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banan-os
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update main #1

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Sinipelto merged 240 commits from Bananymous/banan-os:main into main 2023-11-20 13:20:51 +02:00
Conversation 0 Commits 240 Files Changed 263 +3 -28
1 changed files with 3 additions and 28 deletions
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Showing only changes of commit a66c3bdae5 - Show all commits

31
kernel/kernel/Memory/VirtualRange.cpp
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@ -56,39 +56,14 @@ namespace Kernel
ASSERT(vaddr_start < vaddr_end);
ASSERT(vaddr_end - vaddr_start + 1 >= size / PAGE_SIZE);
VirtualRange* result_ptr = new VirtualRange(page_table);
if (result_ptr == nullptr)
return BAN::Error::from_errno(ENOMEM);
auto result = BAN::UniqPtr<VirtualRange>::adopt(result_ptr);
result->m_kmalloc = false;
result->m_vaddr = 0;
result->m_size = size;
result->m_flags = flags;
vaddr_t vaddr = page_table.reserve_free_contiguous_pages(size / PAGE_SIZE, vaddr_start, vaddr_end);
if (vaddr == 0)
return BAN::Error::from_errno(ENOMEM);
ASSERT(vaddr + size <= vaddr_end);
result->m_vaddr = vaddr;
size_t needed_pages = size / PAGE_SIZE;
for (size_t i = 0; i < needed_pages; i++)
{
paddr_t paddr = Heap::get().take_free_page();
if (paddr == 0)
{
for (size_t j = 0; j < i; j++)
Heap::get().release_page(page_table.physical_address_of(vaddr + j * PAGE_SIZE));
page_table.unmap_range(vaddr, size);
result->m_vaddr = 0;
return BAN::Error::from_errno(ENOMEM);
}
page_table.map_page_at(paddr, vaddr + i * PAGE_SIZE, flags);
}
return result;
LockGuard _(page_table);
page_table.unmap_range(vaddr, size); // We have to unmap here to allow reservation in create_to_vaddr()
return create_to_vaddr(page_table, vaddr, size, flags);
}
BAN::ErrorOr<BAN::UniqPtr<VirtualRange>> VirtualRange::create_kmalloc(size_t size)