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Kernel: Start adding support for E1000 network adapters.

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This commit is contained in:
Andreas Kling 2019-03-10 15:25:33 +01:00
parent 0c806bfa25
commit 405413c354
12 changed files with 271 additions and 3 deletions
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12
Kernel/MemoryManager.cpp
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@ -150,7 +150,7 @@ auto MemoryManager::ensure_pte(PageDirectory& page_directory, LinearAddress ladd
pde.set_present(true);
pde.set_writable(true);
} else {
ASSERT(&page_directory != m_kernel_page_directory.ptr());
//ASSERT(&page_directory != m_kernel_page_directory.ptr());
auto page_table = allocate_page_table(page_directory, page_directory_index);
#ifdef MM_DEBUG
dbgprintf("MM: PD K%x (%s) at P%x allocated page table #%u (for L%x) at P%x\n",
@ -456,6 +456,16 @@ void MemoryManager::flush_tlb(LinearAddress laddr)
asm volatile("invlpg %0": :"m" (*(char*)laddr.get()) : "memory");
}
void MemoryManager::map_for_kernel(LinearAddress laddr, PhysicalAddress paddr)
{
auto pte = ensure_pte(kernel_page_directory(), laddr);
pte.set_physical_page_base(paddr.get());
pte.set_present(true);
pte.set_writable(true);
pte.set_user_allowed(false);
flush_tlb(laddr);
}
byte* MemoryManager::quickmap_page(PhysicalPage& physical_page)
{
ASSERT_INTERRUPTS_DISABLED();