NetBSD/sys/arch/vax/include/cpu.h
ragge fe503fb96f Major update of the vax pmap:
- Reinstall the "dynamic page table length" that was removed some
	  years ago.
	- Limit the user page table submap to max 5% of available memory.
	- Free the page table space when a process is swapped out.
	- If the UPT submap runs out of space, throw away pmap mappings
	  using the same algorithm as for swapping processes.

As a result of this, 4MB machines are useable again and it's even possible
to compile a kernel for 2MB machines (but it will be slow... :-)

Still to do:
	- Multiprocessor fixes.
	- More profiling.
2002-03-10 22:32:31 +00:00

215 lines
6.8 KiB
C

/* $NetBSD: cpu.h,v 1.62 2002/03/10 22:32:31 ragge Exp $ */
/*
* Copyright (c) 1994 Ludd, University of Lule}, Sweden
* All rights reserved.
*
* 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 at Ludd, University of Lule}
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#ifndef _VAX_CPU_H_
#define _VAX_CPU_H_
#if defined(_KERNEL_OPT)
#include "opt_multiprocessor.h"
#include "opt_lockdebug.h"
#endif
#ifdef _KERNEL
#include <sys/cdefs.h>
#include <sys/device.h>
#include <sys/lock.h>
#include <sys/sched.h>
#include <machine/mtpr.h>
#include <machine/pcb.h>
#include <machine/uvax.h>
#include <machine/psl.h>
#define enablertclock()
#define cpu_wait(p)
/*
* All cpu-dependent info is kept in this struct. Pointer to the
* struct for the current cpu is set up in locore.c.
*/
struct cpu_info;
struct cpu_dep {
void (*cpu_steal_pages)(void); /* pmap init before mm is on */
int (*cpu_mchk)(caddr_t); /* Machine check handling */
void (*cpu_memerr)(void); /* Memory subsystem errors */
/* Autoconfiguration */
void (*cpu_conf)(void);
int (*cpu_clkread)(time_t); /* Read cpu clock time */
void (*cpu_clkwrite)(void); /* Write system time to cpu */
short cpu_vups; /* speed of cpu */
short cpu_scbsz; /* (estimated) size of system control block */
void (*cpu_halt)(void); /* Cpu dependent halt call */
void (*cpu_reboot)(int); /* Cpu dependent reboot call */
void (*cpu_clrf)(void); /* Clear cold/warm start flags */
void (*cpu_subconf)(struct device *);/*config cpu dep. devs */
int cpu_flags;
void (*cpu_badaddr)(void); /* cpu-specific badaddr() */
};
#if defined(MULTIPROCESSOR)
/*
* All cpu-dependent calls for multicpu systems goes here.
*/
struct cpu_mp_dep {
void (*cpu_startslave)(struct device *, struct cpu_info *);
void (*cpu_send_ipi)(struct device *dest);
void (*cpu_cnintr)(void);
};
/*
* NOTE: This is not bit mask, this is bit _number_.
*/
#define IPI_START_CNTX 1 /* Start console transmitter, proc out */
#define IPI_SEND_CNCHAR 2 /* Write char to console, kernel printf */
#define IPI_RUNNING 3 /* This CPU just started to run */
#define IPI_TBIA 4 /* Flush the TLB */
#define IPI_DDB 5 /* Jump into the DDB loop */
#define IPI_DEST_MASTER -1 /* Destination is mastercpu */
#define IPI_DEST_ALL -2 /* Broadcast */
extern struct cpu_mp_dep *mp_dep_call;
#endif /* defined(MULTIPROCESSOR) */
#define CPU_RAISEIPL 1 /* Must raise IPL until intr is handled */
extern struct cpu_dep *dep_call; /* Holds pointer to current CPU struct. */
struct clockframe {
int pc;
int ps;
};
struct cpu_info {
/*
* Public members.
*/
struct schedstate_percpu ci_schedstate; /* scheduler state */
#if defined(DIAGNOSTIC) || defined(LOCKDEBUG)
u_long ci_spin_locks; /* # of spin locks held */
u_long ci_simple_locks; /* # of simple locks held */
#endif
struct proc *ci_curproc; /* current owner of the processor */
/*
* Private members.
*/
int ci_want_resched; /* Should change process */
struct device *ci_dev; /* device struct for this cpu */
long ci_exit; /* Page to use while exiting */
#if defined(MULTIPROCESSOR)
struct pcb *ci_pcb; /* Idle PCB for this CPU */
vaddr_t ci_istack; /* Interrupt stack location */
int ci_flags; /* See below */
long ci_ipimsgs; /* Sent IPI bits */
struct trapframe *ci_ddb_regs; /* Used by DDB */
#endif
};
#define CI_MASTERCPU 1 /* Set if master CPU */
#define CI_RUNNING 2 /* Set when a slave CPU is running */
#define CI_STOPPED 4 /* Stopped (in debugger) */
#if defined(MULTIPROCESSOR)
/*
* "helper" struct. All multicpu systems must have the first two field
* of its cpu softc like this. (used in multicpu.c).
*/
struct cpu_mp_softc {
struct device sc_dev;
struct cpu_info sc_ci;
};
#endif /* defined(MULTIPROCESSOR) */
#define curcpu() ((struct cpu_info *)mfpr(PR_SSP))
#define curproc (curcpu()->ci_curproc)
#define cpu_number() (curcpu()->ci_dev->dv_unit)
#define ci_cpuid ci_dev->dv_unit
#define need_resched(ci) {(ci)->ci_want_resched++; mtpr(AST_OK,PR_ASTLVL); }
#if defined(MULTIPROCESSOR)
#define CPU_IS_PRIMARY(ci) ((ci)->ci_flags & CI_MASTERCPU)
extern char tramp;
#endif
/*
* Notify the current process (p) that it has a signal pending,
* process as soon as possible.
*/
#define signotify(p) mtpr(AST_OK,PR_ASTLVL);
/*
* 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) {(p)->p_flag |= P_OWEUPC; mtpr(AST_OK,PR_ASTLVL); }
/*
* This defines the I/O device register space size in pages.
*/
#define IOSPSZ ((64*1024) / VAX_NBPG) /* 64k == 128 pages */
struct device;
/* Some low-level prototypes */
#if defined(MULTIPROCESSOR)
void cpu_slavesetup(struct device *);
void cpu_boot_secondary_processors(void);
void cpu_send_ipi(int, int);
void cpu_handle_ipi(void);
#endif
int badaddr(caddr_t, int);
void cpu_swapin(struct proc *);
void dumpconf(void);
void dumpsys(void);
void swapconf(void);
void disk_printtype(int, int);
void disk_reallymapin(struct buf *, struct pte *, int, int);
vaddr_t vax_map_physmem(paddr_t, int);
void vax_unmap_physmem(vaddr_t, int);
void ioaccess(vaddr_t, paddr_t, int);
void iounaccess(vaddr_t, int);
void findcpu(void);
int getmajor(void *);
#ifdef DDB
int kdbrint(int);
#endif
#endif /* _KERNEL */
#ifdef _STANDALONE
void findcpu(void);
#endif
#endif /* _VAX_CPU_H_ */