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 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/param.h> 28 #include <sys/fcntl.h> 29 #include <sys/promif.h> 30 #include <sys/prom_plat.h> 31 #include <sys/salib.h> 32 33 extern int is_sun4v; 34 35 /* 36 * Check if the CPU should default to 64-bit or not. 37 * UltraSPARC-1's default to 32-bit mode. 38 * Everything else defaults to 64-bit mode. 39 */ 40 41 /* 42 * Manufacturer codes for the CPUs we're interested in 43 */ 44 #define TI_JEDEC 0x17 45 #define SUNW_JEDEC 0x22 46 47 /* 48 * Implementation codes for the CPUs we're interested in 49 */ 50 #define IMPL_US_I 0x10 51 52 static pnode_t 53 visit(pnode_t node) 54 { 55 int impl, manu; 56 char name[32]; 57 static char ultrasparc[] = "SUNW,UltraSPARC"; 58 static char implementation[] = "implementation#"; 59 static char manufacturer[] = "manufacturer#"; 60 61 /* 62 * if name isn't 'SUNW,UltraSPARC', continue. 63 */ 64 if (prom_getproplen(node, "name") != sizeof (ultrasparc)) 65 return ((pnode_t)0); 66 (void) prom_getprop(node, "name", name); 67 if (strncmp(name, ultrasparc, sizeof (ultrasparc)) != 0) 68 return ((pnode_t)0); 69 70 if (prom_getproplen(node, manufacturer) != sizeof (int)) 71 return ((pnode_t)0); 72 (void) prom_getprop(node, manufacturer, (caddr_t)&manu); 73 74 if ((manu != SUNW_JEDEC) && (manu != TI_JEDEC)) 75 return ((pnode_t)0); 76 77 if (prom_getproplen(node, implementation) != sizeof (int)) 78 return ((pnode_t)0); 79 (void) prom_getprop(node, implementation, (caddr_t)&impl); 80 81 if (impl != IMPL_US_I) 82 return ((pnode_t)0); 83 84 return (node); 85 } 86 87 /* 88 * visit each node in the device tree, until we get a non-null answer 89 */ 90 static pnode_t 91 walk(pnode_t node) 92 { 93 pnode_t id; 94 95 if (visit(node)) 96 return (node); 97 98 for (node = prom_childnode(node); node; node = prom_nextnode(node)) 99 if ((id = walk(node)) != (pnode_t)0) 100 return (id); 101 102 return ((pnode_t)0); 103 } 104 105 /* 106 * Check if the CPU is an UltraSPARC-1 or not. 107 */ 108 int 109 cpu_is_ultrasparc_1(void) 110 { 111 static int cpu_checked; 112 static int cpu_default; 113 114 /* 115 * If we already checked or the machine is 116 * a sun4v, we already know the answer. 117 */ 118 if (!is_sun4v || cpu_checked == 0) { 119 if (walk(prom_rootnode())) 120 cpu_default = 1; 121 cpu_checked = 1; 122 } 123 124 return (cpu_default); 125 } 126 127 /* 128 * Retain a page or reclaim a previously retained page of physical 129 * memory for use by the prom upgrade. If successful, leave 130 * an indication that a page was retained by creating a boolean 131 * property in the root node. 132 * 133 * XXX: SUNW,retain doesn't work as expected on server systems, 134 * so we don't try to retain any memory on those systems. 135 * 136 * XXX: do a '0 to my-self' as a workaround for 4160914 137 */ 138 139 int dont_retain_memory; 140 141 void 142 retain_nvram_page(void) 143 { 144 unsigned long long phys = 0; 145 int len; 146 char name[32]; 147 static char create_prop[] = 148 "0 to my-self dev / 0 0 \" boot-retained-page\" property"; 149 static char ue10000[] = "SUNW,Ultra-Enterprise-10000"; 150 static char ue[] = "SUNW,Ultra-Enterprise"; 151 extern int verbosemode; 152 153 if (dont_retain_memory) 154 return; 155 156 if (!is_sun4v) { 157 len = prom_getproplen(prom_rootnode(), "name"); 158 if ((len != -1) && (len <= sizeof (name))) { 159 (void) prom_getprop(prom_rootnode(), "name", name); 160 if ((strcmp(name, ue) == 0) || 161 (strcmp(name, ue10000) == 0)) 162 return; 163 } 164 } 165 166 if (prom_retain("OBPnvram", PAGESIZE, PAGESIZE, &phys) != 0) { 167 printf("prom_retain failed\n"); 168 return; 169 } 170 if (verbosemode) 171 printf("retained OBPnvram page at 0x%llx\n", phys); 172 173 prom_interpret(create_prop, 0, 0, 0, 0, 0); 174 } 175