xref: /freebsd-11.0-release/sys/contrib/octeon-sdk/cvmx-power-throttle.h

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/**
 * @file
 *
 * Interface to power-throttle control, measurement, and debugging
 * facilities.
 *
 * <hr>$Revision<hr>
 *
 */

#ifndef __CVMX_POWER_THROTTLE_H__
#define __CVMX_POWER_THROTTLE_H__
#ifdef	__cplusplus
extern "C" {
#endif

/**
 * a field of the POWTHROTTLE register
 */
static struct cvmx_power_throttle_rfield_t {
	char	name[16];	/* the field's name */
	int32_t	pos;		/* position of the field's LSb */
	int32_t	len;		/* the field's length */
} cvmx_power_throttle_rfield[] = {
#define CVMX_PTH_INDEX_MAXPOW	0
	{"MAXPOW",   56,  8},
#define CVMX_PTH_INDEX_POWER		1
	{"POWER" ,   48,  8},
#define CVMX_PTH_INDEX_THROTT	2
	{"THROTT",   40,  8},
#define CVMX_PTH_INDEX_RESERVED	3
	{"Reserved", 28, 12},
#define CVMX_PTH_INDEX_DISTAG	4
	{"DISTAG",   27,  1},
#define CVMX_PTH_INDEX_PERIOD	5
	{"PERIOD",   24,  3},
#define CVMX_PTH_INDEX_POWLIM	6
	{"POWLIM",   16,  8},
#define CVMX_PTH_INDEX_MAXTHR	7
	{"MAXTHR",    8,  8},
#define CVMX_PTH_INDEX_MINTHR	8
	{"MINTHR",    0,  8}
#define CVMX_PTH_INDEX_MAX		9
};

#define CVMX_PTH_GET_MASK(len, pos) \
	((((uint64_t)1 << (len)) - 1) << (pos))

/**
 * Get the i'th field of power-throttle register r.
 */
static inline uint64_t cvmx_power_throttle_get_field(int i, uint64_t r)
{
    if (OCTEON_IS_MODEL(OCTEON_CN6XXX))
    {
        uint64_t m;
        struct cvmx_power_throttle_rfield_t *p;

        assert((i >= 0) && (i < CVMX_PTH_INDEX_MAX));

        p = &cvmx_power_throttle_rfield[i];
        m = CVMX_PTH_GET_MASK(p->len, p->pos);

        return((r & m) >> p->pos);
    }
    return 0;
}

/**
 * Set the i'th field of power-throttle register r to v.
 */
static inline int cvmx_power_throttle_set_field(int i, uint64_t r, uint64_t v)
{
    if (OCTEON_IS_MODEL(OCTEON_CN6XXX))
    {
        uint64_t m;
        struct cvmx_power_throttle_rfield_t *p;

        assert((i >= 0) && (i < CVMX_PTH_INDEX_MAX));

        p = &cvmx_power_throttle_rfield[i];
        m = CVMX_PTH_GET_MASK(p->len, p->pos);

        return((~m & r) | ((v << p->pos) & m));
    }
    return 0;
}

/**
 * API Function Prototypes
 */
extern int cvmx_power_throttle_self(uint8_t percentage);
extern int cvmx_power_throttle(uint8_t percentage, uint64_t coremask);

#ifdef	__cplusplus
}
#endif
#endif /* __CVMX_POWER_THROTTLE_H__ */