From e7bbb9a375154a91e3612d67cb0966ef1a7d32d7 Mon Sep 17 00:00:00 2001
From: able <abl3theabove@gmail.com>
Date: Sun, 17 Sep 2023 16:03:32 -0500
Subject: [PATCH] Arm is now feature parity with x86

---
 kernel/lds/aarch64-qemu.ld     | 11 +++-
 kernel/src/arch/aarch64/mod.rs | 92 ++++++++++++++++++++++++++++++++--
 kernel/src/logger.rs           |  2 +-
 3 files changed, 100 insertions(+), 5 deletions(-)

diff --git a/kernel/lds/aarch64-qemu.ld b/kernel/lds/aarch64-qemu.ld
index 9aa47028..dbcbacf9 100644
--- a/kernel/lds/aarch64-qemu.ld
+++ b/kernel/lds/aarch64-qemu.ld
@@ -7,8 +7,17 @@ SECTIONS
     .text : { *(.text) }
     .data : { *(.data) }
     .rodata : { *(.rodata) }
-    .bss : { *(.bss) }
+    .bss : {
+        *(COMMON)
+        *(.bss .bss.*)
 
+        /* Align initial kernel heap to page boundary */
+        . = ALIGN(4K);
+        PROVIDE(_initial_kernel_heap_start = .);
+        /* PROVIDE(_initial_kernel_heap_size = 1024 * 1024); */
+        PROVIDE(_initial_kernel_heap_size = 1024 * 4096 * 100);
+        . += _initial_kernel_heap_size;
+    } :data
     . = ALIGN(8);
     . = . + 0x4000;
     LD_STACK_PTR = .;
diff --git a/kernel/src/arch/aarch64/mod.rs b/kernel/src/arch/aarch64/mod.rs
index 0aad2c72..a6e359c5 100644
--- a/kernel/src/arch/aarch64/mod.rs
+++ b/kernel/src/arch/aarch64/mod.rs
@@ -1,7 +1,17 @@
-use {core::arch::asm, limine::FramebufferRequest};
-
-pub mod logging;
 pub use logging::log;
+use {
+    crate::{allocator, bootmodules::BootModule, kmain::kmain},
+    core::arch::asm,
+    limine::FramebufferRequest,
+};
+pub mod logging;
+use limine::HhdmRequest;
+extern "C" {
+    fn _initial_kernel_heap_start();
+    fn _initial_kernel_heap_size();
+}
+const INITIAL_KERNEL_HEAP_START: *mut u8 = _initial_kernel_heap_start as _;
+const INITIAL_KERNEL_HEAP_SIZE: *const () = _initial_kernel_heap_size as _;
 
 pub const PAGE_SIZE: usize = 4096;
 
@@ -20,6 +30,80 @@ unsafe extern "C" fn _kernel_start() -> ! {
         }
     }
 
+    static HDHM_REQ: HhdmRequest = HhdmRequest::new(0);
+    // memory::init_pt(VirtAddr::new(
+    //     HDHM_REQ
+    //         .get_response()
+    //         .get()
+    //         .expect("tried to get physical memory mapping offset from Limine")
+    //         .offset,
+    // ));
+    allocator::init(INITIAL_KERNEL_HEAP_START, INITIAL_KERNEL_HEAP_SIZE as _);
+
+    let bm = MOD_REQ.get_response().get();
+    use limine::{KernelFileRequest, ModuleRequest};
+    static KFILE_REQ: KernelFileRequest = KernelFileRequest::new(0);
+    static MOD_REQ: ModuleRequest = ModuleRequest::new(0);
+
+    let mut bootmodules = alloc::vec::Vec::new();
+
+    if bm.is_some() {
+        let bm = bm.unwrap();
+        for x in 0..bm.module_count {
+            let file = bm.modules().get(x as usize);
+            if file.is_some() {
+                let file = file.unwrap();
+                let raw_bytes = core::slice::from_raw_parts(
+                    file.base.as_ptr().expect("invalid initrd"),
+                    file.length as usize,
+                )
+                .to_vec();
+
+                let file_path = alloc::string::String::from_utf8(
+                    file.path.to_str().unwrap().to_bytes().to_vec(),
+                );
+                if file_path.is_err() {
+                    panic!("invalid file path: {:?}", file_path);
+                }
+                let file_cmd = alloc::string::String::from_utf8(
+                    file.cmdline.to_str().unwrap().to_bytes().to_vec(),
+                );
+                if file_cmd.is_err() {
+                    panic!("invalid module cmd: {:?}", file_cmd);
+                }
+
+                log::trace!("module path: {:?}", file_path);
+                log::trace!("module cmd: {:?}", file_cmd);
+
+                bootmodules.push(BootModule::new(
+                    file_path.unwrap(),
+                    raw_bytes,
+                    file_cmd.unwrap(),
+                ));
+            } else {
+                log::error!("You should not be here");
+                break;
+            }
+        }
+        log::info!("Boot module count: {:?}", bootmodules.len());
+        assert_eq!(bm.module_count, bootmodules.len() as u64);
+    }
+
+    crate::kmain::kmain(
+        KFILE_REQ
+            .get_response()
+            .get()
+            .and_then(|r| r.kernel_file.get())
+            .expect("failed to get kernel file from Limine")
+            .cmdline
+            .to_str()
+            .map(core::ffi::CStr::to_str)
+            .transpose()
+            .expect("expected valid cmdline string")
+            .unwrap_or_default(),
+        bootmodules,
+    );
+
     spin_loop();
 }
 
@@ -34,3 +118,5 @@ pub fn hardware_random_u64() -> u64 {
 }
 
 pub fn register_dump() {}
+#[no_mangle]
+pub fn fmod() {}
diff --git a/kernel/src/logger.rs b/kernel/src/logger.rs
index 5f5ae656..486a3688 100644
--- a/kernel/src/logger.rs
+++ b/kernel/src/logger.rs
@@ -4,7 +4,7 @@ use log::{Level, SetLoggerError};
 
 pub fn init() -> Result<(), SetLoggerError> {
     log::set_logger(&crate::logger::Logger)?;
-    log::set_max_level(log::LevelFilter::Trace);
+    log::set_max_level(log::LevelFilter::Debug);
     Ok(())
 }