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Kernel: Remove ContiguousVMObject, let AnonymousVMObject do the job

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We don't need an entirely separate VMObject subclass to influence the
location of the physical pages.

Instead, we simply allocate enough physically contiguous memory first,
and then pass it to the AnonymousVMObject constructor that takes a span
of physical pages.
This commit is contained in:
Andreas Kling 2021-07-25 18:37:11 +02:00
parent 9a701eafc4
commit 6a537ceef1
Notes: sideshowbarker 2024-07-18 08:21:13 +09:00
10 changed files with 18 additions and 89 deletions
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6
Kernel/Bus/USB/UHCIController.cpp
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@ -289,7 +289,7 @@ void UHCIController::reset()
}
// Let's allocate the physical page for the Frame List (which is 4KiB aligned)
auto framelist_vmobj = ContiguousVMObject::try_create_with_size(PAGE_SIZE);
auto framelist_vmobj = AnonymousVMObject::try_create_physically_contiguous_with_size(PAGE_SIZE);
m_framelist = MemoryManager::the().allocate_kernel_region_with_vmobject(*framelist_vmobj, PAGE_SIZE, "UHCI Framelist", Region::Access::Write);
dbgln("UHCI: Allocated framelist at physical address {}", m_framelist->physical_page(0)->paddr());
dbgln("UHCI: Framelist is at virtual address {}", m_framelist->vaddr());
@ -311,7 +311,7 @@ UNMAP_AFTER_INIT void UHCIController::create_structures()
{
// Let's allocate memory for both the QH and TD pools
// First the QH pool and all of the Interrupt QH's
auto qh_pool_vmobject = ContiguousVMObject::try_create_with_size(2 * PAGE_SIZE);
auto qh_pool_vmobject = AnonymousVMObject::try_create_physically_contiguous_with_size(2 * PAGE_SIZE);
m_qh_pool = MemoryManager::the().allocate_kernel_region_with_vmobject(*qh_pool_vmobject, 2 * PAGE_SIZE, "UHCI Queue Head Pool", Region::Access::Write);
memset(m_qh_pool->vaddr().as_ptr(), 0, 2 * PAGE_SIZE); // Zero out both pages
@ -331,7 +331,7 @@ UNMAP_AFTER_INIT void UHCIController::create_structures()
m_dummy_qh = allocate_queue_head();
// Now the Transfer Descriptor pool
auto td_pool_vmobject = ContiguousVMObject::try_create_with_size(2 * PAGE_SIZE);
auto td_pool_vmobject = AnonymousVMObject::try_create_physically_contiguous_with_size(2 * PAGE_SIZE);
m_td_pool = MemoryManager::the().allocate_kernel_region_with_vmobject(*td_pool_vmobject, 2 * PAGE_SIZE, "UHCI Transfer Descriptor Pool", Region::Access::Write);
memset(m_td_pool->vaddr().as_ptr(), 0, 2 * PAGE_SIZE);