xref: /titanic_52/usr/src/uts/sun4u/sys/cpudrv_mach.h (revision f6e214c7418f43af38bd8c3a557e3d0a1d311cfa)
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 */
142