diff options
| author | Anton Kling <anton@kling.gg> | 2024-12-09 18:35:54 +0100 |
|---|---|---|
| committer | Anton Kling <anton@kling.gg> | 2024-12-09 19:17:57 +0100 |
| commit | e7272b29feb855f4678c5c510d331f297351d3a2 (patch) | |
| tree | a1961628a7466af9320f14827cb528ac688ddb76 /kernel/includes/mmu.h | |
| parent | 906923ad3f2ecb2c73d286924e2ac05f8f3ae502 (diff) | |
mmu: Make certain allocations physical and virtual mapping linear
Previously it was possible for fragmentation to occur and as a result
certain allocations would have a linear virtual address space but not a
linear physical address space. This is bad since a lot of calls to
kmalloc_align rely upon both being linear, it has now been changed such
that all allocations done by kmalloc_align now guarantee this mapping
holds for both virtual and physical addresses.
It was due to oversight and sheer luck that this had been working for so
long.
Diffstat (limited to 'kernel/includes/mmu.h')
| -rw-r--r-- | kernel/includes/mmu.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/includes/mmu.h b/kernel/includes/mmu.h index 319169f..580b40e 100644 --- a/kernel/includes/mmu.h +++ b/kernel/includes/mmu.h @@ -42,6 +42,7 @@ int mmu_allocate_region(void *ptr, size_t n, mmu_flags flags, PageDirectory *pd); void mmu_free_pagedirectory(PageDirectory *pd); int mmu_allocate_shared_kernel_region(void *rc, size_t n); +int mmu_allocate_kernel_linear_virtual_to_physical_mapping(void *rc, size_t n); void *mmu_find_unallocated_virtual_range(void *addr, size_t length); void mmu_remove_virtual_physical_address_mapping(void *ptr, size_t length); void mmu_free_address_range(void *ptr, size_t length, PageDirectory *pd); @@ -60,7 +61,7 @@ PageDirectory *get_active_pagedirectory(void); void switch_page_directory(PageDirectory *directory); PageDirectory *clone_directory(PageDirectory *original); void *virtual_to_physical(void *address, PageDirectory *directory); -void *ksbrk(size_t s); +void *ksbrk(size_t s, int enforce_linear); void *ksbrk_physical(size_t s, void **physical); int write_to_frame(u32 frame_address, u8 on); |