2 * Copyright (c) 1993 The Regents of the University of California.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * Functions to provide access to special i386 instructions.
34 * This in included in sys/systm.h, and that file should be
35 * used in preference to this.
38 #ifndef _MACHINE_CPUFUNC_H_
39 #define _MACHINE_CPUFUNC_H_
42 #error this file needs sys/cdefs.h as a prerequisite
45 struct region_descriptor;
47 #define readb(va) (*(volatile uint8_t *) (va))
48 #define readw(va) (*(volatile uint16_t *) (va))
49 #define readl(va) (*(volatile uint32_t *) (va))
51 #define writeb(va, d) (*(volatile uint8_t *) (va) = (d))
52 #define writew(va, d) (*(volatile uint16_t *) (va) = (d))
53 #define writel(va, d) (*(volatile uint32_t *) (va) = (d))
55 #if defined(__GNUCLIKE_ASM) && defined(__CC_SUPPORTS___INLINE)
60 __asm __volatile("int $3");
68 __asm("bsfl %1,%0" : "=r" (result) : "rm" (mask) : "cc");
77 __asm("bsrl %1,%0" : "=r" (result) : "rm" (mask) : "cc");
85 __asm __volatile("clflush %0" : : "m" (*(char *)addr));
89 clflushopt(u_long addr)
92 __asm __volatile(".byte 0x66;clflush %0" : : "m" (*(char *)addr));
99 __asm __volatile("clts");
106 __asm __volatile("cli" : : : "memory");
110 do_cpuid(u_int ax, u_int *p)
112 __asm __volatile("cpuid"
113 : "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
118 cpuid_count(u_int ax, u_int cx, u_int *p)
120 __asm __volatile("cpuid"
121 : "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
122 : "0" (ax), "c" (cx));
129 __asm __volatile("sti");
133 cpu_monitor(const void *addr, u_long extensions, u_int hints)
136 __asm __volatile("monitor"
137 : : "a" (addr), "c" (extensions), "d" (hints));
141 cpu_mwait(u_long extensions, u_int hints)
144 __asm __volatile("mwait" : : "a" (hints), "c" (extensions));
151 __asm __volatile("lfence" : : : "memory");
158 __asm __volatile("mfence" : : : "memory");
163 #define HAVE_INLINE_FFS
169 * Note that gcc-2's builtin ffs would be used if we didn't declare
170 * this inline or turn off the builtin. The builtin is faster but
171 * broken in gcc-2.4.5 and slower but working in gcc-2.5 and later
174 return (mask == 0 ? mask : (int)bsfl((u_int)mask) + 1);
177 #define HAVE_INLINE_FFSL
182 return (ffs((int)mask));
185 #define HAVE_INLINE_FLS
190 return (mask == 0 ? mask : (int)bsrl((u_int)mask) + 1);
193 #define HAVE_INLINE_FLSL
198 return (fls((int)mask));
206 __asm __volatile("hlt");
209 static __inline u_char
214 __asm __volatile("inb %w1, %0" : "=a" (data) : "Nd" (port));
218 static __inline u_int
223 __asm __volatile("inl %w1, %0" : "=a" (data) : "Nd" (port));
228 insb(u_int port, void *addr, size_t count)
230 __asm __volatile("cld; rep; insb"
231 : "+D" (addr), "+c" (count)
237 insw(u_int port, void *addr, size_t count)
239 __asm __volatile("cld; rep; insw"
240 : "+D" (addr), "+c" (count)
246 insl(u_int port, void *addr, size_t count)
248 __asm __volatile("cld; rep; insl"
249 : "+D" (addr), "+c" (count)
257 __asm __volatile("invd");
260 static __inline u_short
265 __asm __volatile("inw %w1, %0" : "=a" (data) : "Nd" (port));
270 outb(u_int port, u_char data)
272 __asm __volatile("outb %0, %w1" : : "a" (data), "Nd" (port));
276 outl(u_int port, u_int data)
278 __asm __volatile("outl %0, %w1" : : "a" (data), "Nd" (port));
282 outsb(u_int port, const void *addr, size_t count)
284 __asm __volatile("cld; rep; outsb"
285 : "+S" (addr), "+c" (count)
290 outsw(u_int port, const void *addr, size_t count)
292 __asm __volatile("cld; rep; outsw"
293 : "+S" (addr), "+c" (count)
298 outsl(u_int port, const void *addr, size_t count)
300 __asm __volatile("cld; rep; outsl"
301 : "+S" (addr), "+c" (count)
306 outw(u_int port, u_short data)
308 __asm __volatile("outw %0, %w1" : : "a" (data), "Nd" (port));
314 __asm __volatile("pause");
317 static __inline u_int
322 __asm __volatile("pushfl; popl %0" : "=r" (ef));
326 static __inline uint64_t
331 __asm __volatile("rdmsr" : "=A" (rv) : "c" (msr));
335 static __inline uint32_t
340 __asm __volatile("rdmsr" : "=a" (low) : "c" (msr) : "edx");
344 static __inline uint64_t
349 __asm __volatile("rdpmc" : "=A" (rv) : "c" (pmc));
353 static __inline uint64_t
358 __asm __volatile("rdtsc" : "=A" (rv));
362 static __inline uint32_t
367 __asm __volatile("rdtsc" : "=a" (rv) : : "edx");
374 __asm __volatile("wbinvd");
378 write_eflags(u_int ef)
380 __asm __volatile("pushl %0; popfl" : : "r" (ef));
384 wrmsr(u_int msr, uint64_t newval)
386 __asm __volatile("wrmsr" : : "A" (newval), "c" (msr));
393 __asm __volatile("movl %0,%%cr0" : : "r" (data));
396 static __inline u_int
401 __asm __volatile("movl %%cr0,%0" : "=r" (data));
405 static __inline u_int
410 __asm __volatile("movl %%cr2,%0" : "=r" (data));
418 __asm __volatile("movl %0,%%cr3" : : "r" (data) : "memory");
421 static __inline u_int
426 __asm __volatile("movl %%cr3,%0" : "=r" (data));
433 __asm __volatile("movl %0,%%cr4" : : "r" (data));
436 static __inline u_int
441 __asm __volatile("movl %%cr4,%0" : "=r" (data));
445 static __inline uint64_t
450 __asm __volatile("xgetbv" : "=a" (low), "=d" (high) : "c" (reg));
451 return (low | ((uint64_t)high << 32));
455 load_xcr(u_int reg, uint64_t val)
461 __asm __volatile("xsetbv" : : "c" (reg), "a" (low), "d" (high));
465 * Global TLB flush (except for thise for pages marked PG_G)
475 * TLB flush for an individual page (even if it has PG_G).
476 * Only works on 486+ CPUs (i386 does not have PG_G).
482 __asm __volatile("invlpg %0" : : "m" (*(char *)addr) : "memory");
485 static __inline u_short
489 __asm __volatile("movw %%fs,%0" : "=rm" (sel));
493 static __inline uint64_t
497 __asm __volatile("sgdt %0" : "=m" (gdtr));
501 static __inline u_short
505 __asm __volatile("movw %%gs,%0" : "=rm" (sel));
509 static __inline uint64_t
513 __asm __volatile("sidt %0" : "=m" (idtr));
517 static __inline u_short
521 __asm __volatile("sldt %0" : "=g" (ldtr));
525 static __inline u_short
529 __asm __volatile("movw %%ss,%0" : "=rm" (sel));
533 static __inline u_short
537 __asm __volatile("str %0" : "=g" (tr));
544 __asm __volatile("movw %0,%%fs" : : "rm" (sel));
550 __asm __volatile("movw %0,%%gs" : : "rm" (sel));
554 lidt(struct region_descriptor *addr)
556 __asm __volatile("lidt (%0)" : : "r" (addr));
562 __asm __volatile("lldt %0" : : "r" (sel));
568 __asm __volatile("ltr %0" : : "r" (sel));
571 static __inline u_int
575 __asm __volatile("movl %%dr0,%0" : "=r" (data));
582 __asm __volatile("movl %0,%%dr0" : : "r" (dr0));
585 static __inline u_int
589 __asm __volatile("movl %%dr1,%0" : "=r" (data));
596 __asm __volatile("movl %0,%%dr1" : : "r" (dr1));
599 static __inline u_int
603 __asm __volatile("movl %%dr2,%0" : "=r" (data));
610 __asm __volatile("movl %0,%%dr2" : : "r" (dr2));
613 static __inline u_int
617 __asm __volatile("movl %%dr3,%0" : "=r" (data));
624 __asm __volatile("movl %0,%%dr3" : : "r" (dr3));
627 static __inline u_int
631 __asm __volatile("movl %%dr4,%0" : "=r" (data));
638 __asm __volatile("movl %0,%%dr4" : : "r" (dr4));
641 static __inline u_int
645 __asm __volatile("movl %%dr5,%0" : "=r" (data));
652 __asm __volatile("movl %0,%%dr5" : : "r" (dr5));
655 static __inline u_int
659 __asm __volatile("movl %%dr6,%0" : "=r" (data));
666 __asm __volatile("movl %0,%%dr6" : : "r" (dr6));
669 static __inline u_int
673 __asm __volatile("movl %%dr7,%0" : "=r" (data));
680 __asm __volatile("movl %0,%%dr7" : : "r" (dr7));
683 static __inline u_char
684 read_cyrix_reg(u_char reg)
691 write_cyrix_reg(u_char reg, u_char data)
697 static __inline register_t
702 eflags = read_eflags();
708 intr_restore(register_t eflags)
710 write_eflags(eflags);
713 #else /* !(__GNUCLIKE_ASM && __CC_SUPPORTS___INLINE) */
715 int breakpoint(void);
716 u_int bsfl(u_int mask);
717 u_int bsrl(u_int mask);
718 void clflush(u_long addr);
720 void cpuid_count(u_int ax, u_int cx, u_int *p);
721 void disable_intr(void);
722 void do_cpuid(u_int ax, u_int *p);
723 void enable_intr(void);
725 void ia32_pause(void);
726 u_char inb(u_int port);
727 u_int inl(u_int port);
728 void insb(u_int port, void *addr, size_t count);
729 void insl(u_int port, void *addr, size_t count);
730 void insw(u_int port, void *addr, size_t count);
731 register_t intr_disable(void);
732 void intr_restore(register_t ef);
734 void invlpg(u_int addr);
736 u_short inw(u_int port);
737 void lidt(struct region_descriptor *addr);
738 void lldt(u_short sel);
739 void load_cr0(u_int cr0);
740 void load_cr3(u_int cr3);
741 void load_cr4(u_int cr4);
742 void load_dr0(u_int dr0);
743 void load_dr1(u_int dr1);
744 void load_dr2(u_int dr2);
745 void load_dr3(u_int dr3);
746 void load_dr4(u_int dr4);
747 void load_dr5(u_int dr5);
748 void load_dr6(u_int dr6);
749 void load_dr7(u_int dr7);
750 void load_fs(u_short sel);
751 void load_gs(u_short sel);
752 void ltr(u_short sel);
753 void outb(u_int port, u_char data);
754 void outl(u_int port, u_int data);
755 void outsb(u_int port, const void *addr, size_t count);
756 void outsl(u_int port, const void *addr, size_t count);
757 void outsw(u_int port, const void *addr, size_t count);
758 void outw(u_int port, u_short data);
763 uint64_t rdmsr(u_int msr);
764 uint64_t rdpmc(u_int pmc);
773 uint64_t rdtsc(void);
774 u_char read_cyrix_reg(u_char reg);
775 u_int read_eflags(void);
783 void write_cyrix_reg(u_char reg, u_char data);
784 void write_eflags(u_int ef);
785 void wrmsr(u_int msr, uint64_t newval);
787 #endif /* __GNUCLIKE_ASM && __CC_SUPPORTS___INLINE */
789 void reset_dbregs(void);
792 int rdmsr_safe(u_int msr, uint64_t *val);
793 int wrmsr_safe(u_int msr, uint64_t newval);
796 #endif /* !_MACHINE_CPUFUNC_H_ */