8f965dc2c3
exceptions from both kernel and user mode. * Fix context switching so that we can switch back to a proc which we switched away from (we were saving the state in the wrong place). * Implement lazy switching of the high-fp state. This needs to be looked at again for SMP to cope with the case of a process migrating from one processor to another while it has the high-fp state. * Make setregs() work properly. I still think this should be called cpu_exec() or something. * Various other minor fixes. With this lot, we can execve() /sbin/init and we get all the way up to its first syscall. At that point, we stop because syscall handling is not done yet.
63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/*-
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* Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
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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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*
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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_GLOBALS_H_
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#define _MACHINE_GLOBALS_H_
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#ifdef _KERNEL
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register struct globaldata *globalp __asm__("r13");
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#if 1
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#define GLOBALP globalp
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#else
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#define GLOBALP ((struct globaldata *) alpha_pal_rdval())
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#endif
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#define PCPU_GET(name) (GLOBALP->gd_##name)
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#define PCPU_SET(name,value) (GLOBALP->gd_##name = (value))
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/*
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* The following set of macros works for UP kernel as well, but for maximum
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* performance we allow the global variables to be accessed directly. On the
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* other hand, kernel modules should always use these macros to maintain
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* portability between UP and SMP kernels.
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*/
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#define CURPROC PCPU_GET(curproc)
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#define curproc PCPU_GET(curproc)
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#define idleproc PCPU_GET(idleproc)
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#define curpcb PCPU_GET(curpcb)
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#define switchtime PCPU_GET(switchtime)
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#define switchticks PCPU_GET(switchticks)
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#define cpuid PCPU_GET(cpuno)
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#define prevproc PCPU_GET(curproc) /* XXX - until ithreads */
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#endif /* _KERNEL */
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#endif /* !_MACHINE_GLOBALS_H_ */
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