mirror of
https://git.FreeBSD.org/src.git
synced 2024-11-22 07:20:00 +00:00
Rewrite almost everything.
Alphabetize.
Write all i/o functions in sleep so that we don't use anything from
NetBSD.
Restore the correct type of u_int for ports. This saves a whole cycle
per i/o on 486's.
Change `inline' back to __inline to avoid compiler warnings with
-Wreally-all.
Don't implement bdb() unless BDE_DEBUGGER is defined. Declare bdb_exists
outside the function to avoid hundreds of compiler warnings.
Let the compiler pick the register in asms if possible.
Implement ffs() using inline asm(). gcc provides a slightly different
one. It was broken in gcc-2.4.5 but works now. Declaring a correct
version inline ensures getting a correct version. FreeBSD-1.1.5 has
an slow inline version but FreeBSD-2.0 has a library version (which
probably never gets used).
Do inb() and outb() without using %edx for constant ports below 0x100.
Remove casts to the same type in queue functions.
Declare prototypes for everything implemented i386/*.s and also for
everything that is normally implemented as an inline here (I don't
like the current complete dependency on gcc). Ifdef out the prototypes
that are declared elsewhere. THere should be a separate header to
declare things implemented in i386/*.s, but then it would be harder
to override declarations with inlines.
${UII}
This commit is contained in:
Bruce Evans
parent
663f148514
commit
004bedeb68
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=4479
@ -30,238 +30,405 @@
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
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||||
*
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||||
*
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||||
* Portions:
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||||
* Copyright (c) 1993 Charles Hannum.
|
||||
* All rights reserved.
|
||||
*
|
||||
* 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 Charles Hannum.
|
||||
* 4. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
||||
*
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||||
*
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||||
* $Id: cpufunc.h,v 1.27 1994/09/25 21:31:55 davidg Exp $
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* $Id: cpufunc.h,v 1.28 1994/11/09 00:51:38 bde Exp $
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*/
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/*
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* Functions to provide access to special i386 instructions.
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* XXX - bezillions more are defined in locore.s but are not declared anywhere.
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*/
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#ifndef _MACHINE_CPUFUNC_H_
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#define _MACHINE_CPUFUNC_H_ 1
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#define _MACHINE_CPUFUNC_H_
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <machine/spl.h>
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#include <machine/spl.h> /* XXX belongs elsewhere */
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#ifdef __GNUC__
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static __inline void
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insb(u_short port, void *addr, int cnt)
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#ifdef BDE_DEBUGGER
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extern int bdb_exists;
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static __inline int
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bdb(void)
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{
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__asm __volatile("cld;repne;insb" :
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: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
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}
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static __inline void
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insw(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld;repne;insw" :
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: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
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}
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static __inline void
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insl(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld;repne;insl" :
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: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
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}
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static __inline void
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outsb(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld;repne;outsb" :
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: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
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}
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static __inline void
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outsw(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld;repne;outsw" :
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: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
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}
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static __inline void
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outsl(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld;repne;outsl" :
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: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
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}
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static inline u_char
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inb(u_short port)
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{
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u_char data;
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__asm __volatile("inb %1,%0" : "=a" (data) : "d" (port));
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return data;
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}
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static inline u_short
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inw(u_short port)
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{
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u_short data;
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__asm __volatile("inw %1,%0" : "=a" (data) : "d" (port));
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return data;
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}
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static inline u_long
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inl(u_short port)
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{
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u_long data;
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__asm __volatile("inl %1,%0" : "=a" (data) : "d" (port));
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return data;
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}
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static inline void
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outb(u_short port, u_char val)
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{
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__asm __volatile("outb %0,%1" : :"a" (val), "d" (port));
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}
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static inline void
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outw(u_short port, u_short val)
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{
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__asm __volatile("outw %0,%1" : :"a" (val), "d" (port));
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}
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static inline void
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outl(u_short port, u_long val)
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{
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__asm __volatile("outl %0,%1" : :"a" (val), "d" (port));
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}
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static inline int bdb(void)
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{
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extern int bdb_exists;
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if (!bdb_exists)
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return (0);
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__asm("int $3");
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__asm __volatile("int $3");
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return (1);
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}
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#endif /* BDE_DEBUGGER */
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static inline void
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static __inline void
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disable_intr(void)
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{
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__asm __volatile("cli");
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}
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static inline void
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static __inline void
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enable_intr(void)
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{
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__asm __volatile("sti");
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}
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static inline u_long
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read_eflags()
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#define HAVE_INLINE_FFS
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static __inline int
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ffs(int mask)
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{
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u_long ef;
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__asm __volatile("pushf; popl %0" : "=a" (ef));
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return(ef);
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int result;
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/*
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* bsfl turns out to be not all that slow on 486's. It can beaten
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* using a binary search to reduce to 4 bits and then a table lookup,
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* but only if the code is inlined and in the cache, and the code
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* is quite large so inlining it probably busts the cache.
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*
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* Note that gcc-2's builtin ffs would be used if we didn't declare
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* this inline or turn off the builtin. The builtin is faster but
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* broken in gcc-2.4.5 and slower but working in gcc-2.5 and 2.6.
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*/
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__asm __volatile("testl %0,%0; je 1f; bsfl %0,%0; incl %0; 1:"
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: "=r" (result) : "0" (mask));
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return (result);
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}
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static inline void
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write_eflags(u_long ef)
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#if __GNUC__ < 2
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#define inb(port) inbv(port)
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#define outb(port, data) outbv(port, data)
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#else /* __GNUC >= 2 */
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/*
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* Use an expression-statement instead of a conditional expression
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* because gcc-2.6.0 would promote the operands of the conditional
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* and produce poor code for "if ((inb(var) & const1) == const2)".
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*/
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#define inb(port) ({ \
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u_char _data; \
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if (__builtin_constant_p((int) (port)) && (port) < 256ul) \
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_data = inbc(port); \
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else \
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_data = inbv(port); \
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_data; })
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#define outb(port, data) \
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(__builtin_constant_p((int) (port)) && (port) < 256ul \
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? outbc(port, data) : outbv(port, data))
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static __inline u_char
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inbc(u_int port)
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{
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__asm __volatile("pushl %0; popf" : : "a" ((u_long) ef));
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u_char data;
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__asm __volatile("inb %1,%0" : "=a" (data) : "i" (port));
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return (data);
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}
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static inline void
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pmap_update()
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static __inline void
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outbc(u_int port, u_char data)
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{
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__asm __volatile("movl %%cr3, %%eax; movl %%eax, %%cr3" : : : "ax");
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__asm __volatile("outb %0,%1" : : "a" (data), "i" (port));
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}
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static inline u_long
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rcr2()
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#endif /* __GNUC <= 2 */
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static __inline u_char
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inbv(u_int port)
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{
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u_char data;
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/*
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* We use %%dx and not %1 here because i/o is done at %dx and not at
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* %edx, while gcc generates inferior code (movw instead of movl)
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* if we tell it to load (u_short) port.
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*/
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__asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
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return (data);
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}
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static __inline u_long
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inl(u_int port)
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{
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u_long data;
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__asm __volatile("movl %%cr2,%%eax" : "=a" (data));
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return data;
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__asm __volatile("inl %%dx,%0" : "=a" (data) : "d" (port));
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return (data);
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}
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static __inline void
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insb(u_int port, void *addr, size_t cnt)
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{
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__asm __volatile("cld; rep; insb"
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: : "d" (port), "D" (addr), "c" (cnt)
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: "di", "cx", "memory");
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}
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static __inline void
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insw(u_int port, void *addr, size_t cnt)
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{
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__asm __volatile("cld; rep; insw"
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: : "d" (port), "D" (addr), "c" (cnt)
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: "di", "cx", "memory");
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}
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static __inline void
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insl(u_int port, void *addr, size_t cnt)
|
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{
|
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__asm __volatile("cld; rep; insl"
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: : "d" (port), "D" (addr), "c" (cnt)
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: "di", "cx", "memory");
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}
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static __inline u_short
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inw(u_int port)
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{
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u_short data;
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__asm __volatile("inw %%dx,%0" : "=a" (data) : "d" (port));
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return (data);
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}
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static __inline void
|
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outbv(u_int port, u_char data)
|
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{
|
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u_char al;
|
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/*
|
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* Use an unnecessary assignment to help gcc's register allocator.
|
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* This make a large difference for gcc-1.40 and a tiny difference
|
||||
* for gcc-2.6.0. For gcc-1.40, al had to be ``asm("ax")'' for
|
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* best results. gcc-2.6.0 can't handle this.
|
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*/
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al = data;
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__asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
|
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}
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|
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static __inline void
|
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outl(u_int port, u_long data)
|
||||
{
|
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/*
|
||||
* outl() and outw() aren't used much so we haven't looked at
|
||||
* possible micro-optimizations such as the unnecessary
|
||||
* assignment for them.
|
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*/
|
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__asm __volatile("outl %0,%%dx" : : "a" (data), "d" (port));
|
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}
|
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|
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static __inline void
|
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outsb(u_int port, void *addr, size_t cnt)
|
||||
{
|
||||
__asm __volatile("cld; rep; outsb"
|
||||
: : "d" (port), "S" (addr), "c" (cnt)
|
||||
: "di", "cx");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outsw(u_int port, void *addr, size_t cnt)
|
||||
{
|
||||
__asm __volatile("cld; rep; outsw"
|
||||
: : "d" (port), "S" (addr), "c" (cnt)
|
||||
: "di", "cx");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outsl(u_int port, void *addr, size_t cnt)
|
||||
{
|
||||
__asm __volatile("cld; rep; outsl"
|
||||
: : "d" (port), "S" (addr), "c" (cnt)
|
||||
: "di", "cx");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outw(u_int port, u_short data)
|
||||
{
|
||||
__asm __volatile("outw %0,%%dx" : : "a" (data), "d" (port));
|
||||
}
|
||||
|
||||
static __inline void
|
||||
pmap_update(void)
|
||||
{
|
||||
u_long temp;
|
||||
/*
|
||||
* This should be implemented as load_cr3(rcr3()) when load_cr3()
|
||||
* is inlined.
|
||||
*/
|
||||
__asm __volatile("movl %%cr3, %0; movl %0, %%cr3" : "=r" (temp));
|
||||
}
|
||||
|
||||
static __inline u_long
|
||||
rcr2(void)
|
||||
{
|
||||
u_long data;
|
||||
|
||||
__asm __volatile("movl %%cr2,%0" : "=r" (data));
|
||||
return (data);
|
||||
}
|
||||
|
||||
static __inline u_long
|
||||
read_eflags(void)
|
||||
{
|
||||
u_long ef;
|
||||
|
||||
__asm __volatile("pushfl; popl %0" : "=r" (ef));
|
||||
return (ef);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
write_eflags(u_long ef)
|
||||
{
|
||||
__asm __volatile("pushl %0; popfl" : : "r" (ef));
|
||||
}
|
||||
|
||||
/*
|
||||
* XXX queue stuff belongs elsewhere.
|
||||
*/
|
||||
struct quehead {
|
||||
struct quehead *qh_link;
|
||||
struct quehead *qh_rlink;
|
||||
};
|
||||
|
||||
static inline void
|
||||
static __inline void
|
||||
insque(void *a, void *b)
|
||||
{
|
||||
register struct quehead *element = a, *head = b;
|
||||
struct quehead *element = a, *head = b;
|
||||
|
||||
element->qh_link = head->qh_link;
|
||||
head->qh_link = (struct quehead *)element;
|
||||
element->qh_rlink = (struct quehead *)head;
|
||||
((struct quehead *)(element->qh_link))->qh_rlink
|
||||
= (struct quehead *)element;
|
||||
head->qh_link = element;
|
||||
element->qh_rlink = head;
|
||||
element->qh_link->qh_rlink = element;
|
||||
}
|
||||
|
||||
static inline void
|
||||
static __inline void
|
||||
remque(void *a)
|
||||
{
|
||||
register struct quehead *element = a;
|
||||
((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
|
||||
((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
|
||||
struct quehead *element = a;
|
||||
|
||||
element->qh_link->qh_rlink = element->qh_rlink;
|
||||
element->qh_rlink->qh_link = element->qh_link;
|
||||
element->qh_rlink = 0;
|
||||
}
|
||||
|
||||
#else /* not __GNUC__ */
|
||||
extern void insque __P((void *, void *));
|
||||
extern void remque __P((void *));
|
||||
#else /* !__GNUC__ */
|
||||
|
||||
int bdb __P((void));
|
||||
void disable_intr __P((void));
|
||||
void enable_intr __P((void));
|
||||
u_char inb __P((u_int port));
|
||||
void outb __P((u_int port, u_int data)); /* XXX - incompat */
|
||||
u_long inl __P((u_int port));
|
||||
void insb __P((u_int port, void *addr, size_t cnt));
|
||||
void insl __P((u_int port, void *addr, size_t cnt));
|
||||
void insw __P((u_int port, void *addr, size_t cnt));
|
||||
u_short inw __P((u_int port));
|
||||
void outb __P((u_int port, u_char data));
|
||||
void outl __P((u_int port, u_long data));
|
||||
void outsb __P((u_int port, void *addr, size_t cnt));
|
||||
void outsl __P((u_int port, void *addr, size_t cnt));
|
||||
void outsw __P((u_int port, void *addr, size_t cnt));
|
||||
void outw __P((u_int port, u_short data));
|
||||
void void pmap_update __P((void));
|
||||
u_long read_eflags __P((void));
|
||||
u_long rcr2 __P((void));
|
||||
void write_eflags __P((u_long ef));
|
||||
|
||||
void insque __P((void *a, void *b));
|
||||
void remque __P((void *a))
|
||||
|
||||
#endif /* __GNUC__ */
|
||||
|
||||
void load_cr0 __P((u_int cr0));
|
||||
u_int rcr0 __P((void));
|
||||
void load_cr3(u_long);
|
||||
u_long rcr3(void);
|
||||
/*
|
||||
* XXX the following declarations document garbage in support.s.
|
||||
* gcc hasn't needed _divsi* for years.
|
||||
* bcopy[bwx]() was used by pccons but isn't used now.
|
||||
*/
|
||||
int __divsi3 __P((int factor1, int factor2));
|
||||
u_int __udivsi3 __P((u_int factor1, u_int factor2));
|
||||
void bcopyb __P((const void *from, void *to, size_t len));
|
||||
void bcopyw __P((const void *from, void *to, size_t len));
|
||||
void bcopyx __P((const void *from, void *to, size_t len,
|
||||
int stride));
|
||||
|
||||
void setidt __P((int, void (*)(), int, int));
|
||||
extern u_long kvtop(void *);
|
||||
extern void fillw(int /*u_short*/, void *, size_t);
|
||||
extern void filli(int, void *, size_t);
|
||||
#if 0
|
||||
/*
|
||||
* These functions in support.s are declared elsewhere.
|
||||
*/
|
||||
void bcopy __P((const void *from, void *to, size_t len));
|
||||
void blkclr __P((void *buf, size_t len));
|
||||
void bzero __P((void *buf, size_t len));
|
||||
int copyin __P((void *udaddr, void *kaddr, size_t len));
|
||||
int copyinstr __P((void *udaddr, void *kaddr, size_t len,
|
||||
size_t *lencopied));
|
||||
int copyout __P((void *kaddr, void *udaddr, size_t len));
|
||||
int copystr __P((void *kfaddr, void *kdaddr, size_t len,
|
||||
size_t *lencopied));
|
||||
int fubyte __P((void *base));
|
||||
int fuswintr __P((void *base));
|
||||
int fuibyte __P((void *base));
|
||||
int fuword __P((void *base));
|
||||
struct region_descriptor;
|
||||
void lgdt __P((struct region_descriptor *rdp));
|
||||
void lidt __P((struct region_descriptor *rdp));
|
||||
void lldt __P((u_short sel));
|
||||
/*
|
||||
* longjmp() and setjmp() are only used by ddb. They probably shouldn't
|
||||
* shouldn't be supported in the kernel.
|
||||
*/
|
||||
#include <setjmp.h>
|
||||
void longjmp __P((jmp_buf jb, int rv));
|
||||
void ovbcopy __P((const void *from, void *to, size_t len);
|
||||
int setjmp __P((jmp_buf jb));
|
||||
struct soft_segment_descriptor;
|
||||
union descriptor;
|
||||
int ssdtosd __P((struct soft_segment_descriptor *ssdp,
|
||||
union descriptor *sdp));
|
||||
int subyte __P((void *base, int byte));
|
||||
int suibyte __P((void *base, int byte));
|
||||
int suswintr __P((void *base, int word));
|
||||
int suword __P((void *base, int word));
|
||||
|
||||
#endif /* _MACHINE_CPUFUNC_H_ */
|
||||
/*
|
||||
* These functions in support.s are declared elsewhere, but never used.
|
||||
* A silly amount of effort went into copyoutstr(). It's not worth
|
||||
* maintaining, since the string length is usually known so copyout
|
||||
* works better, or is easy to find so copyout() can be used.
|
||||
*/
|
||||
int copyoutstr __P((void *kaddr, void *udaddr, size_t len,
|
||||
size_t *lencopied));
|
||||
int fuiword __P((void *base));
|
||||
int suiword __P((void *base, int word));
|
||||
|
||||
/*
|
||||
* These functions in support.s are also in libkern.a and are declared in
|
||||
* libkern.h.
|
||||
* ffs() is built in to gcc-2 and was buggy in gcc-2.4.5 so we may may the
|
||||
* buggy version if we don't replace it by an inline.
|
||||
*/
|
||||
int bcmp __P((const void *b1, const void *b2, size_t length));
|
||||
int ffs __P((int mask));
|
||||
#endif /* 0 */
|
||||
|
||||
/*
|
||||
* These variables and functions in support.s are used.
|
||||
*/
|
||||
extern u_int atdevbase; /* offset in virtual memory of ISA io mem */
|
||||
|
||||
void filli __P((int pat, void *base, size_t cnt));
|
||||
void fillw __P((int /*u_short*/ pat, void *base, size_t cnt));
|
||||
int fusword __P((void *base));
|
||||
void load_cr0 __P((u_long cr0));
|
||||
void load_cr3 __P((u_long cr3));
|
||||
void ltr __P((u_short sel));
|
||||
u_int rcr0 __P((void));
|
||||
u_long rcr3 __P((void));
|
||||
int rtcin __P((int val));
|
||||
int susword __P((void *base, int word));
|
||||
|
||||
/*
|
||||
* These functions are NOT in support.s and should be declared elsewhere.
|
||||
*/
|
||||
u_long kvtop __P((void *addr));
|
||||
typedef void alias_for_inthand_t __P((u_int cs, u_int ef, u_int esp,
|
||||
u_int ss));
|
||||
void setidt __P((int idx, alias_for_inthand_t *func, int typ,
|
||||
int dpl));
|
||||
|
||||
#endif /* !_MACHINE_CPUFUNC_H_ */
|
||||
|
||||
@ -30,238 +30,405 @@
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
*
|
||||
* Portions:
|
||||
* Copyright (c) 1993 Charles Hannum.
|
||||
* All rights reserved.
|
||||
*
|
||||
* 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 Charles Hannum.
|
||||
* 4. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
||||
*
|
||||
*
|
||||
* $Id: cpufunc.h,v 1.27 1994/09/25 21:31:55 davidg Exp $
|
||||
* $Id: cpufunc.h,v 1.28 1994/11/09 00:51:38 bde Exp $
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
* Functions to provide access to special i386 instructions.
|
||||
* XXX - bezillions more are defined in locore.s but are not declared anywhere.
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_CPUFUNC_H_
|
||||
#define _MACHINE_CPUFUNC_H_ 1
|
||||
#define _MACHINE_CPUFUNC_H_
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
#include <sys/types.h>
|
||||
|
||||
#include <machine/spl.h>
|
||||
#include <machine/spl.h> /* XXX belongs elsewhere */
|
||||
|
||||
#ifdef __GNUC__
|
||||
|
||||
static __inline void
|
||||
insb(u_short port, void *addr, int cnt)
|
||||
#ifdef BDE_DEBUGGER
|
||||
extern int bdb_exists;
|
||||
|
||||
static __inline int
|
||||
bdb(void)
|
||||
{
|
||||
__asm __volatile("cld;repne;insb" :
|
||||
: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
insw(u_short port, void *addr, int cnt)
|
||||
{
|
||||
__asm __volatile("cld;repne;insw" :
|
||||
: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
insl(u_short port, void *addr, int cnt)
|
||||
{
|
||||
__asm __volatile("cld;repne;insl" :
|
||||
: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outsb(u_short port, void *addr, int cnt)
|
||||
{
|
||||
__asm __volatile("cld;repne;outsb" :
|
||||
: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outsw(u_short port, void *addr, int cnt)
|
||||
{
|
||||
__asm __volatile("cld;repne;outsw" :
|
||||
: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outsl(u_short port, void *addr, int cnt)
|
||||
{
|
||||
__asm __volatile("cld;repne;outsl" :
|
||||
: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
|
||||
}
|
||||
|
||||
static inline u_char
|
||||
inb(u_short port)
|
||||
{
|
||||
u_char data;
|
||||
|
||||
__asm __volatile("inb %1,%0" : "=a" (data) : "d" (port));
|
||||
return data;
|
||||
}
|
||||
|
||||
static inline u_short
|
||||
inw(u_short port)
|
||||
{
|
||||
u_short data;
|
||||
|
||||
__asm __volatile("inw %1,%0" : "=a" (data) : "d" (port));
|
||||
return data;
|
||||
}
|
||||
|
||||
static inline u_long
|
||||
inl(u_short port)
|
||||
{
|
||||
u_long data;
|
||||
|
||||
__asm __volatile("inl %1,%0" : "=a" (data) : "d" (port));
|
||||
return data;
|
||||
}
|
||||
|
||||
static inline void
|
||||
outb(u_short port, u_char val)
|
||||
{
|
||||
__asm __volatile("outb %0,%1" : :"a" (val), "d" (port));
|
||||
}
|
||||
|
||||
static inline void
|
||||
outw(u_short port, u_short val)
|
||||
{
|
||||
__asm __volatile("outw %0,%1" : :"a" (val), "d" (port));
|
||||
}
|
||||
|
||||
static inline void
|
||||
outl(u_short port, u_long val)
|
||||
{
|
||||
__asm __volatile("outl %0,%1" : :"a" (val), "d" (port));
|
||||
}
|
||||
|
||||
static inline int bdb(void)
|
||||
{
|
||||
extern int bdb_exists;
|
||||
|
||||
if (!bdb_exists)
|
||||
return (0);
|
||||
__asm("int $3");
|
||||
__asm __volatile("int $3");
|
||||
return (1);
|
||||
}
|
||||
#endif /* BDE_DEBUGGER */
|
||||
|
||||
static inline void
|
||||
static __inline void
|
||||
disable_intr(void)
|
||||
{
|
||||
__asm __volatile("cli");
|
||||
}
|
||||
|
||||
static inline void
|
||||
static __inline void
|
||||
enable_intr(void)
|
||||
{
|
||||
__asm __volatile("sti");
|
||||
}
|
||||
|
||||
static inline u_long
|
||||
read_eflags()
|
||||
#define HAVE_INLINE_FFS
|
||||
|
||||
static __inline int
|
||||
ffs(int mask)
|
||||
{
|
||||
u_long ef;
|
||||
__asm __volatile("pushf; popl %0" : "=a" (ef));
|
||||
return(ef);
|
||||
int result;
|
||||
/*
|
||||
* bsfl turns out to be not all that slow on 486's. It can beaten
|
||||
* using a binary search to reduce to 4 bits and then a table lookup,
|
||||
* but only if the code is inlined and in the cache, and the code
|
||||
* is quite large so inlining it probably busts the cache.
|
||||
*
|
||||
* Note that gcc-2's builtin ffs would be used if we didn't declare
|
||||
* this inline or turn off the builtin. The builtin is faster but
|
||||
* broken in gcc-2.4.5 and slower but working in gcc-2.5 and 2.6.
|
||||
*/
|
||||
__asm __volatile("testl %0,%0; je 1f; bsfl %0,%0; incl %0; 1:"
|
||||
: "=r" (result) : "0" (mask));
|
||||
return (result);
|
||||
}
|
||||
|
||||
static inline void
|
||||
write_eflags(u_long ef)
|
||||
#if __GNUC__ < 2
|
||||
|
||||
#define inb(port) inbv(port)
|
||||
#define outb(port, data) outbv(port, data)
|
||||
|
||||
#else /* __GNUC >= 2 */
|
||||
|
||||
/*
|
||||
* Use an expression-statement instead of a conditional expression
|
||||
* because gcc-2.6.0 would promote the operands of the conditional
|
||||
* and produce poor code for "if ((inb(var) & const1) == const2)".
|
||||
*/
|
||||
#define inb(port) ({ \
|
||||
u_char _data; \
|
||||
if (__builtin_constant_p((int) (port)) && (port) < 256ul) \
|
||||
_data = inbc(port); \
|
||||
else \
|
||||
_data = inbv(port); \
|
||||
_data; })
|
||||
|
||||
#define outb(port, data) \
|
||||
(__builtin_constant_p((int) (port)) && (port) < 256ul \
|
||||
? outbc(port, data) : outbv(port, data))
|
||||
|
||||
static __inline u_char
|
||||
inbc(u_int port)
|
||||
{
|
||||
__asm __volatile("pushl %0; popf" : : "a" ((u_long) ef));
|
||||
u_char data;
|
||||
|
||||
__asm __volatile("inb %1,%0" : "=a" (data) : "i" (port));
|
||||
return (data);
|
||||
}
|
||||
|
||||
static inline void
|
||||
pmap_update()
|
||||
static __inline void
|
||||
outbc(u_int port, u_char data)
|
||||
{
|
||||
__asm __volatile("movl %%cr3, %%eax; movl %%eax, %%cr3" : : : "ax");
|
||||
__asm __volatile("outb %0,%1" : : "a" (data), "i" (port));
|
||||
}
|
||||
|
||||
static inline u_long
|
||||
rcr2()
|
||||
#endif /* __GNUC <= 2 */
|
||||
|
||||
static __inline u_char
|
||||
inbv(u_int port)
|
||||
{
|
||||
u_char data;
|
||||
/*
|
||||
* We use %%dx and not %1 here because i/o is done at %dx and not at
|
||||
* %edx, while gcc generates inferior code (movw instead of movl)
|
||||
* if we tell it to load (u_short) port.
|
||||
*/
|
||||
__asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
|
||||
return (data);
|
||||
}
|
||||
|
||||
static __inline u_long
|
||||
inl(u_int port)
|
||||
{
|
||||
u_long data;
|
||||
__asm __volatile("movl %%cr2,%%eax" : "=a" (data));
|
||||
return data;
|
||||
|
||||
__asm __volatile("inl %%dx,%0" : "=a" (data) : "d" (port));
|
||||
return (data);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
insb(u_int port, void *addr, size_t cnt)
|
||||
{
|
||||
__asm __volatile("cld; rep; insb"
|
||||
: : "d" (port), "D" (addr), "c" (cnt)
|
||||
: "di", "cx", "memory");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
insw(u_int port, void *addr, size_t cnt)
|
||||
{
|
||||
__asm __volatile("cld; rep; insw"
|
||||
: : "d" (port), "D" (addr), "c" (cnt)
|
||||
: "di", "cx", "memory");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
insl(u_int port, void *addr, size_t cnt)
|
||||
{
|
||||
__asm __volatile("cld; rep; insl"
|
||||
: : "d" (port), "D" (addr), "c" (cnt)
|
||||
: "di", "cx", "memory");
|
||||
}
|
||||
|
||||
static __inline u_short
|
||||
inw(u_int port)
|
||||
{
|
||||
u_short data;
|
||||
|
||||
__asm __volatile("inw %%dx,%0" : "=a" (data) : "d" (port));
|
||||
return (data);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outbv(u_int port, u_char data)
|
||||
{
|
||||
u_char al;
|
||||
/*
|
||||
* Use an unnecessary assignment to help gcc's register allocator.
|
||||
* This make a large difference for gcc-1.40 and a tiny difference
|
||||
* for gcc-2.6.0. For gcc-1.40, al had to be ``asm("ax")'' for
|
||||
* best results. gcc-2.6.0 can't handle this.
|
||||
*/
|
||||
al = data;
|
||||
__asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outl(u_int port, u_long data)
|
||||
{
|
||||
/*
|
||||
* outl() and outw() aren't used much so we haven't looked at
|
||||
* possible micro-optimizations such as the unnecessary
|
||||
* assignment for them.
|
||||
*/
|
||||
__asm __volatile("outl %0,%%dx" : : "a" (data), "d" (port));
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outsb(u_int port, void *addr, size_t cnt)
|
||||
{
|
||||
__asm __volatile("cld; rep; outsb"
|
||||
: : "d" (port), "S" (addr), "c" (cnt)
|
||||
: "di", "cx");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outsw(u_int port, void *addr, size_t cnt)
|
||||
{
|
||||
__asm __volatile("cld; rep; outsw"
|
||||
: : "d" (port), "S" (addr), "c" (cnt)
|
||||
: "di", "cx");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outsl(u_int port, void *addr, size_t cnt)
|
||||
{
|
||||
__asm __volatile("cld; rep; outsl"
|
||||
: : "d" (port), "S" (addr), "c" (cnt)
|
||||
: "di", "cx");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
outw(u_int port, u_short data)
|
||||
{
|
||||
__asm __volatile("outw %0,%%dx" : : "a" (data), "d" (port));
|
||||
}
|
||||
|
||||
static __inline void
|
||||
pmap_update(void)
|
||||
{
|
||||
u_long temp;
|
||||
/*
|
||||
* This should be implemented as load_cr3(rcr3()) when load_cr3()
|
||||
* is inlined.
|
||||
*/
|
||||
__asm __volatile("movl %%cr3, %0; movl %0, %%cr3" : "=r" (temp));
|
||||
}
|
||||
|
||||
static __inline u_long
|
||||
rcr2(void)
|
||||
{
|
||||
u_long data;
|
||||
|
||||
__asm __volatile("movl %%cr2,%0" : "=r" (data));
|
||||
return (data);
|
||||
}
|
||||
|
||||
static __inline u_long
|
||||
read_eflags(void)
|
||||
{
|
||||
u_long ef;
|
||||
|
||||
__asm __volatile("pushfl; popl %0" : "=r" (ef));
|
||||
return (ef);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
write_eflags(u_long ef)
|
||||
{
|
||||
__asm __volatile("pushl %0; popfl" : : "r" (ef));
|
||||
}
|
||||
|
||||
/*
|
||||
* XXX queue stuff belongs elsewhere.
|
||||
*/
|
||||
struct quehead {
|
||||
struct quehead *qh_link;
|
||||
struct quehead *qh_rlink;
|
||||
};
|
||||
|
||||
static inline void
|
||||
static __inline void
|
||||
insque(void *a, void *b)
|
||||
{
|
||||
register struct quehead *element = a, *head = b;
|
||||
struct quehead *element = a, *head = b;
|
||||
|
||||
element->qh_link = head->qh_link;
|
||||
head->qh_link = (struct quehead *)element;
|
||||
element->qh_rlink = (struct quehead *)head;
|
||||
((struct quehead *)(element->qh_link))->qh_rlink
|
||||
= (struct quehead *)element;
|
||||
head->qh_link = element;
|
||||
element->qh_rlink = head;
|
||||
element->qh_link->qh_rlink = element;
|
||||
}
|
||||
|
||||
static inline void
|
||||
static __inline void
|
||||
remque(void *a)
|
||||
{
|
||||
register struct quehead *element = a;
|
||||
((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
|
||||
((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
|
||||
struct quehead *element = a;
|
||||
|
||||
element->qh_link->qh_rlink = element->qh_rlink;
|
||||
element->qh_rlink->qh_link = element->qh_link;
|
||||
element->qh_rlink = 0;
|
||||
}
|
||||
|
||||
#else /* not __GNUC__ */
|
||||
extern void insque __P((void *, void *));
|
||||
extern void remque __P((void *));
|
||||
#else /* !__GNUC__ */
|
||||
|
||||
int bdb __P((void));
|
||||
void disable_intr __P((void));
|
||||
void enable_intr __P((void));
|
||||
u_char inb __P((u_int port));
|
||||
void outb __P((u_int port, u_int data)); /* XXX - incompat */
|
||||
u_long inl __P((u_int port));
|
||||
void insb __P((u_int port, void *addr, size_t cnt));
|
||||
void insl __P((u_int port, void *addr, size_t cnt));
|
||||
void insw __P((u_int port, void *addr, size_t cnt));
|
||||
u_short inw __P((u_int port));
|
||||
void outb __P((u_int port, u_char data));
|
||||
void outl __P((u_int port, u_long data));
|
||||
void outsb __P((u_int port, void *addr, size_t cnt));
|
||||
void outsl __P((u_int port, void *addr, size_t cnt));
|
||||
void outsw __P((u_int port, void *addr, size_t cnt));
|
||||
void outw __P((u_int port, u_short data));
|
||||
void void pmap_update __P((void));
|
||||
u_long read_eflags __P((void));
|
||||
u_long rcr2 __P((void));
|
||||
void write_eflags __P((u_long ef));
|
||||
|
||||
void insque __P((void *a, void *b));
|
||||
void remque __P((void *a))
|
||||
|
||||
#endif /* __GNUC__ */
|
||||
|
||||
void load_cr0 __P((u_int cr0));
|
||||
u_int rcr0 __P((void));
|
||||
void load_cr3(u_long);
|
||||
u_long rcr3(void);
|
||||
/*
|
||||
* XXX the following declarations document garbage in support.s.
|
||||
* gcc hasn't needed _divsi* for years.
|
||||
* bcopy[bwx]() was used by pccons but isn't used now.
|
||||
*/
|
||||
int __divsi3 __P((int factor1, int factor2));
|
||||
u_int __udivsi3 __P((u_int factor1, u_int factor2));
|
||||
void bcopyb __P((const void *from, void *to, size_t len));
|
||||
void bcopyw __P((const void *from, void *to, size_t len));
|
||||
void bcopyx __P((const void *from, void *to, size_t len,
|
||||
int stride));
|
||||
|
||||
void setidt __P((int, void (*)(), int, int));
|
||||
extern u_long kvtop(void *);
|
||||
extern void fillw(int /*u_short*/, void *, size_t);
|
||||
extern void filli(int, void *, size_t);
|
||||
#if 0
|
||||
/*
|
||||
* These functions in support.s are declared elsewhere.
|
||||
*/
|
||||
void bcopy __P((const void *from, void *to, size_t len));
|
||||
void blkclr __P((void *buf, size_t len));
|
||||
void bzero __P((void *buf, size_t len));
|
||||
int copyin __P((void *udaddr, void *kaddr, size_t len));
|
||||
int copyinstr __P((void *udaddr, void *kaddr, size_t len,
|
||||
size_t *lencopied));
|
||||
int copyout __P((void *kaddr, void *udaddr, size_t len));
|
||||
int copystr __P((void *kfaddr, void *kdaddr, size_t len,
|
||||
size_t *lencopied));
|
||||
int fubyte __P((void *base));
|
||||
int fuswintr __P((void *base));
|
||||
int fuibyte __P((void *base));
|
||||
int fuword __P((void *base));
|
||||
struct region_descriptor;
|
||||
void lgdt __P((struct region_descriptor *rdp));
|
||||
void lidt __P((struct region_descriptor *rdp));
|
||||
void lldt __P((u_short sel));
|
||||
/*
|
||||
* longjmp() and setjmp() are only used by ddb. They probably shouldn't
|
||||
* shouldn't be supported in the kernel.
|
||||
*/
|
||||
#include <setjmp.h>
|
||||
void longjmp __P((jmp_buf jb, int rv));
|
||||
void ovbcopy __P((const void *from, void *to, size_t len);
|
||||
int setjmp __P((jmp_buf jb));
|
||||
struct soft_segment_descriptor;
|
||||
union descriptor;
|
||||
int ssdtosd __P((struct soft_segment_descriptor *ssdp,
|
||||
union descriptor *sdp));
|
||||
int subyte __P((void *base, int byte));
|
||||
int suibyte __P((void *base, int byte));
|
||||
int suswintr __P((void *base, int word));
|
||||
int suword __P((void *base, int word));
|
||||
|
||||
#endif /* _MACHINE_CPUFUNC_H_ */
|
||||
/*
|
||||
* These functions in support.s are declared elsewhere, but never used.
|
||||
* A silly amount of effort went into copyoutstr(). It's not worth
|
||||
* maintaining, since the string length is usually known so copyout
|
||||
* works better, or is easy to find so copyout() can be used.
|
||||
*/
|
||||
int copyoutstr __P((void *kaddr, void *udaddr, size_t len,
|
||||
size_t *lencopied));
|
||||
int fuiword __P((void *base));
|
||||
int suiword __P((void *base, int word));
|
||||
|
||||
/*
|
||||
* These functions in support.s are also in libkern.a and are declared in
|
||||
* libkern.h.
|
||||
* ffs() is built in to gcc-2 and was buggy in gcc-2.4.5 so we may may the
|
||||
* buggy version if we don't replace it by an inline.
|
||||
*/
|
||||
int bcmp __P((const void *b1, const void *b2, size_t length));
|
||||
int ffs __P((int mask));
|
||||
#endif /* 0 */
|
||||
|
||||
/*
|
||||
* These variables and functions in support.s are used.
|
||||
*/
|
||||
extern u_int atdevbase; /* offset in virtual memory of ISA io mem */
|
||||
|
||||
void filli __P((int pat, void *base, size_t cnt));
|
||||
void fillw __P((int /*u_short*/ pat, void *base, size_t cnt));
|
||||
int fusword __P((void *base));
|
||||
void load_cr0 __P((u_long cr0));
|
||||
void load_cr3 __P((u_long cr3));
|
||||
void ltr __P((u_short sel));
|
||||
u_int rcr0 __P((void));
|
||||
u_long rcr3 __P((void));
|
||||
int rtcin __P((int val));
|
||||
int susword __P((void *base, int word));
|
||||
|
||||
/*
|
||||
* These functions are NOT in support.s and should be declared elsewhere.
|
||||
*/
|
||||
u_long kvtop __P((void *addr));
|
||||
typedef void alias_for_inthand_t __P((u_int cs, u_int ef, u_int esp,
|
||||
u_int ss));
|
||||
void setidt __P((int idx, alias_for_inthand_t *func, int typ,
|
||||
int dpl));
|
||||
|
||||
#endif /* !_MACHINE_CPUFUNC_H_ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user