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Kernel: Optimize PageTable address space reservation

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I only did this for the 64 bit target.
This commit is contained in:
Bananymous
2026-05-20 02:01:16 +03:00
parent 4f5f84bb5b
commit 94f92d982c
3 changed files with 139 additions and 56 deletions
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26
kernel/arch/i686/PageTable.cpp
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@@ -609,30 +609,24 @@ namespace Kernel
return true;
}
bool PageTable::reserve_page(vaddr_t vaddr, bool only_free, bool send_smp_message)
void PageTable::reserve_page(vaddr_t vaddr)
{
SpinLockGuard _(m_lock);
ASSERT(vaddr % PAGE_SIZE == 0);
if (only_free && !is_page_free(vaddr))
return false;
map_page_at(0, vaddr, Flags::Reserved, MemoryType::Normal, send_smp_message);
return true;
SpinLockGuard _(m_lock);
ASSERT(is_page_free(vaddr));
map_page_at(0, vaddr, Flags::Reserved, MemoryType::Normal, false);
}
bool PageTable::reserve_range(vaddr_t vaddr, size_t bytes, bool only_free)
void PageTable::reserve_range(vaddr_t vaddr, size_t bytes)
{
if (size_t rem = bytes % PAGE_SIZE)
bytes += PAGE_SIZE - rem;
ASSERT(vaddr % PAGE_SIZE == 0);
SpinLockGuard _(m_lock);
if (only_free && !is_range_free(vaddr, bytes))
return false;
ASSERT(is_range_free(vaddr, bytes));
for (size_t offset = 0; offset < bytes; offset += PAGE_SIZE)
reserve_page(vaddr + offset, true, false);
invalidate_range(vaddr, bytes / PAGE_SIZE, true);
return true;
reserve_page(vaddr + offset);
}
vaddr_t PageTable::reserve_free_page(vaddr_t first_address, vaddr_t last_address)
@@ -687,7 +681,7 @@ namespace Kernel
vaddr |= (vaddr_t)pdpte << 30;
vaddr |= (vaddr_t)pde << 21;
vaddr |= (vaddr_t)pte << 12;
ASSERT(reserve_page(vaddr));
reserve_page(vaddr);
return vaddr;
}
unmap_fast_page(2);
@@ -705,7 +699,7 @@ namespace Kernel
{
if (is_page_free(vaddr))
{
ASSERT(reserve_page(vaddr));
reserve_page(vaddr);
return vaddr;
}
}
@@ -738,7 +732,7 @@ namespace Kernel
}
if (valid)
{
ASSERT(reserve_range(vaddr, page_count * PAGE_SIZE));
reserve_range(vaddr, page_count * PAGE_SIZE);
return vaddr;
}
}