C++ (Cpp) PMAP_PREFER Examples

Example #1

File: uvm_bio.c Project: dzavalishin/oskit

void
ubc_init(void)
{
	struct ubc_map *umap;
	vaddr_t va;
	int i;

	/*
	 * init ubc_object.
	 * alloc and init ubc_map's.
	 * init inactive queues.
	 * alloc and init hashtable.
	 * map in ubc_object.
	 */

	simple_lock_init(&ubc_object.uobj.vmobjlock);
	ubc_object.uobj.pgops = &ubc_pager;
	TAILQ_INIT(&ubc_object.uobj.memq);
	ubc_object.uobj.uo_npages = 0;
	ubc_object.uobj.uo_refs = UVM_OBJ_KERN;

	ubc_object.umap = malloc(ubc_nwins * sizeof(struct ubc_map),
				 M_TEMP, M_NOWAIT);
	bzero(ubc_object.umap, ubc_nwins * sizeof(struct ubc_map));

	va = (vaddr_t)1L;
#ifdef PMAP_PREFER
	PMAP_PREFER(0, &va);
	if (va < UBC_WINSIZE) {
		va = UBC_WINSIZE;
	}
	ubc_nqueues = va / UBC_WINSIZE;
	if (ubc_nqueues != 1) {
		ubc_release_unmap = TRUE;
	}
#endif
	ubc_object.inactive = malloc(UBC_NQUEUES *
				     sizeof(struct ubc_inactive_head),
				     M_TEMP, M_NOWAIT);
	for (i = 0; i < UBC_NQUEUES; i++) {
		TAILQ_INIT(&ubc_object.inactive[i]);
	}
	for (i = 0; i < ubc_nwins; i++) {
		umap = &ubc_object.umap[i];
		TAILQ_INSERT_TAIL(&ubc_object.inactive[i & (UBC_NQUEUES - 1)],
				  umap, inactive);
	}

	ubc_object.hash = hashinit(ubc_nwins, HASH_LIST, M_TEMP, M_NOWAIT,
				   &ubc_object.hashmask);
	for (i = 0; i <= ubc_object.hashmask; i++) {
		LIST_INIT(&ubc_object.hash[i]);
	}

	if (uvm_map(kernel_map, (vaddr_t *)&ubc_object.kva,
		    ubc_nwins * UBC_WINSIZE, &ubc_object.uobj, 0, (vsize_t)va,
		    UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_NONE,
				UVM_ADV_RANDOM, UVM_FLAG_NOMERGE))
	    != KERN_SUCCESS) {
		panic("ubc_init: failed to map ubc_object\n");
	}
	UVMHIST_INIT(ubchist, 300);
}

Example #2

File: uvm_bio.c Project: MarginC/kame

void
ubc_init(void)
{
	struct ubc_map *umap;
	vaddr_t va;
	int i;

	/*
	 * Make sure ubc_winshift is sane.
	 */
	if (ubc_winshift < PAGE_SHIFT)
		ubc_winshift = PAGE_SHIFT;

	/*
	 * init ubc_object.
	 * alloc and init ubc_map's.
	 * init inactive queues.
	 * alloc and init hashtable.
	 * map in ubc_object.
	 */

	simple_lock_init(&ubc_object.uobj.vmobjlock);
	ubc_object.uobj.pgops = &ubc_pager;
	TAILQ_INIT(&ubc_object.uobj.memq);
	ubc_object.uobj.uo_npages = 0;
	ubc_object.uobj.uo_refs = UVM_OBJ_KERN;

	ubc_object.umap = malloc(ubc_nwins * sizeof(struct ubc_map),
				 M_TEMP, M_NOWAIT);
	if (ubc_object.umap == NULL)
		panic("ubc_init: failed to allocate ubc_map");
	memset(ubc_object.umap, 0, ubc_nwins * sizeof(struct ubc_map));

	if (ubc_winshift < PAGE_SHIFT) {
		ubc_winshift = PAGE_SHIFT;
	}
	va = (vaddr_t)1L;
#ifdef PMAP_PREFER
	PMAP_PREFER(0, &va);
	ubc_nqueues = va >> ubc_winshift;
	if (ubc_nqueues == 0) {
		ubc_nqueues = 1;
	}
	if (ubc_nqueues != 1) {
		ubc_release_unmap = TRUE;
	}
#endif
	ubc_winsize = 1 << ubc_winshift;
	ubc_object.inactive = malloc(UBC_NQUEUES *
	    sizeof(struct ubc_inactive_head), M_TEMP, M_NOWAIT);
	if (ubc_object.inactive == NULL)
		panic("ubc_init: failed to allocate inactive queue heads");
	for (i = 0; i < UBC_NQUEUES; i++) {
		TAILQ_INIT(&ubc_object.inactive[i]);
	}
	for (i = 0; i < ubc_nwins; i++) {
		umap = &ubc_object.umap[i];
		TAILQ_INSERT_TAIL(&ubc_object.inactive[i & (UBC_NQUEUES - 1)],
				  umap, inactive);
	}

	ubc_object.hash = hashinit(ubc_nwins, HASH_LIST, M_TEMP, M_NOWAIT,
				   &ubc_object.hashmask);
	for (i = 0; i <= ubc_object.hashmask; i++) {
		LIST_INIT(&ubc_object.hash[i]);
	}

	if (uvm_map(kernel_map, (vaddr_t *)&ubc_object.kva,
		    ubc_nwins << ubc_winshift, &ubc_object.uobj, 0, (vsize_t)va,
		    UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_NONE,
				UVM_ADV_RANDOM, UVM_FLAG_NOMERGE)) != 0) {
		panic("ubc_init: failed to map ubc_object\n");
	}
	UVMHIST_INIT(ubchist, 300);
}