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Implemented a version of rmlock using rwlock.

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This commit is contained in:
Jennifer Averett 2012-04-16 09:10:35 -05:00
parent 362782eb25
commit 459afb1c76
8 changed files with 1183 additions and 93 deletions
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2
Makefile
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@ -324,6 +324,7 @@ C_FILES = \
freebsd/netinet/tcp_hostcache.c \
freebsd/dev/pci/pci.c \
freebsd/kern/uipc_accf.c \
freebsd/kern/kern_ntptime.c \
freebsd/dev/re/if_re.c \
freebsd/dev/fxp/if_fxp.c \
freebsd/dev/e1000/e1000_80003es2lan.c \
@ -392,6 +393,7 @@ C_FILES += \
rtemsbsd/src/rtems-bsd-uma.c \
rtemsbsd/src/rtems-bsd-taskqueue.c \
rtemsbsd/src/rtems-bsd-timesupport.c \
rtemsbsd/src/rtems-bsd-timeout.c \
rtemsbsd/src/rtems-bsd-newproc.c \
rtemsbsd/src/rtems-bsd-vm_glue.c

2
freebsd-to-rtems.py
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@ -533,6 +533,7 @@ rtems_sourceFiles = [
'src/rtems-bsd-uma.c',
'src/rtems-bsd-taskqueue.c',
'src/rtems-bsd-timesupport.c',
'src/rtems-bsd-timeout.c',
'src/rtems-bsd-newproc.c',
'src/rtems-bsd-vm_glue.c',
]
@ -1140,6 +1141,7 @@ devNic.addSourceFiles(
'netinet/tcp_hostcache.c',
'dev/pci/pci.c',
'kern/uipc_accf.c',
'kern/kern_ntptime.c',
]
)

1045
freebsd/kern/kern_ntptime.c Normal file
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File diff suppressed because it is too large Load Diff

5
freebsd/sys/_rmlock.h
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@ -43,6 +43,7 @@
LIST_HEAD(rmpriolist,rm_priotracker);
#ifndef __rtems__
struct rmlock {
struct lock_object lock_object;
volatile int rm_noreadtoken;
@ -50,6 +51,10 @@ struct rmlock {
struct mtx rm_lock;
};
#else /* __rtems__ */
#include <freebsd/sys/rwlock.h>
#define rmlock rwlock
#endif /* __rtems__ */
struct rm_priotracker {
struct rm_queue rmp_cpuQueue; /* Must be first */

17
freebsd/sys/rmlock.h
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@ -44,6 +44,7 @@
#define RM_NOWITNESS 0x00000001
#define RM_RECURSE 0x00000002
#ifndef __rtems__
void rm_init(struct rmlock *rm, const char *name);
void rm_init_flags(struct rmlock *rm, const char *name, int opts);
void rm_destroy(struct rmlock *rm);
@ -84,6 +85,22 @@ void _rm_runlock(struct rmlock *rm, struct rm_priotracker *tracker);
#define rm_runlock(rm,tracker) _rm_runlock((rm), (tracker))
#endif
#else /* __rtems__ */
#define rm_init(rm, name) rw_init(rm, name)
#define rm_init_flags(rm, name, opts) rw_init_flags(rm, name, opts)
#define rm_destroy(rm) rw_destroy(rm)
#define rm_wowned(rm) rw_wowned(rm)
#define rm_sysinit(arg) rw_sysinit(arg)
#define rm_sysinit_flags(arg) rw_sysinit_flags(arg)
#define rm_wlock(rm) rw_wlock((rm))
#define rm_wunlock(rm) rw_wunlock((rm))
#define rm_rlock(rm,tracker) rw_rlock((rm))
#define rm_runlock(rm,tracker) rw_runlock((rm))
#endif /* __rtems__ */
struct rm_args {
struct rmlock *ra_rm;
const char *ra_desc;

2
rtemsbsd/src/rtems-bsd-lock.c
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@ -39,7 +39,7 @@ struct lock_class *lock_classes[LOCK_CLASS_MAX + 1] = {
&lock_class_mtx_spin,
&lock_class_mtx_sleep,
&lock_class_sx,
&lock_class_rm,
&lock_class_rw,
&lock_class_rw,
};

92
rtemsbsd/src/rtems-bsd-rmlock.c
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@ -1,92 +0,0 @@
/**
* @file
*
* @ingroup rtems_bsd_rtems
*
* @brief TODO.
*/
/*
* COPYRIGHT (c) 2012.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <freebsd/machine/rtems-bsd-config.h>
#include <sys/types.h>
#include <freebsd/sys/param.h>
#include <freebsd/sys/types.h>
#include <freebsd/sys/systm.h>
#include <freebsd/sys/lock.h>
#include <freebsd/sys/rmlock.h>
#include <pthread.h>
#define RMPF_ONQUEUE 1
#define RMPF_SIGNAL 2
/*
* To support usage of rmlock in CVs and msleep yet another list for the
* priority tracker would be needed. Using this lock for cv and msleep also
* does not seem very useful
*/
static __inline void compiler_memory_barrier(void) {
__asm __volatile("":::"memory");
}
static void assert_rm(struct lock_object *lock, int what);
static void lock_rm(struct lock_object *lock, int how);
#ifdef KDTRACE_HOOKS
static int owner_rm(struct lock_object *lock, struct thread **owner);
#endif
static int unlock_rm(struct lock_object *lock);
struct lock_class lock_class_rm = {
.lc_name = "rm",
.lc_flags = LC_SLEEPLOCK | LC_RECURSABLE,
.lc_assert = assert_rm,
#if 0
#ifdef DDB
.lc_ddb_show = db_show_rwlock,
#endif
#endif
.lc_lock = lock_rm,
.lc_unlock = unlock_rm,
#ifdef KDTRACE_HOOKS
.lc_owner = owner_rm,
#endif
};
static void
assert_rm(struct lock_object *lock, int what)
{
panic("assert_rm called");
}
static void
lock_rm(struct lock_object *lock, int how)
{
panic("lock_rm called");
}
static int
unlock_rm(struct lock_object *lock)
{
panic("unlock_rm called");
}
#ifdef KDTRACE_HOOKS
static int
owner_rm(struct lock_object *lock, struct thread **owner)
{
panic("owner_rm called");
}
#endif

111
rtemsbsd/src/rtems-bsd-timeout.c Normal file
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@ -0,0 +1,111 @@
/**
* @file
*
* @ingroup rtems_bsd_rtems
*
* @brief TODO.
*/
/*
* COPYRIGHT (c) 1989-2012.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <freebsd/machine/rtems-bsd-config.h>
#include <freebsd/sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <freebsd/sys/param.h>
#include <freebsd/sys/systm.h>
#include <freebsd/sys/bus.h>
#include <freebsd/sys/callout.h>
#include <freebsd/sys/condvar.h>
#include <freebsd/sys/interrupt.h>
#include <freebsd/sys/kernel.h>
#include <freebsd/sys/ktr.h>
#include <freebsd/sys/lock.h>
#include <freebsd/sys/malloc.h>
#include <freebsd/sys/mutex.h>
#include <freebsd/sys/proc.h>
#include <freebsd/sys/sdt.h>
static int timeout_cpu;
/*
* There is one struct callout_cpu per cpu, holding all relevant
* state for the callout processing thread on the individual CPU.
* In particular:
* cc_ticks is incremented once per tick in callout_cpu().
* It tracks the global 'ticks' but in a way that the individual
* threads should not worry about races in the order in which
* hardclock() and hardclock_cpu() run on the various CPUs.
* cc_softclock is advanced in callout_cpu() to point to the
* first entry in cc_callwheel that may need handling. In turn,
* a softclock() is scheduled so it can serve the various entries i
* such that cc_softclock <= i <= cc_ticks .
* XXX maybe cc_softclock and cc_ticks should be volatile ?
*
* cc_ticks is also used in callout_reset_cpu() to determine
* when the callout should be served.
*/
struct callout_cpu {
struct mtx cc_lock;
struct callout *cc_callout;
struct callout_tailq *cc_callwheel;
struct callout_list cc_callfree;
struct callout *cc_next;
struct callout *cc_curr;
void *cc_cookie;
int cc_ticks;
int cc_softticks;
int cc_cancel;
int cc_waiting;
};
/*
* timeout --
* Execute a function after a specified length of time.
*
* untimeout --
* Cancel previous timeout function call.
*
* callout_handle_init --
* Initialize a handle so that using it with untimeout is benign.
*
* See AT&T BCI Driver Reference Manual for specification. This
* implementation differs from that one in that although an
* identification value is returned from timeout, the original
* arguments to timeout as well as the identifier are used to
* identify entries for untimeout.
*/
struct callout_handle
timeout(ftn, arg, to_ticks)
timeout_t *ftn;
void *arg;
int to_ticks;
{
struct callout_cpu *cc;
struct callout *new;
struct callout_handle handle;
#if 0
cc = CC_CPU(timeout_cpu);
CC_LOCK(cc);
/* Fill in the next free callout structure. */
new = SLIST_FIRST(&cc->cc_callfree);
if (new == NULL)
/* XXX Attempt to malloc first */
panic("timeout table full");
SLIST_REMOVE_HEAD(&cc->cc_callfree, c_links.sle);
callout_reset(new, to_ticks, ftn, arg);
handle.callout = new;
CC_UNLOCK(cc);
#endif
return (handle);
}