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/*
Copyright (C) 1996 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "priv.h"
error_t
mom_unuse_memory (void *start, size_t len)
{
error_t err;
assert ((vm_address_t) start % vm_page_size == 0);
assert (len % vm_page_size == 0);
mutex_lock (&_mom_memory_lock);
/* Deallocate and reallocate so that we drop any mapping around. */
err = vm_deallocate (mach_task_self (), (vm_address_t) start, len);
if (!err)
err = vm_map (mach_task_self (), (vm_address_t *)&start, len, 0, 0,
MACH_PORT_NULL, 0, 0, 0,
VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE,
VM_INHERIT_COPY);
mutex_unlock (&_mom_memory_lock);
return err;
}
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