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 /* 27 * CPU power management driver support for sun4u. 28 */ 29 #include <sys/ddi.h> 30 #include <sys/sunddi.h> 31 #include <sys/cpudrv_mach.h> 32 #include <sys/machsystm.h> 33 34 boolean_t cpudrv_enabled = B_TRUE; 35 36 /* 37 * Change CPU speed. 38 */ 39 int 40 cpudrv_pm_change_speed(cpudrv_devstate_t *cpudsp, cpudrv_pm_spd_t *new_spd) 41 { 42 xc_one(cpudsp->cpu_id, (xcfunc_t *)cpu_change_speed, \ 43 (uint64_t)new_spd->speed, 0); 44 return (DDI_SUCCESS); 45 } 46 47 /* 48 * Determine the cpu_id for the CPU device. 49 */ 50 boolean_t 51 cpudrv_pm_get_cpu_id(dev_info_t *dip, processorid_t *cpu_id) 52 { 53 return (dip_to_cpu_id(dip, cpu_id) == DDI_SUCCESS); 54 } 55 56 /* 57 * A noop for this machine type. 58 */ 59 boolean_t 60 cpudrv_pm_power_ready(void) 61 { 62 return (B_TRUE); 63 } 64 65 /* 66 * A noop for this machine type. 67 */ 68 /* ARGSUSED */ 69 boolean_t 70 cpudrv_pm_is_governor_thread(cpudrv_pm_t *cpupm) 71 { 72 return (B_FALSE); 73 } 74 75 /* 76 * A noop for this machine type. 77 */ 78 /*ARGSUSED*/ 79 boolean_t 80 cpudrv_mach_pm_init(cpudrv_devstate_t *cpudsp) 81 { 82 return (B_TRUE); 83 } 84 85 /* 86 * A noop for this machine type. 87 */ 88 /*ARGSUSED*/ 89 void 90 cpudrv_mach_pm_free(cpudrv_devstate_t *cpudsp) 91 { 92 } 93 94 /* 95 * On SPARC all instances support power management unless attach fails. 96 * In the case of attach failure, cpupm_enabled will be false. 97 */ 98 boolean_t 99 cpudrv_pm_enabled() 100 { 101 return (B_TRUE); 102 } 103