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
46 extern void xen_cli(void);
47 extern void xen_sti(void);
48 extern u_int xen_rcr2(void);
49 extern void xen_load_cr3(u_int data);
50 extern void xen_tlb_flush(void);
51 extern void xen_invlpg(u_int addr);
52 extern void write_eflags(u_int eflags);
53 extern u_int read_eflags(void);
56 struct region_descriptor;
58 #define readb(va) (*(volatile uint8_t *) (va))
59 #define readw(va) (*(volatile uint16_t *) (va))
60 #define readl(va) (*(volatile uint32_t *) (va))
62 #define writeb(va, d) (*(volatile uint8_t *) (va) = (d))
63 #define writew(va, d) (*(volatile uint16_t *) (va) = (d))
64 #define writel(va, d) (*(volatile uint32_t *) (va) = (d))
66 #if defined(__GNUCLIKE_ASM) && defined(__CC_SUPPORTS___INLINE)
71 __asm __volatile("int $3");
79 __asm("bsfl %1,%0" : "=r" (result) : "rm" (mask) : "cc");
88 __asm("bsrl %1,%0" : "=r" (result) : "rm" (mask) : "cc");
96 __asm __volatile("clflush %0" : : "m" (*(char *)addr));
100 clflushopt(u_long addr)
103 __asm __volatile(".byte 0x66;clflush %0" : : "m" (*(char *)addr));
110 __asm __volatile("clts");
119 __asm __volatile("cli" : : : "memory");
124 do_cpuid(u_int ax, u_int *p)
126 __asm __volatile("cpuid"
127 : "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
132 cpuid_count(u_int ax, u_int cx, u_int *p)
134 __asm __volatile("cpuid"
135 : "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
136 : "0" (ax), "c" (cx));
145 __asm __volatile("sti");
150 cpu_monitor(const void *addr, u_long extensions, u_int hints)
153 __asm __volatile("monitor"
154 : : "a" (addr), "c" (extensions), "d" (hints));
158 cpu_mwait(u_long extensions, u_int hints)
161 __asm __volatile("mwait" : : "a" (hints), "c" (extensions));
168 __asm __volatile("lfence" : : : "memory");
175 __asm __volatile("mfence" : : : "memory");
180 #define HAVE_INLINE_FFS
186 * Note that gcc-2's builtin ffs would be used if we didn't declare
187 * this inline or turn off the builtin. The builtin is faster but
188 * broken in gcc-2.4.5 and slower but working in gcc-2.5 and later
191 return (mask == 0 ? mask : (int)bsfl((u_int)mask) + 1);
194 #define HAVE_INLINE_FFSL
199 return (ffs((int)mask));
202 #define HAVE_INLINE_FLS
207 return (mask == 0 ? mask : (int)bsrl((u_int)mask) + 1);
210 #define HAVE_INLINE_FLSL
215 return (fls((int)mask));
223 __asm __volatile("hlt");
226 static __inline u_char
231 __asm __volatile("inb %w1, %0" : "=a" (data) : "Nd" (port));
235 static __inline u_int
240 __asm __volatile("inl %w1, %0" : "=a" (data) : "Nd" (port));
245 insb(u_int port, void *addr, size_t count)
247 __asm __volatile("cld; rep; insb"
248 : "+D" (addr), "+c" (count)
254 insw(u_int port, void *addr, size_t count)
256 __asm __volatile("cld; rep; insw"
257 : "+D" (addr), "+c" (count)
263 insl(u_int port, void *addr, size_t count)
265 __asm __volatile("cld; rep; insl"
266 : "+D" (addr), "+c" (count)
274 __asm __volatile("invd");
277 static __inline u_short
282 __asm __volatile("inw %w1, %0" : "=a" (data) : "Nd" (port));
287 outb(u_int port, u_char data)
289 __asm __volatile("outb %0, %w1" : : "a" (data), "Nd" (port));
293 outl(u_int port, u_int data)
295 __asm __volatile("outl %0, %w1" : : "a" (data), "Nd" (port));
299 outsb(u_int port, const void *addr, size_t count)
301 __asm __volatile("cld; rep; outsb"
302 : "+S" (addr), "+c" (count)
307 outsw(u_int port, const void *addr, size_t count)
309 __asm __volatile("cld; rep; outsw"
310 : "+S" (addr), "+c" (count)
315 outsl(u_int port, const void *addr, size_t count)
317 __asm __volatile("cld; rep; outsl"
318 : "+S" (addr), "+c" (count)
323 outw(u_int port, u_short data)
325 __asm __volatile("outw %0, %w1" : : "a" (data), "Nd" (port));
331 __asm __volatile("pause");
334 static __inline u_int
343 __asm __volatile("pushfl; popl %0" : "=r" (ef));
347 static __inline uint64_t
352 __asm __volatile("rdmsr" : "=A" (rv) : "c" (msr));
356 static __inline uint64_t
361 __asm __volatile("rdpmc" : "=A" (rv) : "c" (pmc));
365 static __inline uint64_t
370 __asm __volatile("rdtsc" : "=A" (rv));
374 static __inline uint32_t
379 __asm __volatile("rdtsc" : "=a" (rv) : : "edx");
386 __asm __volatile("wbinvd");
391 _write_eflags(u_int ef)
393 write_eflags(u_int ef)
396 __asm __volatile("pushl %0; popfl" : : "r" (ef));
400 wrmsr(u_int msr, uint64_t newval)
402 __asm __volatile("wrmsr" : : "A" (newval), "c" (msr));
409 __asm __volatile("movl %0,%%cr0" : : "r" (data));
412 static __inline u_int
417 __asm __volatile("movl %%cr0,%0" : "=r" (data));
421 static __inline u_int
429 __asm __volatile("movl %%cr2,%0" : "=r" (data));
439 __asm __volatile("movl %0,%%cr3" : : "r" (data) : "memory");
443 static __inline u_int
448 __asm __volatile("movl %%cr3,%0" : "=r" (data));
455 __asm __volatile("movl %0,%%cr4" : : "r" (data));
458 static __inline u_int
463 __asm __volatile("movl %%cr4,%0" : "=r" (data));
467 static __inline uint64_t
472 __asm __volatile("xgetbv" : "=a" (low), "=d" (high) : "c" (reg));
473 return (low | ((uint64_t)high << 32));
477 load_xcr(u_int reg, uint64_t val)
483 __asm __volatile("xsetbv" : : "c" (reg), "a" (low), "d" (high));
487 * Global TLB flush (except for thise for pages marked PG_G)
500 * TLB flush for an individual page (even if it has PG_G).
501 * Only works on 486+ CPUs (i386 does not have PG_G).
510 __asm __volatile("invlpg %0" : : "m" (*(char *)addr) : "memory");
514 static __inline u_short
518 __asm __volatile("movw %%fs,%0" : "=rm" (sel));
522 static __inline uint64_t
526 __asm __volatile("sgdt %0" : "=m" (gdtr));
530 static __inline u_short
534 __asm __volatile("movw %%gs,%0" : "=rm" (sel));
538 static __inline uint64_t
542 __asm __volatile("sidt %0" : "=m" (idtr));
546 static __inline u_short
550 __asm __volatile("sldt %0" : "=g" (ldtr));
554 static __inline u_short
558 __asm __volatile("movw %%ss,%0" : "=rm" (sel));
562 static __inline u_short
566 __asm __volatile("str %0" : "=g" (tr));
573 __asm __volatile("movw %0,%%fs" : : "rm" (sel));
579 __asm __volatile("movw %0,%%gs" : : "rm" (sel));
583 lidt(struct region_descriptor *addr)
585 __asm __volatile("lidt (%0)" : : "r" (addr));
591 __asm __volatile("lldt %0" : : "r" (sel));
597 __asm __volatile("ltr %0" : : "r" (sel));
600 static __inline u_int
604 __asm __volatile("movl %%dr0,%0" : "=r" (data));
611 __asm __volatile("movl %0,%%dr0" : : "r" (dr0));
614 static __inline u_int
618 __asm __volatile("movl %%dr1,%0" : "=r" (data));
625 __asm __volatile("movl %0,%%dr1" : : "r" (dr1));
628 static __inline u_int
632 __asm __volatile("movl %%dr2,%0" : "=r" (data));
639 __asm __volatile("movl %0,%%dr2" : : "r" (dr2));
642 static __inline u_int
646 __asm __volatile("movl %%dr3,%0" : "=r" (data));
653 __asm __volatile("movl %0,%%dr3" : : "r" (dr3));
656 static __inline u_int
660 __asm __volatile("movl %%dr4,%0" : "=r" (data));
667 __asm __volatile("movl %0,%%dr4" : : "r" (dr4));
670 static __inline u_int
674 __asm __volatile("movl %%dr5,%0" : "=r" (data));
681 __asm __volatile("movl %0,%%dr5" : : "r" (dr5));
684 static __inline u_int
688 __asm __volatile("movl %%dr6,%0" : "=r" (data));
695 __asm __volatile("movl %0,%%dr6" : : "r" (dr6));
698 static __inline u_int
702 __asm __volatile("movl %%dr7,%0" : "=r" (data));
709 __asm __volatile("movl %0,%%dr7" : : "r" (dr7));
712 static __inline u_char
713 read_cyrix_reg(u_char reg)
720 write_cyrix_reg(u_char reg, u_char data)
726 static __inline register_t
731 eflags = read_eflags();
737 intr_restore(register_t eflags)
739 write_eflags(eflags);
742 #else /* !(__GNUCLIKE_ASM && __CC_SUPPORTS___INLINE) */
744 int breakpoint(void);
745 u_int bsfl(u_int mask);
746 u_int bsrl(u_int mask);
747 void clflush(u_long addr);
749 void cpuid_count(u_int ax, u_int cx, u_int *p);
750 void disable_intr(void);
751 void do_cpuid(u_int ax, u_int *p);
752 void enable_intr(void);
754 void ia32_pause(void);
755 u_char inb(u_int port);
756 u_int inl(u_int port);
757 void insb(u_int port, void *addr, size_t count);
758 void insl(u_int port, void *addr, size_t count);
759 void insw(u_int port, void *addr, size_t count);
760 register_t intr_disable(void);
761 void intr_restore(register_t ef);
763 void invlpg(u_int addr);
765 u_short inw(u_int port);
766 void lidt(struct region_descriptor *addr);
767 void lldt(u_short sel);
768 void load_cr0(u_int cr0);
769 void load_cr3(u_int cr3);
770 void load_cr4(u_int cr4);
771 void load_dr0(u_int dr0);
772 void load_dr1(u_int dr1);
773 void load_dr2(u_int dr2);
774 void load_dr3(u_int dr3);
775 void load_dr4(u_int dr4);
776 void load_dr5(u_int dr5);
777 void load_dr6(u_int dr6);
778 void load_dr7(u_int dr7);
779 void load_fs(u_short sel);
780 void load_gs(u_short sel);
781 void ltr(u_short sel);
782 void outb(u_int port, u_char data);
783 void outl(u_int port, u_int data);
784 void outsb(u_int port, const void *addr, size_t count);
785 void outsl(u_int port, const void *addr, size_t count);
786 void outsw(u_int port, const void *addr, size_t count);
787 void outw(u_int port, u_short data);
792 uint64_t rdmsr(u_int msr);
793 uint64_t rdpmc(u_int pmc);
802 uint64_t rdtsc(void);
803 u_char read_cyrix_reg(u_char reg);
804 u_int read_eflags(void);
812 void write_cyrix_reg(u_char reg, u_char data);
813 void write_eflags(u_int ef);
814 void wrmsr(u_int msr, uint64_t newval);
816 #endif /* __GNUCLIKE_ASM && __CC_SUPPORTS___INLINE */
818 void reset_dbregs(void);
821 int rdmsr_safe(u_int msr, uint64_t *val);
822 int wrmsr_safe(u_int msr, uint64_t newval);
825 #endif /* !_MACHINE_CPUFUNC_H_ */