48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
#include "mem32.h"
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#include "kdef32.h"
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int32 HYPKERNEL32 hk_set_segment_descriptor(uint8* const gdt, const segment_descriptor* const seg_desc)
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{
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if (gdt == NULL)
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return -1;
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gdt[0] = (uint8)(seg_desc->limit & 0xFF);
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gdt[1] = (uint8)((seg_desc->limit >> 8) & 0xFF);
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gdt[6] = gdt[6] | (uint8)((seg_desc->limit >> 16) & 0xFF);
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gdt[2] = (uint8)(seg_desc->base & 0xFF);
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gdt[3] = (uint8)((seg_desc->base >> 8) & 0xFF);
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gdt[4] = (uint8)((seg_desc->base >> 16) & 0xFF);
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gdt[7] = (uint8)((seg_desc->base >> 24) & 0xFF);
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gdt[5] = (uint8)((seg_desc->type & 0xF) + ((seg_desc->Sys & 0x1) << 4) + ((seg_desc->DPL & 0x3) << 5) + ((seg_desc->Pr & 0x1 ) << 7));
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gdt[6] = gdt[6] | (uint8)(((seg_desc->Avl & 0x1) + ((seg_desc->x64 & 0x1) << 1) + ((seg_desc->Sz & 0x1) << 2) + ((seg_desc->Gr & 0x1) << 3)) << 4);
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return 0;
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}
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int32 HYPKERNEL32 hk_set_page_table_entry_32(uint32* dest,uint32 base,uint32 flags)
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{
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if (dest == NULL)
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return -1;
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*dest = (base & 0xFFFFF000) + (flags & 0x0FFF);
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return 0;
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}
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int32 HYPKERNEL32 hk_set_page_directory_entry_32(uint32* dest, uint32 base, uint32 flags)
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{
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if (dest == NULL)
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return -1;
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*dest = (base & 0xFFFFF000) + (flags & 0x0FFF);
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return 0;
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}
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int32 HYPKERNEL32 hk_map_physcial_address_32(uint32* page_directory_base, uint32 physical_addr, uint32 virtual_addr, uint32 flags)
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{
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if (page_directory_base == NULL)
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return -1;
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uint32 pde_idx = virtual_addr >> 22;
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uint32 pde = *(page_directory_base + pde_idx * 4);
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//uint32 page_table_base = ;
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//uint32 pte_idx = ;
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return 0;
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}
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