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firmware.c

/*
 *  pSeries firmware setup code.
 *
 *  Portions from arch/powerpc/platforms/pseries/setup.c:
 *   Copyright (C) 1995  Linus Torvalds
 *   Adapted from 'alpha' version by Gary Thomas
 *   Modified by Cort Dougan (cort@cs.nmt.edu)
 *   Modified by PPC64 Team, IBM Corp
 *
 *  Portions from arch/powerpc/kernel/firmware.c
 *   Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
 *   Modifications for ppc64:
 *    Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
 *    Copyright (C) 2005 Stephen Rothwell, IBM Corporation
 *
 *  Copyright 2006 IBM Corporation.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#undef DEBUG

#include <asm/firmware.h>
#include <asm/prom.h>
#include <asm/udbg.h>

#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif

typedef struct {
    unsigned long val;
    char * name;
} firmware_feature_t;

static __initdata firmware_feature_t
firmware_features_table[FIRMWARE_MAX_FEATURES] = {
      {FW_FEATURE_PFT,        "hcall-pft"},
      {FW_FEATURE_TCE,        "hcall-tce"},
      {FW_FEATURE_SPRG0,            "hcall-sprg0"},
      {FW_FEATURE_DABR,       "hcall-dabr"},
      {FW_FEATURE_COPY,       "hcall-copy"},
      {FW_FEATURE_ASR,        "hcall-asr"},
      {FW_FEATURE_DEBUG,            "hcall-debug"},
      {FW_FEATURE_PERF,       "hcall-perf"},
      {FW_FEATURE_DUMP,       "hcall-dump"},
      {FW_FEATURE_INTERRUPT,        "hcall-interrupt"},
      {FW_FEATURE_MIGRATE,          "hcall-migrate"},
      {FW_FEATURE_PERFMON,          "hcall-perfmon"},
      {FW_FEATURE_CRQ,        "hcall-crq"},
      {FW_FEATURE_VIO,        "hcall-vio"},
      {FW_FEATURE_RDMA,       "hcall-rdma"},
      {FW_FEATURE_LLAN,       "hcall-lLAN"},
      {FW_FEATURE_BULK,       "hcall-bulk"},
      {FW_FEATURE_XDABR,            "hcall-xdabr"},
      {FW_FEATURE_MULTITCE,         "hcall-multi-tce"},
      {FW_FEATURE_SPLPAR,           "hcall-splpar"},
      {FW_FEATURE_BULK_REMOVE,      "hcall-bulk"},
};

/* Build up the firmware features bitmask using the contents of
 * device-tree/ibm,hypertas-functions.  Ultimately this functionality may
 * be moved into prom.c prom_init().
 */
void __init fw_feature_init(const char *hypertas, unsigned long len)
{
      const char *s;
      int i;

      DBG(" -> fw_feature_init()\n");

      for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
            for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) {
                  /* check value against table of strings */
                  if (!firmware_features_table[i].name ||
                      strcmp(firmware_features_table[i].name, s))
                        continue;

                  /* we have a match */
                  powerpc_firmware_features |=
                        firmware_features_table[i].val;
                  break;
            }
      }

      DBG(" <- fw_feature_init()\n");
}

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