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 {FW_FEATURE_HPT_RESIZE, "hcall-hpt-resize"}, 68 }; 69 70 /* Build up the firmware features bitmask using the contents of 71 * device-tree/ibm,hypertas-functions. Ultimately this functionality may 72 * be moved into prom.c prom_init(). 73 */ 74 static void __init fw_hypertas_feature_init(const char *hypertas, 75 unsigned long len) 76 { 77 const char *s; 78 int i; 79 80 pr_debug(" -> fw_hypertas_feature_init()\n"); 81 82 for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) { 83 for (i = 0; i < ARRAY_SIZE(hypertas_fw_features_table); i++) { 84 const char *name = hypertas_fw_features_table[i].name; 85 size_t size; 86 87 /* 88 * If there is a '*' at the end of name, only check 89 * upto there 90 */ 91 size = strlen(name); 92 if (size && name[size - 1] == '*') { 93 if (strncmp(name, s, size - 1)) 94 continue; 95 } else if (strcmp(name, s)) 96 continue; 97 98 /* we have a match */ 99 powerpc_firmware_features |= 100 hypertas_fw_features_table[i].val; 101 break; 102 } 103 } 104 105 pr_debug(" <- fw_hypertas_feature_init()\n"); 106 } 107 108 struct vec5_fw_feature { 109 unsigned long val; 110 unsigned int feature; 111 }; 112 113 static __initdata struct vec5_fw_feature 114 vec5_fw_features_table[] = { 115 {FW_FEATURE_TYPE1_AFFINITY, OV5_TYPE1_AFFINITY}, 116 {FW_FEATURE_PRRN, OV5_PRRN}, 117 {FW_FEATURE_DRMEM_V2, OV5_DRMEM_V2}, 118 {FW_FEATURE_DRC_INFO, OV5_DRC_INFO}, 119 }; 120 121 static void __init fw_vec5_feature_init(const char *vec5, unsigned long len) 122 { 123 unsigned int index, feat; 124 int i; 125 126 pr_debug(" -> fw_vec5_feature_init()\n"); 127 128 for (i = 0; i < ARRAY_SIZE(vec5_fw_features_table); i++) { 129 index = OV5_INDX(vec5_fw_features_table[i].feature); 130 feat = OV5_FEAT(vec5_fw_features_table[i].feature); 131 132 if (index < len && (vec5[index] & feat)) 133 powerpc_firmware_features |= 134 vec5_fw_features_table[i].val; 135 } 136 137 pr_debug(" <- fw_vec5_feature_init()\n"); 138 } 139 140 /* 141 * Called very early, MMU is off, device-tree isn't unflattened 142 */ 143 static int __init probe_fw_features(unsigned long node, const char *uname, int 144 depth, void *data) 145 { 146 const char *prop; 147 int len; 148 static int hypertas_found; 149 static int vec5_found; 150 151 if (depth != 1) 152 return 0; 153 154 if (!strcmp(uname, "rtas") || !strcmp(uname, "rtas@0")) { 155 prop = of_get_flat_dt_prop(node, "ibm,hypertas-functions", 156 &len); 157 if (prop) { 158 powerpc_firmware_features |= FW_FEATURE_LPAR; 159 fw_hypertas_feature_init(prop, len); 160 } 161 162 hypertas_found = 1; 163 } 164 165 if (!strcmp(uname, "chosen")) { 166 prop = of_get_flat_dt_prop(node, "ibm,architecture-vec-5", 167 &len); 168 if (prop) 169 fw_vec5_feature_init(prop, len); 170 171 vec5_found = 1; 172 } 173 174 return hypertas_found && vec5_found; 175 } 176 177 void __init pseries_probe_fw_features(void) 178 { 179 of_scan_flat_dt(probe_fw_features, NULL); 180 } 181