Function pmap_enter_object

freebsd/arm/arm/pmap-v6.c:4805–4835

* Maps a sequence of resident pages belonging to the same object. * The sequence begins with the given page m_start. This page is * mapped at the given virtual address start. Each subsequent page is * mapped at a virtual address that is offset from start by the same * amount as the page is offset from m_start within the object. The * last page in the sequence is the page with the lar

 *  corresponding offset from m_start are mapped.
 */
void
pmap_enter_object(pmap_t pmap, vm_offset_t start, vm_offset_t end,
    vm_page_t m_start, vm_prot_t prot)
{
	vm_offset_t va;
	vm_page_t m, mpt2pg;
	vm_pindex_t diff, psize;

	PDEBUG(6, printf("%s: pmap %p start %#x end  %#x m %p prot %#x\n",
	    __func__, pmap, start, end, m_start, prot));

	VM_OBJECT_ASSERT_LOCKED(m_start->object);
	psize = atop(end - start);
	mpt2pg = NULL;
	m = m_start;
	rw_wlock(&pvh_global_lock);
	PMAP_LOCK(pmap);
	while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) {
		va = start + ptoa(diff);
		if ((va & PTE1_OFFSET) == 0 && va + PTE1_SIZE <= end &&
		    m->psind == 1 && sp_enabled &&
		    pmap_enter_1mpage(pmap, va, m, prot))
			m = &m[PTE1_SIZE / PAGE_SIZE - 1];
		else
			mpt2pg = pmap_enter_quick_locked(pmap, va, m, prot,
			    mpt2pg);
		m = TAILQ_NEXT(m, listq);
	}
	rw_wunlock(&pvh_global_lock);
	PMAP_UNLOCK(pmap);
}

/*
 *  This code maps large physical mmap regions into the