freebsd-dev/sys/amd64/include/cpufunc.h
Peter Wemm d1693e1701 Back out all the pmap related stuff I've touched over the last few days.
There is some unresolved badness that has been eluding me, particularly
affecting uniprocessor kernels.  Turning off PG_G helped (which is a bad
sign) but didn't solve it entirely.  Userland programs still crashed.
2002-02-27 09:51:33 +00:00

630 lines
13 KiB
C

/*-
* Copyright (c) 1993 The Regents of the University of California.
* 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 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.
*
* $FreeBSD$
*/
/*
* Functions to provide access to special i386 instructions.
*/
#ifndef _MACHINE_CPUFUNC_H_
#define _MACHINE_CPUFUNC_H_
#include <sys/cdefs.h>
#include <machine/psl.h>
__BEGIN_DECLS
#define readb(va) (*(volatile u_int8_t *) (va))
#define readw(va) (*(volatile u_int16_t *) (va))
#define readl(va) (*(volatile u_int32_t *) (va))
#define writeb(va, d) (*(volatile u_int8_t *) (va) = (d))
#define writew(va, d) (*(volatile u_int16_t *) (va) = (d))
#define writel(va, d) (*(volatile u_int32_t *) (va) = (d))
#define CRITICAL_FORK (read_eflags() | PSL_I)
#ifdef __GNUC__
#ifdef SWTCH_OPTIM_STATS
extern int tlb_flush_count; /* XXX */
#endif
static __inline void
breakpoint(void)
{
__asm __volatile("int $3");
}
static __inline u_int
bsfl(u_int mask)
{
u_int result;
__asm __volatile("bsfl %1,%0" : "=r" (result) : "rm" (mask));
return (result);
}
static __inline u_int
bsrl(u_int mask)
{
u_int result;
__asm __volatile("bsrl %1,%0" : "=r" (result) : "rm" (mask));
return (result);
}
static __inline void
disable_intr(void)
{
__asm __volatile("cli" : : : "memory");
}
static __inline void
enable_intr(void)
{
__asm __volatile("sti");
}
#define HAVE_INLINE_FFS
static __inline int
ffs(int mask)
{
/*
* 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 later
* versions.
*/
return (mask == 0 ? mask : bsfl((u_int)mask) + 1);
}
#define HAVE_INLINE_FLS
static __inline int
fls(int mask)
{
return (mask == 0 ? mask : bsrl((u_int)mask) + 1);
}
#if __GNUC__ < 2
#define inb(port) inbv(port)
#define outb(port, data) outbv(port, data)
#else /* __GNUC >= 2 */
/*
* The following complications are to get around gcc not having a
* constraint letter for the range 0..255. We still put "d" in the
* constraint because "i" isn't a valid constraint when the port
* isn't constant. This only matters for -O0 because otherwise
* the non-working version gets optimized away.
*
* 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)".
*
* The unnecessary test `(port) < 0x10000' is to generate a warning if
* the `port' has type u_short or smaller. Such types are pessimal.
* This actually only works for signed types. The range check is
* careful to avoid generating warnings.
*/
#define inb(port) __extension__ ({ \
u_char _data; \
if (__builtin_constant_p(port) && ((port) & 0xffff) < 0x100 \
&& (port) < 0x10000) \
_data = inbc(port); \
else \
_data = inbv(port); \
_data; })
#define outb(port, data) ( \
__builtin_constant_p(port) && ((port) & 0xffff) < 0x100 \
&& (port) < 0x10000 \
? outbc(port, data) : outbv(port, data))
static __inline u_char
inbc(u_int port)
{
u_char data;
__asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port)));
return (data);
}
static __inline void
outbc(u_int port, u_char data)
{
__asm __volatile("outb %0,%1" : : "a" (data), "id" ((u_short)(port)));
}
#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_int
inl(u_int port)
{
u_int 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" (addr), "+c" (cnt)
: "d" (port)
: "memory");
}
static __inline void
insw(u_int port, void *addr, size_t cnt)
{
__asm __volatile("cld; rep; insw"
: "+D" (addr), "+c" (cnt)
: "d" (port)
: "memory");
}
static __inline void
insl(u_int port, void *addr, size_t cnt)
{
__asm __volatile("cld; rep; insl"
: "+D" (addr), "+c" (cnt)
: "d" (port)
: "memory");
}
static __inline void
invd(void)
{
__asm __volatile("invd");
}
#if defined(SMP) && defined(_KERNEL)
/*
* When using APIC IPI's, invlpg() is not simply the invlpg instruction
* (this is a bug) and the inlining cost is prohibitive since the call
* executes into the IPI transmission system.
*/
void invlpg __P((u_int addr));
void invltlb __P((void));
static __inline void
cpu_invlpg(void *addr)
{
__asm __volatile("invlpg %0" : : "m" (*(char *)addr) : "memory");
}
static __inline void
cpu_invltlb(void)
{
u_int temp;
/*
* This should be implemented as load_cr3(rcr3()) when load_cr3()
* is inlined.
*/
__asm __volatile("movl %%cr3, %0; movl %0, %%cr3" : "=r" (temp)
: : "memory");
#if defined(SWTCH_OPTIM_STATS)
++tlb_flush_count;
#endif
}
#else /* !(SMP && _KERNEL) */
static __inline void
invlpg(u_int addr)
{
__asm __volatile("invlpg %0" : : "m" (*(char *)addr) : "memory");
}
static __inline void
invltlb(void)
{
u_int temp;
/*
* This should be implemented as load_cr3(rcr3()) when load_cr3()
* is inlined.
*/
__asm __volatile("movl %%cr3, %0; movl %0, %%cr3" : "=r" (temp)
: : "memory");
#ifdef SWTCH_OPTIM_STATS
++tlb_flush_count;
#endif
}
#endif /* SMP && _KERNEL */
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_int 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, const void *addr, size_t cnt)
{
__asm __volatile("cld; rep; outsb"
: "+S" (addr), "+c" (cnt)
: "d" (port));
}
static __inline void
outsw(u_int port, const void *addr, size_t cnt)
{
__asm __volatile("cld; rep; outsw"
: "+S" (addr), "+c" (cnt)
: "d" (port));
}
static __inline void
outsl(u_int port, const void *addr, size_t cnt)
{
__asm __volatile("cld; rep; outsl"
: "+S" (addr), "+c" (cnt)
: "d" (port));
}
static __inline void
outw(u_int port, u_short data)
{
__asm __volatile("outw %0,%%dx" : : "a" (data), "d" (port));
}
static __inline u_int
rcr2(void)
{
u_int data;
__asm __volatile("movl %%cr2,%0" : "=r" (data));
return (data);
}
static __inline u_int
read_eflags(void)
{
u_int ef;
__asm __volatile("pushfl; popl %0" : "=r" (ef));
return (ef);
}
static __inline void
do_cpuid(u_int ax, u_int *p)
{
__asm __volatile(
"cpuid"
: "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
: "0" (ax)
);
}
static __inline u_int64_t
rdmsr(u_int msr)
{
u_int64_t rv;
__asm __volatile("rdmsr" : "=A" (rv) : "c" (msr));
return (rv);
}
static __inline u_int64_t
rdpmc(u_int pmc)
{
u_int64_t rv;
__asm __volatile("rdpmc" : "=A" (rv) : "c" (pmc));
return (rv);
}
static __inline u_int64_t
rdtsc(void)
{
u_int64_t rv;
__asm __volatile("rdtsc" : "=A" (rv));
return (rv);
}
static __inline void
wbinvd(void)
{
__asm __volatile("wbinvd");
}
static __inline void
write_eflags(u_int ef)
{
__asm __volatile("pushl %0; popfl" : : "r" (ef));
}
static __inline void
wrmsr(u_int msr, u_int64_t newval)
{
__asm __volatile("wrmsr" : : "A" (newval), "c" (msr));
}
static __inline u_int
rfs(void)
{
u_int sel;
__asm __volatile("movl %%fs,%0" : "=rm" (sel));
return (sel);
}
static __inline u_int
rgs(void)
{
u_int sel;
__asm __volatile("movl %%gs,%0" : "=rm" (sel));
return (sel);
}
static __inline void
load_fs(u_int sel)
{
__asm __volatile("movl %0,%%fs" : : "rm" (sel));
}
static __inline void
load_gs(u_int sel)
{
__asm __volatile("movl %0,%%gs" : : "rm" (sel));
}
static __inline u_int
rdr0(void)
{
u_int data;
__asm __volatile("movl %%dr0,%0" : "=r" (data));
return (data);
}
static __inline void
load_dr0(u_int sel)
{
__asm __volatile("movl %0,%%dr0" : : "r" (sel));
}
static __inline u_int
rdr1(void)
{
u_int data;
__asm __volatile("movl %%dr1,%0" : "=r" (data));
return (data);
}
static __inline void
load_dr1(u_int sel)
{
__asm __volatile("movl %0,%%dr1" : : "r" (sel));
}
static __inline u_int
rdr2(void)
{
u_int data;
__asm __volatile("movl %%dr2,%0" : "=r" (data));
return (data);
}
static __inline void
load_dr2(u_int sel)
{
__asm __volatile("movl %0,%%dr2" : : "r" (sel));
}
static __inline u_int
rdr3(void)
{
u_int data;
__asm __volatile("movl %%dr3,%0" : "=r" (data));
return (data);
}
static __inline void
load_dr3(u_int sel)
{
__asm __volatile("movl %0,%%dr3" : : "r" (sel));
}
static __inline u_int
rdr4(void)
{
u_int data;
__asm __volatile("movl %%dr4,%0" : "=r" (data));
return (data);
}
static __inline void
load_dr4(u_int sel)
{
__asm __volatile("movl %0,%%dr4" : : "r" (sel));
}
static __inline u_int
rdr5(void)
{
u_int data;
__asm __volatile("movl %%dr5,%0" : "=r" (data));
return (data);
}
static __inline void
load_dr5(u_int sel)
{
__asm __volatile("movl %0,%%dr5" : : "r" (sel));
}
static __inline u_int
rdr6(void)
{
u_int data;
__asm __volatile("movl %%dr6,%0" : "=r" (data));
return (data);
}
static __inline void
load_dr6(u_int sel)
{
__asm __volatile("movl %0,%%dr6" : : "r" (sel));
}
static __inline u_int
rdr7(void)
{
u_int data;
__asm __volatile("movl %%dr7,%0" : "=r" (data));
return (data);
}
static __inline void
load_dr7(u_int sel)
{
__asm __volatile("movl %0,%%dr7" : : "r" (sel));
}
static __inline critical_t
cpu_critical_enter(void)
{
critical_t eflags;
eflags = read_eflags();
disable_intr();
return (eflags);
}
static __inline void
cpu_critical_exit(critical_t eflags)
{
write_eflags(eflags);
}
#else /* !__GNUC__ */
int breakpoint __P((void));
u_int bsfl __P((u_int mask));
u_int bsrl __P((u_int mask));
void disable_intr __P((void));
void do_cpuid __P((u_int ax, u_int *p));
void enable_intr __P((void));
u_char inb __P((u_int port));
u_int 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));
void invd __P((void));
void invlpg __P((u_int addr));
void invltlb __P((void));
u_short inw __P((u_int port));
void outb __P((u_int port, u_char data));
void outl __P((u_int port, u_int 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));
u_int rcr2 __P((void));
u_int64_t rdmsr __P((u_int msr));
u_int64_t rdpmc __P((u_int pmc));
u_int64_t rdtsc __P((void));
u_int read_eflags __P((void));
void wbinvd __P((void));
void write_eflags __P((u_int ef));
void wrmsr __P((u_int msr, u_int64_t newval));
u_int rfs __P((void));
u_int rgs __P((void));
void load_fs __P((u_int sel));
void load_gs __P((u_int sel));
critical_t cpu_critical_enter __P((void));
void cpu_critical_exit __P((critical_t eflags));
#endif /* __GNUC__ */
void load_cr0 __P((u_int cr0));
void load_cr3 __P((u_int cr3));
void load_cr4 __P((u_int cr4));
void ltr __P((u_short sel));
u_int rcr0 __P((void));
u_int rcr3 __P((void));
u_int rcr4 __P((void));
void reset_dbregs __P((void));
__END_DECLS
#endif /* !_MACHINE_CPUFUNC_H_ */