7b64f69f80
In combination with Doug's recent alpha_cpu.h, this reduces the cost of ipl raising/lowering significantly. This is most pronounced when doing file reads. Reviewed by: dfr
128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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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_IPL_H_
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#define _MACHINE_IPL_H_
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#include <machine/cpu.h> /* for pal inlines */
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/*
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* Software interrupt bit numbers
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*/
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#define SWI_TTY 0
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#define SWI_NET 1
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#define SWI_CAMNET 2
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#define SWI_CAMBIO 3
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#define SWI_VM 4
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#define SWI_CLOCK 5
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#define NSWI 32
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#define NHWI 0
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extern u_int32_t ipending;
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#define getcpl() (alpha_pal_rdps() & ALPHA_PSL_IPL_MASK)
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#define SPLDOWN(name, pri) \
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\
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static __inline int name(void) \
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{ \
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int s; \
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s = alpha_pal_swpipl(ALPHA_PSL_IPL_##pri); \
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return s; \
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}
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SPLDOWN(splsoftclock, SOFT)
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SPLDOWN(splsoft, SOFT)
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#define SPLUP(name, pri) \
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\
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static __inline int name(void) \
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{ \
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int cpl = getcpl(); \
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if (ALPHA_PSL_IPL_##pri > cpl) { \
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int s = alpha_pal_swpipl(ALPHA_PSL_IPL_##pri); \
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return s; \
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} else \
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return cpl; \
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}
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SPLUP(splsoftcam, SOFT)
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SPLUP(splsoftnet, SOFT)
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SPLUP(splsoftvm, SOFT)
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SPLUP(splnet, IO)
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SPLUP(splbio, IO)
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SPLUP(splcam, IO)
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SPLUP(splimp, IO)
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SPLUP(spltty, IO)
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SPLUP(splvm, IO)
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SPLUP(splclock, CLOCK)
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SPLUP(splstatclock, CLOCK)
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SPLUP(splhigh, HIGH)
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static __inline void
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spl0(void)
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{
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if (ipending)
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do_sir(); /* lowers ipl to SOFT */
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alpha_pal_swpipl(ALPHA_PSL_IPL_0);
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}
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static __inline void
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splx(int s)
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{
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if (s)
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alpha_pal_swpipl(s);
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else
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spl0();
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}
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extern void setdelayed(void);
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extern void setsofttty(void);
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extern void setsoftnet(void);
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extern void setsoftcamnet(void);
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extern void setsoftcambio(void);
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extern void setsoftvm(void);
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extern void setsoftclock(void);
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extern void schedsofttty(void);
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extern void schedsoftnet(void);
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extern void schedsoftcamnet(void);
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extern void schedsoftcambio(void);
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extern void schedsoftvm(void);
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extern void schedsoftclock(void);
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#if 0
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/* XXX bogus */
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extern unsigned cpl; /* current priority level mask */
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#endif
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#endif /* !_MACHINE_MD_VAR_H_ */
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