55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
#include "../memory/pageframealloc.h"
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#include "../boot/multiboot/data.h"
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#include "pageframe.h"
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#include "../debug/output.h"
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#include "../memory/config.h"
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uint8_t PageFrameAllocator::bitmap[4294967296 / 4096 / 8];
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void PageFrameAllocator::init(){
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Multiboot::Memory* memory_map_entry = Multiboot::getMemoryMap();
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dout << "kernel start: " << ___KERNEL_START___;
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dout << " kernel end: " << ___KERNEL_END___ << endl;
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while(memory_map_entry != 0){
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void* start = memory_map_entry->getStartAddress();
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void* end = memory_map_entry->getEndAddress();
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bool available = memory_map_entry->isAvailable();
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dout << "Memory: " << hex << start << " to " << end << " is available: " << available << "." << endl;
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//TODO priotity for conflicting regions
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for(uint64_t i = (uint64_t)start; i < (uint64_t)end; i += 4096){
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uint64_t pg = i/4096;
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if(available)
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bitmap[pg/8] |= 1 << pg%8;
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else
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bitmap[pg/8] &= ~(1 << pg%8);
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}
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memory_map_entry = memory_map_entry->getNext();
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}
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for(uint64_t i = (uint64_t)&___KERNEL_START___; i < (uint64_t)&___KERNEL_END___; i += 4096){
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uint64_t pg = i/4096;
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bitmap[pg/8] &= ~(1 << pg%8);
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}
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}
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void PageFrameAllocator::stats(){
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}
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PageFrame* PageFrameAllocator::alloc(bool kernel){
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(void) kernel;
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return 0;
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}
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void PageFrameAllocator::free(PageFrame* frame){
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(void) frame;
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}
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void PageFrameAllocator::free(uintptr_t addr){
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(void) addr;
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}
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