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

Kernel: Remove unnused features from VirtualRange

Browse Source 
On-demand paging has not been used ever since I made userspace stack be
a normal MemoryRegion.
This commit is contained in:
Bananymous
2026-04-21 19:58:09 +03:00
parent eea0154f18
commit b74812d669
10 changed files with 53 additions and 136 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/include/kernel/Memory/MemoryRegion.h
View File

@@ -9,12 +9,6 @@
namespace Kernel
{
struct AddressRange
{
vaddr_t start;
vaddr_t end;
};
class MemoryRegion
{
BAN_NON_COPYABLE(MemoryRegion);

6
kernel/include/kernel/Memory/Types.h
View File

@@ -23,4 +23,10 @@ namespace Kernel
using vaddr_t = uintptr_t;
using paddr_t = uint64_t;
struct AddressRange
{
vaddr_t start;
vaddr_t end;
};
}

21
kernel/include/kernel/Memory/VirtualRange.h
View File

@@ -14,42 +14,27 @@ namespace Kernel
BAN_NON_MOVABLE(VirtualRange);
public:
// Create virtual range to fixed virtual address
static BAN::ErrorOr<BAN::UniqPtr<VirtualRange>> create_to_vaddr(PageTable&, vaddr_t, size_t, PageTable::flags_t flags, bool preallocate_pages, bool add_guard_pages);
// Create virtual range to virtual address range
static BAN::ErrorOr<BAN::UniqPtr<VirtualRange>> create_to_vaddr_range(PageTable&, vaddr_t vaddr_start, vaddr_t vaddr_end, size_t, PageTable::flags_t flags, bool preallocate_pages, bool add_guard_pages);
static BAN::ErrorOr<BAN::UniqPtr<VirtualRange>> create_to_vaddr_range(PageTable&, AddressRange address_range, size_t, PageTable::flags_t flags, bool add_guard_pages);
~VirtualRange();
vaddr_t vaddr() const { return m_vaddr + (m_has_guard_pages ? PAGE_SIZE : 0); }
size_t size() const { return m_size - (m_has_guard_pages ? 2 * PAGE_SIZE : 0); }
PageTable::flags_t flags() const { return m_flags; }
paddr_t paddr_of(vaddr_t vaddr) const
{
ASSERT(vaddr % PAGE_SIZE == 0);
const size_t index = (vaddr - this->vaddr()) / PAGE_SIZE;
ASSERT(index < m_paddrs.size());
const paddr_t paddr = m_paddrs[index];
ASSERT(paddr);
return paddr;
}
paddr_t paddr_of(vaddr_t vaddr) const { return m_page_table.physical_address_of(vaddr & PAGE_ADDR_MASK); }
bool contains(vaddr_t address) const { return vaddr() <= address && address < vaddr() + size(); }
BAN::ErrorOr<bool> allocate_page_for_demand_paging(vaddr_t address);
private:
VirtualRange(PageTable&, bool preallocated, bool has_guard_pages, vaddr_t, size_t, PageTable::flags_t);
VirtualRange(PageTable&, bool has_guard_pages, vaddr_t, size_t, PageTable::flags_t);
BAN::ErrorOr<void> initialize();
private:
PageTable& m_page_table;
const bool m_preallocated;
const bool m_has_guard_pages;
const vaddr_t m_vaddr;
const size_t m_size;
const PageTable::flags_t m_flags;
BAN::Vector<paddr_t> m_paddrs;
SpinLock m_lock;
friend class BAN::UniqPtr<VirtualRange>;