blob: c01d8f0cbe6d01a6537e0f5f295a3a910d1d892b [file] [log] [blame]
Michael Ellerman19657462006-02-10 15:47:36 +11001/*
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
35typedef struct {
36 unsigned long val;
37 char * name;
38} firmware_feature_t;
39
40static __initdata firmware_feature_t
41firmware_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};
63
64/* Build up the firmware features bitmask using the contents of
65 * device-tree/ibm,hypertas-functions. Ultimately this functionality may
66 * be moved into prom.c prom_init().
67 */
68void __init fw_feature_init(void)
69{
70 struct device_node *dn;
71 char *hypertas, *s;
72 int len, i;
73
74 DBG(" -> fw_feature_init()\n");
75
76 dn = of_find_node_by_path("/rtas");
77 if (dn == NULL) {
78 printk(KERN_ERR "WARNING! Cannot find RTAS in device-tree!\n");
79 goto out;
80 }
81
82 hypertas = get_property(dn, "ibm,hypertas-functions", &len);
83 if (hypertas == NULL)
84 goto out;
85
86 for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
87 for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) {
88 /* check value against table of strings */
89 if (!firmware_features_table[i].name ||
90 strcmp(firmware_features_table[i].name, s))
91 continue;
92
93 /* we have a match */
Michael Ellermand0160bf2006-03-27 14:26:25 +110094 powerpc_firmware_features |=
Michael Ellerman19657462006-02-10 15:47:36 +110095 firmware_features_table[i].val;
96 break;
97 }
98 }
99
100out:
101 of_node_put(dn);
102 DBG(" <- fw_feature_init()\n");
103}