Module ostd::mm

Virtual memory (VM).

Re-exports

• pub use self::frame::options::FrameAllocOptions;
• pub use self::frame::Frame;
• pub use self::frame::FrameVec;
• pub use self::frame::FrameVecIter;
• pub use self::frame::Segment;

Modules

• frame
  Untyped physical memory management.

Structs

• DmaCoherent
  A coherent (or consistent) DMA mapping, which guarantees that the device and the CPU can access the data in parallel.
• DmaStream
  A streaming DMA mapping. Users must synchronize data before reading or after writing to ensure consistency.
• DmaStreamSlice
  A slice of streaming DMA mapping.
• KernelSpace
  A marker structure used for VmReader and VmWriter, representing their operated memory scope is in kernel space.
• PageFlags
  Page protection permissions and access status.
• PageProperty
  The property of a mapped virtual memory page.
• UserSpace
  A marker structure used for VmReader and VmWriter, representing their operated memory scope is in user space.
• VmMapOptions
  Options for mapping physical memory pages into a VM address space. See VmSpace::map.
• VmReader
  VmReader is a reader for reading data from a contiguous range of memory.
• VmSpace
  Virtual memory space.
• VmWriter
  VmWriter is a writer for writing data to a contiguous range of memory.

Enums

• CachePolicy
  A type to control the cacheability of the main memory.
• DmaDirection
  DmaDirection limits the data flow direction of DmaStream and prevents users from reading and writing to DmaStream unexpectedly.

Constants

• MAX_USERSPACE_VADDR
  The maximum virtual address of user space (non inclusive).
• PAGE_SIZE
  The page size

Statics

• FRAMEBUFFER_REGIONS
  Memory regions used for frame buffer.

Traits

• HasDaddr
  A trait for types that have mapped address in the device address space.
• HasPaddr
  Gets physical address trait
• VmIo
  A trait that enables reading/writing data from/to a VM object, e.g., VmSpace, FrameVec, and Frame.

Functions

• is_page_aligned
  Checks if the given address is page-aligned.

Type Aliases

• Daddr
  The devide address.
• Paddr
  Physical addresses.
• PagingLevel
  The level of a page table node or a frame.
• Vaddr
  Virtual addresses.