/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
-/*
- * HISTORY
- *
- * Revision 1.1.1.1 1998/09/22 21:05:28 wsanchez
- * Import of Mac OS X kernel (~semeria)
- *
- * Revision 1.2 1998/06/01 17:29:25 youngwor
- * Added infrastructure for shared port space support
- *
- * Revision 1.1.1.1 1998/03/07 02:26:16 wsanchez
- * Import of OSF Mach kernel (~mburg)
- *
- * Revision 1.2.10.1 1994/09/23 02:12:16 ezf
- * change marker to not FREE
- * [1994/09/22 21:30:49 ezf]
- *
- * Revision 1.2.2.3 1993/07/22 16:17:30 rod
- * Add ANSI prototypes. CR #9523.
- * [1993/07/22 13:33:29 rod]
- *
- * Revision 1.2.2.2 1993/06/02 23:33:55 jeffc
- * Added to OSF/1 R1.3 from NMK15.0.
- * [1993/06/02 21:11:14 jeffc]
- *
- * Revision 1.2 1992/11/25 01:09:56 robert
- * integrate changes below for norma_14
- *
- * Philippe Bernadat (bernadat) at gr.osf.org
- * Limit ipc table allocation chunks to 8 pages, otherwise
- * the kernel might dead lock because of VM_PAGE_FREE_RESERVED
- * limited to 15. [dlb@osf.org & barbou@gr.osf.org]
- * [1992/11/13 19:31:46 robert]
- *
- * Revision 1.1 1992/09/30 02:08:13 robert
- * Initial revision
- *
- * $EndLog$
- */
-/* CMU_HIST */
-/*
- * Revision 2.6 91/10/09 16:11:08 af
- * Revision 2.5.2.1 91/09/16 10:16:06 rpd
- * Removed unused variables.
- * [91/09/02 rpd]
- *
- * Revision 2.5.2.1 91/09/16 10:16:06 rpd
- * Removed unused variables.
- * [91/09/02 rpd]
- *
- * Revision 2.5 91/05/14 16:37:35 mrt
- * Correcting copyright
- *
- * Revision 2.4 91/03/16 14:48:52 rpd
- * Added ipc_table_realloc and ipc_table_reallocable.
- * [91/03/04 rpd]
- *
- * Revision 2.3 91/02/05 17:24:15 mrt
- * Changed to new Mach copyright
- * [91/02/01 15:52:05 mrt]
- *
- * Revision 2.2 90/06/02 14:51:58 rpd
- * Created for new IPC.
- * [90/03/26 21:04:20 rpd]
- *
- */
-/* CMU_ENDHIST */
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
#include <kern/kalloc.h>
#include <vm/vm_kern.h>
-/*
- * Forward declarations
- */
-void ipc_table_fill(
- ipc_table_size_t its,
- unsigned int num,
- unsigned int min,
- vm_size_t elemsize);
-
-/*
- * We borrow the kalloc map, rather than creating
- * yet another submap of the kernel map.
- */
-
-extern vm_map_t kalloc_map;
+ipc_table_size_t ipc_table_entries = NULL;
+unsigned int ipc_table_entries_size = CONFIG_IPC_TABLE_ENTRIES_STEPS;
-ipc_table_size_t ipc_table_entries;
-unsigned int ipc_table_entries_size = 512;
+ipc_table_size_t ipc_table_requests;
+unsigned int ipc_table_requests_size = 64;
-ipc_table_size_t ipc_table_dnrequests;
-unsigned int ipc_table_dnrequests_size = 64;
-
-void
+static void
ipc_table_fill(
ipc_table_size_t its, /* array to fill */
unsigned int num, /* size of array */
/* first use powers of two, up to the page size */
for (index = 0, size = 1;
- (index < num) && (size < PAGE_SIZE);
+ (index < num) && (size < PAGE_MAX_SIZE);
size <<= 1) {
if (size >= minsize) {
- its[index].its_size = size / elemsize;
+ its[index].its_size = (ipc_table_elems_t)(size / elemsize);
index++;
}
}
/* then increments of a page, then two pages, etc. */
- for (incrsize = PAGE_SIZE; index < num;) {
+ for (incrsize = PAGE_MAX_SIZE; index < num;) {
unsigned int period;
for (period = 0;
(period < 15) && (index < num);
period++, size += incrsize) {
if (size >= minsize) {
- its[index].its_size = size / elemsize;
+ its[index].its_size = (ipc_table_elems_t)(size / elemsize);
index++;
}
}
- if (incrsize < (PAGE_SIZE << 3))
+ if (incrsize < (vm_size_t)(PAGE_MAX_SIZE << 3))
incrsize <<= 1;
}
}
ipc_table_entries[ipc_table_entries_size - 2].its_size;
- ipc_table_dnrequests = (ipc_table_size_t)
+ ipc_table_requests = (ipc_table_size_t)
kalloc(sizeof(struct ipc_table_size) *
- ipc_table_dnrequests_size);
- assert(ipc_table_dnrequests != ITS_NULL);
+ ipc_table_requests_size);
+ assert(ipc_table_requests != ITS_NULL);
- ipc_table_fill(ipc_table_dnrequests, ipc_table_dnrequests_size - 1,
+ ipc_table_fill(ipc_table_requests, ipc_table_requests_size - 1,
2, sizeof(struct ipc_port_request));
/* the last element should have zero size */
- ipc_table_dnrequests[ipc_table_dnrequests_size - 1].its_size = 0;
+ ipc_table_requests[ipc_table_requests_size - 1].its_size = 0;
}
+
/*
- * Routine: ipc_table_alloc
+ * Routine: ipc_table_max_entries
* Purpose:
- * Allocate a table.
+ * returns the maximum number of entries an IPC space
+ * is allowed to contain (the maximum size to which it will grow)
* Conditions:
- * May block.
+ * none
*/
-
-vm_offset_t
-ipc_table_alloc(
- vm_size_t size)
+unsigned int
+ipc_table_max_entries(void)
{
- vm_offset_t table;
+ if (!ipc_table_entries || ipc_table_entries_size < 2)
+ return 0;
+ return (unsigned int)ipc_table_entries[ipc_table_entries_size - 1].its_size;
+}
- if (size < PAGE_SIZE)
- table = kalloc(size);
- else
- if (kmem_alloc(kalloc_map, &table, size) != KERN_SUCCESS)
- table = 0;
- return table;
+/*
+ * Routine: ipc_table_max_requests
+ * Purpose:
+ * returns the maximum number of requests an IPC request table
+ * is allowed to contain (the maximum size to which it will grow)
+ * Conditions:
+ * none
+ */
+unsigned int
+ipc_table_max_requests(void)
+{
+ if (!ipc_table_requests || ipc_table_requests_size < 2)
+ return 0;
+ return (unsigned int)ipc_table_requests[ipc_table_requests_size - 2].its_size;
}
+
/*
- * Routine: ipc_table_realloc
+ * Routine: ipc_table_alloc
* Purpose:
- * Reallocate a big table.
- *
- * The new table remaps the old table,
- * so copying is not necessary.
+ * Allocate a table.
* Conditions:
- * Only works for page-size or bigger tables.
* May block.
*/
-vm_offset_t
-ipc_table_realloc(
- vm_size_t old_size,
- vm_offset_t old_table,
- vm_size_t new_size)
+void *
+ipc_table_alloc(
+ vm_size_t size)
{
- vm_offset_t new_table;
-
- if (kmem_realloc(kalloc_map, old_table, old_size,
- &new_table, new_size) != KERN_SUCCESS)
- new_table = 0;
-
- return new_table;
+ return kalloc(size);
}
+
/*
* Routine: ipc_table_free
* Purpose:
- * Free a table allocated with ipc_table_alloc or
- * ipc_table_realloc.
+ * Free a table allocated with ipc_table_alloc.
* Conditions:
* May block.
*/
void
ipc_table_free(
vm_size_t size,
- vm_offset_t table)
+ void * table)
{
- if (size < PAGE_SIZE)
- kfree(table, size);
- else
- kmem_free(kalloc_map, table, size);
+ kfree(table, size);
}
projects / apple / xnu.git / blobdiff