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The great 64-bit rewrite

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* We did loose tasking and only have a paging skeleton, but hey it took like 4 months so i'm happy that there's something :p
This commit is contained in:
Tom-on
2026-02-08 13:04:39 +01:00
parent d9471572b8
commit 50a1d6198e
42 changed files with 2206 additions and 1786 deletions
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kernel/include/paging.h
+26 -31
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@@ -3,39 +3,34 @@
#include <kernel.h>
#define PHYS_ADDR(_a) ((_a) & ~0xFFF)
#define PAGE_FLAG_PRESENT (1 << 0) // Page is present in the table
#define PAGE_FLAG_WRITE (1 << 1) // Read-write
#define PAGE_FLAG_USER (1 << 2) // User-mode (DPL3) access allowed
#define PAGE_FLAG_PWT (1 << 3) // Page write-thru
#define PAGE_FLAG_NOCACHE (1 << 4) // Cache disable
#define PAGE_FLAG_ACCESSED (1 << 5) // Indicates whether page was accessed
#define PAGE_FLAG_DIRTY (1 << 6) // Page size (valid for PD and PDPT only)
#define PAGE_FLAG_PAT (1 << 7) // Page Attribute Table (valid for PT only)
#define PAGE_FLAG_GLOBAL (1 << 8) // Indicates the page is globally cached
#define PAGE_FLAG_SHARED (1 << 9) // Userland page is shared
// Region caching according to the Limine protocol
#define PAGE_FLAG_CACHE (PAGE_FLAG_PWT | PAGE_FLAG_PAT)
// The kernels pagedir
#define PAGEDIR ((uint32_t*)(0xFFFFF000))
#define PAGETAB(_i) ((uint32_t*)(0xFFC00000 + ((_i) << 12)))
#define PAGE_SIZE 0x1000
#define PAGE_SIZE_LARGE 0x200000
#define PAGE_SIZE_HUGE 0x40000000
#define PAGE_SIZE 4096
#define PHYS_ADDR(_x) ((_x) & ~0xFFF)
#define PAGE_FLAG_PRESENT (1 << 0)
#define PAGE_FLAG_WRITE (1 << 1)
#define PAGE_FLAG_USER (1 << 2)
#define PAGE_FLAG_PWT (1 << 3)
#define PAGE_FLAG_NOCACHE (1 << 4)
#define PAGE_FLAG_ACCESSED (1 << 5)
#define PAGE_FLAG_DIRTY (1 << 6) // AVL in PDE where PS = 0
#define PAGE_FLAG_PS (1 << 7) // If PS = 1 then directly maps a 4MB page
#define PAGE_FLAG_GLOBAL (1 << 8)
// bits 9-11 are AVL - OS is free to use these as its own flags
#define PAGE_FLAG_OWNER (1 << 9)
extern uint32_t init_pagedir[1024]; // Defined in entry.s for initial paging
extern size_t pag_page_count;
int pag_init(void);
void pag_register_temp_frame(uint32_t target);
uint32_t pag_temp_frame(void);
void pag_map(uint32_t vaddr, uint32_t paddr, uint32_t flags);
uint32_t pag_umap(uint32_t vaddr);
uint32_t pag_virt_to_phys(uint32_t vaddr);
uint32_t* pag_get_pagedir();
void pag_set_pagedir(uint32_t* pagedir);
void pag_sync_pagedir();
uint32_t* pag_alloc_pagedir();
void pag_free_pagedir(uint32_t* pagedir);
int pag_init(void);
void pag_map(size_t vaddr, size_t paddr, size_t flags);
size_t pag_umap(size_t vaddr);
size_t pag_virt_to_phys(size_t vaddr);
size_t* pag_get_pagedir();
size_t* pag_get_task_pagedir(void* task);
void pag_set_pagedir(size_t* pagedir);
size_t* pag_alloc_pagedir();
void pag_free_pagedir(size_t* pagedir);
void pag_invalidate(size_t vaddr);
#endif