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freebsd-skq/sys/ia64/include/cpu.h
bmilekic f364d4ac36 Change and clean the mutex lock interface. 
mtx_enter(lock, type) becomes:

mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks)
mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized)

similarily, for releasing a lock, we now have:

mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN.
We change the caller interface for the two different types of locks
because the semantics are entirely different for each case, and this
makes it explicitly clear and, at the same time, it rids us of the
extra `type' argument.

The enter->lock and exit->unlock change has been made with the idea
that we're "locking data" and not "entering locked code" in mind.

Further, remove all additional "flags" previously passed to the
lock acquire/release routines with the exception of two:

MTX_QUIET and MTX_NOSWITCH

The functionality of these flags is preserved and they can be passed
to the lock/unlock routines by calling the corresponding wrappers:

mtx_{lock, unlock}_flags(lock, flag(s)) and
mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN
locks, respectively.

Re-inline some lock acq/rel code; in the sleep lock case, we only
inline the _obtain_lock()s in order to ensure that the inlined code
fits into a cache line. In the spin lock case, we inline recursion and
actually only perform a function call if we need to spin. This change
has been made with the idea that we generally tend to avoid spin locks
and that also the spin locks that we do have and are heavily used
(i.e. sched_lock) do recurse, and therefore in an effort to reduce
function call overhead for some architectures (such as alpha), we
inline recursion for this case.

Create a new malloc type for the witness code and retire from using
the M_DEV type. The new type is called M_WITNESS and is only declared
if WITNESS is enabled.

Begin cleaning up some machdep/mutex.h code - specifically updated the
"optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN
and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently
need those.

Finally, caught up to the interface changes in all sys code.

Contributors: jake, jhb, jasone (in no particular order)
2001-02-09 06:11:45 +00:00

188 lines
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/* $FreeBSD$ */
/* From: NetBSD: cpu.h,v 1.18 1997/09/23 23:17:49 mjacob Exp */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Utah $Hdr: cpu.h 1.16 91/03/25$
*
* @(#)cpu.h 8.4 (Berkeley) 1/5/94
*/
#ifndef _MACHINE_CPU_H_
#define _MACHINE_CPU_H_
/*
* Exported definitions unique to Alpha cpu support.
*/
#include <machine/frame.h>
#define cpu_getstack(p) ((p)->p_md.md_tf->tf_r[FRAME_SP])
/*
* Arguments to hardclock and gatherstats encapsulate the previous
* machine state in an opaque clockframe. One the Alpha, we use
* what we push on an interrupt (a trapframe).
*/
struct clockframe {
struct trapframe cf_tf;
};
#define CLKF_USERMODE(framep) \
(((framep)->cf_tf.tf_cr_ipsr & IA64_PSR_CPL) == IA64_PSR_CPL_USER)
#define CLKF_BASEPRI(framep) \
(((framep)->cf_tf.tf_cr_ipsr & IA64_PSR_I) == 0)
#define CLKF_PC(framep) ((framep)->cf_tf.tf_cr_iip)
#define CLKF_INTR(framep) (curproc->p_intr_nesting_level >= 2)
/*
* Preempt the current process if in interrupt from user mode,
* or after the current trap/syscall if in system mode.
*/
#define need_resched() do { want_resched = 1; aston(); } while (0)
#define resched_wanted() want_resched
/*
* Give a profiling tick to the current process when the user profiling
* buffer pages are invalid. On the hp300, request an ast to send us
* through trap, marking the proc as needing a profiling tick.
*/
#define need_proftick(p) do { \
mtx_lock_spin(&sched_lock); \
(p)->p_sflag |= PS_OWEUPC; \
aston(); \
mtx_unlock_spin(&sched_lock); \
} while (0)
/*
* Notify the current process (p) that it has a signal pending,
* process as soon as possible.
*/
#define signotify(p) aston()
#define aston() PCPU_SET(astpending, 1)
#ifdef _KERNEL
extern u_int32_t want_resched; /* resched() was called */
#endif
/*
* CTL_MACHDEP definitions.
*/
#define CPU_CONSDEV 1 /* dev_t: console terminal device */
#define CPU_ROOT_DEVICE 2 /* string: root device name */
#define CPU_UNALIGNED_PRINT 3 /* int: print unaligned accesses */
#define CPU_UNALIGNED_FIX 4 /* int: fix unaligned accesses */
#define CPU_UNALIGNED_SIGBUS 5 /* int: SIGBUS unaligned accesses */
#define CPU_BOOTED_KERNEL 6 /* string: booted kernel name */
#define CPU_ADJKERNTZ 7 /* int: timezone offset (seconds) */
#define CPU_DISRTCSET 8 /* int: disable resettodr() call */
#define CPU_WALLCLOCK 9 /* int: indicates wall CMOS clock */
#define CPU_MAXID 9 /* 9 valid machdep IDs */
#define CTL_MACHDEP_NAMES { \
{ 0, 0 }, \
{ "console_device", CTLTYPE_STRUCT }, \
{ "root_device", CTLTYPE_STRING }, \
{ "unaligned_print", CTLTYPE_INT }, \
{ "unaligned_fix", CTLTYPE_INT }, \
{ "unaligned_sigbus", CTLTYPE_INT }, \
{ "booted_kernel", CTLTYPE_STRING }, \
{ "adjkerntz", CTLTYPE_INT }, \
{ "disable_rtc_set", CTLTYPE_INT }, \
{ "wall_cmos_clock", CTLTYPE_INT }, \
}
#ifdef _KERNEL
struct pcb;
struct proc;
struct reg;
struct rpb;
struct trapframe;
extern struct rpb *hwrpb;
extern volatile int mc_expected, mc_received;
void ast __P((struct trapframe *));
int badaddr __P((void *, size_t));
int badaddr_read __P((void *, size_t, void *));
void child_return __P((struct proc *p));
u_int64_t console_restart __P((u_int64_t, u_int64_t, u_int64_t));
void do_sir __P((void));
void dumpconf __P((void));
void exception_restore __P((void)); /* MAGIC */
void frametoreg __P((struct trapframe *, struct reg *));
long fswintrberr __P((void)); /* MAGIC */
int ia64_pa_access __P((u_long));
void ia64_init __P((void));
void ia64_fpstate_check __P((struct proc *p));
void ia64_fpstate_save __P((struct proc *p, int write));
void ia64_fpstate_drop __P((struct proc *p));
void ia64_fpstate_switch __P((struct proc *p));
void init_prom_interface __P((struct rpb*));
void interrupt __P((u_int64_t, struct trapframe *));
void machine_check
__P((unsigned long, struct trapframe *, unsigned long, unsigned long));
u_int64_t hwrpb_checksum __P((void));
void hwrpb_restart_setup __P((void));
void regdump __P((struct trapframe *));
void regtoframe __P((struct reg *, struct trapframe *));
int savectx __P((struct pcb *));
void restorectx __P((struct pcb *));
void set_iointr __P((void (*)(void *, unsigned long)));
void switch_exit __P((struct proc *)); /* MAGIC */
void switch_trampoline __P((void)); /* MAGIC */
void syscall __P((int, u_int64_t *, struct trapframe *));
void trap __P((int vector, int imm, struct trapframe *framep));
/*
* Return contents of in-cpu fast counter as a sort of "bogo-time"
* for non-critical timing.
*/
static __inline u_int64_t
get_cyclecount(void)
{
return (ia64_get_itc());
}
#endif /* _KERNEL */
#endif /* _MACHINE_CPU_H_ */
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