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 2008 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_PM_XCALL_IS_READY(cpuid) (CPU_XCALL_READY(cpuid))
  42
  43 /*
  44  * If a failure occurs during attach(), then CPU power management
  45  * is disabled.
  46  */
  47 extern boolean_t cpudrv_enabled;
  48
  49 #define CPUDRV_PM_DISABLE() (cpudrv_enabled = B_FALSE)
  50
  51 #define CPUDRV_PM_DISABLED() (!cpudrv_enabled)
  52
  53 #define CPUDRV_PM_POWER_ENABLED(cpudsp) cpudrv_pm_enabled()
  54
  55 /*
  56  * Currently, there is no governor on sun4u,
  57  */
  58 #define CPUDRV_PM_RESET_GOVERNOR_THREAD(cpupm)
  59
  60 /*
  61  * Currently, there is no need for a handler on sun4u.
  62  */
  63 #define CPUDRV_PM_INSTALL_MAX_CHANGE_HANDLER(cpudsp, dip)
  64
  65 /*
  66  * There is no notion of changing topspeed on sun4u.
  67  */
  68 #define CPUDRV_PM_REDEFINE_TOPSPEED(dip)
  69
  70 /*
  71  * There are no PPM callbacks for sun4u.
  72  */
  73 #define CPUDRV_PM_SET_PPM_CALLBACKS()
  74
  75 /*
  76  * clock-divisors property tells the supported speeds
  77  * as divisors of the normal speed. Divisors are in increasing
  78  * order starting with 1 (for normal speed). For example, a
  79  * property value of "1, 2, 32" represents full, 1/2 and 1/32
  80  * speeds.
  81  */
  82 #define CPUDRV_PM_GET_SPEEDS(cpudsp, speeds, nspeeds) { \
  83         if (ddi_prop_lookup_int_array(DDI_DEV_T_ANY, cpudsp->dip, \
  84             DDI_PROP_DONTPASS, "clock-divisors", &speeds, \
  85             &nspeeds) != DDI_PROP_SUCCESS) { \
  86                 DPRINTF(D_PM_INIT, ("cpudrv_pm_init: instance %d: " \
  87                     "clock-divisors property not defined\n", \
  88                                     ddi_get_instance(cpudsp->dip))); \
  89                 return (DDI_FAILURE); \
  90         } \
  91 }
  92 #define CPUDRV_PM_FREE_SPEEDS(speeds, unused) ddi_prop_free(speeds);
  93
  94 /*
  95  * Convert speed to Hz.
  96  */
  97 #define CPUDRV_PM_SPEED_HZ(mhz, divisor) (((uint64_t)mhz * 1000000) / divisor)
  98
  99 /*
 100  * Compute the idle cnt percentage for a given speed.
 101  */
 102 #define CPUDRV_PM_IDLE_CNT_PERCENT(hwm, speeds, i) \
 103         (100 - ((100 - hwm) * speeds[i]))
 104
 105 /*
 106  * Compute the user cnt percentage for a given speed.
 107  */
 108 #define CPUDRV_PM_USER_CNT_PERCENT(hwm, speeds, i) \
 109         ((hwm * speeds[i - 1]) / speeds[i])
 110
 111 /*
 112  * pm-components property defintions for sun4u.
 113  *
 114  * Fully constructed pm-components property should be an array of
 115  * strings that look something like:
 116  *
 117  * pmc[0] = "NAME=CPU Speed"
 118  * pmc[1] = "1=1/32 of Normal"
 119  * pmc[2] = "2=1/2 of Normal"
 120  * pmc[3] = "3=Normal"
 121  *
 122  * The amount of memory needed for each string is:
 123  *      digits for power level + '=' + '1/' + digits for speed +
 124  *      description text + '\0'
 125  */
 126 #define CPUDRV_PM_COMP_NORMAL "Normal"
 127 #define CPUDRV_PM_COMP_OTHER " of Normal"
 128 #define CPUDRV_PM_COMP_SIZE() \
 129         (CPUDRV_PM_COMP_MAX_DIG + 1 + 2 + CPUDRV_PM_COMP_MAX_DIG + \
 130             sizeof (CPUDRV_PM_COMP_OTHER) + 1);
 131 #define CPUDRV_PM_COMP_SPEED(cpupm, cur_spd) \
 132         ((cur_spd == cpupm->head_spd) ? cur_spd->pm_level : cur_spd->speed)
 133 #define CPUDRV_PM_COMP_SPRINT(pmc, cpupm, cur_spd, comp_spd) { \
 134         if (cur_spd == cpupm->head_spd) \
 135                 (void) sprintf(pmc, "%d=%s", comp_spd, CPUDRV_PM_COMP_NORMAL);\
 136         else \
 137                 (void) sprintf(pmc, "%d=1/%d%s", cur_spd->pm_level, \
 138                     comp_spd, CPUDRV_PM_COMP_OTHER); \
 139 }
 140
 141 extern boolean_t cpudrv_pm_enabled(void);
 142
 143 #ifdef  __cplusplus
 144 }
 145 #endif
 146
 147 #endif /* _SYS_CPUDRV_MACH_H */