Pileus Git - ~andy/linux/blob - arch/powerpc/platforms/pseries/firmware.c

   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 <asm/firmware.h>
  26 #include <asm/prom.h>
  27 #include <asm/udbg.h>
  28
  29 #include "pseries.h"
  30
  31 typedef struct {
  32     unsigned long val;
  33     char * name;
  34 } firmware_feature_t;
  35
  36 /*
  37  * The names in this table match names in rtas/ibm,hypertas-functions.  If the
  38  * entry ends in a '*', only upto the '*' is matched.  Otherwise the entire
  39  * string must match.
  40  */
  41 static __initdata firmware_feature_t
  42 firmware_features_table[FIRMWARE_MAX_FEATURES] = {
  43         {FW_FEATURE_PFT,                "hcall-pft"},
  44         {FW_FEATURE_TCE,                "hcall-tce"},
  45         {FW_FEATURE_SPRG0,              "hcall-sprg0"},
  46         {FW_FEATURE_DABR,               "hcall-dabr"},
  47         {FW_FEATURE_COPY,               "hcall-copy"},
  48         {FW_FEATURE_ASR,                "hcall-asr"},
  49         {FW_FEATURE_DEBUG,              "hcall-debug"},
  50         {FW_FEATURE_PERF,               "hcall-perf"},
  51         {FW_FEATURE_DUMP,               "hcall-dump"},
  52         {FW_FEATURE_INTERRUPT,          "hcall-interrupt"},
  53         {FW_FEATURE_MIGRATE,            "hcall-migrate"},
  54         {FW_FEATURE_PERFMON,            "hcall-perfmon"},
  55         {FW_FEATURE_CRQ,                "hcall-crq"},
  56         {FW_FEATURE_VIO,                "hcall-vio"},
  57         {FW_FEATURE_RDMA,               "hcall-rdma"},
  58         {FW_FEATURE_LLAN,               "hcall-lLAN"},
  59         {FW_FEATURE_BULK_REMOVE,        "hcall-bulk"},
  60         {FW_FEATURE_XDABR,              "hcall-xdabr"},
  61         {FW_FEATURE_MULTITCE,           "hcall-multi-tce"},
  62         {FW_FEATURE_SPLPAR,             "hcall-splpar"},
  63         {FW_FEATURE_VPHN,               "hcall-vphn"},
  64         {FW_FEATURE_SET_MODE,           "hcall-set-mode"},
  65         {FW_FEATURE_BEST_ENERGY,        "hcall-best-energy-1*"},
  66 };
  67
  68 /* Build up the firmware features bitmask using the contents of
  69  * device-tree/ibm,hypertas-functions.  Ultimately this functionality may
  70  * be moved into prom.c prom_init().
  71  */
  72 void __init fw_feature_init(const char *hypertas, unsigned long len)
  73 {
  74         const char *s;
  75         int i;
  76
  77         pr_debug(" -> fw_feature_init()\n");
  78
  79         for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
  80                 for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) {
  81                         const char *name = firmware_features_table[i].name;
  82                         size_t size;
  83                         /* check value against table of strings */
  84                         if (!name)
  85                                 continue;
  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                                 firmware_features_table[i].val;
 100                         break;
 101                 }
 102         }
 103
 104         pr_debug(" <- fw_feature_init()\n");
 105 }