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Kernel: Change Region allocation helpers

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We now can create a cacheable Region, so when map() is called, if a
Region is cacheable then all the virtual memory space being allocated
to it will be marked as not cache disabled.

In addition to that, OS components can create a Region that will be
mapped to a specific physical address by using the appropriate helper
method.
This commit is contained in:
Liav A 2020-01-09 23:29:31 +02:00 • committed by Andreas Kling
parent b913e30011
commit d2b41010c5
7 changed files with 77 additions and 56 deletions
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7
Kernel/VM/MemoryManager.h
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@ -62,9 +62,10 @@ public:
void map_for_kernel(VirtualAddress, PhysicalAddress, bool cache_disabled = false);
OwnPtr<Region> allocate_kernel_region(size_t, const StringView& name, u8 access, bool user_accessible = false, bool should_commit = true);
OwnPtr<Region> allocate_kernel_region_with_vmobject(VMObject&, size_t, const StringView& name, u8 access);
OwnPtr<Region> allocate_user_accessible_kernel_region(size_t, const StringView& name, u8 access);
OwnPtr<Region> allocate_kernel_region(size_t, const StringView& name, u8 access, bool user_accessible = false, bool should_commit = true, bool cacheable = true);
OwnPtr<Region> allocate_kernel_region(PhysicalAddress, size_t, const StringView& name, u8 access, bool user_accessible = false, bool cacheable = false);
OwnPtr<Region> allocate_kernel_region_with_vmobject(VMObject&, size_t, const StringView& name, u8 access, bool user_accessible = false, bool cacheable = false);
OwnPtr<Region> allocate_user_accessible_kernel_region(size_t, const StringView& name, u8 access, bool cacheable = false);
unsigned user_physical_pages() const { return m_user_physical_pages; }
unsigned user_physical_pages_used() const { return m_user_physical_pages_used; }