1 /* $OpenBSD: pctr.h,v 1.11 2001/06/05 05:05:38 pvalchev Exp $ */ 2 3 /* 4 * Pentium performance counter driver for OpenBSD. 5 * Copyright 1996 David Mazieres <dm@lcs.mit.edu>. 6 * 7 * Modification and redistribution in source and binary forms is 8 * permitted provided that due credit is given to the author and the 9 * OpenBSD project by leaving this copyright notice intact. 10 */ 11 12 #ifndef _I386_PCTR_H_ 13 #define _I386_PCTR_H_ 14 15 #include <sys/ioccom.h> 16 17 typedef u_quad_t pctrval; 18 19 #define PCTR_NUM 2 20 21 struct pctrst { 22 u_int pctr_fn[PCTR_NUM]; /* Current settings of hardware counters */ 23 pctrval pctr_tsc; /* Free-running 64-bit cycle counter */ 24 pctrval pctr_hwc[PCTR_NUM]; /* Values of the hardware counters */ 25 pctrval pctr_idl; /* Iterations of the idle loop */ 26 }; 27 28 /* Bit values in fn fields and PIOCS ioctl's */ 29 #define P5CTR_K 0x40 /* Monitor kernel-level events */ 30 #define P5CTR_U 0x80 /* Monitor user-level events */ 31 #define P5CTR_C 0x100 /* count cycles rather than events */ 32 33 #define P6CTR_U 0x010000 /* Monitor user-level events */ 34 #define P6CTR_K 0x020000 /* Monitor kernel-level events */ 35 #define P6CTR_E 0x040000 /* Edge detect */ 36 #define P6CTR_EN 0x400000 /* Enable counters (counter 0 only) */ 37 #define P6CTR_I 0x800000 /* Invert counter mask */ 38 39 /* Unit Mask bits */ 40 #define P6CTR_UM_M 0x0800 /* Modified cache lines */ 41 #define P6CTR_UM_E 0x0400 /* Exclusive cache lines */ 42 #define P6CTR_UM_S 0x0200 /* Shared cache lines */ 43 #define P6CTR_UM_I 0x0100 /* Invalid cache lines */ 44 #define P6CTR_UM_MESI (P6CTR_UM_M|P6CTR_UM_E|P6CTR_UM_S|P6CTR_UM_I) 45 #define P6CTR_UM_A 0x2000 /* Any initiator (as opposed to self) */ 46 47 #define P6CTR_CM_SHIFT 24 /* Left shift for counter mask */ 48 49 /* ioctl to set which counter a device tracks. */ 50 #define PCIOCRD _IOR('c', 1, struct pctrst) /* Read counter value */ 51 #define PCIOCS0 _IOW('c', 8, unsigned int) /* Set counter 0 function */ 52 #define PCIOCS1 _IOW('c', 9, unsigned int) /* Set counter 1 function */ 53 54 #define _PATH_PCTR "/dev/pctr" 55 56 #define rdtsc() \ 57 ({ \ 58 pctrval v; \ 59 __asm __volatile (".byte 0xf, 0x31" : "=A" (v)); \ 60 v; \ 61 }) 62 63 /* Read the performance counters (Pentium Pro only) */ 64 #define rdpmc(ctr) \ 65 ({ \ 66 pctrval v; \ 67 __asm __volatile (".byte 0xf, 0x33\n" \ 68 "\tandl $0xff, %%edx" \ 69 : "=A" (v) : "c" (ctr)); \ 70 v; \ 71 }) 72 73 #ifdef _KERNEL 74 75 #define rdmsr(msr) \ 76 ({ \ 77 pctrval v; \ 78 __asm __volatile (".byte 0xf, 0x32" : "=A" (v) : "c" (msr)); \ 79 v; \ 80 }) 81 82 #define wrmsr(msr, v) \ 83 __asm __volatile (".byte 0xf, 0x30" :: "A" ((u_quad_t) (v)), "c" (msr)); 84 85 #endif /* _KERNEL */ 86 #endif /* ! _I386_PCTR_H_ */ 87