usr/src/uts/sun4u/sys/cpudrv_mach.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_CPUDRV_MACH_H
  27 #define _SYS_CPUDRV_MACH_H
  28
  29 #include <sys/cpu_module.h>
  30 #include <sys/cpudrv.h>
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * We currently refuse to power manage if the CPU in not ready to
  38  * take cross calls (cross calls fail silently if CPU is not ready
  39  * for it).
  40  */
  41 #define CPUDRV_XCALL_IS_READY(cpuid) (CPU_XCALL_READY(cpuid))
  42
  43 /*
  44  * Currently, there is no governor on sun4u,
  45  */
  46 #define CPUDRV_RESET_GOVERNOR_THREAD(cpupm)
  47
  48 /*
  49  * Currently, there is no need for a handler on sun4u.
  50  */
  51 #define CPUDRV_INSTALL_MAX_CHANGE_HANDLER(cpuid)
  52
  53 /*
  54  * Topspeed is always the head speed.
  55  */
  56 #define CPUDRV_TOPSPEED(cpupm)  (cpupm)->head_spd
  57
  58 /*
  59  * There is no notion of changing topspeed on sun4u.
  60  */
  61 #define CPUDRV_REDEFINE_TOPSPEED(dip)
  62
  63 /*
  64  * There are no PPM callbacks for sun4u.
  65  */
  66 #define CPUDRV_SET_PPM_CALLBACKS()
  67
  68 /*
  69  * clock-divisors property tells the supported speeds
  70  * as divisors of the normal speed. Divisors are in increasing
  71  * order starting with 1 (for normal speed). For example, a
  72  * property value of "1, 2, 32" represents full, 1/2 and 1/32
  73  * speeds.
  74  */
  75 #define CPUDRV_GET_SPEEDS(cpudsp, speeds, nspeeds) { \
  76         if (ddi_prop_lookup_int_array(DDI_DEV_T_ANY, cpudsp->dip, \
  77             DDI_PROP_DONTPASS, "clock-divisors", &speeds, \
  78             &nspeeds) != DDI_PROP_SUCCESS) { \
  79                 nspeeds = 0; \
  80                 DPRINTF(D_PM_INIT, ("cpudrv_init: instance %d: " \
  81                     "clock-divisors property not defined\n", \
  82                     ddi_get_instance(cpudsp->dip))); \
  83         } \
  84 }
  85 #define CPUDRV_FREE_SPEEDS(speeds, nspeeds) { \
  86         if (nspeeds > 0) \
  87                 ddi_prop_free(speeds); \
  88 }
  89
  90 /*
  91  * Convert speed to Hz.
  92  */
  93 #define CPUDRV_SPEED_HZ(mhz, divisor) (((uint64_t)mhz * 1000000) / divisor)
  94
  95 /*
  96  * Compute the idle cnt percentage for a given speed.
  97  */
  98 #define CPUDRV_IDLE_CNT_PERCENT(hwm, speeds, i) \
  99         (100 - ((100 - hwm) * speeds[i]))
 100
 101 /*
 102  * Compute the user cnt percentage for a given speed.
 103  */
 104 #define CPUDRV_USER_CNT_PERCENT(hwm, speeds, i) \
 105         ((hwm * speeds[i - 1]) / speeds[i])
 106
 107 /*
 108  * pm-components property defintions for sun4u.
 109  *
 110  * Fully constructed pm-components property should be an array of
 111  * strings that look something like:
 112  *
 113  * pmc[0] = "NAME=CPU Speed"
 114  * pmc[1] = "1=1/32 of Normal"
 115  * pmc[2] = "2=1/2 of Normal"
 116  * pmc[3] = "3=Normal"
 117  *
 118  * The amount of memory needed for each string is:
 119  *      digits for power level + '=' + '1/' + digits for speed +
 120  *      description text + '\0'
 121  */
 122 #define CPUDRV_COMP_NORMAL "Normal"
 123 #define CPUDRV_COMP_OTHER " of Normal"
 124 #define CPUDRV_COMP_SIZE() \
 125         (CPUDRV_COMP_MAX_DIG + 1 + 2 + CPUDRV_COMP_MAX_DIG + \
 126             sizeof (CPUDRV_COMP_OTHER) + 1);
 127 #define CPUDRV_COMP_SPEED(cpupm, cur_spd) \
 128         ((cur_spd == cpupm->head_spd) ? cur_spd->pm_level : cur_spd->speed)
 129 #define CPUDRV_COMP_SPRINT(pmc, cpupm, cur_spd, comp_spd) { \
 130         if (cur_spd == cpupm->head_spd) \
 131                 (void) sprintf(pmc, "%d=%s", comp_spd, CPUDRV_COMP_NORMAL);\
 132         else \
 133                 (void) sprintf(pmc, "%d=1/%d%s", cur_spd->pm_level, \
 134                     comp_spd, CPUDRV_COMP_OTHER); \
 135 }
 136
 137 #ifdef  __cplusplus
 138 }
 139 #endif
 140
 141 #endif /* _SYS_CPUDRV_MACH_H */