1 /* Processor capability information handling macros. PowerPC version.
2 Copyright (C) 2005-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #ifndef _DL_PROCINFO_H
20 #define _DL_PROCINFO_H 1
21
22 #include <ldsodefs.h>
23 #include <sysdep.h> /* This defines the PPC_FEATURE[2]_* macros. */
24
25 /* The total number of available bits (including those prior to
26 _DL_HWCAP_FIRST). Some of these bits might not be used. */
27 #define _DL_HWCAP_COUNT 64
28
29 /* Features started at bit 31 and decremented as new features were added. */
30 #define _DL_HWCAP_LAST 31
31
32 /* AT_HWCAP2 features started at bit 31 and decremented as new features were
33 added. HWCAP2 feature bits start at bit 0. */
34 #define _DL_HWCAP2_LAST 31
35
36 /* These bits influence library search. */
37 #define HWCAP_IMPORTANT (PPC_FEATURE_HAS_ALTIVEC \
38 + PPC_FEATURE_HAS_DFP)
39
40 #define _DL_PLATFORMS_COUNT 16
41
42 #define _DL_FIRST_PLATFORM 32
43 /* Mask to filter out platforms. */
44 #define _DL_HWCAP_PLATFORM (((1ULL << _DL_PLATFORMS_COUNT) - 1) \
45 << _DL_FIRST_PLATFORM)
46
47 /* Platform bits (relative to _DL_FIRST_PLATFORM). */
48 #define PPC_PLATFORM_POWER4 0
49 #define PPC_PLATFORM_PPC970 1
50 #define PPC_PLATFORM_POWER5 2
51 #define PPC_PLATFORM_POWER5_PLUS 3
52 #define PPC_PLATFORM_POWER6 4
53 #define PPC_PLATFORM_CELL_BE 5
54 #define PPC_PLATFORM_POWER6X 6
55 #define PPC_PLATFORM_POWER7 7
56 #define PPC_PLATFORM_PPCA2 8
57 #define PPC_PLATFORM_PPC405 9
58 #define PPC_PLATFORM_PPC440 10
59 #define PPC_PLATFORM_PPC464 11
60 #define PPC_PLATFORM_PPC476 12
61 #define PPC_PLATFORM_POWER8 13
62 #define PPC_PLATFORM_POWER9 14
63 #define PPC_PLATFORM_POWER10 15
64
65 static inline const char *
66 __attribute__ ((unused))
67 _dl_hwcap_string (int idx)
68 {
69 return GLRO(dl_powerpc_cap_flags)[idx];
70 }
71
72 static inline int
73 __attribute__ ((unused, always_inline))
74 _dl_string_platform (const char *str)
75 {
76 if (str == NULL)
77 return -1;
78
79 if (strncmp (str, "power", 5) == 0)
80 {
81 int ret;
82 str += 5;
83 switch (*str)
84 {
85 case '1':
86 if (str[1] == '0')
87 {
88 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER10;
89 str++;
90 }
91 else
92 return -1;
93 break;
94 case '4':
95 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
96 break;
97 case '5':
98 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
99 if (str[1] == '+')
100 {
101 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
102 ++str;
103 }
104 break;
105 case '6':
106 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
107 if (str[1] == 'x')
108 {
109 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
110 ++str;
111 }
112 break;
113 case '7':
114 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER7;
115 break;
116 case '8':
117 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER8;
118 break;
119 case '9':
120 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER9;
121 break;
122 default:
123 return -1;
124 }
125 if (str[1] == '\0')
126 return ret;
127 }
128 else if (strncmp (str, "ppc", 3) == 0)
129 {
130 if (strcmp (str + 3, "970") == 0)
131 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
132 else if (strcmp (str + 3, "-cell-be") == 0)
133 return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
134 else if (strcmp (str + 3, "a2") == 0)
135 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPCA2;
136 else if (strcmp (str + 3, "405") == 0)
137 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC405;
138 else if (strcmp (str + 3, "440") == 0)
139 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC440;
140 else if (strcmp (str + 3, "464") == 0)
141 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC464;
142 else if (strcmp (str + 3, "476") == 0)
143 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC476;
144 }
145
146 return -1;
147 }
148
149 #if IS_IN (rtld)
150 static inline void
151 cache_geometry (const char * name, unsigned long int geometry)
152 {
153 unsigned long int assocty, line;
154
155 _dl_printf ("%s", name);
156
157 line = geometry & 0xffff;
158 assocty = (geometry >> 16) & 0xffff;
159
160 if (line == 0)
161 _dl_printf ("Unknown line size, ");
162 else
163 _dl_printf ("%luB line size, ", line);
164
165 switch (assocty)
166 {
167 case 0:
168 _dl_printf ("Unknown associativity");
169 break;
170 case 1:
171 _dl_printf ("Directly mapped");
172 break;
173 case 0xffff:
174 _dl_printf ("Fully associative");
175 break;
176 default:
177 _dl_printf ("%lu-way set associative", assocty);
178 }
179 }
180
181 static inline int
182 __attribute__ ((unused))
183 _dl_procinfo (unsigned int type, unsigned long int word)
184 {
185 switch(type)
186 {
187 case AT_HWCAP:
188 _dl_printf ("AT_HWCAP: ");
189
190 for (int i = 0; i <= _DL_HWCAP_LAST; ++i)
191 if (word & (1 << i))
192 _dl_printf (" %s", _dl_hwcap_string (i));
193 break;
194 case AT_HWCAP2:
195 {
196 unsigned int offset = _DL_HWCAP_LAST + 1;
197
198 _dl_printf ("AT_HWCAP2: ");
199
200 /* We have to go through them all because the kernel added the
201 AT_HWCAP2 features starting with the high bits. */
202 for (int i = 0; i <= _DL_HWCAP2_LAST; ++i)
203 if (word & (1 << i))
204 _dl_printf (" %s", _dl_hwcap_string (offset + i));
205 break;
206 }
207 case AT_L1I_CACHEGEOMETRY:
208 {
209 cache_geometry ("AT_L1I_CACHEGEOMETRY: ", word);
210 break;
211 }
212 case AT_L1D_CACHEGEOMETRY:
213 {
214 cache_geometry ("AT_L1D_CACHEGEOMETRY: ", word);
215 break;
216 }
217 case AT_L2_CACHEGEOMETRY:
218 {
219 cache_geometry ("AT_L2_CACHEGEOMETRY: ", word);
220 break;
221 }
222 case AT_L3_CACHEGEOMETRY:
223 {
224 cache_geometry ("AT_L3_CACHEGEOMETRY: ", word);
225 break;
226 }
227 default:
228 /* Fallback to generic output mechanism. */
229 return -1;
230 }
231 _dl_printf ("\n");
232 return 0;
233 }
234 #endif
235
236 #endif /* dl-procinfo.h */