fd275a78bd
return through doreti to handle ast's. This is necessary for the clock interrupts to work properly. - Change the clock interrupts on the x86 to be fast instead of threaded. This is needed because both hardclock() and statclock() need to run in the context of the current process, not in a separate thread context. - Kill the prevproc hack as it is no longer needed. - We really need Giant when we call psignal(), but we don't want to block during the clock interrupt. Instead, use two p_flag's in the proc struct to mark the current process as having a pending SIGVTALRM or a SIGPROF and let them be delivered during ast() when hardclock() has finished running. - Remove CLKF_BASEPRI, which was #ifdef'd out on the x86 anyways. It was broken on the x86 if it was turned on since cpl is gone. It's only use was to bogusly run softclock() directly during hardclock() rather than scheduling an SWI. - Remove the COM_LOCK simplelock and replace it with a clock_lock spin mutex. Since the spin mutex already handles disabling/restoring interrupts appropriately, this also lets us axe all the *_intr() fu. - Back out the hacks in the APIC_IO x86 cpu_initclocks() code to use temporary fast interrupts for the APIC trial. - Add two new process flags P_ALRMPEND and P_PROFPEND to mark the pending signals in hardclock() that are to be delivered in ast(). Submitted by: jakeb (making statclock safe in a fast interrupt) Submitted by: cp (concept of delaying signals until ast())
179 lines
6.7 KiB
C
179 lines
6.7 KiB
C
/* $FreeBSD$ */
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/* From: NetBSD: cpu.h,v 1.18 1997/09/23 23:17:49 mjacob Exp */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: cpu.h 1.16 91/03/25$
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*
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* @(#)cpu.h 8.4 (Berkeley) 1/5/94
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*/
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#ifndef _ALPHA_CPU_H_
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#define _ALPHA_CPU_H_
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/*
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* Exported definitions unique to Alpha cpu support.
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*/
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#include <machine/frame.h>
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/*
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* Arguments to hardclock and gatherstats encapsulate the previous
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* machine state in an opaque clockframe. One the Alpha, we use
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* what we push on an interrupt (a trapframe).
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*/
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struct clockframe {
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struct trapframe cf_tf;
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};
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#define CLKF_USERMODE(framep) \
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(((framep)->cf_tf.tf_regs[FRAME_PS] & ALPHA_PSL_USERMODE) != 0)
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#define CLKF_PC(framep) ((framep)->cf_tf.tf_regs[FRAME_PC])
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#define CLKF_INTR(framep) (PCPU_GET(intr_nesting_level) >= 2)
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/*
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* Preempt the current process if in interrupt from user mode,
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* or after the current trap/syscall if in system mode.
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*/
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#define need_resched() do { want_resched = 1; aston(); } while (0)
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#define resched_wanted() want_resched
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/*
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* Give a profiling tick to the current process when the user profiling
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* buffer pages are invalid. On the hp300, request an ast to send us
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* through trap, marking the proc as needing a profiling tick.
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*/
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#define need_proftick(p) \
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do { (p)->p_flag |= P_OWEUPC; aston(); } while (0)
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/*
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* Notify the current process (p) that it has a signal pending,
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* process as soon as possible.
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*/
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#define signotify(p) aston()
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#define aston() PCPU_SET(astpending, 1)
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#ifdef _KERNEL
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extern u_int astpending;
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extern u_int32_t intr_nesting_level; /* bookeeping only; counts sw intrs */
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extern u_int32_t want_resched; /* resched() was called */
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#endif
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/*
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* CTL_MACHDEP definitions.
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*/
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#define CPU_CONSDEV 1 /* dev_t: console terminal device */
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#define CPU_ROOT_DEVICE 2 /* string: root device name */
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#define CPU_UNALIGNED_PRINT 3 /* int: print unaligned accesses */
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#define CPU_UNALIGNED_FIX 4 /* int: fix unaligned accesses */
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#define CPU_UNALIGNED_SIGBUS 5 /* int: SIGBUS unaligned accesses */
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#define CPU_BOOTED_KERNEL 6 /* string: booted kernel name */
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#define CPU_ADJKERNTZ 7 /* int: timezone offset (seconds) */
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#define CPU_DISRTCSET 8 /* int: disable resettodr() call */
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#define CPU_WALLCLOCK 9 /* int: indicates wall CMOS clock */
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#define CPU_MAXID 9 /* 9 valid machdep IDs */
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#define CTL_MACHDEP_NAMES { \
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{ 0, 0 }, \
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{ "console_device", CTLTYPE_STRUCT }, \
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{ "root_device", CTLTYPE_STRING }, \
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{ "unaligned_print", CTLTYPE_INT }, \
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{ "unaligned_fix", CTLTYPE_INT }, \
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{ "unaligned_sigbus", CTLTYPE_INT }, \
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{ "booted_kernel", CTLTYPE_STRING }, \
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{ "adjkerntz", CTLTYPE_INT }, \
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{ "disable_rtc_set", CTLTYPE_INT }, \
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{ "wall_cmos_clock", CTLTYPE_INT }, \
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}
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#ifdef _KERNEL
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struct pcb;
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struct proc;
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struct reg;
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struct rpb;
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struct trapframe;
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extern struct rpb *hwrpb;
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extern volatile int mc_expected, mc_received;
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void XentArith __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentIF __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentInt __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentMM __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentRestart __P((void)); /* MAGIC */
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void XentSys __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void XentUna __P((u_int64_t, u_int64_t, u_int64_t)); /* MAGIC */
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void alpha_init __P((u_long, u_long, u_long, u_long, u_long));
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int alpha_pa_access __P((u_long));
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void alpha_fpstate_check __P((struct proc *p));
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void alpha_fpstate_save __P((struct proc *p, int write));
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void alpha_fpstate_drop __P((struct proc *p));
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void alpha_fpstate_switch __P((struct proc *p));
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void ast __P((struct trapframe *));
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int badaddr __P((void *, size_t));
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int badaddr_read __P((void *, size_t, void *));
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void child_return __P((struct proc *p));
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u_int64_t console_restart __P((u_int64_t, u_int64_t, u_int64_t));
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void dumpconf __P((void));
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void exception_return __P((void)); /* MAGIC */
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void frametoreg __P((struct trapframe *, struct reg *));
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long fswintrberr __P((void)); /* MAGIC */
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void init_prom_interface __P((struct rpb*));
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void interrupt
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__P((unsigned long, unsigned long, unsigned long, struct trapframe *));
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void machine_check
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__P((unsigned long, struct trapframe *, unsigned long, unsigned long));
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u_int64_t hwrpb_checksum __P((void));
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void hwrpb_restart_setup __P((void));
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void regdump __P((struct trapframe *));
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void regtoframe __P((struct reg *, struct trapframe *));
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void savectx __P((struct pcb *));
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void set_iointr __P((void (*)(void *, unsigned long)));
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void switch_exit __P((struct proc *)); /* MAGIC */
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void switch_trampoline __P((void)); /* MAGIC */
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void syscall __P((u_int64_t, struct trapframe *));
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void trap __P((unsigned long, unsigned long, unsigned long, unsigned long,
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struct trapframe *));
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#endif /* _KERNEL */
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#endif /* _ALPHA_CPU_H_ */
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