Karina
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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// Copyright (c) 2026 0xKarinyash
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#pragma once
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#include "bootinfo.h"
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#include <types.h>
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#define kVMPageSize 4096
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#define kVMSafeSpaceStartAddress 0x100000
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#define kVMBlocksPerByte 8
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#define BITMAP_BYTE_INDEX(address) ((address / kVMPageSize) / kVMBlocksPerByte)
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#define BITMAP_BIT_OFFSET(address) ((address / kVMPageSize) % kVMBlocksPerByte)
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#define BITMAP_TEST(bitmap, address) (bitmap[BITMAP_BYTE_INDEX(address)] & (1 << BITMAP_BIT_OFFSET(address)))
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#define BITMAP_SET(bitmap, address) (bitmap[BITMAP_BYTE_INDEX(address)] |= (1 << BITMAP_BIT_OFFSET(address)))
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#define BITMAP_UNSET(bitmap, address) (bitmap[BITMAP_BYTE_INDEX(address)] &= ~(1 << BITMAP_BIT_OFFSET(address)))
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typedef struct {
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UInt32 type;
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UInt32 padding;
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UInt64 physicalStart;
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UInt64 virtualStart;
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UInt64 pageCount;
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UInt64 attributes;
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} __attribute__((packed)) OSMemoryDescriptor;
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typedef enum {
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kOSMemoryTypeReserved,
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kOSMemoryTypeLoaderCode,
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kOSMemoryTypeLoaderData,
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kOSMemoryTypeBootServicesCode,
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kOSMemoryTypeBootServicesData,
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kOSMemoryTypeRuntimeServicesCode,
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kOSMemoryTypeRuntimeServicesData,
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kOSMemoryTypeConventional,
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kOSMemoryTypeUnusable,
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kOSMemoryTypeACPIReclaim,
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kOSMemoryTypeACPINonVolatile,
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kOSMemoryTypeMappedIO,
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kOSMemoryTypeMappedIOPortSpace,
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kOSMemoryTypePalCode,
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kOSMemoryTypePersistent,
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kOSMemoryTypeMax
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} OSMemoryType;
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UInt64 VMPhysicalMemoryGetTotalMemorySize();
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void VMPhysicalMemoryInitialize(BIMemoryMap* mmap);
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void* VMPhysicalMemoryAllocatePage();
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void VMPhysicalMemoryFreePage(void* addr);
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