2 * Copyright (c) 1996, 1998 University of Utah and the Flux Group.
5 * This file is part of the Flux OSKit. The OSKit is free software, also known
6 * as "open source;" you can redistribute it and/or modify it under the terms
7 * of the GNU General Public License (GPL), version 2, as published by the Free
8 * Software Foundation (FSF). To explore alternate licensing terms, contact
9 * the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
11 * The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
12 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 * FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
14 * received a copy of the GPL along with the OSKit; see the file COPYING. If
15 * not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
19 * Simple address map deallocation routine, similar to what POSIX munmap or
20 * Mach vm_deallocate would require.
26 * amm_deallocate frees a range of address space.
27 * Only AMM_ALLOCATED areas are freed, AMM_RESERVED/FREE regions are skipped.
29 * Addr and size define the range.
31 * Returns zero on success, error number on failure.
34 amm_deallocate(struct amm *amm, vm_offset_t addr, vm_size_t size)
36 vm_offset_t saddr, eaddr;
42 while (saddr < eaddr) {
44 * Find the next allocated entry and free the portion
45 * covered by our range.
47 entry = amm_find_addr(amm, saddr);
48 if ((amm_entry_flags(entry) & AMM_ALLOCATED) == AMM_ALLOCATED) {
49 if (eaddr < amm_entry_end(entry))
52 size = amm_entry_end(entry) - saddr;
53 rc = amm_modify(amm, saddr, size, AMM_FREE, 0);
57 saddr = amm_entry_end(entry);