1 /* Processor capability information handling macros. PowerPC version.
2 Copyright (C) 2005-2021 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))
_dl_hwcap_string(int idx)67 _dl_hwcap_string (int idx)
68 {
69 return GLRO(dl_powerpc_cap_flags)[idx];
70 }
71
72 static inline int
73 __attribute__ ((unused))
_dl_string_hwcap(const char * str)74 _dl_string_hwcap (const char *str)
75 {
76 for (int i = 0; i < _DL_HWCAP_COUNT; ++i)
77 if (strcmp (str, _dl_hwcap_string (i)) == 0)
78 return i;
79 return -1;
80 }
81
82 static inline int
83 __attribute__ ((unused, always_inline))
_dl_string_platform(const char * str)84 _dl_string_platform (const char *str)
85 {
86 if (str == NULL)
87 return -1;
88
89 if (strncmp (str, "power", 5) == 0)
90 {
91 int ret;
92 str += 5;
93 switch (*str)
94 {
95 case '1':
96 if (str[1] == '0')
97 {
98 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER10;
99 str++;
100 }
101 else
102 return -1;
103 break;
104 case '4':
105 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
106 break;
107 case '5':
108 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
109 if (str[1] == '+')
110 {
111 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
112 ++str;
113 }
114 break;
115 case '6':
116 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
117 if (str[1] == 'x')
118 {
119 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
120 ++str;
121 }
122 break;
123 case '7':
124 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER7;
125 break;
126 case '8':
127 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER8;
128 break;
129 case '9':
130 ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER9;
131 break;
132 default:
133 return -1;
134 }
135 if (str[1] == '\0')
136 return ret;
137 }
138 else if (strncmp (str, "ppc", 3) == 0)
139 {
140 if (strcmp (str + 3, "970") == 0)
141 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
142 else if (strcmp (str + 3, "-cell-be") == 0)
143 return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
144 else if (strcmp (str + 3, "a2") == 0)
145 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPCA2;
146 else if (strcmp (str + 3, "405") == 0)
147 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC405;
148 else if (strcmp (str + 3, "440") == 0)
149 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC440;
150 else if (strcmp (str + 3, "464") == 0)
151 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC464;
152 else if (strcmp (str + 3, "476") == 0)
153 return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC476;
154 }
155
156 return -1;
157 }
158
159 #if IS_IN (rtld)
160 static inline void
cache_geometry(const char * name,unsigned long int geometry)161 cache_geometry (const char * name, unsigned long int geometry)
162 {
163 unsigned long int assocty, line;
164
165 _dl_printf ("%s", name);
166
167 line = geometry & 0xffff;
168 assocty = (geometry >> 16) & 0xffff;
169
170 if (line == 0)
171 _dl_printf ("Unknown line size, ");
172 else
173 _dl_printf ("%luB line size, ", line);
174
175 switch (assocty)
176 {
177 case 0:
178 _dl_printf ("Unknown associativity");
179 break;
180 case 1:
181 _dl_printf ("Directly mapped");
182 break;
183 case 0xffff:
184 _dl_printf ("Fully associative");
185 break;
186 default:
187 _dl_printf ("%lu-way set associative", assocty);
188 }
189 }
190
191 static inline int
192 __attribute__ ((unused))
_dl_procinfo(unsigned int type,unsigned long int word)193 _dl_procinfo (unsigned int type, unsigned long int word)
194 {
195 switch(type)
196 {
197 case AT_HWCAP:
198 _dl_printf ("AT_HWCAP: ");
199
200 for (int i = 0; i <= _DL_HWCAP_LAST; ++i)
201 if (word & (1 << i))
202 _dl_printf (" %s", _dl_hwcap_string (i));
203 break;
204 case AT_HWCAP2:
205 {
206 unsigned int offset = _DL_HWCAP_LAST + 1;
207
208 _dl_printf ("AT_HWCAP2: ");
209
210 /* We have to go through them all because the kernel added the
211 AT_HWCAP2 features starting with the high bits. */
212 for (int i = 0; i <= _DL_HWCAP2_LAST; ++i)
213 if (word & (1 << i))
214 _dl_printf (" %s", _dl_hwcap_string (offset + i));
215 break;
216 }
217 case AT_L1I_CACHEGEOMETRY:
218 {
219 cache_geometry ("AT_L1I_CACHEGEOMETRY: ", word);
220 break;
221 }
222 case AT_L1D_CACHEGEOMETRY:
223 {
224 cache_geometry ("AT_L1D_CACHEGEOMETRY: ", word);
225 break;
226 }
227 case AT_L2_CACHEGEOMETRY:
228 {
229 cache_geometry ("AT_L2_CACHEGEOMETRY: ", word);
230 break;
231 }
232 case AT_L3_CACHEGEOMETRY:
233 {
234 cache_geometry ("AT_L3_CACHEGEOMETRY: ", word);
235 break;
236 }
237 default:
238 /* Fallback to generic output mechanism. */
239 return -1;
240 }
241 _dl_printf ("\n");
242 return 0;
243 }
244 #endif
245
246 #endif /* dl-procinfo.h */
247