warn => "172",
-                Level::Info => "47",
-                Level::Debug => "25",
-                Level::Trace => "103",
-            },
-            record.module_path().unwrap_or_default(),
+            "\x1b[38;5;{lvl_color}m{lvl}\x1b[0m [{module}:{line}]: {}\r\n",
             record.args(),
         ))
         .expect("write to serial console");

kernel/src/scheduler.rs

@@ -1,22 +1,58 @@
-use {crate::host::TrapHandler, alloc::vec::Vec, hbvm::vm::Vm};
+use {
+    alloc::{collections::VecDeque, rc::Rc, slice, vec::Vec},
+    hbvm::validate::validate,
+};
+
+use {crate::host::TrapHandler, hbvm::vm::Vm};
+const TIMER_QUOTIENT: usize = 100;
 
 pub struct Scheduler<'a> {
-    data: Vec<Vm<'a, TrapHandler>>,
+    data: VecDeque<Vm<'a, TrapHandler, TIMER_QUOTIENT>>,
 }
 
+// NOTE: This is a very simple schduler and it sucks and should be replaced with a better one
+// Written By Yours Truly: Munir
+
 impl Scheduler<'_> {
-    // fn new_process(&mut self, program: Vec<u8>) {
-    //     let prog = program.clone();
-    //     #[allow(clippy::redundant_else)]
-    //     if let Err(e) = validate(&prog) {
-    //         log::error!("Program validation error: {e:?}");
-    //     } else {
-    //         log::info!("valid program");
-    //         unsafe {
-    //             let mut vm = Vm::new_unchecked(&prog, TrapHandler);
-    //             vm.memory.insert_test_page();
-    //             self.data.push(vm);
-    //         }
-    //     }
-    // }
+    pub fn new() -> Self {
+        Self {
+            data: VecDeque::new(),
+        }
+    }
+    pub fn new_process(&mut self, program: Vec<u8>) {
+        let prog = program.clone();
+        let prog_arc = Rc::new(prog);
+
+        let binding = Rc::try_unwrap(prog_arc).ok().unwrap();
+
+        #[allow(clippy::redundant_else)]
+        if let Err(e) = validate(&program.as_slice()) {
+            log::error!("Program validation error: {e:?}");
+        } else {
+            log::info!("valid program");
+            unsafe {
+                let slice = slice::from_raw_parts(binding.as_ptr(), binding.len());
+                let mut vm = Vm::new_unchecked(&*slice, TrapHandler);
+                vm.memory.insert_test_page();
+                self.data.push_front(vm);
+            }
+        }
+    }
+
+    pub fn run(&mut self) -> ! {
+        loop {
+            // If there are no programs to run then sleep.
+            if self.data.is_empty() {
+                use crate::arch::sloop;
+                sloop();
+            }
+
+            let mut prog = self.data.pop_front().unwrap();
+            prog.run().unwrap();
+
+            // log::info!("VM registers {:?}", prog.registers);
+            log::info!("Scheduled program");
+            self.data.push_back(prog);
+        }
+    }
 }

kernel/src/utils.rs

@@ -25,4 +25,29 @@ macro_rules! device_tree {
             $devtree.devices.insert(each_device_type.to_string(), Vec::new());
         }
     };
+}
+
+// NOTE: this only reduces the code duplication in source code not in generated code!
+// Written by Yours Truly: Munir
+/// A simple macro to reduce code duplication when we insert cpu features into the array/vector
+#[macro_export]
+macro_rules! cpu_features {
+    ($cpu_master_object:expr, $result_vec:expr) => {
+        // checks for cpu features and returns bool for each feature
+        let apic = $cpu_master_object.apic();
+        let avx = $cpu_master_object.avx();
+        let avx2 = $cpu_master_object.avx2();
+        let x2 = $cpu_master_object.x2apic();
+        let gb_pages = $cpu_master_object.gigabyte_pages();
+        let rdseed = $cpu_master_object.rdseed();
+        let rdrand = $cpu_master_object.rdrand();
+
+        $result_vec.push(("apic", apic));
+        $result_vec.push(("avx", avx));
+        $result_vec.push(("avx2", avx2));
+        $result_vec.push(("gigabyte pages", gb_pages));
+        $result_vec.push(("rdrand", rdrand));
+        $result_vec.push(("rdseed", rdseed));
+        $result_vec.push(("x2apic", x2));
+    };
 }

kernel/targets/aarch64-virt-ableos.json

@@ -0,0 +1,25 @@
+{
+    "arch": "aarch64",
+    "data-layout": "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128",
+    "disable-redzone": true,
+    "env": "",
+    "executables": true,
+    "features": "+strict-align,+neon,+fp-armv8",
+    "linker": "rust-lld",
+    "linker-flavor": "ld.lld",
+    "linker-is-gnu": true,
+    "pre-link-args": {
+        "ld.lld": [
+            "-Tkernel/lds/aarch64-qemu.ld"
+        ]
+    },
+    "llvm-target": "aarch64-unknown-none",
+    "max-atomic-width": 128,
+    "os": "none",
+    "panic-strategy": "abort",
+    "relocation-model": "static",
+    "target-c-int-width": "32",
+    "target-endian": "little",
+    "target-pointer-width": "64",
+    "vendor": ""
+}

meta.md

@@ -1,51 +0,0 @@
-
-
-
-
-
-
-
-ARI AbleOS Remote Install
-
-Server
-/boot/server_kernel_x86_64.bin
-/boot/kernel_x86_64.bin
-/boot/kernel_aarch64.bin
-
-/home/projects/askl.askl - aksldfhlkasjdhflkajshdflkj
-
-
-ARI_SERVER.wasm
-NAS 10.1.10.10
-
-ARI 10.1.10.10
-/boot/limine.cfg
-/boot/kernel_x86_64.bin
-/boot/kernel.toml
-/home/projects/askl.askl
-aksldfhlkasjdhflkajshdflkj
-
-
-ARI 10.1.10.10
-/boot/limine.cfg
-/boot/kernel_aarch64.bin
-/boot/kernel.toml
-
-
-
-/system/
-/shared/
-/home/programs/
-                project_name/
-                    project_name.wasm
-                    project_name.toml
-
-
-
-
-/system/pkgman.toml
-
-//////
-[repositories]
-PUR = "https://git.ablecorp.us/ableos/pur"
-

repbuild/Cargo.toml

@@ -4,7 +4,16 @@ version = "0.2.0"
 edition = "2021"
 
 [dependencies]
-env_logger = "0.10"
+cpio_reader = "0.1"
+derive_more = "0.99"
+env_logger  = "0.10"
 error-stack = "0.2"
-fatfs = "0.3"
-log = "0.4"
+fatfs       = "0.3"
+log         = "0.4"
+rpm         = "0.11"
+zstd        = "0.12"
+
+[dependencies.reqwest]
+version = "0.11"
+default-features = false
+features = ["rustls-tls", "blocking"]

repbuild/limine.cfg

@@ -18,8 +18,8 @@ TERM_BACKDROP=008080
     # Setting a default resolution for the framebuffer
     RESOLUTION=1024x768x24
 
-    MODULE_PATH=boot:///background.bmp
+    MODULE_PATH=boot:///inf_loop.hb
     MODULE_CMDLINE="diskid=123456789"
 
-    MODULE_PATH=boot:///background.bmp
+    MODULE_PATH=boot:///inf_loop.hb
     MODULE_CMDLINE=""

repbuild/src/main.rs

@@ -1,9 +1,14 @@
-use std::fs;
-
 use {
-    error_stack::{bail, report, Context, IntoReport, Result, ResultExt},
+    derive_more::{Deref, DerefMut, Display},
+    error_stack::{bail, ensure, report, Context, IntoReport, Result, ResultExt},
     fatfs::{FileSystem, FormatVolumeOptions, FsOptions, ReadWriteSeek},
-    std::{fmt::Display, fs::File, io, path::Path, process::Command},
+    std::{
+        fmt::Display,
+        fs::File,
+        io::{self, Write},
+        path::Path,
+        process::Command,
+    },
 };
 
 fn main() -> Result<(), Error> {
@@ -30,6 +35,9 @@ fn main() -> Result<(), Error> {
                 if arg == "rv64" || arg == "riscv64" || arg == "riscv64-virt" {
                     target = Target::Riscv64Virt;
                 }
+                if arg == "aarch" || arg == "arm64" {
+                    target = Target::Aarch64;
+                }
             }
 
             build(release, target).change_context(Error::Build)
@@ -44,6 +52,9 @@ fn main() -> Result<(), Error> {
                 if arg == "rv64" || arg == "riscv64" || arg == "riscv64-virt" {
                     target = Target::Riscv64Virt;
                 }
+                if arg == "arm64" || arg == "aarch64" {
+                    target = Target::Aarch64;
+                }
             }
 
             build(release, target)?;
@@ -110,12 +121,18 @@ fn get_fs() -> Result<FileSystem<impl ReadWriteSeek>, io::Error> {
         &mut File::open("repbuild/background.bmp")?,
         &mut fs.root_dir().create_file("background.bmp")?,
     )?;
+    io::copy(
+        &mut File::open("repbuild/inf_loop.hb")?,
+        &mut fs.root_dir().create_file("inf_loop.hb")?,
+    )?;
 
     drop(bootdir);
     Ok(fs)
 }
 
 fn build(release: bool, target: Target) -> Result<(), Error> {
+    fetch_ovmf().change_context(Error::OvmfFetch)?;
+
     let fs = get_fs().change_context(Error::Io)?;
     let mut com = Command::new("cargo");
     com.current_dir("kernel");
@@ -124,11 +141,11 @@ fn build(release: bool, target: Target) -> Result<(), Error> {
         com.arg("-r");
     }
 
-    match target {
-        Target::Riscv64Virt => {
-            com.args(["--target", "targets/riscv64-virt-ableos.json"]);
-        }
-        _ => {}
+    if target == Target::Riscv64Virt {
+        com.args(["--target", "targets/riscv64-virt-ableos.json"]);
+    }
+    if target == Target::Aarch64 {
+        com.args(["--target", "targets/aarch64-virt-ableos.json"]);
     }
 
     match com.status() {
@@ -160,15 +177,13 @@ fn run(release: bool, target: Target) -> Result<(), Error> {
     let mut com = match target {
         Target::X86_64 => Command::new("qemu-system-x86_64"),
         Target::Riscv64Virt => Command::new("qemu-system-riscv64"),
+        Target::Aarch64 => Command::new("qemu-system-aarch64"),
     };
 
     if target == Target::X86_64 {
         #[rustfmt::skip]
         com.args([
-            "-bios",
-                std::env::var("REPBUILD_QEMU_FIRMWARE_PATH")
-                .as_deref()
-                .unwrap_or("/usr/share/ovmf/x64/OVMF_CODE.fd"),
+            "-bios", "target/OVMF_CODE.fd",
             "-drive", "file=target/disk.img,format=raw",
             "-m", "4G",
             // "-serial", "stdio",
@@ -188,7 +203,7 @@ fn run(release: bool, target: Target) -> Result<(), Error> {
         #[cfg(target_os = "linux")]
         {
 
-            // com.args(["-enable-kvm", "-cpu", "host"]);
+            //com.args(["-enable-kvm", "-cpu", "host"]);
         }
     }
 
@@ -207,6 +222,14 @@ fn run(release: bool, target: Target) -> Result<(), Error> {
         ]);
     }
 
+    if target == Target::Aarch64 {
+        com.args([
+            "-M", "virt", "-m", //
+            "128M",
+            // "-serial", "stdio",
+        ]);
+    }
+
     match com
         .status()
         .into_report()
@@ -217,33 +240,122 @@ 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";
+
+    let mut file = match std::fs::metadata("target/OVMF_CODE.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")
+            .into_report()
+            .change_context(OvmfFetchError::Io)?,
+        Ok(_) => return Ok(()),
+        Err(e) => return Err(report!(e).change_context(OvmfFetchError::Io)),
+    };
+
+    log::info!("No OVMF found, downloading…");
+    let rpm = rpm::RPMPackage::parse(
+        &mut std::convert::identity::<reqwest::Result<_>>((|| {
+            reqwest::blocking::get(OVMF_RPM_URL)?.bytes()
+        })())
+        .into_report()
+        .change_context(OvmfFetchError::Fetch)?
+        .as_ref(),
+    )
+    .map_err(RpmError)
+    .into_report()
+    .change_context(OvmfFetchError::RpmParse)?;
+
+    ensure!(
+        rpm.metadata
+            .get_payload_compressor()
+            .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,
+}
+
+impl Context for OvmfFetchError {}
+
 #[derive(Clone, Copy, PartialEq, Eq)]
 enum Target {
     X86_64,
     Riscv64Virt,
+    Aarch64,
 }
 
-#[derive(Debug)]
+#[derive(Debug, Display)]
 enum Error {
+    #[display(fmt = "Failed to build the kernel")]
     Build,
+    #[display(fmt = "Missing or invalid subcommand (available: build, run)")]
     InvalidSubCom,
+    #[display(fmt = "IO Error")]
     Io,
+    #[display(fmt = "Failed to spawn a process")]
     ProcessSpawn,
+    #[display(fmt = "Failed to fetch UEFI firmware")]
+    OvmfFetch,
+    #[display(fmt = "QEMU Error: {}", "fmt_qemu_err(*_0)")]
     Qemu(Option<i32>),
 }
 
 impl Context for Error {}
-impl Display for Error {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::Build => f.write_str("failed to build the kernel"),
-            Self::InvalidSubCom => {
-                f.write_str("missing or invalid subcommand (available: build, run)")
+
+fn fmt_qemu_err(e: Option<i32>) -> impl Display {
+    struct W(Option<i32>);
+    impl Display for W {
+        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+            if let Some(c) = self.0 {
+                c.fmt(f)
+            } else {
+                f.write_str("Interrupted by signal")
             }
-            Self::Io => f.write_str("IO error"),
-            Self::ProcessSpawn => f.write_str("failed to spawn a process"),
-            Self::Qemu(Some(c)) => write!(f, "QEMU Error: {c}"),
-            Self::Qemu(None) => write!(f, "QEMU Error: interrupted by signal"),
         }
     }
+
+    W(e)
 }