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Flush the TLB after modifying page tables.

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This is a very inefficient naive implementation, but it gets us going.
Mapping tasks in and out of a shared address space now totally works.
This commit is contained in:
Andreas Kling 2018-10-23 11:03:56 +02:00
parent 56ed448424
commit 98f76f0153
3 changed files with 11 additions and 2 deletions
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10
Kernel/MemoryManager.cpp
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@ -156,6 +156,14 @@ byte* MemoryManager::quickMapOnePage(PhysicalAddress physicalAddress)
return (byte*)(4 * MB);
}
void MemoryManager::flushTLB()
{
asm volatile(
"mov %cr3, %eax\n"
"mov %eax, %cr3\n"
);
}
bool MemoryManager::unmapRegion(Task& task, Task::Region& region)
{
auto& zone = *region.zone;
@ -169,6 +177,7 @@ bool MemoryManager::unmapRegion(Task& task, Task::Region& region)
// kprintf("MM: >> Unmapped L%x => P%x <<\n", laddr, zone.m_pages[i].get());
}
flushTLB();
return true;
}
@ -194,6 +203,7 @@ bool MemoryManager::mapRegion(Task& task, Task::Region& region)
//kprintf("MM: >> Mapped L%x => P%x <<\n", laddr, zone.m_pages[i].get());
}
flushTLB();
return true;
}