sys/vm/vm_phys.c

174     u_long npages, vm_paddr_t low, vm_paddr_t high, u_long alignment,
601 	u_long npages;
611 	npages = 0;
632 		    npages > VM_DMA32_NPAGES_THRESHOLD &&
639 			npages += atop(seg->end - seg->start);
659 	npages = 0;
664 		seg->first_page = &vm_page_array[npages];
665 		npages += atop(seg->end - seg->start);
1091 vm_phys_free_contig(vm_page_t m, u_long npages)
1101 	for (;; npages -= n) {
1112 		if (npages < n)
1117 	/* The residual "npages" is less than "1 << (VM_NFREEORDER - 1)". */
1118 	for (; npages > 0; npages -= n) {
1119 		order = flsl(npages) - 1;
1134  * "npages" must be greater than zero.  Both "alignment" and "boundary" must
1138 vm_phys_scan_contig(u_long npages, vm_paddr_t low, vm_paddr_t high,
1146 	KASSERT(npages > 0, ("npages is 0"));
1165 		if (pa_end - VM_PAGE_TO_PHYS(m_start) < ptoa(npages))
1168 		m_run = vm_page_scan_contig(npages, m_start, m_end,
1302  * "npages" from the free lists.  All of the physical pages must be at
1311 vm_phys_alloc_contig(u_long npages, vm_paddr_t low, vm_paddr_t high,
1320 	KASSERT(npages > 0, ("npages is 0"));
1347 		if (pa_end - pa_start < ptoa(npages))
1349 		m_run = vm_phys_alloc_seg_contig(seg, npages, low, high,
1365 vm_phys_alloc_seg_contig(struct vm_phys_seg *seg, u_long npages,
1374 	KASSERT(npages > 0, ("npages is 0"));
1378 	/* Compute the queue that is the best fit for npages. */
1379 	for (order = 0; (1 << order) < npages; order++);
1381 	size = npages << PAGE_SHIFT;
1435 	for (m = m_ret; m < &m_ret[npages]; m = &m[1 << oind]) {
1444 	npages_end = roundup2(npages, 1 << imin(oind, order));
1445 	if (npages < npages_end)
1446 		vm_phys_free_contig(&m_ret[npages], npages_end - npages);