X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/765c9de3b4af7c2078d16a03812ae2c7c2b24938..7e41aa883dd258f888d0470250eead40a53ef1f5:/osfmk/ipc/ipc_table.c diff --git a/osfmk/ipc/ipc_table.c b/osfmk/ipc/ipc_table.c index e8de5a125..b65071b28 100644 --- a/osfmk/ipc/ipc_table.c +++ b/osfmk/ipc/ipc_table.c @@ -1,93 +1,33 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. - * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * @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. 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 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * 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 @@ -131,29 +71,13 @@ #include #include -/* - * 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; -unsigned int ipc_table_entries_size = 512; +unsigned int ipc_table_entries_size = CONFIG_IPC_TABLE_ENTRIES_STEPS; -ipc_table_size_t ipc_table_dnrequests; -unsigned int ipc_table_dnrequests_size = 64; +ipc_table_size_t ipc_table_requests; +unsigned int ipc_table_requests_size = 64; -void +static void ipc_table_fill( ipc_table_size_t its, /* array to fill */ unsigned int num, /* size of array */ @@ -168,28 +92,28 @@ ipc_table_fill( /* 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; } } @@ -211,17 +135,17 @@ ipc_table_init(void) 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; } /* @@ -232,53 +156,18 @@ ipc_table_init(void) * May block. */ -vm_offset_t +void * ipc_table_alloc( vm_size_t size) { - vm_offset_t table; - - if (size < PAGE_SIZE) - table = kalloc(size); - else - if (kmem_alloc(kalloc_map, &table, size) != KERN_SUCCESS) - table = 0; - - return table; + return kalloc(size); } -/* - * Routine: ipc_table_realloc - * Purpose: - * Reallocate a big table. - * - * The new table remaps the old table, - * so copying is not necessary. - * 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) -{ - 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; -} /* * 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. */ @@ -286,10 +175,7 @@ ipc_table_realloc( 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); }