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 /* 27 * CPU power management driver support for sun4u. 28 */ 29 #include <sys/ddi.h> 30 #include <sys/sunddi.h> 31 #include <sys/cpupm.h> 32 #include <sys/cpudrv_mach.h> 33 #include <sys/machsystm.h> 34 35 /* 36 * Change CPU speed. 37 */ 38 int 39 cpudrv_change_speed(cpudrv_devstate_t *cpudsp, cpudrv_pm_spd_t *new_spd) 40 { 41 xc_one(cpudsp->cpu_id, (xcfunc_t *)cpu_change_speed, \ 42 (uint64_t)new_spd->speed, 0); 43 return (DDI_SUCCESS); 44 } 45 46 /* 47 * Determine the cpu_id for the CPU device. 48 */ 49 boolean_t 50 cpudrv_get_cpu_id(dev_info_t *dip, processorid_t *cpu_id) 51 { 52 return (dip_to_cpu_id(dip, cpu_id) == DDI_SUCCESS); 53 } 54 55 /* 56 * A noop for this machine type. 57 */ 58 boolean_t 59 cpudrv_power_ready(void) 60 { 61 return (B_TRUE); 62 } 63 64 /* 65 * A noop for this machine type. 66 */ 67 /* ARGSUSED */ 68 boolean_t 69 cpudrv_is_governor_thread(cpudrv_pm_t *cpupm) 70 { 71 return (B_FALSE); 72 } 73 74 /* 75 * A noop for this machine type. 76 */ 77 /*ARGSUSED*/ 78 boolean_t 79 cpudrv_mach_init(cpudrv_devstate_t *cpudsp) 80 { 81 return (B_TRUE); 82 } 83 84 /* 85 * On SPARC all instances support power management unless attach fails. 86 * In the case of attach failure, cpudrv_enabled will be false. 87 */ 88 /*ARGSUSED*/ 89 boolean_t 90 cpudrv_is_enabled(cpudrv_devstate_t *cpudsp) 91 { 92 return (cpudrv_enabled); 93 } 94 95 void 96 cpudrv_set_supp_freqs(cpudrv_devstate_t *cpudsp) 97 { 98 int *speeds; 99 uint_t nspeeds; 100 101 CPUDRV_GET_SPEEDS(cpudsp, speeds, nspeeds); 102 if (nspeeds == 0) 103 return; 104 cpupm_set_supp_freqs(cpudsp->cp, speeds, nspeeds); 105 CPUDRV_FREE_SPEEDS(speeds, nspeeds); 106 } 107