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Diffstat (limited to 'arch/sh/kernel/cpu/sh4/probe.c')
-rw-r--r--arch/sh/kernel/cpu/sh4/probe.c185
1 files changed, 97 insertions, 88 deletions
diff --git a/arch/sh/kernel/cpu/sh4/probe.c b/arch/sh/kernel/cpu/sh4/probe.c
index b26e2bc5894d..9d28c88d2f9d 100644
--- a/arch/sh/kernel/cpu/sh4/probe.c
+++ b/arch/sh/kernel/cpu/sh4/probe.c
@@ -10,11 +10,10 @@
10 * License. See the file "COPYING" in the main directory of this archive 10 * License. See the file "COPYING" in the main directory of this archive
11 * for more details. 11 * for more details.
12 */ 12 */
13
14#include <linux/init.h> 13#include <linux/init.h>
14#include <linux/io.h>
15#include <asm/processor.h> 15#include <asm/processor.h>
16#include <asm/cache.h> 16#include <asm/cache.h>
17#include <asm/io.h>
18 17
19int __init detect_cpu_and_cache_system(void) 18int __init detect_cpu_and_cache_system(void)
20{ 19{
@@ -36,20 +35,20 @@ int __init detect_cpu_and_cache_system(void)
36 /* 35 /*
37 * Setup some sane SH-4 defaults for the icache 36 * Setup some sane SH-4 defaults for the icache
38 */ 37 */
39 cpu_data->icache.way_incr = (1 << 13); 38 current_cpu_data.icache.way_incr = (1 << 13);
40 cpu_data->icache.entry_shift = 5; 39 current_cpu_data.icache.entry_shift = 5;
41 cpu_data->icache.sets = 256; 40 current_cpu_data.icache.sets = 256;
42 cpu_data->icache.ways = 1; 41 current_cpu_data.icache.ways = 1;
43 cpu_data->icache.linesz = L1_CACHE_BYTES; 42 current_cpu_data.icache.linesz = L1_CACHE_BYTES;
44 43
45 /* 44 /*
46 * And again for the dcache .. 45 * And again for the dcache ..
47 */ 46 */
48 cpu_data->dcache.way_incr = (1 << 14); 47 current_cpu_data.dcache.way_incr = (1 << 14);
49 cpu_data->dcache.entry_shift = 5; 48 current_cpu_data.dcache.entry_shift = 5;
50 cpu_data->dcache.sets = 512; 49 current_cpu_data.dcache.sets = 512;
51 cpu_data->dcache.ways = 1; 50 current_cpu_data.dcache.ways = 1;
52 cpu_data->dcache.linesz = L1_CACHE_BYTES; 51 current_cpu_data.dcache.linesz = L1_CACHE_BYTES;
53 52
54 /* 53 /*
55 * Setup some generic flags we can probe 54 * Setup some generic flags we can probe
@@ -57,16 +56,16 @@ int __init detect_cpu_and_cache_system(void)
57 */ 56 */
58 if (((pvr >> 16) & 0xff) == 0x10) { 57 if (((pvr >> 16) & 0xff) == 0x10) {
59 if ((cvr & 0x02000000) == 0) 58 if ((cvr & 0x02000000) == 0)
60 cpu_data->flags |= CPU_HAS_L2_CACHE; 59 current_cpu_data.flags |= CPU_HAS_L2_CACHE;
61 if ((cvr & 0x10000000) == 0) 60 if ((cvr & 0x10000000) == 0)
62 cpu_data->flags |= CPU_HAS_DSP; 61 current_cpu_data.flags |= CPU_HAS_DSP;
63 62
64 cpu_data->flags |= CPU_HAS_LLSC; 63 current_cpu_data.flags |= CPU_HAS_LLSC;
65 } 64 }
66 65
67 /* FPU detection works for everyone */ 66 /* FPU detection works for everyone */
68 if ((cvr & 0x20000000) == 1) 67 if ((cvr & 0x20000000) == 1)
69 cpu_data->flags |= CPU_HAS_FPU; 68 current_cpu_data.flags |= CPU_HAS_FPU;
70 69
71 /* Mask off the upper chip ID */ 70 /* Mask off the upper chip ID */
72 pvr &= 0xffff; 71 pvr &= 0xffff;
@@ -77,147 +76,151 @@ int __init detect_cpu_and_cache_system(void)
77 */ 76 */
78 switch (pvr) { 77 switch (pvr) {
79 case 0x205: 78 case 0x205:
80 cpu_data->type = CPU_SH7750; 79 current_cpu_data.type = CPU_SH7750;
81 cpu_data->flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_FPU | 80 current_cpu_data.flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_FPU |
82 CPU_HAS_PERF_COUNTER; 81 CPU_HAS_PERF_COUNTER;
83 break; 82 break;
84 case 0x206: 83 case 0x206:
85 cpu_data->type = CPU_SH7750S; 84 current_cpu_data.type = CPU_SH7750S;
86 cpu_data->flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_FPU | 85 current_cpu_data.flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_FPU |
87 CPU_HAS_PERF_COUNTER; 86 CPU_HAS_PERF_COUNTER;
88 break; 87 break;
89 case 0x1100: 88 case 0x1100:
90 cpu_data->type = CPU_SH7751; 89 current_cpu_data.type = CPU_SH7751;
91 cpu_data->flags |= CPU_HAS_FPU; 90 current_cpu_data.flags |= CPU_HAS_FPU;
92 break; 91 break;
93 case 0x2000: 92 case 0x2000:
94 cpu_data->type = CPU_SH73180; 93 current_cpu_data.type = CPU_SH73180;
95 cpu_data->icache.ways = 4; 94 current_cpu_data.icache.ways = 4;
96 cpu_data->dcache.ways = 4; 95 current_cpu_data.dcache.ways = 4;
97 cpu_data->flags |= CPU_HAS_LLSC; 96 current_cpu_data.flags |= CPU_HAS_LLSC;
98 break; 97 break;
99 case 0x2001: 98 case 0x2001:
100 case 0x2004: 99 case 0x2004:
101 cpu_data->type = CPU_SH7770; 100 current_cpu_data.type = CPU_SH7770;
102 cpu_data->icache.ways = 4; 101 current_cpu_data.icache.ways = 4;
103 cpu_data->dcache.ways = 4; 102 current_cpu_data.dcache.ways = 4;
104 103
105 cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_LLSC; 104 current_cpu_data.flags |= CPU_HAS_FPU | CPU_HAS_LLSC;
106 break; 105 break;
107 case 0x2006: 106 case 0x2006:
108 case 0x200A: 107 case 0x200A:
109 if (prr == 0x61) 108 if (prr == 0x61)
110 cpu_data->type = CPU_SH7781; 109 current_cpu_data.type = CPU_SH7781;
111 else 110 else
112 cpu_data->type = CPU_SH7780; 111 current_cpu_data.type = CPU_SH7780;
113 112
114 cpu_data->icache.ways = 4; 113 current_cpu_data.icache.ways = 4;
115 cpu_data->dcache.ways = 4; 114 current_cpu_data.dcache.ways = 4;
116 115
117 cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PERF_COUNTER | 116 current_cpu_data.flags |= CPU_HAS_FPU | CPU_HAS_PERF_COUNTER |
118 CPU_HAS_LLSC; 117 CPU_HAS_LLSC;
119 break; 118 break;
120 case 0x3000: 119 case 0x3000:
121 case 0x3003: 120 case 0x3003:
122 case 0x3009: 121 case 0x3009:
123 cpu_data->type = CPU_SH7343; 122 current_cpu_data.type = CPU_SH7343;
124 cpu_data->icache.ways = 4; 123 current_cpu_data.icache.ways = 4;
125 cpu_data->dcache.ways = 4; 124 current_cpu_data.dcache.ways = 4;
126 cpu_data->flags |= CPU_HAS_LLSC; 125 current_cpu_data.flags |= CPU_HAS_LLSC;
127 break; 126 break;
128 case 0x3008: 127 case 0x3008:
129 if (prr == 0xa0) { 128 if (prr == 0xa0) {
130 cpu_data->type = CPU_SH7722; 129 current_cpu_data.type = CPU_SH7722;
131 cpu_data->icache.ways = 4; 130 current_cpu_data.icache.ways = 4;
132 cpu_data->dcache.ways = 4; 131 current_cpu_data.dcache.ways = 4;
133 cpu_data->flags |= CPU_HAS_LLSC; 132 current_cpu_data.flags |= CPU_HAS_LLSC;
134 } 133 }
135 break; 134 break;
136 case 0x8000: 135 case 0x8000:
137 cpu_data->type = CPU_ST40RA; 136 current_cpu_data.type = CPU_ST40RA;
138 cpu_data->flags |= CPU_HAS_FPU; 137 current_cpu_data.flags |= CPU_HAS_FPU;
139 break; 138 break;
140 case 0x8100: 139 case 0x8100:
141 cpu_data->type = CPU_ST40GX1; 140 current_cpu_data.type = CPU_ST40GX1;
142 cpu_data->flags |= CPU_HAS_FPU; 141 current_cpu_data.flags |= CPU_HAS_FPU;
143 break; 142 break;
144 case 0x700: 143 case 0x700:
145 cpu_data->type = CPU_SH4_501; 144 current_cpu_data.type = CPU_SH4_501;
146 cpu_data->icache.ways = 2; 145 current_cpu_data.icache.ways = 2;
147 cpu_data->dcache.ways = 2; 146 current_cpu_data.dcache.ways = 2;
148 break; 147 break;
149 case 0x600: 148 case 0x600:
150 cpu_data->type = CPU_SH4_202; 149 current_cpu_data.type = CPU_SH4_202;
151 cpu_data->icache.ways = 2; 150 current_cpu_data.icache.ways = 2;
152 cpu_data->dcache.ways = 2; 151 current_cpu_data.dcache.ways = 2;
153 cpu_data->flags |= CPU_HAS_FPU; 152 current_cpu_data.flags |= CPU_HAS_FPU;
154 break; 153 break;
155 case 0x500 ... 0x501: 154 case 0x500 ... 0x501:
156 switch (prr) { 155 switch (prr) {
157 case 0x10: 156 case 0x10:
158 cpu_data->type = CPU_SH7750R; 157 current_cpu_data.type = CPU_SH7750R;
159 break; 158 break;
160 case 0x11: 159 case 0x11:
161 cpu_data->type = CPU_SH7751R; 160 current_cpu_data.type = CPU_SH7751R;
162 break; 161 break;
163 case 0x50 ... 0x5f: 162 case 0x50 ... 0x5f:
164 cpu_data->type = CPU_SH7760; 163 current_cpu_data.type = CPU_SH7760;
165 break; 164 break;
166 } 165 }
167 166
168 cpu_data->icache.ways = 2; 167 current_cpu_data.icache.ways = 2;
169 cpu_data->dcache.ways = 2; 168 current_cpu_data.dcache.ways = 2;
170 169
171 cpu_data->flags |= CPU_HAS_FPU; 170 current_cpu_data.flags |= CPU_HAS_FPU;
172 171
173 break; 172 break;
174 default: 173 default:
175 cpu_data->type = CPU_SH_NONE; 174 current_cpu_data.type = CPU_SH_NONE;
176 break; 175 break;
177 } 176 }
178 177
179#ifdef CONFIG_SH_DIRECT_MAPPED 178#ifdef CONFIG_SH_DIRECT_MAPPED
180 cpu_data->icache.ways = 1; 179 current_cpu_data.icache.ways = 1;
181 cpu_data->dcache.ways = 1; 180 current_cpu_data.dcache.ways = 1;
181#endif
182
183#ifdef CONFIG_CPU_HAS_PTEA
184 current_cpu_data.flags |= CPU_HAS_PTEA;
182#endif 185#endif
183 186
184 /* 187 /*
185 * On anything that's not a direct-mapped cache, look to the CVR 188 * On anything that's not a direct-mapped cache, look to the CVR
186 * for I/D-cache specifics. 189 * for I/D-cache specifics.
187 */ 190 */
188 if (cpu_data->icache.ways > 1) { 191 if (current_cpu_data.icache.ways > 1) {
189 size = sizes[(cvr >> 20) & 0xf]; 192 size = sizes[(cvr >> 20) & 0xf];
190 cpu_data->icache.way_incr = (size >> 1); 193 current_cpu_data.icache.way_incr = (size >> 1);
191 cpu_data->icache.sets = (size >> 6); 194 current_cpu_data.icache.sets = (size >> 6);
192 195
193 } 196 }
194 197
195 /* Setup the rest of the I-cache info */ 198 /* Setup the rest of the I-cache info */
196 cpu_data->icache.entry_mask = cpu_data->icache.way_incr - 199 current_cpu_data.icache.entry_mask = current_cpu_data.icache.way_incr -
197 cpu_data->icache.linesz; 200 current_cpu_data.icache.linesz;
198 201
199 cpu_data->icache.way_size = cpu_data->icache.sets * 202 current_cpu_data.icache.way_size = current_cpu_data.icache.sets *
200 cpu_data->icache.linesz; 203 current_cpu_data.icache.linesz;
201 204
202 /* And the rest of the D-cache */ 205 /* And the rest of the D-cache */
203 if (cpu_data->dcache.ways > 1) { 206 if (current_cpu_data.dcache.ways > 1) {
204 size = sizes[(cvr >> 16) & 0xf]; 207 size = sizes[(cvr >> 16) & 0xf];
205 cpu_data->dcache.way_incr = (size >> 1); 208 current_cpu_data.dcache.way_incr = (size >> 1);
206 cpu_data->dcache.sets = (size >> 6); 209 current_cpu_data.dcache.sets = (size >> 6);
207 } 210 }
208 211
209 cpu_data->dcache.entry_mask = cpu_data->dcache.way_incr - 212 current_cpu_data.dcache.entry_mask = current_cpu_data.dcache.way_incr -
210 cpu_data->dcache.linesz; 213 current_cpu_data.dcache.linesz;
211 214
212 cpu_data->dcache.way_size = cpu_data->dcache.sets * 215 current_cpu_data.dcache.way_size = current_cpu_data.dcache.sets *
213 cpu_data->dcache.linesz; 216 current_cpu_data.dcache.linesz;
214 217
215 /* 218 /*
216 * Setup the L2 cache desc 219 * Setup the L2 cache desc
217 * 220 *
218 * SH-4A's have an optional PIPT L2. 221 * SH-4A's have an optional PIPT L2.
219 */ 222 */
220 if (cpu_data->flags & CPU_HAS_L2_CACHE) { 223 if (current_cpu_data.flags & CPU_HAS_L2_CACHE) {
221 /* 224 /*
222 * Size calculation is much more sensible 225 * Size calculation is much more sensible
223 * than it is for the L1. 226 * than it is for the L1.
@@ -228,16 +231,22 @@ int __init detect_cpu_and_cache_system(void)
228 231
229 BUG_ON(!size); 232 BUG_ON(!size);
230 233
231 cpu_data->scache.way_incr = (1 << 16); 234 current_cpu_data.scache.way_incr = (1 << 16);
232 cpu_data->scache.entry_shift = 5; 235 current_cpu_data.scache.entry_shift = 5;
233 cpu_data->scache.ways = 4; 236 current_cpu_data.scache.ways = 4;
234 cpu_data->scache.linesz = L1_CACHE_BYTES; 237 current_cpu_data.scache.linesz = L1_CACHE_BYTES;
235 cpu_data->scache.entry_mask = 238
236 (cpu_data->scache.way_incr - cpu_data->scache.linesz); 239 current_cpu_data.scache.entry_mask =
237 cpu_data->scache.sets = size / 240 (current_cpu_data.scache.way_incr -
238 (cpu_data->scache.linesz * cpu_data->scache.ways); 241 current_cpu_data.scache.linesz);
239 cpu_data->scache.way_size = 242
240 (cpu_data->scache.sets * cpu_data->scache.linesz); 243 current_cpu_data.scache.sets = size /
244 (current_cpu_data.scache.linesz *
245 current_cpu_data.scache.ways);
246
247 current_cpu_data.scache.way_size =
248 (current_cpu_data.scache.sets *
249 current_cpu_data.scache.linesz);
241 } 250 }
242 251
243 return 0; 252 return 0;