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Merge branch 'post-11' into post-12

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This commit is contained in:
Philipp Oppermann
2020-05-20 14:31:12 +02:00
parent a076ff16ad 9828ec0eff
commit 60b5f3402e
4 changed files with 22 additions and 14 deletions
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14
Cargo.lock generated
View File

@@ -33,7 +33,7 @@ dependencies = [
"spin", "spin",
"uart_16550", "uart_16550",
"volatile", "volatile",
"x86_64", "x86_64 0.11.0",
] ]
[[package]] [[package]]
@@ -188,7 +188,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d44b0f30cb82b0fbc15b78ade1064226529ad52028bc8cb8accb98ff6f3d7131" checksum = "d44b0f30cb82b0fbc15b78ade1064226529ad52028bc8cb8accb98ff6f3d7131"
dependencies = [ dependencies = [
"bitflags", "bitflags",
"x86_64", "x86_64 0.9.6",
] ]
[[package]] [[package]]
@@ -206,3 +206,13 @@ dependencies = [
"bit_field", "bit_field",
"bitflags", "bitflags",
] ]
[[package]]
name = "x86_64"
version = "0.11.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "365de37eb7c6da582cbb510dd0f3f1235d24ff6309a8a96e8a9909cc9bfd608f"
dependencies = [
"bit_field",
"bitflags",
]

2
Cargo.toml
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@@ -16,7 +16,7 @@ harness = false
bootloader = { version = "0.9.3", features = ["map_physical_memory"]} bootloader = { version = "0.9.3", features = ["map_physical_memory"]}
volatile = "0.2.6" volatile = "0.2.6"
spin = "0.5.2" spin = "0.5.2"
x86_64 = "0.9.6" x86_64 = "0.11.0"
uart_16550 = "0.2.0" uart_16550 = "0.2.0"
pic8259_simple = "0.1.1" pic8259_simple = "0.1.1"
pc-keyboard = "0.5.0" pc-keyboard = "0.5.0"

2
src/allocator.rs
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@@ -35,7 +35,7 @@ pub fn init_heap(
.allocate_frame() .allocate_frame()
.ok_or(MapToError::FrameAllocationFailed)?; .ok_or(MapToError::FrameAllocationFailed)?;
let flags = PageTableFlags::PRESENT | PageTableFlags::WRITABLE; let flags = PageTableFlags::PRESENT | PageTableFlags::WRITABLE;
mapper.map_to(page, frame, flags, frame_allocator)?.flush(); unsafe { mapper.map_to(page, frame, flags, frame_allocator)?.flush() };
} }
unsafe { unsafe {

18
src/memory.rs
View File

@@ -2,7 +2,6 @@ use bootloader::bootinfo::{MemoryMap, MemoryRegionType};
use x86_64::{ use x86_64::{
structures::paging::{ structures::paging::{
FrameAllocator, Mapper, OffsetPageTable, Page, PageTable, PhysFrame, Size4KiB, FrameAllocator, Mapper, OffsetPageTable, Page, PageTable, PhysFrame, Size4KiB,
UnusedPhysFrame,
}, },
PhysAddr, VirtAddr, PhysAddr, VirtAddr,
}; };
@@ -45,11 +44,12 @@ pub fn create_example_mapping(
use x86_64::structures::paging::PageTableFlags as Flags; use x86_64::structures::paging::PageTableFlags as Flags;
let frame = PhysFrame::containing_address(PhysAddr::new(0xb8000)); let frame = PhysFrame::containing_address(PhysAddr::new(0xb8000));
// FIXME: ONLY FOR TEMPORARY TESTING
let unused_frame = unsafe { UnusedPhysFrame::new(frame) };
let flags = Flags::PRESENT | Flags::WRITABLE; let flags = Flags::PRESENT | Flags::WRITABLE;
let map_to_result = mapper.map_to(page, unused_frame, flags, frame_allocator); let map_to_result = unsafe {
// FIXME: this is not safe, we do it only for testing
mapper.map_to(page, frame, flags, frame_allocator)
};
map_to_result.expect("map_to failed").flush(); map_to_result.expect("map_to failed").flush();
} }
@@ -57,7 +57,7 @@ pub fn create_example_mapping(
pub struct EmptyFrameAllocator; pub struct EmptyFrameAllocator;
unsafe impl FrameAllocator<Size4KiB> for EmptyFrameAllocator { unsafe impl FrameAllocator<Size4KiB> for EmptyFrameAllocator {
fn allocate_frame(&mut self) -> Option<UnusedPhysFrame> { fn allocate_frame(&mut self) -> Option<PhysFrame> {
None None
} }
} }
@@ -82,7 +82,7 @@ impl BootInfoFrameAllocator {
} }
/// Returns an iterator over the usable frames specified in the memory map. /// Returns an iterator over the usable frames specified in the memory map.
fn usable_frames(&self) -> impl Iterator<Item = UnusedPhysFrame> { fn usable_frames(&self) -> impl Iterator<Item = PhysFrame> {
// get usable regions from memory map // get usable regions from memory map
let regions = self.memory_map.iter(); let regions = self.memory_map.iter();
let usable_regions = regions.filter(|r| r.region_type == MemoryRegionType::Usable); let usable_regions = regions.filter(|r| r.region_type == MemoryRegionType::Usable);
@@ -91,14 +91,12 @@ impl BootInfoFrameAllocator {
// transform to an iterator of frame start addresses // transform to an iterator of frame start addresses
let frame_addresses = addr_ranges.flat_map(|r| r.step_by(4096)); let frame_addresses = addr_ranges.flat_map(|r| r.step_by(4096));
// create `PhysFrame` types from the start addresses // create `PhysFrame` types from the start addresses
let frames = frame_addresses.map(|addr| PhysFrame::containing_address(PhysAddr::new(addr))); frame_addresses.map(|addr| PhysFrame::containing_address(PhysAddr::new(addr)))
// we know that the frames are really unused
frames.map(|f| unsafe { UnusedPhysFrame::new(f) })
} }
} }
unsafe impl FrameAllocator<Size4KiB> for BootInfoFrameAllocator { unsafe impl FrameAllocator<Size4KiB> for BootInfoFrameAllocator {
fn allocate_frame(&mut self) -> Option<UnusedPhysFrame> { fn allocate_frame(&mut self) -> Option<PhysFrame> {
let frame = self.usable_frames().nth(self.next); let frame = self.usable_frames().nth(self.next);
self.next += 1; self.next += 1;
frame frame