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 #undef DEBUG 25 26 #include <asm/firmware.h> 27 #include <asm/prom.h> 28 29 #ifdef DEBUG 30 #define DBG(fmt...) udbg_printf(fmt) 31 #else 32 #define DBG(fmt...) 33 #endif 34 35 typedef struct { 36 unsigned long val; 37 char * name; 38 } firmware_feature_t; 39 40 static __initdata firmware_feature_t 41 firmware_features_table[FIRMWARE_MAX_FEATURES] = { 42 {FW_FEATURE_PFT, "hcall-pft"}, 43 {FW_FEATURE_TCE, "hcall-tce"}, 44 {FW_FEATURE_SPRG0, "hcall-sprg0"}, 45 {FW_FEATURE_DABR, "hcall-dabr"}, 46 {FW_FEATURE_COPY, "hcall-copy"}, 47 {FW_FEATURE_ASR, "hcall-asr"}, 48 {FW_FEATURE_DEBUG, "hcall-debug"}, 49 {FW_FEATURE_PERF, "hcall-perf"}, 50 {FW_FEATURE_DUMP, "hcall-dump"}, 51 {FW_FEATURE_INTERRUPT, "hcall-interrupt"}, 52 {FW_FEATURE_MIGRATE, "hcall-migrate"}, 53 {FW_FEATURE_PERFMON, "hcall-perfmon"}, 54 {FW_FEATURE_CRQ, "hcall-crq"}, 55 {FW_FEATURE_VIO, "hcall-vio"}, 56 {FW_FEATURE_RDMA, "hcall-rdma"}, 57 {FW_FEATURE_LLAN, "hcall-lLAN"}, 58 {FW_FEATURE_BULK, "hcall-bulk"}, 59 {FW_FEATURE_XDABR, "hcall-xdabr"}, 60 {FW_FEATURE_MULTITCE, "hcall-multi-tce"}, 61 {FW_FEATURE_SPLPAR, "hcall-splpar"}, 62 {FW_FEATURE_BULK_REMOVE, "hcall-bulk"}, 63 }; 64 65 /* Build up the firmware features bitmask using the contents of 66 * device-tree/ibm,hypertas-functions. Ultimately this functionality may 67 * be moved into prom.c prom_init(). 68 */ 69 void __init fw_feature_init(void) 70 { 71 struct device_node *dn; 72 const char *hypertas, *s; 73 int len, i; 74 75 DBG(" -> fw_feature_init()\n"); 76 77 dn = of_find_node_by_path("/rtas"); 78 if (dn == NULL) { 79 printk(KERN_ERR "WARNING! Cannot find RTAS in device-tree!\n"); 80 goto out; 81 } 82 83 hypertas = get_property(dn, "ibm,hypertas-functions", &len); 84 if (hypertas == NULL) 85 goto out; 86 87 for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) { 88 for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) { 89 /* check value against table of strings */ 90 if (!firmware_features_table[i].name || 91 strcmp(firmware_features_table[i].name, s)) 92 continue; 93 94 /* we have a match */ 95 powerpc_firmware_features |= 96 firmware_features_table[i].val; 97 break; 98 } 99 } 100 101 out: 102 of_node_put(dn); 103 DBG(" <- fw_feature_init()\n"); 104 } 105