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Annotation of sys/arch/i386/include/pctr.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: pctr.h,v 1.12 2003/05/27 23:52:01 fgsch 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 ("rdtsc" : "=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 ("rdpmc\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 ("rdmsr" : "=A" (v) : "c" (msr));           \
        !            79:   v;                                                           \
        !            80: })
        !            81:
        !            82: #define wrmsr(msr, v) \
        !            83:      __asm __volatile ("wrmsr" :: "A" ((u_quad_t) (v)), "c" (msr));
        !            84:
        !            85: #endif /* _KERNEL */
        !            86: #endif /* ! _I386_PCTR_H_ */