implement proper IRQL, DPCs, kernel and user APCs, alertable waits, async file I/O with cancellation, trap frames, selftests, a real driver/device model, native async FAT32, VFAT dotfile fixes, syscall ABI cleanup, async_apc and async_cancel tests, POSIX multi-volume paths, and pimp the readme.
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@@ -1,73 +1,73 @@
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#pragma once
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// mm_virt.h - virtual memory manager (VMM)
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// Manages the single shared PML4, kernel pool, and user heap.
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#include <stdint.h>
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#include <stddef.h>
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#include <mm_phys.h>
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#include <ke_status.h>
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// ---------------------------------------------------------------------------
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// Page flags (x86-64 PTE bits)
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// ---------------------------------------------------------------------------
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#define PAGE_PRESENT (1ULL << 0)
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#define PAGE_WRITE (1ULL << 1)
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#define PAGE_USER (1ULL << 2)
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#define PAGE_NOCACHE (1ULL << 4)
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#define PAGE_NX (1ULL << 63)
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// ---------------------------------------------------------------------------
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// Virtual address space constants
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// ---------------------------------------------------------------------------
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#define USER_BASE 0x0000000000001000ULL
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#define USER_LIMIT 0x00007FFFFFFFF000ULL
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#define KERNEL_BASE 0xFFFF800000000000ULL
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#define PHYS_MAP_BASE 0xFFFF880000000000ULL
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#define POOL_BASE 0xFFFFC00000000000ULL
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#define POOL_LIMIT 0xFFFFE00000000000ULL
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// ---------------------------------------------------------------------------
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// Initialisation
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// ---------------------------------------------------------------------------
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// Called by KernelMain after MmInitializePhysical.
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// bootPml4Phys: the PML4 set up by the bootloader.
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// poolSize: initial reservation for kernel pool (bytes, page-aligned).
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void MmInitializeVirtual(PHYSICAL_ADDRESS bootPml4Phys, size_t poolSize);
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// Install the shared PML4 into CR3. Called once at the end of KernelMain init.
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void MmActivate(void);
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// ---------------------------------------------------------------------------
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// Page mapping
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// ---------------------------------------------------------------------------
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__declspec(dllexport) KSTATUS MmMapPage(uintptr_t virt, PHYSICAL_ADDRESS phys, uint64_t flags);
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__declspec(dllexport) KSTATUS MmUnmapPage(uintptr_t virt);
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// Modify protection flags on an already-mapped virtual range.
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// 'flags' is the complete new set of PAGE_* bits - it replaces the old flags
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// entirely (except the physical address, which is preserved).
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// Returns STATUS_NOT_FOUND if any page in the range is not mapped.
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__declspec(dllexport) KSTATUS MmSetPageProtect(uintptr_t virt, size_t size, uint64_t flags);
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// Walk the page tables to translate a virtual address to physical.
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// Returns 0 if the address is not mapped.
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__declspec(dllexport) PHYSICAL_ADDRESS MmGetPhysicalAddress(uintptr_t virt);
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// ---------------------------------------------------------------------------
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// Kernel pool - ring 0 only, never PAGE_USER.
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// Best-fit free-list allocator, thread-safe via spinlock.
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// ---------------------------------------------------------------------------
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__declspec(dllexport) void* MmAllocatePool(size_t size);
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__declspec(dllexport) void MmFreePool(void* ptr);
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__declspec(dllexport) void* MmReallocatePool(void* ptr, size_t newSize);
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// ---------------------------------------------------------------------------
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// User heap - shared flat space, ring 3 accessible.
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// All allocations are PAGE_PRESENT | PAGE_WRITE | PAGE_USER.
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// ---------------------------------------------------------------------------
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__declspec(dllexport) void* MmAllocateUserMemory(size_t size);
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__declspec(dllexport) void MmFreeUserMemory(void* ptr, size_t size);
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__declspec(dllexport) void* MmReallocateUserMemory(void* ptr, size_t newSize);
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size_t MmGetKernelPoolUsage(void);
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size_t MmGetUserHeapUsage(void);
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#pragma once
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// mm_virt.h - virtual memory manager (VMM)
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// Manages the single shared PML4, kernel pool, and user heap.
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#include <stdint.h>
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#include <stddef.h>
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#include <mm_phys.h>
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#include <ke_status.h>
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// ---------------------------------------------------------------------------
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// Page flags (x86-64 PTE bits)
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// ---------------------------------------------------------------------------
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#define PAGE_PRESENT (1ULL << 0)
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#define PAGE_WRITE (1ULL << 1)
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#define PAGE_USER (1ULL << 2)
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#define PAGE_NOCACHE (1ULL << 4)
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#define PAGE_NX (1ULL << 63)
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// ---------------------------------------------------------------------------
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// Virtual address space constants
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// ---------------------------------------------------------------------------
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#define USER_BASE 0x0000000000001000ULL
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#define USER_LIMIT 0x00007FFFFFFFF000ULL
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#define KERNEL_BASE 0xFFFF800000000000ULL
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#define PHYS_MAP_BASE 0xFFFF880000000000ULL
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#define POOL_BASE 0xFFFFC00000000000ULL
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#define POOL_LIMIT 0xFFFFE00000000000ULL
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// ---------------------------------------------------------------------------
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// Initialisation
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// ---------------------------------------------------------------------------
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// Called by KernelMain after MmInitializePhysical.
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// bootPml4Phys: the PML4 set up by the bootloader.
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// poolSize: initial reservation for kernel pool (bytes, page-aligned).
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void MmInitializeVirtual(PHYSICAL_ADDRESS bootPml4Phys, size_t poolSize);
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// Install the shared PML4 into CR3. Called once at the end of KernelMain init.
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void MmActivate(void);
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// ---------------------------------------------------------------------------
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// Page mapping
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// ---------------------------------------------------------------------------
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__declspec(dllexport) KSTATUS MmMapPage(uintptr_t virt, PHYSICAL_ADDRESS phys, uint64_t flags);
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__declspec(dllexport) KSTATUS MmUnmapPage(uintptr_t virt);
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// Modify protection flags on an already-mapped virtual range.
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// 'flags' is the complete new set of PAGE_* bits - it replaces the old flags
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// entirely (except the physical address, which is preserved).
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// Returns STATUS_NOT_FOUND if any page in the range is not mapped.
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__declspec(dllexport) KSTATUS MmSetPageProtect(uintptr_t virt, size_t size, uint64_t flags);
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// Walk the page tables to translate a virtual address to physical.
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// Returns 0 if the address is not mapped.
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__declspec(dllexport) PHYSICAL_ADDRESS MmGetPhysicalAddress(uintptr_t virt);
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// ---------------------------------------------------------------------------
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// Kernel pool - ring 0 only, never PAGE_USER.
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// Best-fit free-list allocator, thread-safe via spinlock.
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// ---------------------------------------------------------------------------
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__declspec(dllexport) void* MmAllocatePool(size_t size);
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__declspec(dllexport) void MmFreePool(void* ptr);
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__declspec(dllexport) void* MmReallocatePool(void* ptr, size_t newSize);
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// ---------------------------------------------------------------------------
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// User heap - shared flat space, ring 3 accessible.
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// All allocations are PAGE_PRESENT | PAGE_WRITE | PAGE_USER.
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// ---------------------------------------------------------------------------
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__declspec(dllexport) void* MmAllocateUserMemory(size_t size);
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__declspec(dllexport) void MmFreeUserMemory(void* ptr);
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__declspec(dllexport) void* MmReallocateUserMemory(void* ptr, size_t newSize);
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size_t MmGetKernelPoolUsage(void);
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size_t MmGetUserHeapUsage(void);
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