C++ (Cpp) VADDR_TO_PGOFF Examples

Example #1

status_t
ARMVMTranslationMap32Bit::Query(addr_t va, phys_addr_t *_physical,
	uint32 *_flags)
{
	// default the flags to not present
	*_flags = 0;
	*_physical = 0;

	int index = VADDR_TO_PDENT(va);
	page_directory_entry *pd = fPagingStructures->pgdir_virt;
	if ((pd[index] & ARM_PDE_TYPE_MASK) == 0) {
		// no pagetable here
		return B_OK;
	}

	Thread* thread = thread_get_current_thread();
	ThreadCPUPinner pinner(thread);

	page_table_entry* pt = (page_table_entry*)fPageMapper->GetPageTableAt(
		pd[index] & ARM_PDE_ADDRESS_MASK);
	page_table_entry entry = pt[VADDR_TO_PTENT(va)];

	*_physical = (entry & ARM_PDE_ADDRESS_MASK)
		| VADDR_TO_PGOFF(va);

#if 0 //IRA
	// read in the page state flags
	if ((entry & ARM_PTE_USER) != 0) {
		*_flags |= ((entry & ARM_PTE_WRITABLE) != 0 ? B_WRITE_AREA : 0)
			| B_READ_AREA;
	}

	*_flags |= ((entry & ARM_PTE_WRITABLE) != 0 ? B_KERNEL_WRITE_AREA : 0)
		| B_KERNEL_READ_AREA
		| ((entry & ARM_PTE_DIRTY) != 0 ? PAGE_MODIFIED : 0)
		| ((entry & ARM_PTE_ACCESSED) != 0 ? PAGE_ACCESSED : 0)
		| ((entry & ARM_PTE_PRESENT) != 0 ? PAGE_PRESENT : 0);
#else
	*_flags = B_KERNEL_WRITE_AREA | B_KERNEL_READ_AREA;
	if (*_physical != 0)
		*_flags |= PAGE_PRESENT;
#endif
	pinner.Unlock();

	TRACE("query_tmap: returning pa 0x%lx for va 0x%lx\n", *_physical, va);

	return B_OK;
}

Example #2

File: ARMVMTranslationMap32Bit.cpp Project: SummerSnail2014/haiku

status_t
ARMVMTranslationMap32Bit::QueryInterrupt(addr_t va, phys_addr_t *_physical,
	uint32 *_flags)
{
	*_flags = 0;
	*_physical = 0;

	int index = VADDR_TO_PDENT(va);
	page_directory_entry* pd = fPagingStructures->pgdir_virt;
	if ((pd[index] & ARM_PDE_TYPE_MASK) == 0) {
		// no pagetable here
		return B_OK;
	}

	// map page table entry
	page_table_entry* pt = (page_table_entry*)ARMPagingMethod32Bit::Method()
		->PhysicalPageMapper()->InterruptGetPageTableAt(
			pd[index] & ARM_PDE_ADDRESS_MASK);
	page_table_entry entry = pt[VADDR_TO_PTENT(va)];

	if ((entry & ARM_PTE_TYPE_MASK) != 0)
		*_physical = (entry & ARM_PTE_ADDRESS_MASK) | VADDR_TO_PGOFF(va);

#if 0
	// read in the page state flags
	if ((entry & X86_PTE_USER) != 0) {
		*_flags |= ((entry & X86_PTE_WRITABLE) != 0 ? B_WRITE_AREA : 0)
			| B_READ_AREA;
	}

	*_flags |= ((entry & X86_PTE_WRITABLE) != 0 ? B_KERNEL_WRITE_AREA : 0)
		| B_KERNEL_READ_AREA
		| ((entry & X86_PTE_DIRTY) != 0 ? PAGE_MODIFIED : 0)
		| ((entry & X86_PTE_ACCESSED) != 0 ? PAGE_ACCESSED : 0)
		| ((entry & X86_PTE_PRESENT) != 0 ? PAGE_PRESENT : 0);
#else
	*_flags = B_KERNEL_WRITE_AREA | B_KERNEL_READ_AREA;
	if (*_physical != 0)
		*_flags |= PAGE_PRESENT;
#endif
	return B_OK;
}