0e72764232
32 bits. Some times compiler inserts unnecessary instructions to preserve unused upper 32 bits even when it is casted to a 32-bit value. It reduces such compiler mistakes where every cycle counts.
745 lines
14 KiB
C
745 lines
14 KiB
C
/*-
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* Copyright (c) 2003 Peter Wemm.
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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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* 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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* 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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#ifndef _SYS_CDEFS_H_
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#error this file needs sys/cdefs.h as a prerequisite
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#endif
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struct region_descriptor;
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#define readb(va) (*(volatile uint8_t *) (va))
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#define readw(va) (*(volatile uint16_t *) (va))
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#define readl(va) (*(volatile uint32_t *) (va))
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#define readq(va) (*(volatile uint64_t *) (va))
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#define writeb(va, d) (*(volatile uint8_t *) (va) = (d))
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#define writew(va, d) (*(volatile uint16_t *) (va) = (d))
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#define writel(va, d) (*(volatile uint32_t *) (va) = (d))
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#define writeq(va, d) (*(volatile uint64_t *) (va) = (d))
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#if defined(__GNUCLIKE_ASM) && defined(__CC_SUPPORTS___INLINE)
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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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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_long
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bsfq(u_long mask)
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{
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u_long result;
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__asm __volatile("bsfq %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 u_long
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bsrq(u_long mask)
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{
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u_long result;
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__asm __volatile("bsrq %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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clflush(u_long addr)
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{
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__asm __volatile("clflush %0" : : "m" (*(char *)addr));
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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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static __inline void
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do_cpuid(u_int ax, u_int *p)
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{
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__asm __volatile("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 void
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cpuid_count(u_int ax, u_int cx, u_int *p)
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{
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__asm __volatile("cpuid"
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: "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
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: "0" (ax), "c" (cx));
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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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#ifdef _KERNEL
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#define HAVE_INLINE_FFS
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#define ffs(x) __builtin_ffs(x)
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#define HAVE_INLINE_FFSL
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static __inline int
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ffsl(long mask)
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{
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return (mask == 0 ? mask : (int)bsfq((u_long)mask) + 1);
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}
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#define HAVE_INLINE_FLS
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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 : (int)bsrl((u_int)mask) + 1);
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}
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#define HAVE_INLINE_FLSL
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static __inline int
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flsl(long mask)
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{
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return (mask == 0 ? mask : (int)bsrq((u_long)mask) + 1);
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}
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#endif /* _KERNEL */
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static __inline void
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halt(void)
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{
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__asm __volatile("hlt");
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}
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static __inline u_char
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inb(u_int port)
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{
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u_char data;
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__asm __volatile("inb %w1, %0" : "=a" (data) : "Nd" (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 %w1, %0" : "=a" (data) : "Nd" (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 count)
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{
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__asm __volatile("cld; rep; insb"
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: "+D" (addr), "+c" (count)
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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 count)
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{
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__asm __volatile("cld; rep; insw"
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: "+D" (addr), "+c" (count)
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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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insl(u_int port, void *addr, size_t count)
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{
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__asm __volatile("cld; rep; insl"
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: "+D" (addr), "+c" (count)
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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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invd(void)
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{
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__asm __volatile("invd");
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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 %w1, %0" : "=a" (data) : "Nd" (port));
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return (data);
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}
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static __inline void
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outb(u_int port, u_char data)
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{
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__asm __volatile("outb %0, %w1" : : "a" (data), "Nd" (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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{
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__asm __volatile("outl %0, %w1" : : "a" (data), "Nd" (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 count)
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{
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__asm __volatile("cld; rep; outsb"
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: "+S" (addr), "+c" (count)
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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 count)
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{
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__asm __volatile("cld; rep; outsw"
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: "+S" (addr), "+c" (count)
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: "d" (port));
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}
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static __inline void
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outsl(u_int port, const void *addr, size_t count)
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{
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__asm __volatile("cld; rep; outsl"
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: "+S" (addr), "+c" (count)
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: "d" (port));
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}
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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, %w1" : : "a" (data), "Nd" (port));
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}
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static __inline void
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mfence(void)
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{
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__asm __volatile("mfence" : : : "memory");
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}
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static __inline void
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ia32_pause(void)
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{
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__asm __volatile("pause");
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}
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static __inline u_long
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read_rflags(void)
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{
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u_long rf;
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__asm __volatile("pushfq; popq %0" : "=r" (rf));
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return (rf);
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}
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static __inline uint64_t
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rdmsr(u_int msr)
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{
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uint32_t low, high;
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__asm __volatile("rdmsr" : "=a" (low), "=d" (high) : "c" (msr));
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return (low | ((uint64_t)high << 32));
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}
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static __inline uint64_t
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rdpmc(u_int pmc)
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{
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uint32_t low, high;
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__asm __volatile("rdpmc" : "=a" (low), "=d" (high) : "c" (pmc));
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return (low | ((uint64_t)high << 32));
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}
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static __inline uint64_t
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rdtsc(void)
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{
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uint32_t low, high;
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__asm __volatile("rdtsc" : "=a" (low), "=d" (high));
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return (low | ((uint64_t)high << 32));
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}
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static __inline uint32_t
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rdtsc32(void)
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{
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uint32_t rv;
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__asm __volatile("rdtsc" : "=a" (rv) : : "edx");
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return (rv);
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}
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static __inline void
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wbinvd(void)
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{
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__asm __volatile("wbinvd");
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}
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static __inline void
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write_rflags(u_long rf)
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{
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__asm __volatile("pushq %0; popfq" : : "r" (rf));
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}
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static __inline void
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wrmsr(u_int msr, uint64_t newval)
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{
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uint32_t low, high;
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low = newval;
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high = newval >> 32;
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__asm __volatile("wrmsr" : : "a" (low), "d" (high), "c" (msr));
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}
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static __inline void
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load_cr0(u_long data)
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{
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__asm __volatile("movq %0,%%cr0" : : "r" (data));
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}
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static __inline u_long
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rcr0(void)
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{
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u_long data;
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__asm __volatile("movq %%cr0,%0" : "=r" (data));
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return (data);
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}
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static __inline u_long
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rcr2(void)
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{
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u_long data;
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__asm __volatile("movq %%cr2,%0" : "=r" (data));
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return (data);
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}
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static __inline void
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load_cr3(u_long data)
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{
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__asm __volatile("movq %0,%%cr3" : : "r" (data) : "memory");
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}
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static __inline u_long
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rcr3(void)
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{
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u_long data;
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__asm __volatile("movq %%cr3,%0" : "=r" (data));
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return (data);
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}
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static __inline void
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load_cr4(u_long data)
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{
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__asm __volatile("movq %0,%%cr4" : : "r" (data));
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}
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static __inline u_long
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rcr4(void)
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{
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u_long data;
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__asm __volatile("movq %%cr4,%0" : "=r" (data));
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return (data);
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}
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/*
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* Global TLB flush (except for thise for pages marked PG_G)
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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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load_cr3(rcr3());
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}
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/*
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* TLB flush for an individual page (even if it has PG_G).
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* Only works on 486+ CPUs (i386 does not have PG_G).
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*/
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static __inline void
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invlpg(u_long 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 u_short
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rfs(void)
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{
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u_short sel;
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__asm __volatile("movw %%fs,%0" : "=rm" (sel));
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return (sel);
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}
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static __inline u_short
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rgs(void)
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{
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u_short sel;
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__asm __volatile("movw %%gs,%0" : "=rm" (sel));
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return (sel);
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}
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static __inline u_short
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rss(void)
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{
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u_short sel;
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__asm __volatile("movw %%ss,%0" : "=rm" (sel));
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return (sel);
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}
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static __inline void
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load_ds(u_short sel)
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{
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__asm __volatile("movw %0,%%ds" : : "rm" (sel));
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}
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static __inline void
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load_es(u_short sel)
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{
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__asm __volatile("movw %0,%%es" : : "rm" (sel));
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}
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static __inline void
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cpu_monitor(const void *addr, int extensions, int hints)
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{
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__asm __volatile("monitor;"
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: :"a" (addr), "c" (extensions), "d"(hints));
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}
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static __inline void
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cpu_mwait(int extensions, int hints)
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{
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__asm __volatile("mwait;" : :"a" (hints), "c" (extensions));
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}
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#ifdef _KERNEL
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/* This is defined in <machine/specialreg.h> but is too painful to get to */
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#ifndef MSR_FSBASE
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#define MSR_FSBASE 0xc0000100
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#endif
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static __inline void
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load_fs(u_short sel)
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{
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/* Preserve the fsbase value across the selector load */
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__asm __volatile("rdmsr; movw %0,%%fs; wrmsr"
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: : "rm" (sel), "c" (MSR_FSBASE) : "eax", "edx");
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}
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#ifndef MSR_GSBASE
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#define MSR_GSBASE 0xc0000101
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#endif
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static __inline void
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load_gs(u_short sel)
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{
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/*
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* Preserve the gsbase value across the selector load.
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* Note that we have to disable interrupts because the gsbase
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* being trashed happens to be the kernel gsbase at the time.
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*/
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__asm __volatile("pushfq; cli; rdmsr; movw %0,%%gs; wrmsr; popfq"
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: : "rm" (sel), "c" (MSR_GSBASE) : "eax", "edx");
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}
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#else
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/* Usable by userland */
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static __inline void
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load_fs(u_short sel)
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{
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__asm __volatile("movw %0,%%fs" : : "rm" (sel));
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}
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static __inline void
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load_gs(u_short sel)
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{
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__asm __volatile("movw %0,%%gs" : : "rm" (sel));
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}
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#endif
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static __inline void
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lidt(struct region_descriptor *addr)
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{
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__asm __volatile("lidt (%0)" : : "r" (addr));
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}
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static __inline void
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lldt(u_short sel)
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{
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__asm __volatile("lldt %0" : : "r" (sel));
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}
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static __inline void
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ltr(u_short sel)
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{
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__asm __volatile("ltr %0" : : "r" (sel));
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}
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static __inline uint64_t
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rdr0(void)
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{
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uint64_t data;
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__asm __volatile("movq %%dr0,%0" : "=r" (data));
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return (data);
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}
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static __inline void
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load_dr0(uint64_t dr0)
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{
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__asm __volatile("movq %0,%%dr0" : : "r" (dr0));
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}
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static __inline uint64_t
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rdr1(void)
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{
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uint64_t data;
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__asm __volatile("movq %%dr1,%0" : "=r" (data));
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return (data);
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}
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static __inline void
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load_dr1(uint64_t dr1)
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{
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__asm __volatile("movq %0,%%dr1" : : "r" (dr1));
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}
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static __inline uint64_t
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rdr2(void)
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|
{
|
|
uint64_t data;
|
|
__asm __volatile("movq %%dr2,%0" : "=r" (data));
|
|
return (data);
|
|
}
|
|
|
|
static __inline void
|
|
load_dr2(uint64_t dr2)
|
|
{
|
|
__asm __volatile("movq %0,%%dr2" : : "r" (dr2));
|
|
}
|
|
|
|
static __inline uint64_t
|
|
rdr3(void)
|
|
{
|
|
uint64_t data;
|
|
__asm __volatile("movq %%dr3,%0" : "=r" (data));
|
|
return (data);
|
|
}
|
|
|
|
static __inline void
|
|
load_dr3(uint64_t dr3)
|
|
{
|
|
__asm __volatile("movq %0,%%dr3" : : "r" (dr3));
|
|
}
|
|
|
|
static __inline uint64_t
|
|
rdr4(void)
|
|
{
|
|
uint64_t data;
|
|
__asm __volatile("movq %%dr4,%0" : "=r" (data));
|
|
return (data);
|
|
}
|
|
|
|
static __inline void
|
|
load_dr4(uint64_t dr4)
|
|
{
|
|
__asm __volatile("movq %0,%%dr4" : : "r" (dr4));
|
|
}
|
|
|
|
static __inline uint64_t
|
|
rdr5(void)
|
|
{
|
|
uint64_t data;
|
|
__asm __volatile("movq %%dr5,%0" : "=r" (data));
|
|
return (data);
|
|
}
|
|
|
|
static __inline void
|
|
load_dr5(uint64_t dr5)
|
|
{
|
|
__asm __volatile("movq %0,%%dr5" : : "r" (dr5));
|
|
}
|
|
|
|
static __inline uint64_t
|
|
rdr6(void)
|
|
{
|
|
uint64_t data;
|
|
__asm __volatile("movq %%dr6,%0" : "=r" (data));
|
|
return (data);
|
|
}
|
|
|
|
static __inline void
|
|
load_dr6(uint64_t dr6)
|
|
{
|
|
__asm __volatile("movq %0,%%dr6" : : "r" (dr6));
|
|
}
|
|
|
|
static __inline uint64_t
|
|
rdr7(void)
|
|
{
|
|
uint64_t data;
|
|
__asm __volatile("movq %%dr7,%0" : "=r" (data));
|
|
return (data);
|
|
}
|
|
|
|
static __inline void
|
|
load_dr7(uint64_t dr7)
|
|
{
|
|
__asm __volatile("movq %0,%%dr7" : : "r" (dr7));
|
|
}
|
|
|
|
static __inline register_t
|
|
intr_disable(void)
|
|
{
|
|
register_t rflags;
|
|
|
|
rflags = read_rflags();
|
|
disable_intr();
|
|
return (rflags);
|
|
}
|
|
|
|
static __inline void
|
|
intr_restore(register_t rflags)
|
|
{
|
|
write_rflags(rflags);
|
|
}
|
|
|
|
#else /* !(__GNUCLIKE_ASM && __CC_SUPPORTS___INLINE) */
|
|
|
|
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);
|
|
void halt(void);
|
|
void ia32_pause(void);
|
|
u_char inb(u_int port);
|
|
u_int inl(u_int port);
|
|
void insb(u_int port, void *addr, size_t count);
|
|
void insl(u_int port, void *addr, size_t count);
|
|
void insw(u_int port, void *addr, size_t count);
|
|
register_t intr_disable(void);
|
|
void intr_restore(register_t rf);
|
|
void invd(void);
|
|
void invlpg(u_int addr);
|
|
void invltlb(void);
|
|
u_short inw(u_int port);
|
|
void lidt(struct region_descriptor *addr);
|
|
void lldt(u_short sel);
|
|
void load_cr0(u_long cr0);
|
|
void load_cr3(u_long cr3);
|
|
void load_cr4(u_long cr4);
|
|
void load_dr0(uint64_t dr0);
|
|
void load_dr1(uint64_t dr1);
|
|
void load_dr2(uint64_t dr2);
|
|
void load_dr3(uint64_t dr3);
|
|
void load_dr4(uint64_t dr4);
|
|
void load_dr5(uint64_t dr5);
|
|
void load_dr6(uint64_t dr6);
|
|
void load_dr7(uint64_t dr7);
|
|
void load_fs(u_short sel);
|
|
void load_gs(u_short sel);
|
|
void ltr(u_short sel);
|
|
void outb(u_int port, u_char data);
|
|
void outl(u_int port, u_int data);
|
|
void outsb(u_int port, const void *addr, size_t count);
|
|
void outsl(u_int port, const void *addr, size_t count);
|
|
void outsw(u_int port, const void *addr, size_t count);
|
|
void outw(u_int port, u_short data);
|
|
u_long rcr0(void);
|
|
u_long rcr2(void);
|
|
u_long rcr3(void);
|
|
u_long rcr4(void);
|
|
uint64_t rdmsr(u_int msr);
|
|
uint64_t rdpmc(u_int pmc);
|
|
uint64_t rdr0(void);
|
|
uint64_t rdr1(void);
|
|
uint64_t rdr2(void);
|
|
uint64_t rdr3(void);
|
|
uint64_t rdr4(void);
|
|
uint64_t rdr5(void);
|
|
uint64_t rdr6(void);
|
|
uint64_t rdr7(void);
|
|
uint64_t rdtsc(void);
|
|
u_int read_rflags(void);
|
|
u_int rfs(void);
|
|
u_int rgs(void);
|
|
void wbinvd(void);
|
|
void write_rflags(u_int rf);
|
|
void wrmsr(u_int msr, uint64_t newval);
|
|
|
|
#endif /* __GNUCLIKE_ASM && __CC_SUPPORTS___INLINE */
|
|
|
|
void reset_dbregs(void);
|
|
|
|
#ifdef _KERNEL
|
|
int rdmsr_safe(u_int msr, uint64_t *val);
|
|
int wrmsr_safe(u_int msr, uint64_t newval);
|
|
#endif
|
|
|
|
#endif /* !_MACHINE_CPUFUNC_H_ */
|