1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * pSeries firmware setup code.
5 * Portions from arch/powerpc/platforms/pseries/setup.c:
6 * Copyright (C) 1995 Linus Torvalds
7 * Adapted from 'alpha' version by Gary Thomas
8 * Modified by Cort Dougan (cort@cs.nmt.edu)
9 * Modified by PPC64 Team, IBM Corp
11 * Portions from arch/powerpc/kernel/firmware.c
12 * Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
13 * Modifications for ppc64:
14 * Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
15 * Copyright (C) 2005 Stephen Rothwell, IBM Corporation
17 * Copyright 2006 IBM Corporation.
21 #include <linux/of_fdt.h>
22 #include <asm/firmware.h>
28 struct hypertas_fw_feature {
34 * The names in this table match names in rtas/ibm,hypertas-functions. If the
35 * entry ends in a '*', only upto the '*' is matched. Otherwise the entire
38 static __initdata struct hypertas_fw_feature
39 hypertas_fw_features_table[] = {
40 {FW_FEATURE_PFT, "hcall-pft"},
41 {FW_FEATURE_TCE, "hcall-tce"},
42 {FW_FEATURE_SPRG0, "hcall-sprg0"},
43 {FW_FEATURE_DABR, "hcall-dabr"},
44 {FW_FEATURE_COPY, "hcall-copy"},
45 {FW_FEATURE_ASR, "hcall-asr"},
46 {FW_FEATURE_DEBUG, "hcall-debug"},
47 {FW_FEATURE_PERF, "hcall-perf"},
48 {FW_FEATURE_DUMP, "hcall-dump"},
49 {FW_FEATURE_INTERRUPT, "hcall-interrupt"},
50 {FW_FEATURE_MIGRATE, "hcall-migrate"},
51 {FW_FEATURE_PERFMON, "hcall-perfmon"},
52 {FW_FEATURE_CRQ, "hcall-crq"},
53 {FW_FEATURE_VIO, "hcall-vio"},
54 {FW_FEATURE_RDMA, "hcall-rdma"},
55 {FW_FEATURE_LLAN, "hcall-lLAN"},
56 {FW_FEATURE_BULK_REMOVE, "hcall-bulk"},
57 {FW_FEATURE_XDABR, "hcall-xdabr"},
58 {FW_FEATURE_MULTITCE, "hcall-multi-tce"},
59 {FW_FEATURE_SPLPAR, "hcall-splpar"},
60 {FW_FEATURE_VPHN, "hcall-vphn"},
61 {FW_FEATURE_SET_MODE, "hcall-set-mode"},
62 {FW_FEATURE_BEST_ENERGY, "hcall-best-energy-1*"},
63 {FW_FEATURE_HPT_RESIZE, "hcall-hpt-resize"},
64 {FW_FEATURE_BLOCK_REMOVE, "hcall-block-remove"},
65 {FW_FEATURE_PAPR_SCM, "hcall-scm"},
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().
72 static void __init fw_hypertas_feature_init(const char *hypertas,
78 pr_debug(" -> fw_hypertas_feature_init()\n");
80 for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
81 for (i = 0; i < ARRAY_SIZE(hypertas_fw_features_table); i++) {
82 const char *name = hypertas_fw_features_table[i].name;
86 * If there is a '*' at the end of name, only check
90 if (size && name[size - 1] == '*') {
91 if (strncmp(name, s, size - 1))
93 } else if (strcmp(name, s))
97 powerpc_firmware_features |=
98 hypertas_fw_features_table[i].val;
103 pr_debug(" <- fw_hypertas_feature_init()\n");
106 struct vec5_fw_feature {
108 unsigned int feature;
111 static __initdata struct vec5_fw_feature
112 vec5_fw_features_table[] = {
113 {FW_FEATURE_TYPE1_AFFINITY, OV5_TYPE1_AFFINITY},
114 {FW_FEATURE_PRRN, OV5_PRRN},
115 {FW_FEATURE_DRMEM_V2, OV5_DRMEM_V2},
116 {FW_FEATURE_DRC_INFO, OV5_DRC_INFO},
119 static void __init fw_vec5_feature_init(const char *vec5, unsigned long len)
121 unsigned int index, feat;
124 pr_debug(" -> fw_vec5_feature_init()\n");
126 for (i = 0; i < ARRAY_SIZE(vec5_fw_features_table); i++) {
127 index = OV5_INDX(vec5_fw_features_table[i].feature);
128 feat = OV5_FEAT(vec5_fw_features_table[i].feature);
130 if (index < len && (vec5[index] & feat))
131 powerpc_firmware_features |=
132 vec5_fw_features_table[i].val;
135 pr_debug(" <- fw_vec5_feature_init()\n");
139 * Called very early, MMU is off, device-tree isn't unflattened
141 static int __init probe_fw_features(unsigned long node, const char *uname, int
146 static int hypertas_found;
147 static int vec5_found;
152 if (!strcmp(uname, "rtas") || !strcmp(uname, "rtas@0")) {
153 prop = of_get_flat_dt_prop(node, "ibm,hypertas-functions",
156 powerpc_firmware_features |= FW_FEATURE_LPAR;
157 fw_hypertas_feature_init(prop, len);
163 if (!strcmp(uname, "chosen")) {
164 prop = of_get_flat_dt_prop(node, "ibm,architecture-vec-5",
167 fw_vec5_feature_init(prop, len);
172 return hypertas_found && vec5_found;
175 void __init pseries_probe_fw_features(void)
177 of_scan_flat_dt(probe_fw_features, NULL);