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inline spl functions.

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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
This commit is contained in:
Andrew Gallatin 1999-11-29 20:31:45 +00:00
parent 33f1cb93f9
commit 7b64f69f80
2 changed files with 62 additions and 71 deletions
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54
sys/alpha/alpha/ipl_funcs.c
View File

@ -165,57 +165,3 @@ GENSET(schedsoftcambio, &idelayed, 1 << SWI_CAMBIO)
GENSET(schedsoftvm, &idelayed, 1 << SWI_VM)
GENSET(schedsoftclock, &idelayed, 1 << SWI_CLOCK)
#define SPLDOWN(name, pri) \
\
int name(void) \
{ \
int s; \
s = alpha_pal_swpipl(ALPHA_PSL_IPL_##pri); \
return s; \
}
SPLDOWN(splsoftclock, SOFT)
SPLDOWN(splsoft, SOFT)
#define SPLUP(name, pri) \
\
int name(void) \
{ \
int cpl = getcpl(); \
if (ALPHA_PSL_IPL_##pri > cpl) { \
int s = alpha_pal_swpipl(ALPHA_PSL_IPL_##pri); \
return s; \
} else \
return cpl; \
}
SPLUP(splsoftcam, SOFT)
SPLUP(splsoftnet, SOFT)
SPLUP(splsoftvm, SOFT)
SPLUP(splnet, IO)
SPLUP(splbio, IO)
SPLUP(splcam, IO)
SPLUP(splimp, IO)
SPLUP(spltty, IO)
SPLUP(splvm, IO)
SPLUP(splclock, CLOCK)
SPLUP(splstatclock, CLOCK)
SPLUP(splhigh, HIGH)
void
spl0()
{
if (ipending)
do_sir(); /* lowers ipl to SOFT */
alpha_pal_swpipl(ALPHA_PSL_IPL_0);
}
void
splx(int s)
{
if (s)
alpha_pal_swpipl(s);
else
spl0();
}

79
sys/alpha/include/ipl.h
View File

@ -29,6 +29,9 @@
#ifndef _MACHINE_IPL_H_
#define _MACHINE_IPL_H_
#include <machine/cpu.h> /* for pal inlines */
/*
* Software interrupt bit numbers
*/
@ -41,20 +44,65 @@
#define NSWI 32
#define NHWI 0
extern int splsoft(void);
extern int splsoftclock(void);
extern int splsoftnet(void);
extern int splsoftcam(void);
extern int splsoftvm(void);
extern int splnet(void);
extern int splbio(void);
extern int splcam(void);
extern int splimp(void);
extern int spltty(void);
extern int splvm(void);
extern int splclock(void);
extern int splstatclock(void);
extern int splhigh(void);
extern u_int32_t ipending;
#define getcpl() (alpha_pal_rdps() & ALPHA_PSL_IPL_MASK)
#define SPLDOWN(name, pri) \
\
static __inline int name(void) \
{ \
int s; \
s = alpha_pal_swpipl(ALPHA_PSL_IPL_##pri); \
return s; \
}
SPLDOWN(splsoftclock, SOFT)
SPLDOWN(splsoft, SOFT)
#define SPLUP(name, pri) \
\
static __inline int name(void) \
{ \
int cpl = getcpl(); \
if (ALPHA_PSL_IPL_##pri > cpl) { \
int s = alpha_pal_swpipl(ALPHA_PSL_IPL_##pri); \
return s; \
} else \
return cpl; \
}
SPLUP(splsoftcam, SOFT)
SPLUP(splsoftnet, SOFT)
SPLUP(splsoftvm, SOFT)
SPLUP(splnet, IO)
SPLUP(splbio, IO)
SPLUP(splcam, IO)
SPLUP(splimp, IO)
SPLUP(spltty, IO)
SPLUP(splvm, IO)
SPLUP(splclock, CLOCK)
SPLUP(splstatclock, CLOCK)
SPLUP(splhigh, HIGH)
static __inline void
spl0(void)
{
if (ipending)
do_sir(); /* lowers ipl to SOFT */
alpha_pal_swpipl(ALPHA_PSL_IPL_0);
}
static __inline void
splx(int s)
{
if (s)
alpha_pal_swpipl(s);
else
spl0();
}
extern void setdelayed(void);
extern void setsofttty(void);
@ -71,9 +119,6 @@ extern void schedsoftcambio(void);
extern void schedsoftvm(void);
extern void schedsoftclock(void);
extern void spl0(void);
extern void splx(int);
#if 0
/* XXX bogus */
extern unsigned cpl; /* current priority level mask */