1 | /* |
---|
2 | * cpuIdent.c -- Cpu identification code |
---|
3 | * |
---|
4 | * Copyright (C) 1999 Eric Valette. valette@crf.canon.fr |
---|
5 | * |
---|
6 | * Added MPC8260 Andy Dachs <a.dachs@sstl.co.uk> |
---|
7 | * Surrey Satellite Technology Limited |
---|
8 | * |
---|
9 | * The license and distribution terms for this file may be |
---|
10 | * found in the file LICENSE in this distribution or at |
---|
11 | * http://www.rtems.org/license/LICENSE. |
---|
12 | * |
---|
13 | */ |
---|
14 | |
---|
15 | #include <libcpu/cpuIdent.h> |
---|
16 | #include <libcpu/spr.h> |
---|
17 | #include <rtems/bspIo.h> |
---|
18 | |
---|
19 | /* |
---|
20 | * Generate inline code to read Processor Version Register |
---|
21 | */ |
---|
22 | SPR_RO(PPC_PVR) |
---|
23 | |
---|
24 | ppc_cpu_id_t current_ppc_cpu = PPC_UNKNOWN; |
---|
25 | ppc_cpu_revision_t current_ppc_revision = 0xff; |
---|
26 | ppc_feature_t current_ppc_features; |
---|
27 | |
---|
28 | const char *get_ppc_cpu_type_name(ppc_cpu_id_t cpu) |
---|
29 | { |
---|
30 | switch (cpu) { |
---|
31 | case PPC_405: return "PPC405"; |
---|
32 | case PPC_405GP: return "PPC405GP"; |
---|
33 | case PPC_405EX: return "PPC405EX"; |
---|
34 | case PPC_440: return "PPC440"; |
---|
35 | case PPC_601: return "MPC601"; |
---|
36 | case PPC_5XX: return "MPC5XX"; |
---|
37 | case PPC_603: return "MPC603"; |
---|
38 | case PPC_603ev: return "MPC603ev"; |
---|
39 | case PPC_604: return "MPC604"; |
---|
40 | case PPC_750: return "MPC750"; |
---|
41 | case PPC_750_IBM: return "IBM PPC750"; |
---|
42 | case PPC_7400: return "MPC7400"; |
---|
43 | case PPC_7455: return "MPC7455"; |
---|
44 | case PPC_7457: return "MPC7457"; |
---|
45 | case PPC_603le: return "MPC603le"; |
---|
46 | case PPC_604e: return "MPC604e"; |
---|
47 | case PPC_604r: return "MPC604r"; |
---|
48 | case PPC_620: return "MPC620"; |
---|
49 | case PPC_860: return "MPC860"; |
---|
50 | case PPC_8260: return "MPC8260"; |
---|
51 | case PPC_8245: return "MPC8245"; |
---|
52 | case PPC_8540: return "MPC8540"; |
---|
53 | case PPC_PSIM: return "PSIM"; |
---|
54 | case PPC_e200z0: return "e200z0"; |
---|
55 | case PPC_e200z1: return "e200z1"; |
---|
56 | case PPC_e200z4: return "e200z4"; |
---|
57 | case PPC_e200z6: return "e200z6"; |
---|
58 | case PPC_e200z7: return "e200z7"; |
---|
59 | case PPC_e500v2: return "e500v2"; |
---|
60 | case PPC_e6500: return "e6500"; |
---|
61 | default: |
---|
62 | printk("Unknown CPU value of 0x%x. Please add it to " |
---|
63 | "<libcpu/powerpc/shared/include/cpuIdent.c>\n", cpu ); |
---|
64 | } |
---|
65 | return "UNKNOWN"; |
---|
66 | } |
---|
67 | |
---|
68 | ppc_cpu_id_t get_ppc_cpu_type(void) |
---|
69 | { |
---|
70 | /* |
---|
71 | * cpu types listed here have the lowermost nibble as a version identifier |
---|
72 | * we will tweak them to the standard version |
---|
73 | */ |
---|
74 | const uint32_t ppc_cpu_id_version_nibble[] = { |
---|
75 | PPC_e200z0, |
---|
76 | PPC_e200z1, |
---|
77 | PPC_e200z4, |
---|
78 | PPC_e200z6, |
---|
79 | PPC_e200z7 |
---|
80 | }; |
---|
81 | |
---|
82 | unsigned int pvr; |
---|
83 | int i; |
---|
84 | |
---|
85 | if ( PPC_UNKNOWN != current_ppc_cpu ) |
---|
86 | return current_ppc_cpu; |
---|
87 | |
---|
88 | pvr = (_read_PPC_PVR() >> 16); |
---|
89 | /* |
---|
90 | * apply tweaks to ignore version |
---|
91 | */ |
---|
92 | for (i = 0; |
---|
93 | i < (sizeof(ppc_cpu_id_version_nibble) |
---|
94 | /sizeof(ppc_cpu_id_version_nibble[0])); |
---|
95 | i++) { |
---|
96 | if ((pvr & 0xfff0) == (ppc_cpu_id_version_nibble[i] & 0xfff0)) { |
---|
97 | pvr = ppc_cpu_id_version_nibble[i]; |
---|
98 | break; |
---|
99 | } |
---|
100 | } |
---|
101 | |
---|
102 | current_ppc_cpu = (ppc_cpu_id_t) pvr; |
---|
103 | |
---|
104 | switch (pvr) { |
---|
105 | case PPC_405: |
---|
106 | case PPC_405GP: |
---|
107 | case PPC_405EX: |
---|
108 | case PPC_440: |
---|
109 | case PPC_601: |
---|
110 | case PPC_5XX: |
---|
111 | case PPC_603: |
---|
112 | case PPC_603ev: |
---|
113 | case PPC_603le: |
---|
114 | case PPC_604: |
---|
115 | case PPC_604r: |
---|
116 | case PPC_750: |
---|
117 | case PPC_750_IBM: |
---|
118 | case PPC_7400: |
---|
119 | case PPC_7455: |
---|
120 | case PPC_7457: |
---|
121 | case PPC_604e: |
---|
122 | case PPC_620: |
---|
123 | case PPC_860: |
---|
124 | case PPC_8260: |
---|
125 | case PPC_8245: |
---|
126 | case PPC_PSIM: |
---|
127 | case PPC_8540: |
---|
128 | case PPC_e200z0: |
---|
129 | case PPC_e200z1: |
---|
130 | case PPC_e200z4: |
---|
131 | case PPC_e200z6: |
---|
132 | case PPC_e200z7: |
---|
133 | case PPC_e300c1: |
---|
134 | case PPC_e300c2: |
---|
135 | case PPC_e300c3: |
---|
136 | case PPC_e500v2: |
---|
137 | case PPC_e6500: |
---|
138 | break; |
---|
139 | default: |
---|
140 | printk("Unknown PVR value of 0x%x. Please add it to " |
---|
141 | "<libcpu/powerpc/shared/include/cpuIdent.c>\n", pvr ); |
---|
142 | return PPC_UNKNOWN; |
---|
143 | } |
---|
144 | |
---|
145 | /* determine features */ |
---|
146 | |
---|
147 | /* FIXME: This is incomplete; I couldn't go through all the |
---|
148 | * manuals (yet). |
---|
149 | */ |
---|
150 | switch ( current_ppc_cpu ) { |
---|
151 | case PPC_7455: |
---|
152 | case PPC_7457: |
---|
153 | current_ppc_features.has_8_bats = 1; |
---|
154 | case PPC_7400: |
---|
155 | /* NOTE: PSIM PVR doesn't tell us anything (its |
---|
156 | * contents are not set based on what model |
---|
157 | * the user chooses but has to be programmed via |
---|
158 | * the device file with the special value 0xfffe |
---|
159 | * telling us that we have a 'psim cpu'). |
---|
160 | * |
---|
161 | * I'm not sure pagetables work if the user chooses |
---|
162 | * e.g., the 603 model... |
---|
163 | */ |
---|
164 | case PPC_PSIM: |
---|
165 | current_ppc_features.has_altivec = 1; |
---|
166 | case PPC_604: |
---|
167 | case PPC_604e: |
---|
168 | case PPC_604r: |
---|
169 | case PPC_750: |
---|
170 | case PPC_750_IBM: |
---|
171 | current_ppc_features.has_hw_ptbl_lkup = 1; |
---|
172 | case PPC_8260: |
---|
173 | case PPC_8245: |
---|
174 | case PPC_601: |
---|
175 | case PPC_603: |
---|
176 | case PPC_603e: |
---|
177 | case PPC_603ev: |
---|
178 | case PPC_603le: |
---|
179 | current_ppc_features.is_60x = 1; |
---|
180 | default: |
---|
181 | break; |
---|
182 | } |
---|
183 | |
---|
184 | switch ( current_ppc_cpu ) { |
---|
185 | case PPC_e6500: |
---|
186 | current_ppc_features.has_altivec = 1; |
---|
187 | break; |
---|
188 | default: |
---|
189 | break; |
---|
190 | } |
---|
191 | |
---|
192 | switch ( current_ppc_cpu ) { |
---|
193 | case PPC_405: |
---|
194 | case PPC_405GP: |
---|
195 | case PPC_405EX: |
---|
196 | current_ppc_features.is_bookE = PPC_BOOKE_405; |
---|
197 | break; |
---|
198 | case PPC_440: |
---|
199 | current_ppc_features.is_bookE = PPC_BOOKE_STD; |
---|
200 | break; |
---|
201 | case PPC_8540: |
---|
202 | case PPC_e200z0: |
---|
203 | case PPC_e200z1: |
---|
204 | case PPC_e200z4: |
---|
205 | case PPC_e200z6: |
---|
206 | case PPC_e200z7: |
---|
207 | case PPC_e500v2: |
---|
208 | case PPC_e6500: |
---|
209 | current_ppc_features.is_bookE = PPC_BOOKE_E500; |
---|
210 | break; |
---|
211 | default: |
---|
212 | break; |
---|
213 | } |
---|
214 | |
---|
215 | switch ( current_ppc_cpu ) { |
---|
216 | case PPC_860: |
---|
217 | current_ppc_features.has_16byte_clne = 1; |
---|
218 | default: |
---|
219 | break; |
---|
220 | } |
---|
221 | |
---|
222 | switch ( current_ppc_cpu ) { |
---|
223 | case PPC_603e: |
---|
224 | case PPC_603ev: |
---|
225 | case PPC_603le: |
---|
226 | case PPC_e300c1: |
---|
227 | case PPC_e300c2: |
---|
228 | case PPC_e300c3: |
---|
229 | case PPC_8240: |
---|
230 | current_ppc_features.has_shadowed_gprs = 1; |
---|
231 | default: |
---|
232 | break; |
---|
233 | } |
---|
234 | |
---|
235 | return current_ppc_cpu; |
---|
236 | } |
---|
237 | |
---|
238 | ppc_cpu_revision_t get_ppc_cpu_revision(void) |
---|
239 | { |
---|
240 | ppc_cpu_revision_t rev = (ppc_cpu_revision_t) (_read_PPC_PVR() & 0xffff); |
---|
241 | current_ppc_revision = rev; |
---|
242 | return rev; |
---|
243 | } |
---|