src/kernel/memory.rs

@@ -6,7 +6,6 @@ use crate::boot::params::EXECUTABLE_FILE_RESPONSE;
 use crate::constants::NEWLINE;
 use crate::{LOGGER, LogLevel, format, log_info, log_trace};
 use alloc::string::String;
-use free_list::{AllocError, FreeList, PAGE_SIZE, PageRange};
 use lazy_static::lazy_static;
 use limine::response::MemoryMapResponse;
 use limine::{
@@ -16,16 +15,14 @@ use limine::{
 };
 use spin::Mutex;
 use talc::*;
+use free_list::{AllocError, FreeList, PageRange, PAGE_SIZE};
 
 pub extern crate alloc;
 
 static FREELIST: Mutex<FreeList<32>> = Mutex::new(FreeList::<32>::new());
-static HW_FREELIST: Mutex<FreeList<32>> = Mutex::new(FreeList::<32>::new());
 
 lazy_static! {
-    pub static ref MEMMAP_RESPONSE: &'static MemoryMapResponse = MEMMAP_REQUEST
-        .get_response()
-        .expect("Bootloader did not supply memory map");
+    pub static ref MEMMAP_RESPONSE: &'static MemoryMapResponse = MEMMAP_REQUEST.get_response().expect("Bootloader did not supply memory map");
 }
 
 pub fn deallocate_usable() -> Result<(), AllocError> {
@@ -33,9 +30,7 @@ pub fn deallocate_usable() -> Result<(), AllocError> {
     let mut any_error: Option<AllocError> = None;
     let mut bytes_deallocated: u64 = 0;
     for entry in MEMMAP_RESPONSE.entries() {
-        if (entry.entry_type == EntryType::USABLE)
-            | (entry.entry_type == EntryType::BOOTLOADER_RECLAIMABLE)
-        {
+        if (entry.entry_type == EntryType::USABLE) | (entry.entry_type == EntryType::BOOTLOADER_RECLAIMABLE) {
             if let Err(error) = deallocate(**entry) {
                 any_error = Some(error);
             }
@@ -50,66 +45,12 @@ pub fn deallocate_usable() -> Result<(), AllocError> {
     }
 }
 
-pub fn deallocate_hardware() -> Result<(), AllocError> {
-    let mut any_error: Option<AllocError> = None;
-    let mut bytes_deallocated: u64 = 0;
-    for entry in MEMMAP_RESPONSE.entries() {
-        if (entry.entry_type == EntryType::ACPI_NVS)
-            | (entry.entry_type == EntryType::RESERVED)
-            | (entry.entry_type == EntryType::FRAMEBUFFER)
-        {
-            if let Err(error) = {
-                // Special handling for regions that are too small
-                // TODO: fix
-                let adjusted_base = if (entry.length as usize) < PAGE_SIZE {
-                    entry.base as usize - (PAGE_SIZE - entry.length as usize)
-                } else {
-                    entry.base as usize
-                };
-                let adjusted_length = if (entry.length as usize) < PAGE_SIZE {
-                    PAGE_SIZE
-                } else {
-                    entry.length as usize
-                };
-                let range = PageRange::from_start_len(adjusted_base, adjusted_length);
-                log_trace!(
-                    "Deallocating 0x{:x} @ 0x{:x} hardware reserved memory",
-                    adjusted_length,
-                    adjusted_base
-                );
-                match range {
-                    Ok(range_inner) => unsafe { HW_FREELIST.lock().deallocate(range_inner) },
-                    Err(err) => {
-                        log_error!(
-                            "Failed to convert range 0x{:x} @ 0x{:x}: {}",
-                            adjusted_length,
-                            adjusted_base,
-                            err
-                        );
-                        Ok(())
-                    }
-                }
-            } {
-                any_error = Some(error);
-            }
-            bytes_deallocated += entry.length;
-        }
-    }
-    log_trace!(
-        "Deallocated 0x{:x} bytes of hardware reserved memory",
-        bytes_deallocated
-    );
-    if let Some(error) = any_error {
-        Err(error)
-    } else {
-        Ok(())
-    }
-}
 
 pub fn deallocate(entry: limine::memory_map::Entry) -> Result<(), AllocError> {
-    let range = PageRange::from_start_len(entry.base as usize, entry.length as usize)
-        .expect("Could not convert map entry to range!");
-    unsafe { FREELIST.lock().deallocate(range) }
+    let range = PageRange::from_start_len(entry.base as usize, entry.length as usize).expect("Could not convert map entry to range!");
+    unsafe {
+        FREELIST.lock().deallocate(range)
+    }
 }
 
 pub fn log_memory() {
@@ -171,13 +112,9 @@ pub fn log_memory() {
         );
         log_trace!("Deallocating available memory...");
         let _ = deallocate_usable();
-        let _ = deallocate_hardware();
         let free_bytes = { FREELIST.lock().free_space() };
-        log_info!(
-            "Freelist: 0x{:x} bytes ({} pages)",
-            free_bytes,
-            free_bytes / PAGE_SIZE
-        );
+        log_info!("Freelist: 0x{:x} bytes ({} pages)", free_bytes, free_bytes / PAGE_SIZE);
+
     } else {
         panic!("Memory map contains no entries");
     }
@@ -231,8 +168,8 @@ lazy_static! {
         .expect("Did not get HHDM response from bootloader");
 }
 
-// TODO: 1mb kernel heap. Need to figure out how to make this less stupid...
-static mut ARENA: [u8; 100000] = [0; 100000];
+// TODO: 10kb kernel heap. Need to figure out how to make this less stupid...
+static mut ARENA: [u8; 1000000] = [0; 1000000];
 
 #[global_allocator]
 static ALLOCATOR: Talck<spin::Mutex<()>, ClaimOnOom> =