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KERNEL: Implementing VMM & cleaning up

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Folders now are alll lower case

Started working on the implementation of the Virtual memory manager. Implemented allocate and free page funtionality for as far as I can atm.

Implemented the
This commit is contained in:
Nigel Barink
2022-09-01 20:16:16 +02:00
parent 9893a0bd17
commit 13e9beea79
48 changed files with 195 additions and 173 deletions
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15
source/kernel/boot/boot.s
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@ -17,6 +17,7 @@ stack_top:
.globl boot_page_directory
boot_page_directory:
.skip 4096
.globl boot_page_table
boot_page_table:
.skip 4096
.globl multiboot_page_table
@ -60,15 +61,6 @@ _start:
3: # Map VGA video memory to 0xC03FF00 as "present, writable"
movl $(0x000B8000 | 0x003), boot_page_table - 0xC0000000 + 1023 * 4
# IMPORTANT NOTE FROM WIKI.OSDEV.ORG/HIGHER_HALF_X86_BARE_BONES
# The page table is used at both page directory entry 0 (virtually from 0x0
# to 0x3FFFFF) (thus identity mapping the kernel) and page directory entry
# 768 (virtually from 0xC0000000 to 0xC03FFFFF) (thus mapping it in the
# higher half). The kernel is identity mapped because enabling paging does
# not change the next instruction, which continues to be physical. The CPU
# would instead page fault if there was no identity mapping.\
# Map the page table to both virtual addresss 0x00000000 and 0xC0000000
movl $(boot_page_table - 0xC0000000 + 0x003), boot_page_directory - 0xC0000000 + 0
movl $(boot_page_table - 0xC0000000 + 0x003), boot_page_directory - 0xC0000000 + 768 * 4
@ -112,10 +104,9 @@ isPaging:
jmp 1b
.include "./source/kernel/Memory/GDT/gdt.s"
.include "./source/kernel/memory/gdt/gdt.s"
.include "./source/kernel/irs_table.s"
.include "./source/kernel/irq_table.s"
.include "./source/kernel/Interrupts/idt/idt.s"
.include "./source/kernel/cpu.s"
.include "./source/kernel/interrupts/idt/idt.s"