137 lines
4.5 KiB
C
137 lines
4.5 KiB
C
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* 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: @(#)psl.h 5.2 (Berkeley) 1/18/91
|
|
* $Id: psl.h,v 1.11 1994/08/13 06:55:47 mycroft Exp $
|
|
*/
|
|
|
|
#ifndef _I386_PSL_H_
|
|
#define _I386_PSL_H_
|
|
|
|
/*
|
|
* 386 processor status longword.
|
|
*/
|
|
#define PSL_C 0x00000001 /* carry bit */
|
|
#define PSL_PF 0x00000004 /* parity bit */
|
|
#define PSL_AF 0x00000010 /* bcd carry bit */
|
|
#define PSL_Z 0x00000040 /* zero bit */
|
|
#define PSL_N 0x00000080 /* negative bit */
|
|
#define PSL_T 0x00000100 /* trace enable bit */
|
|
#define PSL_I 0x00000200 /* interrupt enable bit */
|
|
#define PSL_D 0x00000400 /* string instruction direction bit */
|
|
#define PSL_V 0x00000800 /* overflow bit */
|
|
#define PSL_IOPL 0x00003000 /* i/o priviledge level enable */
|
|
#define PSL_NT 0x00004000 /* nested task bit */
|
|
#define PSL_RF 0x00010000 /* restart flag bit */
|
|
#define PSL_VM 0x00020000 /* virtual 8086 mode bit */
|
|
#define PSL_AC 0x00040000 /* alignment checking */
|
|
#define PSL_VIF 0x00080000 /* virtual interrupt enable */
|
|
#define PSL_VIP 0x00100000 /* virtual interrupt pending */
|
|
#define PSL_ID 0x00200000 /* identification bit */
|
|
|
|
#define PSL_MBO 0x00000002 /* must be one bits */
|
|
#define PSL_MBZ 0xffc08028 /* must be zero bits */
|
|
|
|
#define PSL_USERSET (PSL_MBO | PSL_I)
|
|
#define PSL_USERCLR (PSL_MBZ | PSL_VIP | PSL_VIF | PSL_NT | PSL_VM)
|
|
|
|
#ifdef KERNEL
|
|
#define IPL_NONE -1
|
|
#define IPL_BIO 0
|
|
#define IPL_NET 1
|
|
#define IPL_TTY 2
|
|
#define IPL_CLOCK 3
|
|
|
|
#define SIR_CLOCK 31
|
|
#define SIR_CLOCKMASK (1 << SIR_CLOCK)
|
|
#define SIR_NET 30
|
|
#define SIR_NETMASK ((1 << SIR_NET) | SIR_CLOCKMASK)
|
|
#define SIR_TTY 29
|
|
#define SIR_TTYMASK ((1 << SIR_TTY) | SIR_CLOCKMASK)
|
|
|
|
#ifndef LOCORE
|
|
int cpl, ipending, astpending, imask[4];
|
|
|
|
#define SPL(name, adjust) \
|
|
static __inline int \
|
|
__CONCAT(spl,name)() \
|
|
{ \
|
|
register int ocpl = cpl; \
|
|
adjust; \
|
|
return ocpl; \
|
|
}
|
|
|
|
SPL(bio, cpl |= imask[IPL_BIO])
|
|
SPL(imp, cpl |= imask[IPL_NET])
|
|
SPL(tty, cpl |= imask[IPL_TTY])
|
|
SPL(clock, cpl |= imask[IPL_CLOCK])
|
|
#define splstatclock() splclock()
|
|
SPL(high, cpl = -1)
|
|
/*
|
|
* splsoftclock() is used by hardclock() to lower the priority from clock to
|
|
* softclock before it calls softclock().
|
|
*/
|
|
SPL(softclock, cpl = SIR_CLOCKMASK)
|
|
SPL(softnet, cpl |= SIR_NETMASK)
|
|
#define splnet() splsoftnet()
|
|
SPL(softtty, cpl |= SIR_TTYMASK)
|
|
|
|
static __inline void
|
|
spl0()
|
|
{
|
|
cpl = 0;
|
|
if (ipending)
|
|
spllower();
|
|
}
|
|
|
|
static __inline void
|
|
splx(ncpl)
|
|
register int ncpl;
|
|
{
|
|
cpl = ncpl;
|
|
if (ipending & ~ncpl)
|
|
spllower();
|
|
}
|
|
|
|
#define softintr(n) (ipending |= (1 << (n)))
|
|
#define setsoftast() (astpending = 1)
|
|
#define setsoftclock() softintr(SIR_CLOCK)
|
|
#define setsoftnet() softintr(SIR_NET)
|
|
#define setsofttty() softintr(SIR_TTY)
|
|
#endif /* !LOCORE */
|
|
#endif /* KERNEL */
|
|
|
|
#endif /* !_I386_PSL_H_ */
|