688ebe120c
the process of exiting the kernel. The ast() function now loops as long as the PS_ASTPENDING or PS_NEEDRESCHED flags are set. It returns with preemption disabled so that any further AST's that arrive via an interrupt will be delayed until the low-level MD code returns to user mode. - Use u_int's to store the tick counts for profiling purposes so that we do not need sched_lock just to read p_sticks. This also closes a problem where the call to addupc_task() could screw up the arithmetic due to non-atomic reads of p_sticks. - Axe need_proftick(), aston(), astoff(), astpending(), need_resched(), clear_resched(), and resched_wanted() in favor of direct bit operations on p_sflag. - Fix up locking with sched_lock some. In addupc_intr(), use sched_lock to ensure pr_addr and pr_ticks are updated atomically with setting PS_OWEUPC. In ast() we clear pr_ticks atomically with clearing PS_OWEUPC. We also do not grab the lock just to test a flag. - Simplify the handling of Giant in ast() slightly. Reviewed by: bde (mostly)
154 lines
5.6 KiB
C
154 lines
5.6 KiB
C
/* $FreeBSD$ */
|
|
/* 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_frame->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 TRAPF_USERMODE(framep) \
|
|
(((framep)->tf_cr_ipsr & IA64_PSR_CPL) == IA64_PSR_CPL_USER)
|
|
#define TRAPF_PC(framep) ((framep)->tf_cr_iip)
|
|
|
|
#define CLKF_USERMODE(framep) TRAPF_USERMODE(&(framep)->cf_tf)
|
|
#define CLKF_PC(framep) TRAPF_PC(&(framep)->cf_tf)
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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 fork_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_ */
|