OpenSolaris_b135/uts/common/os/space.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* The intent of this file is to contain any data that must remain
* resident in the kernel.
*
* space_store(), space_fetch(), and space_free() have been added to
* easily store and retrieve kernel resident data.
* These functions are recommended rather than adding new variables to
* this file.
*
* Note that it's possible for name collisions to occur. In order to
* prevent collisions, it's recommended that the convention in
* PSARC/1997/389 be used. If a collision occurs, then space_store will
* fail.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/var.h>
#include <sys/proc.h>
#include <sys/signal.h>
#include <sys/utsname.h>
#include <sys/buf.h>
#include <sys/cred.h>
#include <sys/vfs.h>
#include <sys/vnode.h>
#include <sys/sysinfo.h>
#include <sys/t_lock.h>
#include <sys/vmem.h>
#include <sys/modhash.h>
#include <sys/cmn_err.h>
#include <sys/strredir.h>
#include <sys/kbio.h>
#include <sys/consdev.h>
#include <sys/wscons.h>
#include <sys/bootprops.h>
struct buf bfreelist; /* Head of the free list of buffers */
sysinfo_t sysinfo;
vminfo_t vminfo; /* VM stats protected by sysinfolock mutex */
#ifdef lint
int __lintzero; /* Alway zero for shutting up lint */
#endif
/*
* The following describe the physical memory configuration.
*
* physmem - The amount of physical memory configured
* in pages. ptob(physmem) is the amount
* of physical memory in bytes. Defined in
* .../os/startup.c.
*
* physmax - The highest numbered physical page in memory.
*
* maxmem - Maximum available memory, in pages. Defined
* in main.c.
*
* physinstalled
* - Pages of physical memory installed;
* includes use by PROM/boot not counted in
* physmem.
*/
pfn_t physmax;
pgcnt_t physinstalled;
struct var v;
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/kmem.h>
#include <sys/sysmacros.h>
#include <sys/bootconf.h>
/*
* Data for segkmem pages that should be resident
*/
struct vnode kvps[KV_MAX];
/*
* Data from swapgeneric.c that must be resident.
*/
struct vnode *rootvp; /* vnode of the root device */
dev_t rootdev; /* dev_t of the root device */
boolean_t root_is_svm; /* root is a mirrored device flag */
boolean_t root_is_ramdisk; /* root is ramdisk */
uint32_t ramdisk_size; /* (KB) currently set only for sparc netboots */
/*
* dhcp
*/
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/sockio.h>
#include <sys/stream.h>
#include <sys/stropts.h>
#include <sys/dlpi.h>
#include <net/if.h>
int netboot;
int obpdebug;
char *dhcack; /* dhcp response packet */
int dhcacklen;
char *netdev_path; /* Used to cache the netdev_path handed up by boot */
char dhcifname[IFNAMSIZ];
/*
* Data from arp.c that must be resident.
*/
#include <net/if_arp.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
ether_addr_t etherbroadcastaddr = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
/*
* Data from timod that must be resident
*/
/*
* state transition table for TI interface
*/
#include <sys/tihdr.h>
#define nr 127 /* not reachable */
char ti_statetbl[TE_NOEVENTS][TS_NOSTATES] = {
/* STATES */
/* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 */
{ 1, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, 2, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, 4, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, 0, 3, nr, 3, 3, nr, nr, 7, nr, nr, nr, 6, 7, 9, 10, 11},
{nr, nr, 0, nr, nr, 6, nr, nr, nr, nr, nr, nr, 3, nr, 3, 3, 3},
{nr, nr, nr, nr, nr, nr, nr, nr, 9, nr, nr, nr, nr, 3, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, nr, 3, nr, nr, nr, nr, 3, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, nr, 7, nr, nr, nr, nr, 7, nr, nr, nr},
{nr, nr, nr, 5, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, 8, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, 12, 13, nr, 14, 15, 16, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, nr, nr, 9, nr, 11, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, nr, nr, 9, nr, 11, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, nr, nr, 10, nr, 3, nr, nr, nr, nr, nr},
{nr, nr, nr, 7, nr, nr, nr, 7, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, 9, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, nr, nr, 9, 10, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, nr, nr, 9, 10, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, nr, nr, 11, 3, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, 3, nr, nr, 3, 3, 3, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, nr, nr, nr, nr, 7, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, 9, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
{nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
};
#include <sys/tty.h>
#include <sys/ptyvar.h>
static void store_fetch_initspace();
/*
* Allocate tunable structures at runtime.
*/
void
space_init(void)
{
pty_initspace();
store_fetch_initspace();
}
int ts_dispatch_extended = -1; /* set in ts_getdptbl or set_platform_default */
/*
* Previously defined in consmsconf.c ...
*/
dev_t kbddev = NODEV;
dev_t mousedev = NODEV;
dev_t stdindev = NODEV;
struct vnode *wsconsvp;
dev_t fbdev = NODEV;
struct vnode *fbvp;
dev_info_t *fbdip;
/*
* moved from cons.c because they must be resident in the kernel.
*/
vnode_t *rconsvp;
dev_t rconsdev;
dev_t uconsdev = NODEV;
/*
* serial virtual console vnode pointer.
*/
vnode_t *vsconsvp = NULL;
/*
* Flag whether console fb output is using PROM/PROM emulation
* terminal emulator, or is using the kernel terminal emulator.
*/
int consmode = CONS_FW;
/*
* The following allows systems to disable use of the kernel
* terminal emulator (retreat to PROM terminal emulator if there
* is PROM).
*/
int cons_tem_disable;
/*
* consconfig() in autoconf.c sets this; it's the vnode of the distinguished
* keyboard/frame buffer combination, aka the workstation console.
*/
vnode_t *rwsconsvp;
dev_t rwsconsdev;
/*
* Platform console abort policy.
* Platforms may override the default software policy, if such hardware
* (e.g. keyswitches with a secure position) exists.
*/
int abort_enable = KIOCABORTENABLE;
/* from cpc.c */
uint_t kcpc_key; /* TSD key for CPU performance counter context */
/*
* storing and retrieving data by string key
*
* this mechanism allows a consumer to store and retrieve by name a pointer
* to some space maintained by the consumer.
* For example, a driver or module may want to have persistent data
* over unloading/loading cycles. The pointer is typically to some
* kmem_alloced space and it should not be pointing to data that will
* be destroyed when the module is unloaded.
*/
static mod_hash_t *space_hash;
static char *space_hash_name = "space_hash";
static size_t space_hash_nchains = 8;
static void
store_fetch_initspace()
{
space_hash = mod_hash_create_strhash(space_hash_name,
space_hash_nchains, mod_hash_null_valdtor);
ASSERT(space_hash);
}
int
space_store(char *key, uintptr_t ptr)
{
char *s;
int rval;
size_t l;
/* some sanity checks first */
if (key == NULL) {
return (-1);
}
l = (size_t)strlen(key);
if (l == 0) {
return (-1);
}
/* increment for null terminator */
l++;
/* alloc space for the string, mod_hash_insert will deallocate */
s = kmem_alloc(l, KM_SLEEP);
bcopy(key, s, l);
rval = mod_hash_insert(space_hash,
(mod_hash_key_t)s, (mod_hash_val_t)ptr);
switch (rval) {
case 0:
break;
#ifdef DEBUG
case MH_ERR_DUPLICATE:
cmn_err(CE_WARN, "space_store: duplicate key %s", key);
rval = -1;
break;
case MH_ERR_NOMEM:
cmn_err(CE_WARN, "space_store: no mem for key %s", key);
rval = -1;
break;
default:
cmn_err(CE_WARN, "space_store: unspecified error for key %s",
key);
rval = -1;
break;
#else
default:
rval = -1;
break;
#endif
}
return (rval);
}
uintptr_t
space_fetch(char *key)
{
uintptr_t ptr = 0;
mod_hash_val_t val;
int rval;
if (key) {
rval = mod_hash_find(space_hash, (mod_hash_key_t)key, &val);
if (rval == 0) {
ptr = (uintptr_t)val;
}
}
return (ptr);
}
void
space_free(char *key)
{
if (key) {
(void) mod_hash_destroy(space_hash, (mod_hash_key_t)key);
}
}
/*
* Support for CRC32. At present all calculations are done in simple
* macros, so all we need is somewhere to declare the global lookup table.
*/
#include <sys/crc32.h>
const uint32_t crc32_table[256] = { CRC32_TABLE };
/*
* We need to fanout load from NIC which can overwhelm a single CPU.
* This becomes especially important on systems having slow CPUs
* (sun4v architecture). mac_soft_ring_enable is false on all
* systems except sun4v. On sun4v, they get enabled by default (see
* sun4v/os/mach_startup.c).
*/
boolean_t mac_soft_ring_enable = B_FALSE;
/*
* Global iscsi boot prop
*/
ib_boot_prop_t *iscsiboot_prop = NULL;