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37b087a645
- stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
103 lines
4.2 KiB
C
103 lines
4.2 KiB
C
/*-
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* Copyright (c) 1995 Bruce D. Evans.
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* All rights reserved.
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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. Neither the name of the author nor the names of 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 AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#ifndef _MACHINE_MD_VAR_H_
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#define _MACHINE_MD_VAR_H_
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/*
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* Miscellaneous machine-dependent declarations.
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*/
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extern int Maxmem;
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extern u_int atdevbase; /* offset in virtual memory of ISA io mem */
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extern void (*bcopy_vector) __P((const void *from, void *to, size_t len));
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extern int busdma_swi_pending;
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extern int (*copyin_vector) __P((const void *udaddr, void *kaddr,
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size_t len));
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extern int (*copyout_vector) __P((const void *kaddr, void *udaddr,
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size_t len));
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extern u_int cpu_feature;
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extern u_int cpu_high;
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extern u_int cpu_id;
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extern char cpu_vendor[];
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extern u_int cyrix_did;
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extern char kstack[];
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#ifdef PC98
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extern int need_pre_dma_flush;
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extern int need_post_dma_flush;
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#endif
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extern void (*netisrs[32]) __P((void));
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extern int nfs_diskless_valid;
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extern void (*ovbcopy_vector) __P((const void *from, void *to, size_t len));
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extern char sigcode[];
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extern int szsigcode, szosigcode;
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typedef void alias_for_inthand_t __P((u_int cs, u_int ef, u_int esp, u_int ss));
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struct proc;
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struct reg;
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struct fpreg;
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struct dbreg;
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void bcopyb __P((const void *from, void *to, size_t len));
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void busdma_swi __P((void));
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void cpu_halt __P((void));
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void cpu_reset __P((void));
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void cpu_setregs __P((void));
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void cpu_switch_load_gs __P((void)) __asm(__STRING(cpu_switch_load_gs));
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void doreti_iret __P((void)) __asm(__STRING(doreti_iret));
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void doreti_iret_fault __P((void)) __asm(__STRING(doreti_iret_fault));
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void doreti_popl_ds __P((void)) __asm(__STRING(doreti_popl_ds));
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void doreti_popl_ds_fault __P((void)) __asm(__STRING(doreti_popl_ds_fault));
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void doreti_popl_es __P((void)) __asm(__STRING(doreti_popl_es));
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void doreti_popl_es_fault __P((void)) __asm(__STRING(doreti_popl_es_fault));
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void doreti_popl_fs __P((void)) __asm(__STRING(doreti_popl_fs));
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void doreti_popl_fs_fault __P((void)) __asm(__STRING(doreti_popl_fs_fault));
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int fill_fpregs __P((struct proc *, struct fpreg *));
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int fill_regs __P((struct proc *p, struct reg *regs));
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int fill_dbregs __P((struct proc *p, struct dbreg *dbregs));
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void fillw __P((int /*u_short*/ pat, void *base, size_t cnt));
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void i486_bzero __P((void *buf, size_t len));
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void i586_bcopy __P((const void *from, void *to, size_t len));
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void i586_bzero __P((void *buf, size_t len));
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int i586_copyin __P((const void *udaddr, void *kaddr, size_t len));
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int i586_copyout __P((const void *kaddr, void *udaddr, size_t len));
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void i686_pagezero __P((void *addr));
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int is_physical_memory __P((vm_offset_t addr));
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u_long kvtop __P((void *addr));
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void setidt __P((int idx, alias_for_inthand_t *func, int typ, int dpl,
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int selec));
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void swi_vm __P((void));
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void userconfig __P((void));
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int user_dbreg_trap __P((void));
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int vm_page_zero_idle __P((void));
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#endif /* !_MACHINE_MD_VAR_H_ */
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