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29440a2b BS |
1 | /* |
2 | * Blackfin CPLB initialization | |
3 | * | |
4 | * Copyright 2004-2007 Analog Devices Inc. | |
5 | * | |
6 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, see the file COPYING, or write | |
20 | * to the Free Software Foundation, Inc., | |
21 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | */ | |
38316382 | 23 | |
29440a2b BS |
24 | #include <linux/module.h> |
25 | ||
26 | #include <asm/blackfin.h> | |
04be80ef | 27 | #include <asm/cacheflush.h> |
3bebca2d | 28 | #include <asm/cplb.h> |
29440a2b | 29 | #include <asm/cplbinit.h> |
dbc895f9 | 30 | #include <asm/mem_map.h> |
29440a2b | 31 | |
b8a98989 GY |
32 | u_long icplb_tables[NR_CPUS][CPLB_TBL_ENTRIES+1]; |
33 | u_long dcplb_tables[NR_CPUS][CPLB_TBL_ENTRIES+1]; | |
29440a2b BS |
34 | |
35 | #ifdef CONFIG_CPLB_SWITCH_TAB_L1 | |
b8a98989 | 36 | #define PDT_ATTR __attribute__((l1_data)) |
29440a2b | 37 | #else |
b8a98989 | 38 | #define PDT_ATTR |
81a487a5 | 39 | #endif |
29440a2b | 40 | |
b8a98989 GY |
41 | u_long ipdt_tables[NR_CPUS][MAX_SWITCH_I_CPLBS+1] PDT_ATTR; |
42 | u_long dpdt_tables[NR_CPUS][MAX_SWITCH_D_CPLBS+1] PDT_ATTR; | |
29440a2b | 43 | #ifdef CONFIG_CPLB_INFO |
b8a98989 GY |
44 | u_long ipdt_swapcount_tables[NR_CPUS][MAX_SWITCH_I_CPLBS] PDT_ATTR; |
45 | u_long dpdt_swapcount_tables[NR_CPUS][MAX_SWITCH_D_CPLBS] PDT_ATTR; | |
81a487a5 | 46 | #endif |
29440a2b BS |
47 | |
48 | struct s_cplb { | |
49 | struct cplb_tab init_i; | |
50 | struct cplb_tab init_d; | |
51 | struct cplb_tab switch_i; | |
52 | struct cplb_tab switch_d; | |
53 | }; | |
54 | ||
3bebca2d | 55 | #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE) |
29440a2b BS |
56 | static struct cplb_desc cplb_data[] = { |
57 | { | |
58 | .start = 0, | |
59 | .end = SIZE_1K, | |
60 | .psize = SIZE_1K, | |
61 | .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB, | |
62 | .i_conf = SDRAM_OOPS, | |
63 | .d_conf = SDRAM_OOPS, | |
64 | #if defined(CONFIG_DEBUG_HUNT_FOR_ZERO) | |
65 | .valid = 1, | |
66 | #else | |
67 | .valid = 0, | |
68 | #endif | |
c3a9f435 | 69 | .name = "Zero Pointer Guard Page", |
29440a2b BS |
70 | }, |
71 | { | |
b8a98989 GY |
72 | .start = 0, /* dyanmic */ |
73 | .end = 0, /* dynamic */ | |
29440a2b BS |
74 | .psize = SIZE_4M, |
75 | .attr = INITIAL_T | SWITCH_T | I_CPLB, | |
76 | .i_conf = L1_IMEMORY, | |
77 | .d_conf = 0, | |
78 | .valid = 1, | |
79 | .name = "L1 I-Memory", | |
80 | }, | |
81 | { | |
b8a98989 GY |
82 | .start = 0, /* dynamic */ |
83 | .end = 0, /* dynamic */ | |
29440a2b BS |
84 | .psize = SIZE_4M, |
85 | .attr = INITIAL_T | SWITCH_T | D_CPLB, | |
86 | .i_conf = 0, | |
87 | .d_conf = L1_DMEMORY, | |
88 | #if ((L1_DATA_A_LENGTH > 0) || (L1_DATA_B_LENGTH > 0)) | |
89 | .valid = 1, | |
90 | #else | |
91 | .valid = 0, | |
92 | #endif | |
93 | .name = "L1 D-Memory", | |
94 | }, | |
b8a98989 GY |
95 | { |
96 | .start = L2_START, | |
97 | .end = L2_START + L2_LENGTH, | |
98 | .psize = SIZE_1M, | |
99 | .attr = L2_ATTR, | |
100 | .i_conf = L2_IMEMORY, | |
101 | .d_conf = L2_DMEMORY, | |
102 | .valid = (L2_LENGTH > 0), | |
103 | .name = "L2 Memory", | |
104 | }, | |
29440a2b BS |
105 | { |
106 | .start = 0, | |
107 | .end = 0, /* dynamic */ | |
108 | .psize = 0, | |
109 | .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB, | |
c3a9f435 MF |
110 | .i_conf = SDRAM_IGENERIC, |
111 | .d_conf = SDRAM_DGENERIC, | |
29440a2b | 112 | .valid = 1, |
c3a9f435 | 113 | .name = "Kernel Memory", |
29440a2b BS |
114 | }, |
115 | { | |
116 | .start = 0, /* dynamic */ | |
117 | .end = 0, /* dynamic */ | |
118 | .psize = 0, | |
119 | .attr = INITIAL_T | SWITCH_T | D_CPLB, | |
c3a9f435 MF |
120 | .i_conf = SDRAM_IGENERIC, |
121 | .d_conf = SDRAM_DNON_CHBL, | |
29440a2b | 122 | .valid = 1, |
c3a9f435 | 123 | .name = "uClinux MTD Memory", |
29440a2b BS |
124 | }, |
125 | { | |
126 | .start = 0, /* dynamic */ | |
127 | .end = 0, /* dynamic */ | |
128 | .psize = SIZE_1M, | |
129 | .attr = INITIAL_T | SWITCH_T | D_CPLB, | |
130 | .d_conf = SDRAM_DNON_CHBL, | |
131 | .valid = 1, | |
c3a9f435 | 132 | .name = "Uncached DMA Zone", |
29440a2b BS |
133 | }, |
134 | { | |
135 | .start = 0, /* dynamic */ | |
136 | .end = 0, /* dynamic */ | |
137 | .psize = 0, | |
138 | .attr = SWITCH_T | D_CPLB, | |
139 | .i_conf = 0, /* dynamic */ | |
140 | .d_conf = 0, /* dynamic */ | |
141 | .valid = 1, | |
c3a9f435 | 142 | .name = "Reserved Memory", |
29440a2b BS |
143 | }, |
144 | { | |
145 | .start = ASYNC_BANK0_BASE, | |
146 | .end = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE, | |
147 | .psize = 0, | |
148 | .attr = SWITCH_T | D_CPLB, | |
149 | .d_conf = SDRAM_EBIU, | |
150 | .valid = 1, | |
c3a9f435 | 151 | .name = "Asynchronous Memory Banks", |
29440a2b | 152 | }, |
c3a9f435 MF |
153 | { |
154 | .start = BOOT_ROM_START, | |
155 | .end = BOOT_ROM_START + BOOT_ROM_LENGTH, | |
156 | .psize = SIZE_1M, | |
157 | .attr = SWITCH_T | I_CPLB | D_CPLB, | |
158 | .i_conf = SDRAM_IGENERIC, | |
159 | .d_conf = SDRAM_DGENERIC, | |
160 | .valid = 1, | |
161 | .name = "On-Chip BootROM", | |
162 | }, | |
29440a2b BS |
163 | }; |
164 | ||
4c5b8a64 | 165 | static bool __init lock_kernel_check(u32 start, u32 end) |
29440a2b | 166 | { |
05a717fb | 167 | if (start >= (u32)__init_begin || end <= (u32)_stext) |
4c5b8a64 | 168 | return false; |
6776cf44 GY |
169 | |
170 | /* This cplb block overlapped with kernel area. */ | |
4c5b8a64 | 171 | return true; |
29440a2b BS |
172 | } |
173 | ||
38316382 | 174 | static void __init |
29440a2b BS |
175 | fill_cplbtab(struct cplb_tab *table, |
176 | unsigned long start, unsigned long end, | |
177 | unsigned long block_size, unsigned long cplb_data) | |
178 | { | |
179 | int i; | |
180 | ||
181 | switch (block_size) { | |
182 | case SIZE_4M: | |
183 | i = 3; | |
184 | break; | |
185 | case SIZE_1M: | |
186 | i = 2; | |
187 | break; | |
188 | case SIZE_4K: | |
189 | i = 1; | |
190 | break; | |
191 | case SIZE_1K: | |
192 | default: | |
193 | i = 0; | |
194 | break; | |
195 | } | |
196 | ||
197 | cplb_data = (cplb_data & ~(3 << 16)) | (i << 16); | |
198 | ||
199 | while ((start < end) && (table->pos < table->size)) { | |
200 | ||
201 | table->tab[table->pos++] = start; | |
202 | ||
4c5b8a64 | 203 | if (lock_kernel_check(start, start + block_size)) |
29440a2b BS |
204 | table->tab[table->pos++] = |
205 | cplb_data | CPLB_LOCK | CPLB_DIRTY; | |
206 | else | |
207 | table->tab[table->pos++] = cplb_data; | |
208 | ||
209 | start += block_size; | |
210 | } | |
29440a2b BS |
211 | } |
212 | ||
38316382 | 213 | static void __init close_cplbtab(struct cplb_tab *table) |
29440a2b | 214 | { |
38316382 | 215 | while (table->pos < table->size) |
29440a2b | 216 | table->tab[table->pos++] = 0; |
29440a2b BS |
217 | } |
218 | ||
219 | /* helper function */ | |
8d0a6003 BW |
220 | static void __init |
221 | __fill_code_cplbtab(struct cplb_tab *t, int i, u32 a_start, u32 a_end) | |
29440a2b BS |
222 | { |
223 | if (cplb_data[i].psize) { | |
224 | fill_cplbtab(t, | |
225 | cplb_data[i].start, | |
226 | cplb_data[i].end, | |
227 | cplb_data[i].psize, | |
228 | cplb_data[i].i_conf); | |
229 | } else { | |
3bebca2d | 230 | #if defined(CONFIG_BFIN_ICACHE) |
1aafd909 | 231 | if (ANOMALY_05000263 && i == SDRAM_KERN) { |
29440a2b BS |
232 | fill_cplbtab(t, |
233 | cplb_data[i].start, | |
234 | cplb_data[i].end, | |
235 | SIZE_4M, | |
236 | cplb_data[i].i_conf); | |
237 | } else | |
238 | #endif | |
239 | { | |
240 | fill_cplbtab(t, | |
241 | cplb_data[i].start, | |
242 | a_start, | |
243 | SIZE_1M, | |
244 | cplb_data[i].i_conf); | |
245 | fill_cplbtab(t, | |
246 | a_start, | |
247 | a_end, | |
248 | SIZE_4M, | |
249 | cplb_data[i].i_conf); | |
250 | fill_cplbtab(t, a_end, | |
251 | cplb_data[i].end, | |
252 | SIZE_1M, | |
253 | cplb_data[i].i_conf); | |
254 | } | |
255 | } | |
256 | } | |
257 | ||
8d0a6003 BW |
258 | static void __init |
259 | __fill_data_cplbtab(struct cplb_tab *t, int i, u32 a_start, u32 a_end) | |
29440a2b BS |
260 | { |
261 | if (cplb_data[i].psize) { | |
262 | fill_cplbtab(t, | |
263 | cplb_data[i].start, | |
264 | cplb_data[i].end, | |
265 | cplb_data[i].psize, | |
266 | cplb_data[i].d_conf); | |
267 | } else { | |
268 | fill_cplbtab(t, | |
269 | cplb_data[i].start, | |
270 | a_start, SIZE_1M, | |
271 | cplb_data[i].d_conf); | |
272 | fill_cplbtab(t, a_start, | |
273 | a_end, SIZE_4M, | |
274 | cplb_data[i].d_conf); | |
275 | fill_cplbtab(t, a_end, | |
276 | cplb_data[i].end, | |
277 | SIZE_1M, | |
278 | cplb_data[i].d_conf); | |
279 | } | |
280 | } | |
281 | ||
b8a98989 | 282 | void __init generate_cplb_tables_cpu(unsigned int cpu) |
29440a2b BS |
283 | { |
284 | ||
285 | u16 i, j, process; | |
286 | u32 a_start, a_end, as, ae, as_1m; | |
287 | ||
288 | struct cplb_tab *t_i = NULL; | |
289 | struct cplb_tab *t_d = NULL; | |
290 | struct s_cplb cplb; | |
291 | ||
8cab0288 MF |
292 | printk(KERN_INFO "NOMPU: setting up cplb tables for global access\n"); |
293 | ||
b8a98989 GY |
294 | cplb.init_i.size = CPLB_TBL_ENTRIES; |
295 | cplb.init_d.size = CPLB_TBL_ENTRIES; | |
29440a2b BS |
296 | cplb.switch_i.size = MAX_SWITCH_I_CPLBS; |
297 | cplb.switch_d.size = MAX_SWITCH_D_CPLBS; | |
298 | ||
299 | cplb.init_i.pos = 0; | |
300 | cplb.init_d.pos = 0; | |
301 | cplb.switch_i.pos = 0; | |
302 | cplb.switch_d.pos = 0; | |
303 | ||
b8a98989 GY |
304 | cplb.init_i.tab = icplb_tables[cpu]; |
305 | cplb.init_d.tab = dcplb_tables[cpu]; | |
306 | cplb.switch_i.tab = ipdt_tables[cpu]; | |
307 | cplb.switch_d.tab = dpdt_tables[cpu]; | |
29440a2b | 308 | |
b8a98989 GY |
309 | cplb_data[L1I_MEM].start = get_l1_code_start_cpu(cpu); |
310 | cplb_data[L1I_MEM].end = cplb_data[L1I_MEM].start + L1_CODE_LENGTH; | |
311 | cplb_data[L1D_MEM].start = get_l1_data_a_start_cpu(cpu); | |
312 | cplb_data[L1D_MEM].end = get_l1_data_b_start_cpu(cpu) + L1_DATA_B_LENGTH; | |
29440a2b BS |
313 | cplb_data[SDRAM_KERN].end = memory_end; |
314 | ||
315 | #ifdef CONFIG_MTD_UCLINUX | |
316 | cplb_data[SDRAM_RAM_MTD].start = memory_mtd_start; | |
317 | cplb_data[SDRAM_RAM_MTD].end = memory_mtd_start + mtd_size; | |
318 | cplb_data[SDRAM_RAM_MTD].valid = mtd_size > 0; | |
319 | # if defined(CONFIG_ROMFS_FS) | |
320 | cplb_data[SDRAM_RAM_MTD].attr |= I_CPLB; | |
321 | ||
322 | /* | |
323 | * The ROMFS_FS size is often not multiple of 1MB. | |
324 | * This can cause multiple CPLB sets covering the same memory area. | |
325 | * This will then cause multiple CPLB hit exceptions. | |
326 | * Workaround: We ensure a contiguous memory area by extending the kernel | |
327 | * memory section over the mtd section. | |
328 | * For ROMFS_FS memory must be covered with ICPLBs anyways. | |
329 | * So there is no difference between kernel and mtd memory setup. | |
330 | */ | |
331 | ||
332 | cplb_data[SDRAM_KERN].end = memory_mtd_start + mtd_size;; | |
333 | cplb_data[SDRAM_RAM_MTD].valid = 0; | |
334 | ||
335 | # endif | |
336 | #else | |
337 | cplb_data[SDRAM_RAM_MTD].valid = 0; | |
338 | #endif | |
339 | ||
340 | cplb_data[SDRAM_DMAZ].start = _ramend - DMA_UNCACHED_REGION; | |
341 | cplb_data[SDRAM_DMAZ].end = _ramend; | |
342 | ||
343 | cplb_data[RES_MEM].start = _ramend; | |
344 | cplb_data[RES_MEM].end = physical_mem_end; | |
345 | ||
346 | if (reserved_mem_dcache_on) | |
347 | cplb_data[RES_MEM].d_conf = SDRAM_DGENERIC; | |
348 | else | |
349 | cplb_data[RES_MEM].d_conf = SDRAM_DNON_CHBL; | |
350 | ||
351 | if (reserved_mem_icache_on) | |
352 | cplb_data[RES_MEM].i_conf = SDRAM_IGENERIC; | |
353 | else | |
354 | cplb_data[RES_MEM].i_conf = SDRAM_INON_CHBL; | |
355 | ||
c3a9f435 | 356 | for (i = ZERO_P; i < ARRAY_SIZE(cplb_data); ++i) { |
29440a2b BS |
357 | if (!cplb_data[i].valid) |
358 | continue; | |
359 | ||
360 | as_1m = cplb_data[i].start % SIZE_1M; | |
361 | ||
362 | /* We need to make sure all sections are properly 1M aligned | |
363 | * However between Kernel Memory and the Kernel mtd section, depending on the | |
364 | * rootfs size, there can be overlapping memory areas. | |
365 | */ | |
366 | ||
367 | if (as_1m && i != L1I_MEM && i != L1D_MEM) { | |
368 | #ifdef CONFIG_MTD_UCLINUX | |
369 | if (i == SDRAM_RAM_MTD) { | |
370 | if ((cplb_data[SDRAM_KERN].end + 1) > cplb_data[SDRAM_RAM_MTD].start) | |
371 | cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M)) + SIZE_1M; | |
372 | else | |
373 | cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M)); | |
374 | } else | |
375 | #endif | |
376 | printk(KERN_WARNING "Unaligned Start of %s at 0x%X\n", | |
377 | cplb_data[i].name, cplb_data[i].start); | |
378 | } | |
379 | ||
380 | as = cplb_data[i].start % SIZE_4M; | |
381 | ae = cplb_data[i].end % SIZE_4M; | |
382 | ||
383 | if (as) | |
384 | a_start = cplb_data[i].start + (SIZE_4M - (as)); | |
385 | else | |
386 | a_start = cplb_data[i].start; | |
387 | ||
388 | a_end = cplb_data[i].end - ae; | |
389 | ||
390 | for (j = INITIAL_T; j <= SWITCH_T; j++) { | |
391 | ||
392 | switch (j) { | |
393 | case INITIAL_T: | |
394 | if (cplb_data[i].attr & INITIAL_T) { | |
395 | t_i = &cplb.init_i; | |
396 | t_d = &cplb.init_d; | |
397 | process = 1; | |
398 | } else | |
399 | process = 0; | |
400 | break; | |
401 | case SWITCH_T: | |
402 | if (cplb_data[i].attr & SWITCH_T) { | |
403 | t_i = &cplb.switch_i; | |
404 | t_d = &cplb.switch_d; | |
405 | process = 1; | |
406 | } else | |
407 | process = 0; | |
408 | break; | |
409 | default: | |
410 | process = 0; | |
411 | break; | |
412 | } | |
413 | ||
414 | if (!process) | |
415 | continue; | |
416 | if (cplb_data[i].attr & I_CPLB) | |
417 | __fill_code_cplbtab(t_i, i, a_start, a_end); | |
418 | ||
419 | if (cplb_data[i].attr & D_CPLB) | |
420 | __fill_data_cplbtab(t_d, i, a_start, a_end); | |
421 | } | |
422 | } | |
423 | ||
dce783c5 MF |
424 | /* make sure we locked the kernel start */ |
425 | BUG_ON(cplb.init_i.pos < 2 + cplb_data[ZERO_P].valid); | |
426 | BUG_ON(cplb.init_d.pos < 1 + cplb_data[ZERO_P].valid + cplb_data[L1D_MEM].valid); | |
427 | ||
428 | /* make sure we didnt overflow the table */ | |
2eddbada MF |
429 | BUG_ON(cplb.init_i.size < cplb.init_i.pos); |
430 | BUG_ON(cplb.init_d.size < cplb.init_d.pos); | |
431 | BUG_ON(cplb.switch_i.size < cplb.switch_i.pos); | |
432 | BUG_ON(cplb.switch_d.size < cplb.switch_d.pos); | |
29440a2b | 433 | |
dce783c5 | 434 | /* close tables */ |
29440a2b BS |
435 | close_cplbtab(&cplb.init_i); |
436 | close_cplbtab(&cplb.init_d); | |
437 | ||
438 | cplb.init_i.tab[cplb.init_i.pos] = -1; | |
439 | cplb.init_d.tab[cplb.init_d.pos] = -1; | |
440 | cplb.switch_i.tab[cplb.switch_i.pos] = -1; | |
441 | cplb.switch_d.tab[cplb.switch_d.pos] = -1; | |
442 | ||
443 | } | |
29440a2b | 444 | |
38316382 | 445 | #endif |