Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[linux-2.6] / 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 #undef DEBUG
25
26 #include <asm/firmware.h>
27 #include <asm/prom.h>
28 #include <asm/udbg.h>
29
30 #ifdef DEBUG
31 #define DBG(fmt...) udbg_printf(fmt)
32 #else
33 #define DBG(fmt...)
34 #endif
35
36 typedef struct {
37     unsigned long val;
38     char * name;
39 } firmware_feature_t;
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,               "hcall-bulk"},
60         {FW_FEATURE_XDABR,              "hcall-xdabr"},
61         {FW_FEATURE_MULTITCE,           "hcall-multi-tce"},
62         {FW_FEATURE_SPLPAR,             "hcall-splpar"},
63         {FW_FEATURE_BULK_REMOVE,        "hcall-bulk"},
64 };
65
66 /* Build up the firmware features bitmask using the contents of
67  * device-tree/ibm,hypertas-functions.  Ultimately this functionality may
68  * be moved into prom.c prom_init().
69  */
70 void __init fw_feature_init(const char *hypertas, unsigned long len)
71 {
72         const char *s;
73         int i;
74
75         DBG(" -> fw_feature_init()\n");
76
77         for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
78                 for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) {
79                         /* check value against table of strings */
80                         if (!firmware_features_table[i].name ||
81                             strcmp(firmware_features_table[i].name, s))
82                                 continue;
83
84                         /* we have a match */
85                         powerpc_firmware_features |=
86                                 firmware_features_table[i].val;
87                         break;
88                 }
89         }
90
91         DBG(" <- fw_feature_init()\n");
92 }