feat: kmem-core
#602
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feat: kmem-core
#602
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JonasKruckenberg
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hardware address space chore: rename to kmem-core feat(kmem-core): ASID type feat(kmem-core): interface for architecture-specific functionality This change (re)-introduces the `Arch` trait defining the interface that architecture-specific modules in the `arch/` module must implement. feat(kmem-core): memory mode abstraction feat(kmem-core): `FrameAllocator` trait feat(kmem-core): riscv64 architecture implementation feat(kmem-core): test emulation support feat(kmem-core): flush type feat(kmem-core): implement AddressSpace::lookup feat(kmem-core): implement `AddressSpace::set_attributes` feat(kmem-core): implement `AddressSpace::remap` hardware address space
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This PR extracts out the pretty substantial
kmem-corecomponent from the loader and kernel responsible for hardware-side address space management. This PR does not replace the loader or kernels implementation yet, that is left for a follow-up.What this implements:
MemoryModeabstracts the page table shape (number of levels, number of entries per level, which levels support leaves)Archprovides the internal architecture-specific interface.RiscV64,RISCV_SV39,RISCV_SV48, andRISCV_SV57provide RISC-VArchimplementations andMemoryModedefinitions.EmulateArchprovides an emulator parameterized by an innerArchimpl that can be used in tests.src/bootstrapimplements address space bootstrapping for use in the loader.AddressSpaceis the main type of the crate, it represents an hardware address space.AddressSpace::map_contiguousmaps a contiguous range of physical addresses at a virtual address.AddressSpace::remap_contiguousremaps a virtual address rangeAddressSpace::set_attributesupdates the attributes for a virtual address rangeAddressSpace::unmapunmaps a virtual address range.