firmware.c

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/*
 *  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 ([email protected])
 *   Modified by PPC64 Team, IBM Corp
 *
 *  Portions from arch/powerpc/kernel/firmware.c
 *   Copyright (C) 2001 Ben. Herrenschmidt ([email protected])
 *   Modifications for ppc64:
 *    Copyright (C) 2003 Dave Engebretsen <[email protected]>
 *    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.
 */


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

#include "pseries.h"

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_REMOVE,    "hcall-bulk"},
    {FW_FEATURE_XDABR,      "hcall-xdabr"},
    {FW_FEATURE_MULTITCE,       "hcall-multi-tce"},
    {FW_FEATURE_SPLPAR,     "hcall-splpar"},
    {FW_FEATURE_VPHN,       "hcall-vphn"},
};

/* 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;

    pr_debug(" -> 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;
        }
    }

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