1 /* 2 * pSeries firmware setup code. 3 * 4 * Portions from arch/powerpc/platforms/pseries/setup.c: 5 * Copyright (C) 1995 Linus Torvalds 6 * Adapted from 'alpha' version by Gary Thomas 7 * Modified by Cort Dougan (cort@cs.nmt.edu) 8 * Modified by PPC64 Team, IBM Corp 9 * 10 * Portions from arch/powerpc/kernel/firmware.c 11 * Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org) 12 * Modifications for ppc64: 13 * Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com> 14 * Copyright (C) 2005 Stephen Rothwell, IBM Corporation 15 * 16 * Copyright 2006 IBM Corporation. 17 * 18 * This program is free software; you can redistribute it and/or 19 * modify it under the terms of the GNU General Public License 20 * as published by the Free Software Foundation; either version 21 * 2 of the License, or (at your option) any later version. 22 */ 23 24 25 #include <linux/of_fdt.h> 26 #include <asm/firmware.h> 27 #include <asm/prom.h> 28 #include <asm/udbg.h> 29 30 #include "pseries.h" 31 32 struct hypertas_fw_feature { 33 unsigned long val; 34 char * name; 35 }; 36 37 /* 38 * The names in this table match names in rtas/ibm,hypertas-functions. If the 39 * entry ends in a '*', only upto the '*' is matched. Otherwise the entire 40 * string must match. 41 */ 42 static __initdata struct hypertas_fw_feature 43 hypertas_fw_features_table[] = { 44 {FW_FEATURE_PFT, "hcall-pft"}, 45 {FW_FEATURE_TCE, "hcall-tce"}, 46 {FW_FEATURE_SPRG0, "hcall-sprg0"}, 47 {FW_FEATURE_DABR, "hcall-dabr"}, 48 {FW_FEATURE_COPY, "hcall-copy"}, 49 {FW_FEATURE_ASR, "hcall-asr"}, 50 {FW_FEATURE_DEBUG, "hcall-debug"}, 51 {FW_FEATURE_PERF, "hcall-perf"}, 52 {FW_FEATURE_DUMP, "hcall-dump"}, 53 {FW_FEATURE_INTERRUPT, "hcall-interrupt"}, 54 {FW_FEATURE_MIGRATE, "hcall-migrate"}, 55 {FW_FEATURE_PERFMON, "hcall-perfmon"}, 56 {FW_FEATURE_CRQ, "hcall-crq"}, 57 {FW_FEATURE_VIO, "hcall-vio"}, 58 {FW_FEATURE_RDMA, "hcall-rdma"}, 59 {FW_FEATURE_LLAN, "hcall-lLAN"}, 60 {FW_FEATURE_BULK_REMOVE, "hcall-bulk"}, 61 {FW_FEATURE_XDABR, "hcall-xdabr"}, 62 {FW_FEATURE_MULTITCE, "hcall-multi-tce"}, 63 {FW_FEATURE_SPLPAR, "hcall-splpar"}, 64 {FW_FEATURE_VPHN, "hcall-vphn"}, 65 {FW_FEATURE_SET_MODE, "hcall-set-mode"}, 66 {FW_FEATURE_BEST_ENERGY, "hcall-best-energy-1*"}, 67 }; 68 69 /* Build up the firmware features bitmask using the contents of 70 * device-tree/ibm,hypertas-functions. Ultimately this functionality may 71 * be moved into prom.c prom_init(). 72 */ 73 static void __init fw_hypertas_feature_init(const char *hypertas, 74 unsigned long len) 75 { 76 const char *s; 77 int i; 78 79 pr_debug(" -> fw_hypertas_feature_init()\n"); 80 81 for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) { 82 for (i = 0; i < ARRAY_SIZE(hypertas_fw_features_table); i++) { 83 const char *name = hypertas_fw_features_table[i].name; 84 size_t size; 85 86 /* 87 * If there is a '*' at the end of name, only check 88 * upto there 89 */ 90 size = strlen(name); 91 if (size && name[size - 1] == '*') { 92 if (strncmp(name, s, size - 1)) 93 continue; 94 } else if (strcmp(name, s)) 95 continue; 96 97 /* we have a match */ 98 powerpc_firmware_features |= 99 hypertas_fw_features_table[i].val; 100 break; 101 } 102 } 103 104 pr_debug(" <- fw_hypertas_feature_init()\n"); 105 } 106 107 struct vec5_fw_feature { 108 unsigned long val; 109 unsigned int feature; 110 }; 111 112 static __initdata struct vec5_fw_feature 113 vec5_fw_features_table[] = { 114 {FW_FEATURE_TYPE1_AFFINITY, OV5_TYPE1_AFFINITY}, 115 {FW_FEATURE_PRRN, OV5_PRRN}, 116 }; 117 118 static void __init fw_vec5_feature_init(const char *vec5, unsigned long len) 119 { 120 unsigned int index, feat; 121 int i; 122 123 pr_debug(" -> fw_vec5_feature_init()\n"); 124 125 for (i = 0; i < ARRAY_SIZE(vec5_fw_features_table); i++) { 126 index = OV5_INDX(vec5_fw_features_table[i].feature); 127 feat = OV5_FEAT(vec5_fw_features_table[i].feature); 128 129 if (vec5[index] & feat) 130 powerpc_firmware_features |= 131 vec5_fw_features_table[i].val; 132 } 133 134 pr_debug(" <- fw_vec5_feature_init()\n"); 135 } 136 137 /* 138 * Called very early, MMU is off, device-tree isn't unflattened 139 */ 140 static int __init probe_fw_features(unsigned long node, const char *uname, int 141 depth, void *data) 142 { 143 const char *prop; 144 int len; 145 static int hypertas_found; 146 static int vec5_found; 147 148 if (depth != 1) 149 return 0; 150 151 if (!strcmp(uname, "rtas") || !strcmp(uname, "rtas@0")) { 152 prop = of_get_flat_dt_prop(node, "ibm,hypertas-functions", 153 &len); 154 if (prop) { 155 powerpc_firmware_features |= FW_FEATURE_LPAR; 156 fw_hypertas_feature_init(prop, len); 157 } 158 159 hypertas_found = 1; 160 } 161 162 if (!strcmp(uname, "chosen")) { 163 prop = of_get_flat_dt_prop(node, "ibm,architecture-vec-5", 164 &len); 165 if (prop) 166 fw_vec5_feature_init(prop, len); 167 168 vec5_found = 1; 169 } 170 171 return hypertas_found && vec5_found; 172 } 173 174 void __init pseries_probe_fw_features(void) 175 { 176 of_scan_flat_dt(probe_fw_features, NULL); 177 } 178