Bananymous/banan-os
1
1
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Kernel: rework the whole PageTable structure

Browse Source 
We now have page table structure for kernel memory which is shared
between all processes.
This commit is contained in:
Bananymous
2023-07-05 23:41:35 +03:00
parent 60fe5a656c
commit 4086d7c3be
13 changed files with 215 additions and 165 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
kernel/include/kernel/Memory/PageTable.h
View File

@@ -27,9 +27,6 @@ namespace Kernel
static BAN::ErrorOr<PageTable*> create_userspace();
~PageTable();
void identity_map_page(paddr_t, flags_t);
void identity_map_range(paddr_t, size_t bytes, flags_t);
void unmap_page(vaddr_t);
void unmap_range(vaddr_t, size_t bytes);
@@ -42,10 +39,9 @@ namespace Kernel
bool is_page_free(vaddr_t) const;
bool is_range_free(vaddr_t, size_t bytes) const;
vaddr_t get_free_page() const;
vaddr_t get_free_page(vaddr_t first_address = PAGE_SIZE) const;
vaddr_t get_free_contiguous_pages(size_t page_count, vaddr_t first_address = PAGE_SIZE) const;
void invalidate(vaddr_t);
void load();
void lock() const { m_lock.lock(); }
@@ -57,10 +53,19 @@ namespace Kernel
PageTable() = default;
uint64_t get_page_data(vaddr_t) const;
void initialize_kernel();
void map_kernel_memory();
void invalidate(vaddr_t);
private:
paddr_t m_highest_paging_struct { 0 };
mutable RecursiveSpinLock m_lock;
};
static constexpr size_t range_page_count(vaddr_t start, size_t bytes)
{
size_t first_page = start / PAGE_SIZE;
size_t last_page = BAN::Math::div_round_up<size_t>(start + bytes, PAGE_SIZE);
return last_page - first_page + 1;
}
}