20 lines
535 B
C++
20 lines
535 B
C++
#include "memory/paging_util.h"
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#include "boot/boot_info.h"
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#define PRESENT_BIT 0x1
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#define READ_WRITE_BIT 0x2
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void InitPaging() {
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uint64_t pml4_addr = 0;
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asm volatile("mov %%cr3, %0;" : "=r"(pml4_addr));
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InitializePml4(pml4_addr);
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}
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void InitializePml4(uint64_t pml4_physical_addr) {
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uint64_t* pml4_virtual = reinterpret_cast<uint64_t*>(
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boot::GetHigherHalfDirectMap() + pml4_physical_addr);
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uint64_t recursive_entry = pml4_physical_addr | PRESENT_BIT | READ_WRITE_BIT;
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pml4_virtual[0x1FE] = recursive_entry;
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}
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