182da8209d
and cpu_critical_exit() and moves associated critical prototypes into their own header file, <arch>/<arch>/critical.h, which is only included by the three MI source files that need it. Backout and re-apply improperly comitted syntactical cleanups made to files that were still under active development. Backout improperly comitted program structure changes that moved localized declarations to the top of two procedures. Partially re-apply one of the program structure changes to move 'mask' into an intermediate block rather then in three separate sub-blocks to make the code more readable. Re-integrate bug fixes that Jake made to the sparc64 code. Note: In general, developers should not gratuitously move declarations out of sub-blocks. They are where they are for reasons of structure, grouping, readability, compiler-localizability, and to avoid developer-introduced bugs similar to several found in recent years in the VFS and VM code. Reviewed by: jake
631 lines
13 KiB
C
631 lines
13 KiB
C
/*-
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* Copyright (c) 1993 The Regents of the University of California.
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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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* 3. All advertising materials mentioning features or use of this software
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|
* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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|
|
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/*
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* Functions to provide access to special i386 instructions.
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* This in included in sys/systm.h, and that file should be
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* used in preference to this.
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*/
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#ifndef _MACHINE_CPUFUNC_H_
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#define _MACHINE_CPUFUNC_H_
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#include <sys/cdefs.h>
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#include <machine/psl.h>
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struct thread;
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|
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__BEGIN_DECLS
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#define readb(va) (*(volatile u_int8_t *) (va))
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#define readw(va) (*(volatile u_int16_t *) (va))
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#define readl(va) (*(volatile u_int32_t *) (va))
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|
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#define writeb(va, d) (*(volatile u_int8_t *) (va) = (d))
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#define writew(va, d) (*(volatile u_int16_t *) (va) = (d))
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#define writel(va, d) (*(volatile u_int32_t *) (va) = (d))
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|
|
|
#ifdef __GNUC__
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|
|
|
#ifdef SWTCH_OPTIM_STATS
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|
extern int tlb_flush_count; /* XXX */
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|
#endif
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|
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|
static __inline void
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|
breakpoint(void)
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{
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__asm __volatile("int $3");
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}
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|
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static __inline u_int
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bsfl(u_int mask)
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{
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u_int result;
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__asm __volatile("bsfl %1,%0" : "=r" (result) : "rm" (mask));
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return (result);
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}
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static __inline u_int
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bsrl(u_int mask)
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{
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u_int result;
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__asm __volatile("bsrl %1,%0" : "=r" (result) : "rm" (mask));
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return (result);
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}
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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" : : : "memory");
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}
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|
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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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|
|
|
#define HAVE_INLINE_FFS
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|
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|
static __inline int
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|
ffs(int mask)
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|
{
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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 later
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* versions.
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|
*/
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return (mask == 0 ? mask : bsfl((u_int)mask) + 1);
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}
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|
|
|
#define HAVE_INLINE_FLS
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|
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|
static __inline int
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|
fls(int mask)
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|
{
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return (mask == 0 ? mask : bsrl((u_int)mask) + 1);
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|
}
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|
|
|
#if __GNUC__ < 2
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|
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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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/*
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* The following complications are to get around gcc not having a
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* constraint letter for the range 0..255. We still put "d" in the
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* constraint because "i" isn't a valid constraint when the port
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* isn't constant. This only matters for -O0 because otherwise
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* the non-working version gets optimized away.
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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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* The unnecessary test `(port) < 0x10000' is to generate a warning if
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|
* the `port' has type u_short or smaller. Such types are pessimal.
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|
* This actually only works for signed types. The range check is
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* careful to avoid generating warnings.
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|
*/
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#define inb(port) __extension__ ({ \
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u_char _data; \
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if (__builtin_constant_p(port) && ((port) & 0xffff) < 0x100 \
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&& (port) < 0x10000) \
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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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|
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|
#define outb(port, data) ( \
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__builtin_constant_p(port) && ((port) & 0xffff) < 0x100 \
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&& (port) < 0x10000 \
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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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|
u_char data;
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__asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port)));
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return (data);
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}
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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("outb %0,%1" : : "a" (data), "id" ((u_short)(port)));
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}
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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_int
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|
inl(u_int port)
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|
{
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|
u_int 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" (addr), "+c" (cnt)
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: "d" (port)
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: "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" (addr), "+c" (cnt)
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: "d" (port)
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: "memory");
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}
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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" (addr), "+c" (cnt)
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: "d" (port)
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: "memory");
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|
}
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|
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|
static __inline void
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|
invd(void)
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|
{
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|
__asm __volatile("invd");
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|
}
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|
|
#if defined(SMP) && defined(_KERNEL)
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|
/*
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|
* When using APIC IPI's, invlpg() is not simply the invlpg instruction
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|
* (this is a bug) and the inlining cost is prohibitive since the call
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|
* executes into the IPI transmission system.
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|
*/
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|
void invlpg(u_int addr);
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|
void invltlb(void);
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static __inline void
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|
cpu_invlpg(void *addr)
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|
{
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|
__asm __volatile("invlpg %0" : : "m" (*(char *)addr) : "memory");
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}
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|
static __inline void
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|
cpu_invltlb(void)
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|
{
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|
u_int temp;
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|
/*
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|
* This should be implemented as load_cr3(rcr3()) when load_cr3()
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* is inlined.
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|
*/
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__asm __volatile("movl %%cr3, %0; movl %0, %%cr3" : "=r" (temp)
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: : "memory");
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#if defined(SWTCH_OPTIM_STATS)
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|
++tlb_flush_count;
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|
#endif
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|
}
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|
|
|
#else /* !(SMP && _KERNEL) */
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|
static __inline void
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|
invlpg(u_int addr)
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|
{
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__asm __volatile("invlpg %0" : : "m" (*(char *)addr) : "memory");
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}
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|
|
static __inline void
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|
invltlb(void)
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|
{
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|
u_int temp;
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/*
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|
* This should be implemented as load_cr3(rcr3()) when load_cr3()
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* is inlined.
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*/
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__asm __volatile("movl %%cr3, %0; movl %0, %%cr3" : "=r" (temp)
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: : "memory");
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#ifdef SWTCH_OPTIM_STATS
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|
++tlb_flush_count;
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|
#endif
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|
}
|
|
|
|
#endif /* SMP && _KERNEL */
|
|
|
|
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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|
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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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|
* 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
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* 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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|
|
static __inline void
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|
outl(u_int port, u_int data)
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|
{
|
|
/*
|
|
* outl() and outw() aren't used much so we haven't looked at
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|
* possible micro-optimizations such as the unnecessary
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|
* assignment for them.
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|
*/
|
|
__asm __volatile("outl %0,%%dx" : : "a" (data), "d" (port));
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|
}
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|
|
static __inline void
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|
outsb(u_int port, const void *addr, size_t cnt)
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|
{
|
|
__asm __volatile("cld; rep; outsb"
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|
: "+S" (addr), "+c" (cnt)
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: "d" (port));
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|
}
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|
|
static __inline void
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|
outsw(u_int port, const void *addr, size_t cnt)
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|
{
|
|
__asm __volatile("cld; rep; outsw"
|
|
: "+S" (addr), "+c" (cnt)
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|
: "d" (port));
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|
}
|
|
|
|
static __inline void
|
|
outsl(u_int port, const void *addr, size_t cnt)
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|
{
|
|
__asm __volatile("cld; rep; outsl"
|
|
: "+S" (addr), "+c" (cnt)
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|
: "d" (port));
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|
}
|
|
|
|
static __inline void
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|
outw(u_int port, u_short data)
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|
{
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|
__asm __volatile("outw %0,%%dx" : : "a" (data), "d" (port));
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|
}
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|
|
|
static __inline u_int
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|
rcr2(void)
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|
{
|
|
u_int data;
|
|
|
|
__asm __volatile("movl %%cr2,%0" : "=r" (data));
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|
return (data);
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|
}
|
|
|
|
static __inline u_int
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|
read_eflags(void)
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|
{
|
|
u_int ef;
|
|
|
|
__asm __volatile("pushfl; popl %0" : "=r" (ef));
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|
return (ef);
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|
}
|
|
|
|
static __inline void
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|
do_cpuid(u_int ax, u_int *p)
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|
{
|
|
__asm __volatile(
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|
"cpuid"
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|
: "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
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|
: "0" (ax)
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|
);
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|
}
|
|
|
|
static __inline u_int64_t
|
|
rdmsr(u_int msr)
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|
{
|
|
u_int64_t rv;
|
|
|
|
__asm __volatile("rdmsr" : "=A" (rv) : "c" (msr));
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|
return (rv);
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|
}
|
|
|
|
static __inline u_int64_t
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|
rdpmc(u_int pmc)
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|
{
|
|
u_int64_t rv;
|
|
|
|
__asm __volatile("rdpmc" : "=A" (rv) : "c" (pmc));
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|
return (rv);
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|
}
|
|
|
|
static __inline u_int64_t
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|
rdtsc(void)
|
|
{
|
|
u_int64_t rv;
|
|
|
|
__asm __volatile("rdtsc" : "=A" (rv));
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|
return (rv);
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|
}
|
|
|
|
static __inline void
|
|
wbinvd(void)
|
|
{
|
|
__asm __volatile("wbinvd");
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|
}
|
|
|
|
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 register_t
|
|
intr_disable(void)
|
|
{
|
|
register_t eflags;
|
|
|
|
eflags = read_eflags();
|
|
disable_intr();
|
|
return (eflags);
|
|
}
|
|
|
|
static __inline void
|
|
intr_restore(register_t eflags)
|
|
{
|
|
write_eflags(eflags);
|
|
}
|
|
|
|
#else /* !__GNUC__ */
|
|
|
|
int breakpoint(void);
|
|
u_int bsfl(u_int mask);
|
|
u_int bsrl(u_int mask);
|
|
void disable_intr(void);
|
|
void do_cpuid(u_int ax, u_int *p);
|
|
void enable_intr(void);
|
|
u_char inb(u_int port);
|
|
u_int inl(u_int port);
|
|
void insb(u_int port, void *addr, size_t cnt);
|
|
void insl(u_int port, void *addr, size_t cnt);
|
|
void insw(u_int port, void *addr, size_t cnt);
|
|
void invd(void);
|
|
void invlpg(u_int addr);
|
|
void invltlb(void);
|
|
u_short inw(u_int port);
|
|
void outb(u_int port, u_char data);
|
|
void outl(u_int port, u_int data);
|
|
void outsb(u_int port, void *addr, size_t cnt);
|
|
void outsl(u_int port, void *addr, size_t cnt);
|
|
void outsw(u_int port, void *addr, size_t cnt);
|
|
void outw(u_int port, u_short data);
|
|
u_int rcr2(void);
|
|
u_int64_t rdmsr(u_int msr);
|
|
u_int64_t rdpmc(u_int pmc);
|
|
u_int64_t rdtsc(void);
|
|
u_int read_eflags(void);
|
|
void wbinvd(void);
|
|
void write_eflags(u_int ef);
|
|
void wrmsr(u_int msr, u_int64_t newval);
|
|
u_int rfs(void);
|
|
u_int rgs(void);
|
|
void load_fs(u_int sel);
|
|
void load_gs(u_int sel);
|
|
|
|
#endif /* __GNUC__ */
|
|
|
|
void load_cr0(u_int cr0);
|
|
void load_cr3(u_int cr3);
|
|
void load_cr4(u_int cr4);
|
|
void ltr(u_short sel);
|
|
u_int rcr0(void);
|
|
u_int rcr3(void);
|
|
u_int rcr4(void);
|
|
void reset_dbregs(void);
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* !_MACHINE_CPUFUNC_H_ */
|