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));
105 __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));
131 __asm __volatile("sti");
136 cpu_monitor(const void *addr, u_long extensions, u_int hints)
139 __asm __volatile("monitor"
140 : : "a" (addr), "c" (extensions), "d" (hints));
144 cpu_mwait(u_long extensions, u_int hints)
147 __asm __volatile("mwait" : : "a" (hints), "c" (extensions));
154 __asm __volatile("mfence" : : : "memory");
159 #define HAVE_INLINE_FFS
165 * Note that gcc-2's builtin ffs would be used if we didn't declare
166 * this inline or turn off the builtin. The builtin is faster but
167 * broken in gcc-2.4.5 and slower but working in gcc-2.5 and later
170 return (mask == 0 ? mask : (int)bsfl((u_int)mask) + 1);
173 #define HAVE_INLINE_FLS
178 return (mask == 0 ? mask : (int)bsrl((u_int)mask) + 1);
186 __asm __volatile("hlt");
189 static __inline u_char
194 __asm __volatile("inb %w1, %0" : "=a" (data) : "Nd" (port));
198 static __inline u_int
203 __asm __volatile("inl %w1, %0" : "=a" (data) : "Nd" (port));
208 insb(u_int port, void *addr, size_t count)
210 __asm __volatile("cld; rep; insb"
211 : "+D" (addr), "+c" (count)
217 insw(u_int port, void *addr, size_t count)
219 __asm __volatile("cld; rep; insw"
220 : "+D" (addr), "+c" (count)
226 insl(u_int port, void *addr, size_t count)
228 __asm __volatile("cld; rep; insl"
229 : "+D" (addr), "+c" (count)
237 __asm __volatile("invd");
240 static __inline u_short
245 __asm __volatile("inw %w1, %0" : "=a" (data) : "Nd" (port));
250 outb(u_int port, u_char data)
252 __asm __volatile("outb %0, %w1" : : "a" (data), "Nd" (port));
256 outl(u_int port, u_int data)
258 __asm __volatile("outl %0, %w1" : : "a" (data), "Nd" (port));
262 outsb(u_int port, const void *addr, size_t count)
264 __asm __volatile("cld; rep; outsb"
265 : "+S" (addr), "+c" (count)
270 outsw(u_int port, const void *addr, size_t count)
272 __asm __volatile("cld; rep; outsw"
273 : "+S" (addr), "+c" (count)
278 outsl(u_int port, const void *addr, size_t count)
280 __asm __volatile("cld; rep; outsl"
281 : "+S" (addr), "+c" (count)
286 outw(u_int port, u_short data)
288 __asm __volatile("outw %0, %w1" : : "a" (data), "Nd" (port));
294 __asm __volatile("pause");
297 static __inline u_int
306 __asm __volatile("pushfl; popl %0" : "=r" (ef));
310 static __inline uint64_t
315 __asm __volatile("rdmsr" : "=A" (rv) : "c" (msr));
319 static __inline uint64_t
324 __asm __volatile("rdpmc" : "=A" (rv) : "c" (pmc));
328 static __inline uint64_t
333 __asm __volatile("rdtsc" : "=A" (rv));
337 static __inline uint32_t
342 __asm __volatile("rdtsc" : "=a" (rv) : : "edx");
349 __asm __volatile("wbinvd");
354 _write_eflags(u_int ef)
356 write_eflags(u_int ef)
359 __asm __volatile("pushl %0; popfl" : : "r" (ef));
363 wrmsr(u_int msr, uint64_t newval)
365 __asm __volatile("wrmsr" : : "A" (newval), "c" (msr));
372 __asm __volatile("movl %0,%%cr0" : : "r" (data));
375 static __inline u_int
380 __asm __volatile("movl %%cr0,%0" : "=r" (data));
384 static __inline u_int
392 __asm __volatile("movl %%cr2,%0" : "=r" (data));
402 __asm __volatile("movl %0,%%cr3" : : "r" (data) : "memory");
406 static __inline u_int
411 __asm __volatile("movl %%cr3,%0" : "=r" (data));
418 __asm __volatile("movl %0,%%cr4" : : "r" (data));
421 static __inline u_int
426 __asm __volatile("movl %%cr4,%0" : "=r" (data));
431 * Global TLB flush (except for thise for pages marked PG_G)
444 * TLB flush for an individual page (even if it has PG_G).
445 * Only works on 486+ CPUs (i386 does not have PG_G).
454 __asm __volatile("invlpg %0" : : "m" (*(char *)addr) : "memory");
458 static __inline u_short
462 __asm __volatile("movw %%fs,%0" : "=rm" (sel));
466 static __inline uint64_t
470 __asm __volatile("sgdt %0" : "=m" (gdtr));
474 static __inline u_short
478 __asm __volatile("movw %%gs,%0" : "=rm" (sel));
482 static __inline uint64_t
486 __asm __volatile("sidt %0" : "=m" (idtr));
490 static __inline u_short
494 __asm __volatile("sldt %0" : "=g" (ldtr));
498 static __inline u_short
502 __asm __volatile("movw %%ss,%0" : "=rm" (sel));
506 static __inline u_short
510 __asm __volatile("str %0" : "=g" (tr));
517 __asm __volatile("movw %0,%%fs" : : "rm" (sel));
523 __asm __volatile("movw %0,%%gs" : : "rm" (sel));
527 lidt(struct region_descriptor *addr)
529 __asm __volatile("lidt (%0)" : : "r" (addr));
535 __asm __volatile("lldt %0" : : "r" (sel));
541 __asm __volatile("ltr %0" : : "r" (sel));
544 static __inline u_int
548 __asm __volatile("movl %%dr0,%0" : "=r" (data));
555 __asm __volatile("movl %0,%%dr0" : : "r" (dr0));
558 static __inline u_int
562 __asm __volatile("movl %%dr1,%0" : "=r" (data));
569 __asm __volatile("movl %0,%%dr1" : : "r" (dr1));
572 static __inline u_int
576 __asm __volatile("movl %%dr2,%0" : "=r" (data));
583 __asm __volatile("movl %0,%%dr2" : : "r" (dr2));
586 static __inline u_int
590 __asm __volatile("movl %%dr3,%0" : "=r" (data));
597 __asm __volatile("movl %0,%%dr3" : : "r" (dr3));
600 static __inline u_int
604 __asm __volatile("movl %%dr4,%0" : "=r" (data));
611 __asm __volatile("movl %0,%%dr4" : : "r" (dr4));
614 static __inline u_int
618 __asm __volatile("movl %%dr5,%0" : "=r" (data));
625 __asm __volatile("movl %0,%%dr5" : : "r" (dr5));
628 static __inline u_int
632 __asm __volatile("movl %%dr6,%0" : "=r" (data));
639 __asm __volatile("movl %0,%%dr6" : : "r" (dr6));
642 static __inline u_int
646 __asm __volatile("movl %%dr7,%0" : "=r" (data));
653 __asm __volatile("movl %0,%%dr7" : : "r" (dr7));
656 static __inline u_char
657 read_cyrix_reg(u_char reg)
664 write_cyrix_reg(u_char reg, u_char data)
670 static __inline register_t
675 eflags = read_eflags();
681 intr_restore(register_t eflags)
683 write_eflags(eflags);
686 #else /* !(__GNUCLIKE_ASM && __CC_SUPPORTS___INLINE) */
688 int breakpoint(void);
689 u_int bsfl(u_int mask);
690 u_int bsrl(u_int mask);
691 void disable_intr(void);
692 void do_cpuid(u_int ax, u_int *p);
693 void enable_intr(void);
695 void ia32_pause(void);
696 u_char inb(u_int port);
697 u_int inl(u_int port);
698 void insb(u_int port, void *addr, size_t count);
699 void insl(u_int port, void *addr, size_t count);
700 void insw(u_int port, void *addr, size_t count);
701 register_t intr_disable(void);
702 void intr_restore(register_t ef);
704 void invlpg(u_int addr);
706 u_short inw(u_int port);
707 void lidt(struct region_descriptor *addr);
708 void lldt(u_short sel);
709 void load_cr0(u_int cr0);
710 void load_cr3(u_int cr3);
711 void load_cr4(u_int cr4);
712 void load_dr0(u_int dr0);
713 void load_dr1(u_int dr1);
714 void load_dr2(u_int dr2);
715 void load_dr3(u_int dr3);
716 void load_dr4(u_int dr4);
717 void load_dr5(u_int dr5);
718 void load_dr6(u_int dr6);
719 void load_dr7(u_int dr7);
720 void load_fs(u_short sel);
721 void load_gs(u_short sel);
722 void ltr(u_short sel);
723 void outb(u_int port, u_char data);
724 void outl(u_int port, u_int data);
725 void outsb(u_int port, const void *addr, size_t count);
726 void outsl(u_int port, const void *addr, size_t count);
727 void outsw(u_int port, const void *addr, size_t count);
728 void outw(u_int port, u_short data);
733 uint64_t rdmsr(u_int msr);
734 uint64_t rdpmc(u_int pmc);
743 uint64_t rdtsc(void);
744 u_char read_cyrix_reg(u_char reg);
745 u_int read_eflags(void);
753 void write_cyrix_reg(u_char reg, u_char data);
754 void write_eflags(u_int ef);
755 void wrmsr(u_int msr, uint64_t newval);
757 #endif /* __GNUCLIKE_ASM && __CC_SUPPORTS___INLINE */
759 void reset_dbregs(void);
762 int rdmsr_safe(u_int msr, uint64_t *val);
763 int wrmsr_safe(u_int msr, uint64_t newval);
766 #endif /* !_MACHINE_CPUFUNC_H_ */