allocator work

ableos/.cargo/config.toml

@@ -1,6 +1,6 @@
 [build]
-# target = "riscv64gc-unknown-none-elf"
-target = "json_targets/x86_64-ableos.json"
+target = "riscv64gc-unknown-none-elf"
+# target = "json_targets/x86_64-ableos.json"
 
 [unstable]
 build-std = ["core", "compiler_builtins", "alloc"]

ableos/Cargo.toml

@@ -12,23 +12,25 @@ run-args = [
   "--nodefaults",
   "-cpu",
   "Broadwell-v3",
-
+  "-m",
+  "4G",
   "-serial",
   "stdio",
   "-smp",
   "cores=2",
 
 
-
- "-soundhw", "pcspk",
-"-device", "VGA",
+  "-soundhw",
+  "pcspk",
+  "-device",
+  "VGA",
   # "-device", "virtio-gpu-pci",
 
   # "-machine", "pcspk-audiodev=0",
 
 
   "-qmp",
-    "unix:../qmp-sock,server,nowait"
+  "unix:../qmp-sock,server,nowait",
 
 ]
 
@@ -57,7 +59,6 @@ embedded-graphics="*"
 pc-keyboard = "0.5"
 
 
-
 [dependencies.logos]
 version = "0.12"
 default-features = false
@@ -121,7 +122,6 @@ version = "*"
 git = "https://git.ablecorp.us:443/able/externc-libm.git"
 
 
-
 [target.'cfg(target_arch = "riscv")'.dependencies]
 riscv = "*"
 

ableos/src/allocator/aalloc.rs

@@ -1,10 +1,63 @@
 //! The allocator to be implemented by ableOS
+//!
+//! NOTE: All memory regions are taken from https://wiki.osdev.org/Memory_Map_(x86)
 
 use alloc::alloc::{GlobalAlloc, Layout};
-use core::ptr::null_mut;
+use core::{fmt::Display, ptr::null_mut};
 
-pub struct AAloc;
-unsafe impl GlobalAlloc for AAloc {
+const HEAP_START: usize = 600_000_000;
+const BLOCK_SIZE: usize = 1024;
+const BLOCK_COUNT: usize = 512;
+#[derive(Debug, Clone, Copy)]
+pub struct MemoryRegion {
+    start: usize,
+    end: usize,
+}
+#[derive(Debug, Clone, Copy)]
+pub struct AAlloc {
+    current_region: usize,
+    memory_regions: [Option<MemoryRegion>; 512],
+}
+
+impl AAlloc {
+    pub fn add_region(&mut self, mem: MemoryRegion) {
+        self.memory_regions[self.current_region] = Some(mem);
+        self.current_region += 1;
+    }
+
+    pub fn intialize() {
+        info!("Heap Start: {}", HEAP_START);
+        info!("Heap Size:  {}", BLOCK_SIZE * BLOCK_COUNT);
+        info!("Heap End:   {}", HEAP_START + BLOCK_SIZE * BLOCK_COUNT);
+
+        let mut aalloc = AAlloc {
+            current_region: 0,
+            memory_regions: [None; 512],
+        };
+
+        aalloc.add_region(MemoryRegion {
+            start: 0x00100000,
+            end: 0x00EFFFFF,
+        });
+        debug!("{}", aalloc);
+    }
+}
+
+impl Display for AAlloc {
+    fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+        write!(f, "AAlloc {{\n\tcurrent_region: {},\n", self.current_region)?;
+
+        for x in 0..self.current_region {
+            if let Some(region) = self.memory_regions[x] {
+                write!(f, "\tRegion {}: {:?}\n", x, region)?;
+            }
+        }
+        write!(f, "}}")?;
+        Ok(())
+    }
+}
+
+unsafe impl GlobalAlloc for AAlloc {
     unsafe fn alloc(&self, _layout: Layout) -> *mut u8 {
         println!("Allocating memory");
 

ableos/src/allocator/mod.rs

@@ -1,12 +1,12 @@
-mod aalloc;
-
-use linked_list_allocator::LockedHeap;
+pub mod aalloc;
+pub use aalloc::*;
 
 pub const HEAP_START: usize = 0x_4444_4444_0000;
 pub const HEAP_MULTIPLIER: usize = 100000;
 pub const HEAP_BASE: usize = 100;
 pub const HEAP_SIZE: usize = HEAP_BASE * HEAP_MULTIPLIER;
 
+/*
 #[global_allocator]
 pub static ALLOCATOR: LockedHeap = LockedHeap::empty();
 
@@ -14,3 +14,6 @@ pub static ALLOCATOR: LockedHeap = LockedHeap::empty();
 fn alloc_error_handler(layout: alloc::alloc::Layout) -> ! {
     panic!("allocation error: {:?}", layout)
 }
+
+
+*/

ableos/src/lib.rs

@@ -64,6 +64,9 @@ pub mod virtio;
 pub mod wasm;
 pub mod wasm_jumploader;
 
+pub mod allocator;
+
+// pub use allocator as aalloc;
 mod unicode_utils;
 pub mod vga_e;
 

ableos/src/scratchpad.rs

@@ -1,3 +1,4 @@
+// use crate::aalloc::aalloc;
 use crate::arch::generate_process_pass;
 use crate::arch::interrupts::{reset_pit_for_cpu, set_pit_2};
 use crate::devices::pci;
@@ -5,7 +6,7 @@ use crate::filesystem::FILE_SYSTEM;
 use crate::rhai_shell::shell;
 use crate::rhai_shell::KEYBUFF;
 use crate::wasm_jumploader::run_program;
-use crate::{SCREEN_BUFFER};
+use crate::SCREEN_BUFFER;
 use acpi::{AcpiTables, PlatformInfo};
 use cpuio::inb;
 use cpuio::outb;
@@ -110,8 +111,7 @@ pub fn scratchpad() {
 
     debug!("end the graphics");
     // */
-
-
+    // kernel::aalloc::AAlloc::intialize();
 
     real_shell();
 }

kernel/src/aalloc/aalloc.rs

@@ -0,0 +1,125 @@
+//! The allocator to be implemented by ableOS
+//!
+//! NOTE: All memory regions are taken from https://wiki.osdev.org/Memory_Map_(x86)
+
+#![allow(missing_docs)]
+
+use alloc::alloc::{GlobalAlloc, Layout};
+use core::{
+    fmt::Display,
+    ptr::{self, null_mut},
+};
+use log::{debug, info, trace};
+
+// const HEAP_START: usize = 600_000_000;
+const HEAP_START: usize = 0x00100000;
+const BLOCK_SIZE: usize = 1024;
+const BLOCK_COUNT: usize = 512;
+
+#[derive(Debug, Clone, Copy)]
+pub struct MemoryRegion {
+    start: usize,
+    end: usize,
+}
+impl Display for MemoryRegion {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        writeln!(
+            f,
+            "MemoryRegion {{ start: {}, end: {}, size: {} bytes}}",
+            self.start,
+            self.end,
+            self.end - self.start
+        )
+    }
+}
+impl MemoryRegion {
+    pub fn new(start: usize, end: usize) -> MemoryRegion {
+        MemoryRegion { start, end }
+    }
+    pub fn test_region(&self) -> bool {
+        unsafe {
+            let mutptr = self.start as *mut u8;
+
+            core::ptr::write(mutptr, 0xFF);
+            // trace!("{}", core::ptr::read(mutptr));
+        }
+
+        true
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+pub struct AAlloc {
+    current_region: usize,
+    memory_regions: [Option<MemoryRegion>; 512],
+}
+
+impl AAlloc {
+    fn test_regions(&self) {
+        for x in 0..self.current_region {
+            if let Some(region) = self.memory_regions[x] {
+                debug!("Region {}: {:?}", x, region);
+            }
+        }
+    }
+
+    pub fn add_region(&mut self, mem: MemoryRegion) {
+        self.memory_regions[self.current_region] = Some(mem);
+        self.current_region += 1;
+    }
+
+    pub fn intialize() {
+        info!("Heap Start: {}", HEAP_START);
+        info!("Heap Size:  {}", BLOCK_SIZE * BLOCK_COUNT);
+        info!("Heap End:   {}", HEAP_START + BLOCK_SIZE * BLOCK_COUNT);
+
+        let mut aalloc = AAlloc {
+            current_region: 0,
+            memory_regions: [None; 512],
+        };
+
+        // BS MEMORY REGION
+        aalloc.add_region(MemoryRegion::new(HEAP_START, HEAP_START + 10));
+
+        aalloc.add_region(MemoryRegion::new(0x00007E00, 0x0007FFFF));
+
+        aalloc.add_region(MemoryRegion::new(0x00100000, 0x00EFFFFF));
+
+        // ISA Memory Hole
+        aalloc.add_region(MemoryRegion::new(0x00F00000, 0x00FFFFFF));
+
+        aalloc.add_region(MemoryRegion::new(0x0000000100000000, 0x0000000100000000));
+
+        aalloc.memory_regions[0].unwrap().test_region();
+        debug!("{}", aalloc);
+    }
+}
+
+impl Display for AAlloc {
+    fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+        write!(f, "AAlloc {{\n\tcurrent_region: {},\n", self.current_region)?;
+
+        for x in 0..self.current_region {
+            if let Some(region) = self.memory_regions[x] {
+                write!(f, "\tRegion {}: {}", x, region)?;
+            }
+        }
+        write!(f, "}}")?;
+        Ok(())
+    }
+}
+
+unsafe impl GlobalAlloc for AAlloc {
+    unsafe fn alloc(&self, _layout: Layout) -> *mut u8 {
+        info!("Allocating memory");
+
+        info!("{}", _layout.size());
+        info!("{}", _layout.align());
+
+        null_mut()
+    }
+
+    unsafe fn dealloc(&self, _ptr: *mut u8, _layout: Layout) {
+        panic!("dealloc should be never called")
+    }
+}

kernel/src/aalloc/mod.rs

@@ -0,0 +1,12 @@
+#![allow(missing_docs)]
+
+pub mod aalloc;
+pub use aalloc::*;
+/*
+#[alloc_error_handler]
+fn alloc_error_handler(layout: alloc::alloc::Layout) -> ! {
+    panic!("allocation error: {:?}", layout)
+}
+
+
+*/

kernel/src/lib.rs

@@ -8,6 +8,7 @@
 
 extern crate alloc;
 
+pub mod aalloc;
 pub mod allocator;
 pub mod arch;
 pub mod device_interface;