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[POWERPC] Use menuconfig objects II - Macintosh
[wrt350n-kernel.git] / drivers / mtd / nand / cafe_ecc.c
blobea5c8491d2c57677250b012f1d9261494cead565
1 /* Error correction for CAFÉ NAND controller
2 *
3 * © 2006 Marvell, Inc.
4 * Author: Tom Chiou
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc., 59
18 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/errno.h>
24
25 static unsigned short gf4096_mul(unsigned short, unsigned short);
26 static unsigned short gf64_mul(unsigned short, unsigned short);
27 static unsigned short gf4096_inv(unsigned short);
28 static unsigned short err_pos(unsigned short);
29 static void find_4bit_err_coefs(unsigned short, unsigned short, unsigned short,
30 unsigned short, unsigned short, unsigned short,
31 unsigned short, unsigned short, unsigned short *);
32 static void zero_4x5_col3(unsigned short[4][5]);
33 static void zero_4x5_col2(unsigned short[4][5]);
34 static void zero_4x5_col1(unsigned short[4][5]);
35 static void swap_4x5_rows(unsigned short[4][5], int, int, int);
36 static void swap_2x3_rows(unsigned short m[2][3]);
37 static void solve_4x5(unsigned short m[4][5], unsigned short *, int *);
38 static void sort_coefs(int *, unsigned short *, int);
39 static void find_4bit_err_pats(unsigned short, unsigned short, unsigned short,
40 unsigned short, unsigned short, unsigned short,
41 unsigned short, unsigned short, unsigned short *);
42 static void find_3bit_err_coefs(unsigned short, unsigned short, unsigned short,
43 unsigned short, unsigned short, unsigned short,
44 unsigned short *);
45 static void zero_3x4_col2(unsigned short[3][4]);
46 static void zero_3x4_col1(unsigned short[3][4]);
47 static void swap_3x4_rows(unsigned short[3][4], int, int, int);
48 static void solve_3x4(unsigned short[3][4], unsigned short *, int *);
49 static void find_3bit_err_pats(unsigned short, unsigned short, unsigned short,
50 unsigned short, unsigned short, unsigned short,
51 unsigned short *);
52
53 static void find_2bit_err_pats(unsigned short, unsigned short, unsigned short,
54 unsigned short, unsigned short *);
55 static void find_2x2_soln(unsigned short, unsigned short, unsigned short,
56 unsigned short, unsigned short, unsigned short,
57 unsigned short *);
58 static void solve_2x3(unsigned short[2][3], unsigned short *);
59 static int chk_no_err_only(unsigned short *, unsigned short *);
60 static int chk_1_err_only(unsigned short *, unsigned short *);
61 static int chk_2_err_only(unsigned short *, unsigned short *);
62 static int chk_3_err_only(unsigned short *, unsigned short *);
63 static int chk_4_err_only(unsigned short *, unsigned short *);
64
65 static unsigned short gf64_mul(unsigned short a, unsigned short b)
66 {
67 unsigned short tmp1, tmp2, tmp3, tmp4, tmp5;
68 unsigned short c_bit0, c_bit1, c_bit2, c_bit3, c_bit4, c_bit5, c;
69
70 tmp1 = ((a) ^ (a >> 5));
71 tmp2 = ((a >> 4) ^ (a >> 5));
72 tmp3 = ((a >> 3) ^ (a >> 4));
73 tmp4 = ((a >> 2) ^ (a >> 3));
74 tmp5 = ((a >> 1) ^ (a >> 2));
75
76 c_bit0 = ((a & b) ^ ((a >> 5) & (b >> 1)) ^ ((a >> 4) & (b >> 2)) ^
77 ((a >> 3) & (b >> 3)) ^ ((a >> 2) & (b >> 4)) ^ ((a >> 1) & (b >> 5))) & 0x1;
78
79 c_bit1 = (((a >> 1) & b) ^ (tmp1 & (b >> 1)) ^ (tmp2 & (b >> 2)) ^
80 (tmp3 & (b >> 3)) ^ (tmp4 & (b >> 4)) ^ (tmp5 & (b >> 5))) & 0x1;
81
82 c_bit2 = (((a >> 2) & b) ^ ((a >> 1) & (b >> 1)) ^ (tmp1 & (b >> 2)) ^
83 (tmp2 & (b >> 3)) ^ (tmp3 & (b >> 4)) ^ (tmp4 & (b >> 5))) & 0x1;
84
85 c_bit3 = (((a >> 3) & b) ^ ((a >> 2) & (b >> 1)) ^ ((a >> 1) & (b >> 2)) ^
86 (tmp1 & (b >> 3)) ^ (tmp2 & (b >> 4)) ^ (tmp3 & (b >> 5))) & 0x1;
87
88 c_bit4 = (((a >> 4) & b) ^ ((a >> 3) & (b >> 1)) ^ ((a >> 2) & (b >> 2)) ^
89 ((a >> 1) & (b >> 3)) ^ (tmp1 & (b >> 4)) ^ (tmp2 & (b >> 5))) & 0x1;
90
91 c_bit5 = (((a >> 5) & b) ^ ((a >> 4) & (b >> 1)) ^ ((a >> 3) & (b >> 2)) ^
92 ((a >> 2) & (b >> 3)) ^ ((a >> 1) & (b >> 4)) ^ (tmp1 & (b >> 5))) & 0x1;
93
94 c = c_bit0 | (c_bit1 << 1) | (c_bit2 << 2) | (c_bit3 << 3) | (c_bit4 << 4) | (c_bit5 << 5);
95
96 return c;
97 }
98
99 static unsigned short gf4096_mul(unsigned short a, unsigned short b)
100 {
101 unsigned short ah, al, bh, bl, alxah, blxbh, ablh, albl, ahbh, ahbhB, c;
102
103 ah = (a >> 6) & 0x3f;
104 al = a & 0x3f;
105 bh = (b >> 6) & 0x3f;
106 bl = b & 0x3f;
107 alxah = al ^ ah;
108 blxbh = bl ^ bh;
109
110 ablh = gf64_mul(alxah, blxbh);
111 albl = gf64_mul(al, bl);
112 ahbh = gf64_mul(ah, bh);
113
114 ahbhB = ((ahbh & 0x1) << 5) |
115 ((ahbh & 0x20) >> 1) |
116 ((ahbh & 0x10) >> 1) | ((ahbh & 0x8) >> 1) | ((ahbh & 0x4) >> 1) | (((ahbh >> 1) ^ ahbh) & 0x1);
117
118 c = ((ablh ^ albl) << 6) | (ahbhB ^ albl);
119 return c;
120 }
121
122 static void find_2bit_err_pats(unsigned short s0, unsigned short s1, unsigned short r0, unsigned short r1, unsigned short *pats)
123 {
124 find_2x2_soln(0x1, 0x1, r0, r1, s0, s1, pats);
125 }
126
127 static void find_3bit_err_coefs(unsigned short s0, unsigned short s1,
128 unsigned short s2, unsigned short s3, unsigned short s4, unsigned short s5, unsigned short *coefs)
129 {
130 unsigned short m[3][4];
131 int row_order[3];
132
133 row_order[0] = 0;
134 row_order[1] = 1;
135 row_order[2] = 2;
136 m[0][0] = s2;
137 m[0][1] = s1;
138 m[0][2] = s0;
139 m[0][3] = s3;
140 m[1][0] = s3;
141 m[1][1] = s2;
142 m[1][2] = s1;
143 m[1][3] = s4;
144 m[2][0] = s4;
145 m[2][1] = s3;
146 m[2][2] = s2;
147 m[2][3] = s5;
148
149 if (m[0][2] != 0x0) {
150 zero_3x4_col2(m);
151 } else if (m[1][2] != 0x0) {
152 swap_3x4_rows(m, 0, 1, 4);
153 zero_3x4_col2(m);
154 } else if (m[2][2] != 0x0) {
155 swap_3x4_rows(m, 0, 2, 4);
156 zero_3x4_col2(m);
157 } else {
158 printk(KERN_ERR "Error: find_3bit_err_coefs, s0,s1,s2 all zeros!\n");
159 }
160
161 if (m[1][1] != 0x0) {
162 zero_3x4_col1(m);
163 } else if (m[2][1] != 0x0) {
164 swap_3x4_rows(m, 1, 2, 4);
165 zero_3x4_col1(m);
166 } else {
167 printk(KERN_ERR "Error: find_3bit_err_coefs, cannot resolve col 1!\n");
168 }
169
170 /* solve coefs */
171 solve_3x4(m, coefs, row_order);
172 }
173
174 static void zero_3x4_col2(unsigned short m[3][4])
175 {
176 unsigned short minv1, minv2;
177
178 minv1 = gf4096_mul(m[1][2], gf4096_inv(m[0][2]));
179 minv2 = gf4096_mul(m[2][2], gf4096_inv(m[0][2]));
180 m[1][0] = m[1][0] ^ gf4096_mul(m[0][0], minv1);
181 m[1][1] = m[1][1] ^ gf4096_mul(m[0][1], minv1);
182 m[1][3] = m[1][3] ^ gf4096_mul(m[0][3], minv1);
183 m[2][0] = m[2][0] ^ gf4096_mul(m[0][0], minv2);
184 m[2][1] = m[2][1] ^ gf4096_mul(m[0][1], minv2);
185 m[2][3] = m[2][3] ^ gf4096_mul(m[0][3], minv2);
186 }
187
188 static void zero_3x4_col1(unsigned short m[3][4])
189 {
190 unsigned short minv;
191 minv = gf4096_mul(m[2][1], gf4096_inv(m[1][1]));
192 m[2][0] = m[2][0] ^ gf4096_mul(m[1][0], minv);
193 m[2][3] = m[2][3] ^ gf4096_mul(m[1][3], minv);
194 }
195
196 static void swap_3x4_rows(unsigned short m[3][4], int i, int j, int col_width)
197 {
198 unsigned short tmp0;
199 int cnt;
200 for (cnt = 0; cnt < col_width; cnt++) {
201 tmp0 = m[i][cnt];
202 m[i][cnt] = m[j][cnt];
203 m[j][cnt] = tmp0;
204 }
205 }
206
207 static void solve_3x4(unsigned short m[3][4], unsigned short *coefs, int *row_order)
208 {
209 unsigned short tmp[3];
210 tmp[0] = gf4096_mul(m[2][3], gf4096_inv(m[2][0]));
211 tmp[1] = gf4096_mul((gf4096_mul(tmp[0], m[1][0]) ^ m[1][3]), gf4096_inv(m[1][1]));
212 tmp[2] = gf4096_mul((gf4096_mul(tmp[0], m[0][0]) ^ gf4096_mul(tmp[1], m[0][1]) ^ m[0][3]), gf4096_inv(m[0][2]));
213 sort_coefs(row_order, tmp, 3);
214 coefs[0] = tmp[0];
215 coefs[1] = tmp[1];
216 coefs[2] = tmp[2];
217 }
218
219 static void find_3bit_err_pats(unsigned short s0, unsigned short s1,
220 unsigned short s2, unsigned short r0,
221 unsigned short r1, unsigned short r2,
222 unsigned short *pats)
223 {
224 find_2x2_soln(r0 ^ r2, r1 ^ r2,
225 gf4096_mul(r0, r0 ^ r2), gf4096_mul(r1, r1 ^ r2),
226 gf4096_mul(s0, r2) ^ s1, gf4096_mul(s1, r2) ^ s2, pats);
227 pats[2] = s0 ^ pats[0] ^ pats[1];
228 }
229
230 static void find_4bit_err_coefs(unsigned short s0, unsigned short s1,
231 unsigned short s2, unsigned short s3,
232 unsigned short s4, unsigned short s5,
233 unsigned short s6, unsigned short s7,
234 unsigned short *coefs)
235 {
236 unsigned short m[4][5];
237 int row_order[4];
238
239 row_order[0] = 0;
240 row_order[1] = 1;
241 row_order[2] = 2;
242 row_order[3] = 3;
243
244 m[0][0] = s3;
245 m[0][1] = s2;
246 m[0][2] = s1;
247 m[0][3] = s0;
248 m[0][4] = s4;
249 m[1][0] = s4;
250 m[1][1] = s3;
251 m[1][2] = s2;
252 m[1][3] = s1;
253 m[1][4] = s5;
254 m[2][0] = s5;
255 m[2][1] = s4;
256 m[2][2] = s3;
257 m[2][3] = s2;
258 m[2][4] = s6;
259 m[3][0] = s6;
260 m[3][1] = s5;
261 m[3][2] = s4;
262 m[3][3] = s3;
263 m[3][4] = s7;
264
265 if (m[0][3] != 0x0) {
266 zero_4x5_col3(m);
267 } else if (m[1][3] != 0x0) {
268 swap_4x5_rows(m, 0, 1, 5);
269 zero_4x5_col3(m);
270 } else if (m[2][3] != 0x0) {
271 swap_4x5_rows(m, 0, 2, 5);
272 zero_4x5_col3(m);
273 } else if (m[3][3] != 0x0) {
274 swap_4x5_rows(m, 0, 3, 5);
275 zero_4x5_col3(m);
276 } else {
277 printk(KERN_ERR "Error: find_4bit_err_coefs, s0,s1,s2,s3 all zeros!\n");
278 }
279
280 if (m[1][2] != 0x0) {
281 zero_4x5_col2(m);
282 } else if (m[2][2] != 0x0) {
283 swap_4x5_rows(m, 1, 2, 5);
284 zero_4x5_col2(m);
285 } else if (m[3][2] != 0x0) {
286 swap_4x5_rows(m, 1, 3, 5);
287 zero_4x5_col2(m);
288 } else {
289 printk(KERN_ERR "Error: find_4bit_err_coefs, cannot resolve col 2!\n");
290 }
291
292 if (m[2][1] != 0x0) {
293 zero_4x5_col1(m);
294 } else if (m[3][1] != 0x0) {
295 swap_4x5_rows(m, 2, 3, 5);
296 zero_4x5_col1(m);
297 } else {
298 printk(KERN_ERR "Error: find_4bit_err_coefs, cannot resolve col 1!\n");
299 }
300
301 solve_4x5(m, coefs, row_order);
302 }
303
304 static void zero_4x5_col3(unsigned short m[4][5])
305 {
306 unsigned short minv1, minv2, minv3;
307
308 minv1 = gf4096_mul(m[1][3], gf4096_inv(m[0][3]));
309 minv2 = gf4096_mul(m[2][3], gf4096_inv(m[0][3]));
310 minv3 = gf4096_mul(m[3][3], gf4096_inv(m[0][3]));
311
312 m[1][0] = m[1][0] ^ gf4096_mul(m[0][0], minv1);
313 m[1][1] = m[1][1] ^ gf4096_mul(m[0][1], minv1);
314 m[1][2] = m[1][2] ^ gf4096_mul(m[0][2], minv1);
315 m[1][4] = m[1][4] ^ gf4096_mul(m[0][4], minv1);
316 m[2][0] = m[2][0] ^ gf4096_mul(m[0][0], minv2);
317 m[2][1] = m[2][1] ^ gf4096_mul(m[0][1], minv2);
318 m[2][2] = m[2][2] ^ gf4096_mul(m[0][2], minv2);
319 m[2][4] = m[2][4] ^ gf4096_mul(m[0][4], minv2);
320 m[3][0] = m[3][0] ^ gf4096_mul(m[0][0], minv3);
321 m[3][1] = m[3][1] ^ gf4096_mul(m[0][1], minv3);
322 m[3][2] = m[3][2] ^ gf4096_mul(m[0][2], minv3);
323 m[3][4] = m[3][4] ^ gf4096_mul(m[0][4], minv3);
324 }
325
326 static void zero_4x5_col2(unsigned short m[4][5])
327 {
328 unsigned short minv2, minv3;
329
330 minv2 = gf4096_mul(m[2][2], gf4096_inv(m[1][2]));
331 minv3 = gf4096_mul(m[3][2], gf4096_inv(m[1][2]));
332
333 m[2][0] = m[2][0] ^ gf4096_mul(m[1][0], minv2);
334 m[2][1] = m[2][1] ^ gf4096_mul(m[1][1], minv2);
335 m[2][4] = m[2][4] ^ gf4096_mul(m[1][4], minv2);
336 m[3][0] = m[3][0] ^ gf4096_mul(m[1][0], minv3);
337 m[3][1] = m[3][1] ^ gf4096_mul(m[1][1], minv3);
338 m[3][4] = m[3][4] ^ gf4096_mul(m[1][4], minv3);
339 }
340
341 static void zero_4x5_col1(unsigned short m[4][5])
342 {
343 unsigned short minv;
344
345 minv = gf4096_mul(m[3][1], gf4096_inv(m[2][1]));
346
347 m[3][0] = m[3][0] ^ gf4096_mul(m[2][0], minv);
348 m[3][4] = m[3][4] ^ gf4096_mul(m[2][4], minv);
349 }
350
351 static void swap_4x5_rows(unsigned short m[4][5], int i, int j, int col_width)
352 {
353 unsigned short tmp0;
354 int cnt;
355
356 for (cnt = 0; cnt < col_width; cnt++) {
357 tmp0 = m[i][cnt];
358 m[i][cnt] = m[j][cnt];
359 m[j][cnt] = tmp0;
360 }
361 }
362
363 static void solve_4x5(unsigned short m[4][5], unsigned short *coefs, int *row_order)
364 {
365 unsigned short tmp[4];
366
367 tmp[0] = gf4096_mul(m[3][4], gf4096_inv(m[3][0]));
368 tmp[1] = gf4096_mul((gf4096_mul(tmp[0], m[2][0]) ^ m[2][4]), gf4096_inv(m[2][1]));
369 tmp[2] = gf4096_mul((gf4096_mul(tmp[0], m[1][0]) ^ gf4096_mul(tmp[1], m[1][1]) ^ m[1][4]), gf4096_inv(m[1][2]));
370 tmp[3] = gf4096_mul((gf4096_mul(tmp[0], m[0][0]) ^
371 gf4096_mul(tmp[1], m[0][1]) ^ gf4096_mul(tmp[2], m[0][2]) ^ m[0][4]), gf4096_inv(m[0][3]));
372 sort_coefs(row_order, tmp, 4);
373 coefs[0] = tmp[0];
374 coefs[1] = tmp[1];
375 coefs[2] = tmp[2];
376 coefs[3] = tmp[3];
377 }
378
379 static void sort_coefs(int *order, unsigned short *soln, int len)
380 {
381 int cnt, start_cnt, least_ord, least_cnt;
382 unsigned short tmp0;
383 for (start_cnt = 0; start_cnt < len; start_cnt++) {
384 for (cnt = start_cnt; cnt < len; cnt++) {
385 if (cnt == start_cnt) {
386 least_ord = order[cnt];
387 least_cnt = start_cnt;
388 } else {
389 if (least_ord > order[cnt]) {
390 least_ord = order[cnt];
391 least_cnt = cnt;
392 }
393 }
394 }
395 if (least_cnt != start_cnt) {
396 tmp0 = order[least_cnt];
397 order[least_cnt] = order[start_cnt];
398 order[start_cnt] = tmp0;
399 tmp0 = soln[least_cnt];
400 soln[least_cnt] = soln[start_cnt];
401 soln[start_cnt] = tmp0;
402 }
403 }
404 }
405
406 static void find_4bit_err_pats(unsigned short s0, unsigned short s1,
407 unsigned short s2, unsigned short s3,
408 unsigned short z1, unsigned short z2,
409 unsigned short z3, unsigned short z4,
410 unsigned short *pats)
411 {
412 unsigned short z4_z1, z3z4_z3z3, z4_z2, s0z4_s1, z1z4_z1z1,
413 z4_z3, z2z4_z2z2, s1z4_s2, z3z3z4_z3z3z3, z1z1z4_z1z1z1, z2z2z4_z2z2z2, s2z4_s3;
414 unsigned short tmp0, tmp1, tmp2, tmp3;
415
416 z4_z1 = z4 ^ z1;
417 z3z4_z3z3 = gf4096_mul(z3, z4) ^ gf4096_mul(z3, z3);
418 z4_z2 = z4 ^ z2;
419 s0z4_s1 = gf4096_mul(s0, z4) ^ s1;
420 z1z4_z1z1 = gf4096_mul(z1, z4) ^ gf4096_mul(z1, z1);
421 z4_z3 = z4 ^ z3;
422 z2z4_z2z2 = gf4096_mul(z2, z4) ^ gf4096_mul(z2, z2);
423 s1z4_s2 = gf4096_mul(s1, z4) ^ s2;
424 z3z3z4_z3z3z3 = gf4096_mul(gf4096_mul(z3, z3), z4) ^ gf4096_mul(gf4096_mul(z3, z3), z3);
425 z1z1z4_z1z1z1 = gf4096_mul(gf4096_mul(z1, z1), z4) ^ gf4096_mul(gf4096_mul(z1, z1), z1);
426 z2z2z4_z2z2z2 = gf4096_mul(gf4096_mul(z2, z2), z4) ^ gf4096_mul(gf4096_mul(z2, z2), z2);
427 s2z4_s3 = gf4096_mul(s2, z4) ^ s3;
428
429 //find err pat 0,1
430 find_2x2_soln(gf4096_mul(z4_z1, z3z4_z3z3) ^
431 gf4096_mul(z1z4_z1z1, z4_z3), gf4096_mul(z4_z2,
432 z3z4_z3z3) ^
433 gf4096_mul(z2z4_z2z2, z4_z3), gf4096_mul(z1z4_z1z1,
434 z3z3z4_z3z3z3) ^
435 gf4096_mul(z1z1z4_z1z1z1, z3z4_z3z3),
436 gf4096_mul(z2z4_z2z2,
437 z3z3z4_z3z3z3) ^ gf4096_mul(z2z2z4_z2z2z2,
438 z3z4_z3z3),
439 gf4096_mul(s0z4_s1, z3z4_z3z3) ^ gf4096_mul(s1z4_s2,
440 z4_z3),
441 gf4096_mul(s1z4_s2, z3z3z4_z3z3z3) ^ gf4096_mul(s2z4_s3, z3z4_z3z3), pats);
442 tmp0 = pats[0];
443 tmp1 = pats[1];
444 tmp2 = pats[0] ^ pats[1] ^ s0;
445 tmp3 = gf4096_mul(pats[0], z1) ^ gf4096_mul(pats[1], z2) ^ s1;
446
447 //find err pat 2,3
448 find_2x2_soln(0x1, 0x1, z3, z4, tmp2, tmp3, pats);
449 pats[2] = pats[0];
450 pats[3] = pats[1];
451 pats[0] = tmp0;
452 pats[1] = tmp1;
453 }
454
455 static void find_2x2_soln(unsigned short c00, unsigned short c01,
456 unsigned short c10, unsigned short c11,
457 unsigned short lval0, unsigned short lval1,
458 unsigned short *soln)
459 {
460 unsigned short m[2][3];
461 m[0][0] = c00;
462 m[0][1] = c01;
463 m[0][2] = lval0;
464 m[1][0] = c10;
465 m[1][1] = c11;
466 m[1][2] = lval1;
467
468 if (m[0][1] != 0x0) {
469 /* */
470 } else if (m[1][1] != 0x0) {
471 swap_2x3_rows(m);
472 } else {
473 printk(KERN_ERR "Warning: find_2bit_err_coefs, s0,s1 all zeros!\n");
474 }
475
476 solve_2x3(m, soln);
477 }
478
479 static void swap_2x3_rows(unsigned short m[2][3])
480 {
481 unsigned short tmp0;
482 int cnt;
483
484 for (cnt = 0; cnt < 3; cnt++) {
485 tmp0 = m[0][cnt];
486 m[0][cnt] = m[1][cnt];
487 m[1][cnt] = tmp0;
488 }
489 }
490
491 static void solve_2x3(unsigned short m[2][3], unsigned short *coefs)
492 {
493 unsigned short minv;
494
495 minv = gf4096_mul(m[1][1], gf4096_inv(m[0][1]));
496 m[1][0] = m[1][0] ^ gf4096_mul(m[0][0], minv);
497 m[1][2] = m[1][2] ^ gf4096_mul(m[0][2], minv);
498 coefs[0] = gf4096_mul(m[1][2], gf4096_inv(m[1][0]));
499 coefs[1] = gf4096_mul((gf4096_mul(coefs[0], m[0][0]) ^ m[0][2]), gf4096_inv(m[0][1]));
500 }
501
502 static unsigned char gf64_inv[64] = {
503 0, 1, 33, 62, 49, 43, 31, 44, 57, 37, 52, 28, 46, 40, 22, 25,
504 61, 54, 51, 39, 26, 35, 14, 24, 23, 15, 20, 34, 11, 53, 45, 6,
505 63, 2, 27, 21, 56, 9, 50, 19, 13, 47, 48, 5, 7, 30, 12, 41,
506 42, 4, 38, 18, 10, 29, 17, 60, 36, 8, 59, 58, 55, 16, 3, 32
507 };
508
509 static unsigned short gf4096_inv(unsigned short din)
510 {
511 unsigned short alahxal, ah2B, deno, inv, bl, bh;
512 unsigned short ah, al, ahxal;
513 unsigned short dout;
514
515 ah = (din >> 6) & 0x3f;
516 al = din & 0x3f;
517 ahxal = ah ^ al;
518 ah2B = (((ah ^ (ah >> 3)) & 0x1) << 5) |
519 ((ah >> 1) & 0x10) |
520 ((((ah >> 5) ^ (ah >> 2)) & 0x1) << 3) |
521 ((ah >> 2) & 0x4) | ((((ah >> 4) ^ (ah >> 1)) & 0x1) << 1) | (ah & 0x1);
522 alahxal = gf64_mul(ahxal, al);
523 deno = alahxal ^ ah2B;
524 inv = gf64_inv[deno];
525 bl = gf64_mul(inv, ahxal);
526 bh = gf64_mul(inv, ah);
527 dout = ((bh & 0x3f) << 6) | (bl & 0x3f);
528 return (((bh & 0x3f) << 6) | (bl & 0x3f));
529 }
530
531 static unsigned short err_pos_lut[4096] = {
532 0xfff, 0x000, 0x451, 0xfff, 0xfff, 0x3cf, 0xfff, 0x041,
533 0xfff, 0xfff, 0xfff, 0xfff, 0x28a, 0xfff, 0x492, 0xfff,
534 0x145, 0xfff, 0xfff, 0x514, 0xfff, 0x082, 0xfff, 0xfff,
535 0xfff, 0x249, 0x38e, 0x410, 0xfff, 0x104, 0x208, 0x1c7,
536 0xfff, 0xfff, 0xfff, 0xfff, 0x2cb, 0xfff, 0xfff, 0xfff,
537 0x0c3, 0x34d, 0x4d3, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
538 0xfff, 0xfff, 0xfff, 0x186, 0xfff, 0xfff, 0xfff, 0xfff,
539 0xfff, 0x30c, 0x555, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
540 0xfff, 0xfff, 0xfff, 0x166, 0xfff, 0xfff, 0xfff, 0xfff,
541 0x385, 0x14e, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x4e1,
542 0xfff, 0xfff, 0xfff, 0xfff, 0x538, 0xfff, 0x16d, 0xfff,
543 0xfff, 0xfff, 0x45b, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
544 0xfff, 0xfff, 0xfff, 0x29c, 0x2cc, 0x30b, 0x2b3, 0xfff,
545 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x0b3, 0xfff, 0x2f7,
546 0xfff, 0x32b, 0xfff, 0xfff, 0xfff, 0xfff, 0x0a7, 0xfff,
547 0xfff, 0x2da, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
548 0xfff, 0x07e, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
549 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x11c, 0xfff, 0xfff,
550 0xfff, 0xfff, 0xfff, 0x22f, 0xfff, 0x1f4, 0xfff, 0xfff,
551 0x2b0, 0x504, 0xfff, 0x114, 0xfff, 0xfff, 0xfff, 0x21d,
552 0xfff, 0xfff, 0xfff, 0xfff, 0x00d, 0x3c4, 0x340, 0x10f,
553 0xfff, 0xfff, 0x266, 0x02e, 0xfff, 0xfff, 0xfff, 0x4f8,
554 0x337, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
555 0xfff, 0xfff, 0xfff, 0x07b, 0x168, 0xfff, 0xfff, 0x0fe,
556 0xfff, 0xfff, 0x51a, 0xfff, 0x458, 0xfff, 0x36d, 0xfff,
557 0xfff, 0xfff, 0xfff, 0x073, 0x37d, 0x415, 0x550, 0xfff,
558 0xfff, 0xfff, 0x23b, 0x4b4, 0xfff, 0xfff, 0xfff, 0x1a1,
559 0xfff, 0xfff, 0x3aa, 0xfff, 0x117, 0x04d, 0x341, 0xfff,
560 0xfff, 0xfff, 0xfff, 0x518, 0x03e, 0x0f2, 0xfff, 0xfff,
561 0xfff, 0xfff, 0xfff, 0x363, 0xfff, 0x0b9, 0xfff, 0xfff,
562 0x241, 0xfff, 0xfff, 0x049, 0xfff, 0xfff, 0xfff, 0xfff,
563 0x15f, 0x52d, 0xfff, 0xfff, 0xfff, 0x29e, 0xfff, 0xfff,
564 0xfff, 0xfff, 0x4cf, 0x0fc, 0xfff, 0x36f, 0x3d3, 0xfff,
565 0x228, 0xfff, 0xfff, 0x45e, 0xfff, 0xfff, 0xfff, 0xfff,
566 0x238, 0xfff, 0xfff, 0xfff, 0xfff, 0x47f, 0xfff, 0xfff,
567 0x43a, 0x265, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x3e8,
568 0xfff, 0xfff, 0x01a, 0xfff, 0xfff, 0xfff, 0xfff, 0x21e,
569 0x1fc, 0x40b, 0xfff, 0xfff, 0xfff, 0x2d0, 0x159, 0xfff,
570 0xfff, 0x313, 0xfff, 0xfff, 0x05c, 0x4cc, 0xfff, 0xfff,
571 0x0f6, 0x3d5, 0xfff, 0xfff, 0xfff, 0x54f, 0xfff, 0xfff,
572 0xfff, 0x172, 0x1e4, 0x07c, 0xfff, 0xfff, 0xfff, 0xfff,
573 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x53c, 0x1ad, 0x535,
574 0x19b, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
575 0xfff, 0xfff, 0x092, 0xfff, 0x2be, 0xfff, 0xfff, 0x482,
576 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x0e6, 0xfff, 0xfff,
577 0xfff, 0xfff, 0xfff, 0x476, 0xfff, 0x51d, 0xfff, 0xfff,
578 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
579 0xfff, 0xfff, 0x342, 0x2b5, 0x22e, 0x09a, 0xfff, 0x08d,
580 0x44f, 0x3ed, 0xfff, 0xfff, 0xfff, 0xfff, 0x3d1, 0xfff,
581 0xfff, 0x543, 0xfff, 0x48f, 0xfff, 0x3d2, 0xfff, 0x0d5,
582 0x113, 0x0ec, 0x427, 0xfff, 0xfff, 0xfff, 0x4c4, 0xfff,
583 0xfff, 0x50a, 0xfff, 0x144, 0xfff, 0x105, 0x39f, 0x294,
584 0x164, 0xfff, 0x31a, 0xfff, 0xfff, 0x49a, 0xfff, 0x130,
585 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
586 0x1be, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
587 0xfff, 0xfff, 0x49e, 0x371, 0xfff, 0xfff, 0xfff, 0xfff,
588 0xfff, 0xfff, 0xfff, 0xfff, 0x0e8, 0x49c, 0x0f4, 0xfff,
589 0x338, 0x1a7, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
590 0xfff, 0x36c, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
591 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
592 0xfff, 0x1ae, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
593 0xfff, 0x31b, 0xfff, 0xfff, 0x2dd, 0x522, 0xfff, 0xfff,
594 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x2f4,
595 0x3c6, 0x30d, 0xfff, 0xfff, 0xfff, 0xfff, 0x34c, 0x18f,
596 0x30a, 0xfff, 0x01f, 0x079, 0xfff, 0xfff, 0x54d, 0x46b,
597 0x28c, 0x37f, 0xfff, 0xfff, 0xfff, 0xfff, 0x355, 0xfff,
598 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x14f, 0xfff, 0xfff,
599 0xfff, 0xfff, 0xfff, 0x359, 0x3fe, 0x3c5, 0xfff, 0xfff,
600 0xfff, 0xfff, 0x423, 0xfff, 0xfff, 0x34a, 0x22c, 0xfff,
601 0x25a, 0xfff, 0xfff, 0x4ad, 0xfff, 0x28d, 0xfff, 0xfff,
602 0xfff, 0xfff, 0xfff, 0x547, 0xfff, 0xfff, 0xfff, 0xfff,
603 0x2e2, 0xfff, 0xfff, 0x1d5, 0xfff, 0x2a8, 0xfff, 0xfff,
604 0x03f, 0xfff, 0xfff, 0xfff, 0xfff, 0x3eb, 0x0fa, 0xfff,
605 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x55b, 0xfff,
606 0x08e, 0xfff, 0x3ae, 0xfff, 0x3a4, 0xfff, 0x282, 0x158,
607 0xfff, 0x382, 0xfff, 0xfff, 0x499, 0xfff, 0xfff, 0x08a,
608 0xfff, 0xfff, 0xfff, 0x456, 0x3be, 0xfff, 0x1e2, 0xfff,
609 0xfff, 0xfff, 0xfff, 0xfff, 0x559, 0xfff, 0x1a0, 0xfff,
610 0xfff, 0x0b4, 0xfff, 0xfff, 0xfff, 0x2df, 0xfff, 0xfff,
611 0xfff, 0x07f, 0x4f5, 0xfff, 0xfff, 0x27c, 0x133, 0x017,
612 0xfff, 0x3fd, 0xfff, 0xfff, 0xfff, 0x44d, 0x4cd, 0x17a,
613 0x0d7, 0x537, 0xfff, 0xfff, 0x353, 0xfff, 0xfff, 0x351,
614 0x366, 0xfff, 0x44a, 0xfff, 0x1a6, 0xfff, 0xfff, 0xfff,
615 0x291, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x1e3,
616 0xfff, 0xfff, 0xfff, 0xfff, 0x389, 0xfff, 0x07a, 0xfff,
617 0x1b6, 0x2ed, 0xfff, 0xfff, 0xfff, 0xfff, 0x24e, 0x074,
618 0xfff, 0xfff, 0x3dc, 0xfff, 0x4e3, 0xfff, 0xfff, 0xfff,
619 0xfff, 0x4eb, 0xfff, 0xfff, 0x3b8, 0x4de, 0xfff, 0x19c,
620 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x262,
621 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x076, 0x4e8, 0x3da,
622 0xfff, 0x531, 0xfff, 0xfff, 0x14a, 0xfff, 0x0a2, 0x433,
623 0x3df, 0x1e9, 0xfff, 0xfff, 0xfff, 0xfff, 0x3e7, 0x285,
624 0x2d8, 0xfff, 0xfff, 0xfff, 0x349, 0x18d, 0x098, 0xfff,
625 0x0df, 0x4bf, 0xfff, 0xfff, 0x0b2, 0xfff, 0x346, 0x24d,
626 0xfff, 0xfff, 0xfff, 0x24f, 0x4fa, 0x2f9, 0xfff, 0xfff,
627 0x3c9, 0xfff, 0x2b4, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
628 0xfff, 0x056, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
629 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
630 0xfff, 0x179, 0xfff, 0x0e9, 0x3f0, 0x33d, 0xfff, 0xfff,
631 0xfff, 0xfff, 0xfff, 0x1fd, 0xfff, 0xfff, 0x526, 0xfff,
632 0xfff, 0xfff, 0x53d, 0xfff, 0xfff, 0xfff, 0x170, 0x331,
633 0xfff, 0x068, 0xfff, 0xfff, 0xfff, 0x3f7, 0xfff, 0x3d8,
634 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
635 0xfff, 0x09f, 0x556, 0xfff, 0xfff, 0x02d, 0xfff, 0xfff,
636 0x553, 0xfff, 0xfff, 0xfff, 0x1f0, 0xfff, 0xfff, 0x4d6,
637 0x41e, 0xfff, 0xfff, 0xfff, 0xfff, 0x4d5, 0xfff, 0xfff,
638 0xfff, 0xfff, 0xfff, 0x248, 0xfff, 0xfff, 0xfff, 0x0a3,
639 0xfff, 0x217, 0xfff, 0xfff, 0xfff, 0x4f1, 0x209, 0xfff,
640 0xfff, 0x475, 0x234, 0x52b, 0x398, 0xfff, 0x08b, 0xfff,
641 0xfff, 0xfff, 0xfff, 0x2c2, 0xfff, 0xfff, 0xfff, 0xfff,
642 0xfff, 0xfff, 0x268, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
643 0xfff, 0x4a3, 0xfff, 0x0aa, 0xfff, 0x1d9, 0xfff, 0xfff,
644 0xfff, 0xfff, 0x155, 0xfff, 0xfff, 0xfff, 0xfff, 0x0bf,
645 0x539, 0xfff, 0xfff, 0x2f1, 0x545, 0xfff, 0xfff, 0xfff,
646 0xfff, 0xfff, 0xfff, 0x2a7, 0x06f, 0xfff, 0x378, 0xfff,
647 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x25e, 0xfff,
648 0xfff, 0xfff, 0xfff, 0x15d, 0x02a, 0xfff, 0xfff, 0x0bc,
649 0x235, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
650 0x150, 0xfff, 0x1a9, 0xfff, 0xfff, 0xfff, 0xfff, 0x381,
651 0xfff, 0x04e, 0x270, 0x13f, 0xfff, 0xfff, 0x405, 0xfff,
652 0x3cd, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
653 0xfff, 0x2ef, 0xfff, 0x06a, 0xfff, 0xfff, 0xfff, 0x34f,
654 0x212, 0xfff, 0xfff, 0x0e2, 0xfff, 0x083, 0x298, 0xfff,
655 0xfff, 0xfff, 0x0c2, 0xfff, 0xfff, 0x52e, 0xfff, 0x488,
656 0xfff, 0xfff, 0xfff, 0x36b, 0xfff, 0xfff, 0xfff, 0x442,
657 0x091, 0xfff, 0x41c, 0xfff, 0xfff, 0x3a5, 0xfff, 0x4e6,
658 0xfff, 0xfff, 0x40d, 0x31d, 0xfff, 0xfff, 0xfff, 0x4c1,
659 0x053, 0xfff, 0x418, 0x13c, 0xfff, 0x350, 0xfff, 0x0ae,
660 0xfff, 0xfff, 0x41f, 0xfff, 0x470, 0xfff, 0x4ca, 0xfff,
661 0xfff, 0xfff, 0x02b, 0x450, 0xfff, 0x1f8, 0xfff, 0xfff,
662 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x293, 0xfff,
663 0xfff, 0xfff, 0xfff, 0x411, 0xfff, 0xfff, 0xfff, 0xfff,
664 0xfff, 0xfff, 0xfff, 0xfff, 0x0b8, 0xfff, 0xfff, 0xfff,
665 0x3e1, 0xfff, 0xfff, 0xfff, 0xfff, 0x43c, 0xfff, 0x2b2,
666 0x2ab, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x1ec,
667 0xfff, 0xfff, 0xfff, 0x3f8, 0x034, 0xfff, 0xfff, 0xfff,
668 0xfff, 0xfff, 0xfff, 0x11a, 0xfff, 0x541, 0x45c, 0x134,
669 0x1cc, 0xfff, 0xfff, 0xfff, 0x469, 0xfff, 0xfff, 0x44b,
670 0x161, 0xfff, 0xfff, 0xfff, 0x055, 0xfff, 0xfff, 0xfff,
671 0xfff, 0x307, 0xfff, 0xfff, 0xfff, 0xfff, 0x2d1, 0xfff,
672 0xfff, 0xfff, 0x124, 0x37b, 0x26b, 0x336, 0xfff, 0xfff,
673 0x2e4, 0x3cb, 0xfff, 0xfff, 0x0f8, 0x3c8, 0xfff, 0xfff,
674 0xfff, 0x461, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x4b5,
675 0x2cf, 0xfff, 0xfff, 0xfff, 0x20f, 0xfff, 0x35a, 0xfff,
676 0x490, 0xfff, 0x185, 0xfff, 0xfff, 0xfff, 0xfff, 0x42e,
677 0xfff, 0xfff, 0xfff, 0xfff, 0x54b, 0xfff, 0xfff, 0xfff,
678 0x146, 0xfff, 0x412, 0xfff, 0xfff, 0xfff, 0x1ff, 0xfff,
679 0xfff, 0x3e0, 0xfff, 0xfff, 0xfff, 0xfff, 0x2d5, 0xfff,
680 0x4df, 0x505, 0xfff, 0x413, 0xfff, 0x1a5, 0xfff, 0x3b2,
681 0xfff, 0xfff, 0xfff, 0x35b, 0xfff, 0x116, 0xfff, 0xfff,
682 0x171, 0x4d0, 0xfff, 0x154, 0x12d, 0xfff, 0xfff, 0xfff,
683 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x468, 0x4db, 0xfff,
684 0xfff, 0x1df, 0xfff, 0xfff, 0xfff, 0xfff, 0x05a, 0xfff,
685 0x0f1, 0x403, 0xfff, 0x22b, 0x2e0, 0xfff, 0xfff, 0xfff,
686 0x2b7, 0x373, 0xfff, 0xfff, 0xfff, 0xfff, 0x13e, 0xfff,
687 0xfff, 0xfff, 0x0d0, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
688 0x329, 0x1d2, 0x3fa, 0x047, 0xfff, 0x2f2, 0xfff, 0xfff,
689 0x141, 0x0ac, 0x1d7, 0xfff, 0x07d, 0xfff, 0xfff, 0xfff,
690 0x1c1, 0xfff, 0x487, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
691 0xfff, 0xfff, 0xfff, 0x045, 0xfff, 0xfff, 0xfff, 0xfff,
692 0x288, 0x0cd, 0xfff, 0xfff, 0xfff, 0xfff, 0x226, 0x1d8,
693 0xfff, 0x153, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x4cb,
694 0x528, 0xfff, 0xfff, 0xfff, 0x20a, 0x343, 0x3a1, 0xfff,
695 0xfff, 0xfff, 0x2d7, 0x2d3, 0x1aa, 0x4c5, 0xfff, 0xfff,
696 0xfff, 0x42b, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
697 0xfff, 0xfff, 0xfff, 0xfff, 0x3e9, 0xfff, 0x20b, 0x260,
698 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x37c, 0x2fd,
699 0xfff, 0xfff, 0x2c8, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
700 0xfff, 0x31e, 0xfff, 0x335, 0xfff, 0xfff, 0xfff, 0xfff,
701 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
702 0xfff, 0xfff, 0x135, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
703 0xfff, 0xfff, 0x35c, 0x4dd, 0x129, 0xfff, 0xfff, 0xfff,
704 0xfff, 0xfff, 0x1ef, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
705 0xfff, 0x34e, 0xfff, 0xfff, 0xfff, 0xfff, 0x407, 0xfff,
706 0xfff, 0xfff, 0xfff, 0xfff, 0x3ad, 0xfff, 0xfff, 0xfff,
707 0x379, 0xfff, 0xfff, 0x1d0, 0x38d, 0xfff, 0xfff, 0x1e8,
708 0x184, 0x3c1, 0x1c4, 0xfff, 0x1f9, 0xfff, 0xfff, 0x424,
709 0xfff, 0xfff, 0xfff, 0xfff, 0x1d3, 0x0d4, 0xfff, 0x4e9,
710 0xfff, 0xfff, 0xfff, 0x530, 0x107, 0xfff, 0x106, 0x04f,
711 0xfff, 0xfff, 0x4c7, 0x503, 0xfff, 0xfff, 0xfff, 0xfff,
712 0xfff, 0x15c, 0xfff, 0x23f, 0xfff, 0xfff, 0xfff, 0xfff,
713 0xfff, 0xfff, 0xfff, 0xfff, 0x4f3, 0xfff, 0xfff, 0x3c7,
714 0xfff, 0x278, 0xfff, 0xfff, 0x0a6, 0xfff, 0xfff, 0xfff,
715 0x122, 0x1cf, 0xfff, 0x327, 0xfff, 0x2e5, 0xfff, 0x29d,
716 0xfff, 0xfff, 0x3f1, 0xfff, 0xfff, 0x48d, 0xfff, 0xfff,
717 0xfff, 0xfff, 0x054, 0xfff, 0xfff, 0xfff, 0xfff, 0x178,
718 0x27e, 0x4e0, 0x352, 0x02f, 0x09c, 0xfff, 0x2a0, 0xfff,
719 0xfff, 0x46a, 0x457, 0xfff, 0xfff, 0x501, 0xfff, 0x2ba,
720 0xfff, 0xfff, 0xfff, 0x54e, 0x2e7, 0xfff, 0xfff, 0xfff,
721 0xfff, 0xfff, 0x551, 0xfff, 0xfff, 0x1db, 0x2aa, 0xfff,
722 0xfff, 0x4bc, 0xfff, 0xfff, 0x395, 0xfff, 0x0de, 0xfff,
723 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x455, 0xfff, 0x17e,
724 0xfff, 0x221, 0x4a7, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
725 0x388, 0xfff, 0xfff, 0xfff, 0x308, 0xfff, 0xfff, 0xfff,
726 0x20e, 0x4b9, 0xfff, 0x273, 0x20c, 0x09e, 0xfff, 0x057,
727 0xfff, 0xfff, 0xfff, 0xfff, 0x3f2, 0xfff, 0x1a8, 0x3a6,
728 0x14c, 0xfff, 0xfff, 0x071, 0xfff, 0xfff, 0x53a, 0xfff,
729 0xfff, 0xfff, 0xfff, 0x109, 0xfff, 0xfff, 0x399, 0xfff,
730 0x061, 0x4f0, 0x39e, 0x244, 0xfff, 0x035, 0xfff, 0xfff,
731 0x305, 0x47e, 0x297, 0xfff, 0xfff, 0x2b8, 0xfff, 0xfff,
732 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x1bc, 0xfff, 0x2fc,
733 0xfff, 0xfff, 0x554, 0xfff, 0xfff, 0xfff, 0xfff, 0x3b6,
734 0xfff, 0xfff, 0xfff, 0x515, 0x397, 0xfff, 0xfff, 0x12f,
735 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x4e5,
736 0xfff, 0x4fc, 0xfff, 0xfff, 0x05e, 0xfff, 0xfff, 0xfff,
737 0xfff, 0xfff, 0x0a8, 0x3af, 0x015, 0xfff, 0xfff, 0xfff,
738 0xfff, 0x138, 0xfff, 0xfff, 0xfff, 0x540, 0xfff, 0xfff,
739 0xfff, 0x027, 0x523, 0x2f0, 0xfff, 0xfff, 0xfff, 0xfff,
740 0xfff, 0xfff, 0x16c, 0xfff, 0x27d, 0xfff, 0xfff, 0xfff,
741 0xfff, 0x04c, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x4dc,
742 0xfff, 0xfff, 0x059, 0x301, 0xfff, 0xfff, 0xfff, 0xfff,
743 0xfff, 0xfff, 0xfff, 0x1a3, 0xfff, 0x15a, 0xfff, 0xfff,
744 0x0a5, 0xfff, 0x435, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
745 0xfff, 0x051, 0xfff, 0xfff, 0x131, 0xfff, 0x4f4, 0xfff,
746 0xfff, 0xfff, 0xfff, 0x441, 0xfff, 0x4fb, 0xfff, 0x03b,
747 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x1ed, 0x274,
748 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x0d3, 0x55e, 0x1b3,
749 0xfff, 0x0bd, 0xfff, 0xfff, 0xfff, 0xfff, 0x225, 0xfff,
750 0xfff, 0xfff, 0xfff, 0xfff, 0x4b7, 0xfff, 0xfff, 0x2ff,
751 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x4c3, 0xfff,
752 0x383, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x2f6,
753 0xfff, 0xfff, 0x1ee, 0xfff, 0x03d, 0xfff, 0xfff, 0xfff,
754 0xfff, 0xfff, 0x26f, 0x1dc, 0xfff, 0x0db, 0xfff, 0xfff,
755 0xfff, 0xfff, 0xfff, 0x0ce, 0xfff, 0xfff, 0x127, 0x03a,
756 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x311, 0xfff,
757 0xfff, 0x13d, 0x09d, 0x47b, 0x2a6, 0x50d, 0x510, 0x19a,
758 0xfff, 0x354, 0x414, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
759 0xfff, 0xfff, 0x44c, 0x3b0, 0xfff, 0x23d, 0x429, 0xfff,
760 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
761 0x4c0, 0x416, 0xfff, 0x05b, 0xfff, 0xfff, 0x137, 0xfff,
762 0x25f, 0x49f, 0xfff, 0x279, 0x013, 0xfff, 0xfff, 0xfff,
763 0x269, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
764 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x3d0, 0xfff, 0xfff,
765 0xfff, 0xfff, 0xfff, 0xfff, 0x077, 0xfff, 0xfff, 0x3fb,
766 0xfff, 0xfff, 0xfff, 0xfff, 0x271, 0x3a0, 0xfff, 0xfff,
767 0x40f, 0xfff, 0xfff, 0x3de, 0xfff, 0xfff, 0xfff, 0xfff,
768 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x1ab, 0x26a,
769 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x489, 0xfff, 0xfff,
770 0x252, 0xfff, 0xfff, 0xfff, 0xfff, 0x1b7, 0x42f, 0xfff,
771 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x3b7,
772 0xfff, 0x2bb, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
773 0xfff, 0xfff, 0xfff, 0x0f7, 0x01d, 0xfff, 0x067, 0xfff,
774 0xfff, 0xfff, 0xfff, 0x4e2, 0xfff, 0xfff, 0x4bb, 0xfff,
775 0xfff, 0xfff, 0x17b, 0xfff, 0x0ee, 0xfff, 0xfff, 0xfff,
776 0xfff, 0xfff, 0x36e, 0xfff, 0xfff, 0xfff, 0x533, 0xfff,
777 0xfff, 0xfff, 0x4d4, 0x356, 0xfff, 0xfff, 0x375, 0xfff,
778 0xfff, 0xfff, 0xfff, 0x4a4, 0x513, 0xfff, 0xfff, 0xfff,
779 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x4ff, 0xfff, 0x2af,
780 0xfff, 0xfff, 0x026, 0xfff, 0x0ad, 0xfff, 0xfff, 0xfff,
781 0xfff, 0x26e, 0xfff, 0xfff, 0xfff, 0xfff, 0x493, 0xfff,
782 0x463, 0x4d2, 0x4be, 0xfff, 0xfff, 0xfff, 0xfff, 0x4f2,
783 0x0b6, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
784 0xfff, 0x32d, 0x315, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
785 0xfff, 0x13a, 0x4a1, 0xfff, 0x27a, 0xfff, 0xfff, 0xfff,
786 0x47a, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
787 0x334, 0xfff, 0xfff, 0xfff, 0xfff, 0x54c, 0xfff, 0xfff,
788 0xfff, 0x0c9, 0x007, 0xfff, 0xfff, 0x12e, 0xfff, 0x0ff,
789 0xfff, 0xfff, 0x3f5, 0x509, 0xfff, 0xfff, 0xfff, 0xfff,
790 0x1c3, 0x2ad, 0xfff, 0xfff, 0x47c, 0x261, 0xfff, 0xfff,
791 0xfff, 0xfff, 0xfff, 0x152, 0xfff, 0xfff, 0xfff, 0x339,
792 0xfff, 0x243, 0x1c0, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
793 0x063, 0xfff, 0xfff, 0x254, 0xfff, 0xfff, 0x173, 0xfff,
794 0x0c7, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
795 0xfff, 0x362, 0x259, 0x485, 0x374, 0x0dc, 0x3ab, 0xfff,
796 0x1c5, 0x534, 0x544, 0xfff, 0xfff, 0x508, 0xfff, 0x402,
797 0x408, 0xfff, 0x0e7, 0xfff, 0xfff, 0x00a, 0x205, 0xfff,
798 0xfff, 0x2b9, 0xfff, 0xfff, 0xfff, 0x465, 0xfff, 0xfff,
799 0xfff, 0xfff, 0xfff, 0xfff, 0x23a, 0xfff, 0xfff, 0xfff,
800 0xfff, 0x147, 0x19d, 0x115, 0x214, 0xfff, 0x090, 0x368,
801 0xfff, 0x210, 0xfff, 0xfff, 0x280, 0x52a, 0x163, 0x148,
802 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x326, 0xfff, 0xfff,
803 0xfff, 0xfff, 0xfff, 0x2de, 0xfff, 0xfff, 0xfff, 0xfff,
804 0x206, 0x2c1, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
805 0x189, 0xfff, 0xfff, 0xfff, 0xfff, 0x367, 0xfff, 0x1a4,
806 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x443, 0xfff, 0x27b,
807 0xfff, 0xfff, 0x251, 0x549, 0xfff, 0xfff, 0xfff, 0xfff,
808 0xfff, 0xfff, 0x188, 0x04b, 0xfff, 0xfff, 0xfff, 0x31f,
809 0x4a6, 0xfff, 0x246, 0x1de, 0x156, 0xfff, 0xfff, 0xfff,
810 0x3a9, 0xfff, 0xfff, 0xfff, 0x2fa, 0xfff, 0x128, 0x0d1,
811 0x449, 0x255, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
812 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
813 0xfff, 0xfff, 0xfff, 0xfff, 0x258, 0xfff, 0xfff, 0xfff,
814 0x532, 0xfff, 0xfff, 0xfff, 0x303, 0x517, 0xfff, 0xfff,
815 0x2a9, 0x24a, 0xfff, 0xfff, 0x231, 0xfff, 0xfff, 0xfff,
816 0xfff, 0xfff, 0x4b6, 0x516, 0xfff, 0xfff, 0x0e4, 0x0eb,
817 0xfff, 0x4e4, 0xfff, 0x275, 0xfff, 0xfff, 0x031, 0xfff,
818 0xfff, 0xfff, 0xfff, 0xfff, 0x025, 0x21a, 0xfff, 0x0cc,
819 0x45f, 0x3d9, 0x289, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
820 0xfff, 0xfff, 0x23e, 0xfff, 0xfff, 0xfff, 0x438, 0x097,
821 0x419, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
822 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
823 0xfff, 0xfff, 0x0a9, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
824 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
825 0x37e, 0x0e0, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x431,
826 0x372, 0xfff, 0xfff, 0xfff, 0x1ba, 0x06e, 0xfff, 0x1b1,
827 0xfff, 0xfff, 0x12a, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
828 0xfff, 0xfff, 0x193, 0xfff, 0xfff, 0xfff, 0xfff, 0x10a,
829 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x048, 0x1b4,
830 0xfff, 0xfff, 0xfff, 0xfff, 0x295, 0x140, 0x108, 0xfff,
831 0xfff, 0xfff, 0xfff, 0x16f, 0xfff, 0x0a4, 0x37a, 0xfff,
832 0x29a, 0xfff, 0x284, 0xfff, 0xfff, 0xfff, 0xfff, 0x4c6,
833 0x2a2, 0x3a3, 0xfff, 0x201, 0xfff, 0xfff, 0xfff, 0x4bd,
834 0x005, 0x54a, 0x3b5, 0x204, 0x2ee, 0x11d, 0x436, 0xfff,
835 0xfff, 0xfff, 0xfff, 0xfff, 0x3ec, 0xfff, 0xfff, 0xfff,
836 0xfff, 0xfff, 0xfff, 0xfff, 0x11f, 0x498, 0x21c, 0xfff,
837 0xfff, 0xfff, 0x3d6, 0xfff, 0x4ab, 0xfff, 0x432, 0x2eb,
838 0x542, 0x4fd, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
839 0xfff, 0xfff, 0xfff, 0x4ce, 0xfff, 0xfff, 0x2fb, 0xfff,
840 0xfff, 0x2e1, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
841 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x1b9, 0x037, 0x0dd,
842 0xfff, 0xfff, 0xfff, 0x2bf, 0x521, 0x496, 0x095, 0xfff,
843 0xfff, 0x328, 0x070, 0x1bf, 0xfff, 0x393, 0xfff, 0xfff,
844 0x102, 0xfff, 0xfff, 0x21b, 0xfff, 0x142, 0x263, 0x519,
845 0xfff, 0x2a5, 0x177, 0xfff, 0x14d, 0x471, 0x4ae, 0xfff,
846 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
847 0x1f6, 0xfff, 0x481, 0xfff, 0xfff, 0xfff, 0x151, 0xfff,
848 0xfff, 0xfff, 0x085, 0x33f, 0xfff, 0xfff, 0xfff, 0x084,
849 0xfff, 0xfff, 0xfff, 0x345, 0x3a2, 0xfff, 0xfff, 0x0a0,
850 0x0da, 0x024, 0xfff, 0xfff, 0xfff, 0x1bd, 0xfff, 0x55c,
851 0x467, 0x445, 0xfff, 0xfff, 0xfff, 0x052, 0xfff, 0xfff,
852 0xfff, 0xfff, 0x51e, 0xfff, 0xfff, 0x39d, 0xfff, 0x35f,
853 0xfff, 0x376, 0x3ee, 0xfff, 0xfff, 0xfff, 0xfff, 0x448,
854 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x16a,
855 0xfff, 0x036, 0x38f, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
856 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x211,
857 0xfff, 0xfff, 0xfff, 0x230, 0xfff, 0xfff, 0x3ba, 0xfff,
858 0xfff, 0xfff, 0x3ce, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
859 0xfff, 0xfff, 0xfff, 0x229, 0xfff, 0x176, 0xfff, 0xfff,
860 0xfff, 0xfff, 0xfff, 0x00b, 0xfff, 0x162, 0x018, 0xfff,
861 0xfff, 0x233, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
862 0x400, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
863 0xfff, 0xfff, 0xfff, 0x12b, 0xfff, 0xfff, 0xfff, 0xfff,
864 0xfff, 0x3f4, 0xfff, 0x0f0, 0xfff, 0x1ac, 0xfff, 0xfff,
865 0x119, 0xfff, 0x2c0, 0xfff, 0xfff, 0xfff, 0x49b, 0xfff,
866 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x23c, 0xfff,
867 0x4b3, 0x010, 0x064, 0xfff, 0xfff, 0x4ba, 0xfff, 0xfff,
868 0xfff, 0xfff, 0xfff, 0x3c2, 0xfff, 0xfff, 0xfff, 0xfff,
869 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x006, 0x196, 0xfff,
870 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x100, 0x191, 0xfff,
871 0x1ea, 0x29f, 0xfff, 0xfff, 0xfff, 0x276, 0xfff, 0xfff,
872 0x2b1, 0x3b9, 0xfff, 0x03c, 0xfff, 0xfff, 0xfff, 0x180,
873 0xfff, 0x08f, 0xfff, 0xfff, 0x19e, 0x019, 0xfff, 0x0b0,
874 0x0fd, 0x332, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
875 0xfff, 0x06b, 0x2e8, 0xfff, 0x446, 0xfff, 0xfff, 0x004,
876 0x247, 0x197, 0xfff, 0x112, 0x169, 0x292, 0xfff, 0x302,
877 0xfff, 0xfff, 0x33b, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
878 0xfff, 0xfff, 0xfff, 0x287, 0x21f, 0xfff, 0x3ea, 0xfff,
879 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x4e7, 0xfff, 0xfff,
880 0xfff, 0xfff, 0xfff, 0x3a8, 0xfff, 0xfff, 0x2bc, 0xfff,
881 0x484, 0x296, 0xfff, 0x1c9, 0x08c, 0x1e5, 0x48a, 0xfff,
882 0x360, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
883 0x1ca, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
884 0xfff, 0xfff, 0xfff, 0x10d, 0xfff, 0xfff, 0xfff, 0xfff,
885 0xfff, 0xfff, 0x066, 0x2ea, 0x28b, 0x25b, 0xfff, 0x072,
886 0xfff, 0xfff, 0xfff, 0xfff, 0x2b6, 0xfff, 0xfff, 0x272,
887 0xfff, 0xfff, 0x525, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
888 0x2ca, 0xfff, 0xfff, 0xfff, 0x299, 0xfff, 0xfff, 0xfff,
889 0x558, 0x41a, 0xfff, 0x4f7, 0x557, 0xfff, 0x4a0, 0x344,
890 0x12c, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x125,
891 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
892 0x40e, 0xfff, 0xfff, 0x502, 0xfff, 0x103, 0x3e6, 0xfff,
893 0x527, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
894 0xfff, 0xfff, 0xfff, 0x45d, 0xfff, 0xfff, 0xfff, 0xfff,
895 0x44e, 0xfff, 0xfff, 0xfff, 0xfff, 0x0d2, 0x4c9, 0x35e,
896 0x459, 0x2d9, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x17d,
897 0x0c4, 0xfff, 0xfff, 0xfff, 0x3ac, 0x390, 0x094, 0xfff,
898 0x483, 0x0ab, 0xfff, 0x253, 0xfff, 0x391, 0xfff, 0xfff,
899 0xfff, 0xfff, 0x123, 0x0ef, 0xfff, 0xfff, 0xfff, 0x330,
900 0x38c, 0xfff, 0xfff, 0x2ae, 0xfff, 0xfff, 0xfff, 0x042,
901 0x012, 0x06d, 0xfff, 0xfff, 0xfff, 0x32a, 0x3db, 0x364,
902 0x2dc, 0xfff, 0x30f, 0x3d7, 0x4a5, 0x050, 0xfff, 0xfff,
903 0x029, 0xfff, 0xfff, 0xfff, 0xfff, 0x1d1, 0xfff, 0xfff,
904 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x480, 0xfff,
905 0x4ed, 0x081, 0x0a1, 0xfff, 0xfff, 0xfff, 0x30e, 0x52f,
906 0x257, 0xfff, 0xfff, 0x447, 0xfff, 0xfff, 0xfff, 0xfff,
907 0xfff, 0xfff, 0xfff, 0x401, 0x3cc, 0xfff, 0xfff, 0x0fb,
908 0x2c9, 0x42a, 0x314, 0x33e, 0x3bd, 0x318, 0xfff, 0x10e,
909 0x2a1, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x24c,
910 0x506, 0xfff, 0x267, 0xfff, 0xfff, 0x219, 0xfff, 0x1eb,
911 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
912 0x309, 0x3e2, 0x46c, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
913 0x384, 0xfff, 0xfff, 0xfff, 0xfff, 0x50c, 0xfff, 0x24b,
914 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x038,
915 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x194,
916 0x143, 0x3e3, 0xfff, 0xfff, 0xfff, 0x4c2, 0xfff, 0xfff,
917 0x0e1, 0x25c, 0xfff, 0x237, 0xfff, 0x1fe, 0xfff, 0xfff,
918 0xfff, 0x065, 0x2a4, 0xfff, 0x386, 0x55a, 0x11b, 0xfff,
919 0xfff, 0x192, 0xfff, 0x183, 0x00e, 0xfff, 0xfff, 0xfff,
920 0xfff, 0xfff, 0xfff, 0x4b2, 0x18e, 0xfff, 0xfff, 0xfff,
921 0xfff, 0x486, 0x4ef, 0x0c6, 0x380, 0xfff, 0x4a8, 0xfff,
922 0x0c5, 0xfff, 0xfff, 0xfff, 0xfff, 0x093, 0x1b8, 0xfff,
923 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x2e6,
924 0xfff, 0x0f3, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
925 0x28e, 0xfff, 0x53b, 0x420, 0x22a, 0x33a, 0xfff, 0x387,
926 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x2a3, 0xfff, 0xfff,
927 0xfff, 0x428, 0x500, 0xfff, 0xfff, 0x120, 0x2c6, 0x290,
928 0x2f5, 0x0e3, 0xfff, 0x0b7, 0xfff, 0x319, 0x474, 0xfff,
929 0xfff, 0xfff, 0x529, 0x014, 0xfff, 0x41b, 0x40a, 0x18b,
930 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x0d9,
931 0xfff, 0x38a, 0xfff, 0xfff, 0xfff, 0xfff, 0x1ce, 0xfff,
932 0xfff, 0xfff, 0xfff, 0xfff, 0x3b1, 0xfff, 0xfff, 0x05d,
933 0x2c4, 0xfff, 0xfff, 0x4af, 0xfff, 0x030, 0xfff, 0xfff,
934 0x203, 0xfff, 0x277, 0x256, 0xfff, 0xfff, 0xfff, 0x4f9,
935 0xfff, 0x2c7, 0xfff, 0x466, 0x016, 0x1cd, 0xfff, 0x167,
936 0xfff, 0xfff, 0x0c8, 0xfff, 0x43d, 0xfff, 0xfff, 0x020,
937 0xfff, 0xfff, 0x232, 0x1cb, 0x1e0, 0xfff, 0xfff, 0x347,
938 0xfff, 0x478, 0xfff, 0x365, 0xfff, 0xfff, 0xfff, 0xfff,
939 0x358, 0xfff, 0x10b, 0xfff, 0x35d, 0xfff, 0xfff, 0xfff,
940 0xfff, 0xfff, 0x452, 0x22d, 0xfff, 0xfff, 0x47d, 0xfff,
941 0x2f3, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x460, 0xfff,
942 0xfff, 0xfff, 0x50b, 0xfff, 0xfff, 0xfff, 0x2ec, 0xfff,
943 0xfff, 0xfff, 0xfff, 0xfff, 0x4b1, 0x422, 0xfff, 0xfff,
944 0xfff, 0x2d4, 0xfff, 0x239, 0xfff, 0xfff, 0xfff, 0x439,
945 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
946 0xfff, 0x491, 0x075, 0xfff, 0xfff, 0xfff, 0x06c, 0xfff,
947 0xfff, 0x0f9, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
948 0xfff, 0x139, 0xfff, 0x4f6, 0xfff, 0xfff, 0x409, 0xfff,
949 0xfff, 0x15b, 0xfff, 0xfff, 0x348, 0xfff, 0xfff, 0xfff,
950 0xfff, 0x4a2, 0x49d, 0xfff, 0x033, 0x175, 0xfff, 0x039,
951 0xfff, 0x312, 0x40c, 0xfff, 0xfff, 0x325, 0xfff, 0xfff,
952 0xfff, 0xfff, 0xfff, 0xfff, 0x4aa, 0xfff, 0xfff, 0xfff,
953 0xfff, 0xfff, 0xfff, 0x165, 0x3bc, 0x48c, 0x310, 0x096,
954 0xfff, 0xfff, 0x250, 0x1a2, 0xfff, 0xfff, 0xfff, 0xfff,
955 0x20d, 0x2ac, 0xfff, 0xfff, 0x39b, 0xfff, 0x377, 0xfff,
956 0x512, 0x495, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
957 0xfff, 0xfff, 0xfff, 0xfff, 0x357, 0x4ea, 0xfff, 0xfff,
958 0xfff, 0xfff, 0x198, 0xfff, 0xfff, 0xfff, 0x434, 0x04a,
959 0xfff, 0xfff, 0xfff, 0xfff, 0x062, 0xfff, 0x1d6, 0x1c8,
960 0xfff, 0x1f3, 0x281, 0xfff, 0x462, 0xfff, 0xfff, 0xfff,
961 0x4b0, 0xfff, 0x207, 0xfff, 0xfff, 0xfff, 0xfff, 0x3dd,
962 0xfff, 0xfff, 0x55d, 0xfff, 0x552, 0x494, 0x1af, 0xfff,
963 0xfff, 0xfff, 0xfff, 0xfff, 0x227, 0xfff, 0xfff, 0x069,
964 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x43e,
965 0x0b5, 0xfff, 0x524, 0x2d2, 0xfff, 0xfff, 0xfff, 0x28f,
966 0xfff, 0x01b, 0x50e, 0xfff, 0xfff, 0x1bb, 0xfff, 0xfff,
967 0x41d, 0xfff, 0x32e, 0x48e, 0xfff, 0x1f7, 0x224, 0xfff,
968 0xfff, 0xfff, 0xfff, 0xfff, 0x394, 0xfff, 0xfff, 0xfff,
969 0xfff, 0x52c, 0xfff, 0xfff, 0xfff, 0x392, 0xfff, 0x1e7,
970 0xfff, 0xfff, 0x3f9, 0x3a7, 0xfff, 0x51f, 0xfff, 0x0bb,
971 0x118, 0x3ca, 0xfff, 0x1dd, 0xfff, 0x48b, 0xfff, 0xfff,
972 0xfff, 0xfff, 0x50f, 0xfff, 0x0d6, 0xfff, 0x1fa, 0xfff,
973 0x11e, 0xfff, 0xfff, 0xfff, 0xfff, 0x4d7, 0xfff, 0x078,
974 0x008, 0xfff, 0x25d, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
975 0x032, 0x33c, 0xfff, 0x4d9, 0x160, 0xfff, 0xfff, 0x300,
976 0x0b1, 0xfff, 0x322, 0xfff, 0x4ec, 0xfff, 0xfff, 0x200,
977 0x00c, 0x369, 0x473, 0xfff, 0xfff, 0x32c, 0xfff, 0xfff,
978 0xfff, 0xfff, 0xfff, 0xfff, 0x53e, 0x3d4, 0x417, 0xfff,
979 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
980 0x34b, 0x001, 0x39a, 0x02c, 0xfff, 0xfff, 0x2ce, 0x00f,
981 0xfff, 0x0ba, 0xfff, 0xfff, 0xfff, 0xfff, 0x060, 0xfff,
982 0x406, 0xfff, 0xfff, 0xfff, 0x4ee, 0x4ac, 0xfff, 0x43f,
983 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x29b, 0xfff, 0xfff,
984 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x216,
985 0x190, 0xfff, 0x396, 0x464, 0xfff, 0xfff, 0x323, 0xfff,
986 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x2e9, 0xfff, 0x26d,
987 0x2cd, 0x040, 0xfff, 0xfff, 0xfff, 0xfff, 0x38b, 0x3c0,
988 0xfff, 0xfff, 0xfff, 0x1f2, 0xfff, 0x0ea, 0xfff, 0xfff,
989 0x472, 0xfff, 0x1fb, 0xfff, 0xfff, 0x0af, 0x27f, 0xfff,
990 0xfff, 0xfff, 0x479, 0x023, 0xfff, 0x0d8, 0x3b3, 0xfff,
991 0xfff, 0xfff, 0x121, 0xfff, 0xfff, 0x3bf, 0xfff, 0xfff,
992 0x16b, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
993 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
994 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
995 0x45a, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
996 0xfff, 0x0be, 0xfff, 0xfff, 0xfff, 0x111, 0xfff, 0x220,
997 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
998 0xfff, 0xfff, 0x09b, 0x218, 0xfff, 0x022, 0x202, 0xfff,
999 0x4c8, 0xfff, 0x0ed, 0xfff, 0xfff, 0x182, 0xfff, 0xfff,
1000 0xfff, 0x17f, 0x213, 0xfff, 0x321, 0x36a, 0xfff, 0x086,
1001 0xfff, 0xfff, 0xfff, 0x43b, 0x088, 0xfff, 0xfff, 0xfff,
1002 0xfff, 0x26c, 0xfff, 0x2f8, 0x3b4, 0xfff, 0xfff, 0xfff,
1003 0x132, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x333, 0x444,
1004 0x0c1, 0x4d8, 0x46d, 0x264, 0xfff, 0xfff, 0xfff, 0xfff,
1005 0x426, 0xfff, 0xfff, 0xfff, 0xfff, 0x2fe, 0xfff, 0xfff,
1006 0xfff, 0xfff, 0x011, 0xfff, 0x05f, 0xfff, 0xfff, 0xfff,
1007 0xfff, 0x10c, 0x101, 0xfff, 0xfff, 0xfff, 0xfff, 0x110,
1008 0xfff, 0x044, 0x304, 0x361, 0x404, 0xfff, 0x51b, 0x099,
1009 0xfff, 0x440, 0xfff, 0xfff, 0xfff, 0x222, 0xfff, 0xfff,
1010 0xfff, 0xfff, 0x1b5, 0xfff, 0x136, 0x430, 0xfff, 0x1da,
1011 0xfff, 0xfff, 0xfff, 0x043, 0xfff, 0x17c, 0xfff, 0xfff,
1012 0xfff, 0x01c, 0xfff, 0xfff, 0xfff, 0x425, 0x236, 0xfff,
1013 0x317, 0xfff, 0xfff, 0x437, 0x3fc, 0xfff, 0x1f1, 0xfff,
1014 0x324, 0xfff, 0xfff, 0x0ca, 0x306, 0xfff, 0x548, 0xfff,
1015 0x46e, 0xfff, 0xfff, 0xfff, 0x4b8, 0x1c2, 0x286, 0xfff,
1016 0xfff, 0x087, 0x18a, 0x19f, 0xfff, 0xfff, 0xfff, 0xfff,
1017 0x18c, 0xfff, 0x215, 0xfff, 0xfff, 0xfff, 0xfff, 0x283,
1018 0xfff, 0xfff, 0xfff, 0x126, 0xfff, 0xfff, 0x370, 0xfff,
1019 0x53f, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0x31c, 0xfff,
1020 0x4d1, 0xfff, 0xfff, 0xfff, 0x021, 0xfff, 0x157, 0xfff,
1021 0xfff, 0x028, 0x16e, 0xfff, 0x421, 0xfff, 0x1c6, 0xfff,
1022 0xfff, 0x511, 0xfff, 0xfff, 0x39c, 0x46f, 0x1b2, 0xfff,
1023 0xfff, 0x316, 0xfff, 0xfff, 0x009, 0xfff, 0xfff, 0x195,
1024 0xfff, 0x240, 0x546, 0xfff, 0xfff, 0x520, 0xfff, 0xfff,
1025 0xfff, 0xfff, 0xfff, 0xfff, 0x454, 0xfff, 0xfff, 0xfff,
1026 0x3f3, 0xfff, 0xfff, 0x187, 0xfff, 0x4a9, 0xfff, 0xfff,
1027 0xfff, 0xfff, 0xfff, 0xfff, 0x51c, 0x453, 0x1e6, 0xfff,
1028 0xfff, 0xfff, 0x1b0, 0xfff, 0x477, 0xfff, 0xfff, 0xfff,
1029 0x4fe, 0xfff, 0x32f, 0xfff, 0xfff, 0x15e, 0x1d4, 0xfff,
1030 0x0e5, 0xfff, 0xfff, 0xfff, 0x242, 0x14b, 0x046, 0xfff,
1031 0x3f6, 0x3bb, 0x3e4, 0xfff, 0xfff, 0x2e3, 0xfff, 0x245,
1032 0xfff, 0x149, 0xfff, 0xfff, 0xfff, 0x2db, 0xfff, 0xfff,
1033 0x181, 0xfff, 0x089, 0x2c5, 0xfff, 0x1f5, 0xfff, 0x2d6,
1034 0x507, 0xfff, 0x42d, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
1035 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
1036 0x080, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff, 0xfff,
1037 0xfff, 0xfff, 0xfff, 0xfff, 0x3c3, 0x320, 0xfff, 0x1e1,
1038 0xfff, 0x0f5, 0x13b, 0xfff, 0xfff, 0xfff, 0x003, 0x4da,
1039 0xfff, 0xfff, 0xfff, 0x42c, 0xfff, 0xfff, 0x0cb, 0xfff,
1040 0x536, 0x2c3, 0xfff, 0xfff, 0xfff, 0xfff, 0x199, 0xfff,
1041 0xfff, 0x0c0, 0xfff, 0x01e, 0x497, 0xfff, 0xfff, 0x3e5,
1042 0xfff, 0xfff, 0xfff, 0x0cf, 0xfff, 0x2bd, 0xfff, 0x223,
1043 0xfff, 0x3ff, 0xfff, 0x058, 0x174, 0x3ef, 0xfff, 0x002
1044 };
1045
1046 static unsigned short err_pos(unsigned short din)
1047 {
1048 BUG_ON(din >= ARRAY_SIZE(err_pos_lut));
1049 return err_pos_lut[din];
1050 }
1051 static int chk_no_err_only(unsigned short *chk_syndrome_list, unsigned short *err_info)
1052 {
1053 if ((chk_syndrome_list[0] | chk_syndrome_list[1] |
1054 chk_syndrome_list[2] | chk_syndrome_list[3] |
1055 chk_syndrome_list[4] | chk_syndrome_list[5] |
1056 chk_syndrome_list[6] | chk_syndrome_list[7]) != 0x0) {
1057 return -EINVAL;
1058 } else {
1059 err_info[0] = 0x0;
1060 return 0;
1061 }
1062 }
1063 static int chk_1_err_only(unsigned short *chk_syndrome_list, unsigned short *err_info)
1064 {
1065 unsigned short tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6;
1066 tmp0 = gf4096_mul(chk_syndrome_list[1], gf4096_inv(chk_syndrome_list[0]));
1067 tmp1 = gf4096_mul(chk_syndrome_list[2], gf4096_inv(chk_syndrome_list[1]));
1068 tmp2 = gf4096_mul(chk_syndrome_list[3], gf4096_inv(chk_syndrome_list[2]));
1069 tmp3 = gf4096_mul(chk_syndrome_list[4], gf4096_inv(chk_syndrome_list[3]));
1070 tmp4 = gf4096_mul(chk_syndrome_list[5], gf4096_inv(chk_syndrome_list[4]));
1071 tmp5 = gf4096_mul(chk_syndrome_list[6], gf4096_inv(chk_syndrome_list[5]));
1072 tmp6 = gf4096_mul(chk_syndrome_list[7], gf4096_inv(chk_syndrome_list[6]));
1073 if ((tmp0 == tmp1) & (tmp1 == tmp2) & (tmp2 == tmp3) & (tmp3 == tmp4) & (tmp4 == tmp5) & (tmp5 == tmp6)) {
1074 err_info[0] = 0x1; // encode 1-symbol error as 0x1
1075 err_info[1] = err_pos(tmp0);
1076 err_info[1] = (unsigned short)(0x55e - err_info[1]);
1077 err_info[5] = chk_syndrome_list[0];
1078 return 0;
1079 } else
1080 return -EINVAL;
1081 }
1082 static int chk_2_err_only(unsigned short *chk_syndrome_list, unsigned short *err_info)
1083 {
1084 unsigned short tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
1085 unsigned short coefs[4];
1086 unsigned short err_pats[4];
1087 int found_num_root = 0;
1088 unsigned short bit2_root0, bit2_root1;
1089 unsigned short bit2_root0_inv, bit2_root1_inv;
1090 unsigned short err_loc_eqn, test_root;
1091 unsigned short bit2_loc0, bit2_loc1;
1092 unsigned short bit2_pat0, bit2_pat1;
1093
1094 find_2x2_soln(chk_syndrome_list[1],
1095 chk_syndrome_list[0],
1096 chk_syndrome_list[2], chk_syndrome_list[1], chk_syndrome_list[2], chk_syndrome_list[3], coefs);
1097 for (test_root = 0x1; test_root < 0xfff; test_root++) {
1098 err_loc_eqn =
1099 gf4096_mul(coefs[1], gf4096_mul(test_root, test_root)) ^ gf4096_mul(coefs[0], test_root) ^ 0x1;
1100 if (err_loc_eqn == 0x0) {
1101 if (found_num_root == 0) {
1102 bit2_root0 = test_root;
1103 found_num_root = 1;
1104 } else if (found_num_root == 1) {
1105 bit2_root1 = test_root;
1106 found_num_root = 2;
1107 break;
1108 }
1109 }
1110 }
1111 if (found_num_root != 2)
1112 return -EINVAL;
1113 else {
1114 bit2_root0_inv = gf4096_inv(bit2_root0);
1115 bit2_root1_inv = gf4096_inv(bit2_root1);
1116 find_2bit_err_pats(chk_syndrome_list[0],
1117 chk_syndrome_list[1], bit2_root0_inv, bit2_root1_inv, err_pats);
1118 bit2_pat0 = err_pats[0];
1119 bit2_pat1 = err_pats[1];
1120 //for(x+1)
1121 tmp0 = gf4096_mul(gf4096_mul(bit2_root0_inv, bit2_root0_inv), gf4096_mul(bit2_root0_inv, bit2_root0_inv)); //rinv0^4
1122 tmp1 = gf4096_mul(bit2_root0_inv, tmp0); //rinv0^5
1123 tmp2 = gf4096_mul(bit2_root0_inv, tmp1); //rinv0^6
1124 tmp3 = gf4096_mul(bit2_root0_inv, tmp2); //rinv0^7
1125 tmp4 = gf4096_mul(gf4096_mul(bit2_root1_inv, bit2_root1_inv), gf4096_mul(bit2_root1_inv, bit2_root1_inv)); //rinv1^4
1126 tmp5 = gf4096_mul(bit2_root1_inv, tmp4); //rinv1^5
1127 tmp6 = gf4096_mul(bit2_root1_inv, tmp5); //rinv1^6
1128 tmp7 = gf4096_mul(bit2_root1_inv, tmp6); //rinv1^7
1129 //check if only 2-bit error
1130 if ((chk_syndrome_list[4] ==
1131 (gf4096_mul(bit2_pat0, tmp0) ^
1132 gf4096_mul(bit2_pat1,
1133 tmp4))) & (chk_syndrome_list[5] ==
1134 (gf4096_mul(bit2_pat0, tmp1) ^
1135 gf4096_mul(bit2_pat1,
1136 tmp5))) &
1137 (chk_syndrome_list[6] ==
1138 (gf4096_mul(bit2_pat0, tmp2) ^
1139 gf4096_mul(bit2_pat1,
1140 tmp6))) & (chk_syndrome_list[7] ==
1141 (gf4096_mul(bit2_pat0, tmp3) ^ gf4096_mul(bit2_pat1, tmp7)))) {
1142 if ((err_pos(bit2_root0_inv) == 0xfff) | (err_pos(bit2_root1_inv) == 0xfff)) {
1143 return -EINVAL;
1144 } else {
1145 bit2_loc0 = 0x55e - err_pos(bit2_root0_inv);
1146 bit2_loc1 = 0x55e - err_pos(bit2_root1_inv);
1147 err_info[0] = 0x2; // encode 2-symbol error as 0x2
1148 err_info[1] = bit2_loc0;
1149 err_info[2] = bit2_loc1;
1150 err_info[5] = bit2_pat0;
1151 err_info[6] = bit2_pat1;
1152 return 0;
1153 }
1154 } else
1155 return -EINVAL;
1156 }
1157 }
1158 static int chk_3_err_only(unsigned short *chk_syndrome_list, unsigned short *err_info)
1159 {
1160 unsigned short tmp0, tmp1, tmp2, tmp3, tmp4, tmp5;
1161 unsigned short coefs[4];
1162 unsigned short err_pats[4];
1163 int found_num_root = 0;
1164 unsigned short bit3_root0, bit3_root1, bit3_root2;
1165 unsigned short bit3_root0_inv, bit3_root1_inv, bit3_root2_inv;
1166 unsigned short err_loc_eqn, test_root;
1167
1168 find_3bit_err_coefs(chk_syndrome_list[0], chk_syndrome_list[1],
1169 chk_syndrome_list[2], chk_syndrome_list[3],
1170 chk_syndrome_list[4], chk_syndrome_list[5], coefs);
1171
1172 for (test_root = 0x1; test_root < 0xfff; test_root++) {
1173 err_loc_eqn = gf4096_mul(coefs[2],
1174 gf4096_mul(gf4096_mul(test_root, test_root),
1175 test_root)) ^ gf4096_mul(coefs[1], gf4096_mul(test_root, test_root))
1176 ^ gf4096_mul(coefs[0], test_root) ^ 0x1;
1177
1178 if (err_loc_eqn == 0x0) {
1179 if (found_num_root == 0) {
1180 bit3_root0 = test_root;
1181 found_num_root = 1;
1182 } else if (found_num_root == 1) {
1183 bit3_root1 = test_root;
1184 found_num_root = 2;
1185 } else if (found_num_root == 2) {
1186 bit3_root2 = test_root;
1187 found_num_root = 3;
1188 break;
1189 }
1190 }
1191 }
1192 if (found_num_root != 3)
1193 return -EINVAL;
1194 else {
1195 bit3_root0_inv = gf4096_inv(bit3_root0);
1196 bit3_root1_inv = gf4096_inv(bit3_root1);
1197 bit3_root2_inv = gf4096_inv(bit3_root2);
1198
1199 find_3bit_err_pats(chk_syndrome_list[0], chk_syndrome_list[1],
1200 chk_syndrome_list[2], bit3_root0_inv,
1201 bit3_root1_inv, bit3_root2_inv, err_pats);
1202
1203 //check if only 3-bit error
1204 tmp0 = gf4096_mul(bit3_root0_inv, bit3_root0_inv);
1205 tmp0 = gf4096_mul(tmp0, tmp0);
1206 tmp0 = gf4096_mul(tmp0, bit3_root0_inv);
1207 tmp0 = gf4096_mul(tmp0, bit3_root0_inv); //rinv0^6
1208 tmp1 = gf4096_mul(tmp0, bit3_root0_inv); //rinv0^7
1209 tmp2 = gf4096_mul(bit3_root1_inv, bit3_root1_inv);
1210 tmp2 = gf4096_mul(tmp2, tmp2);
1211 tmp2 = gf4096_mul(tmp2, bit3_root1_inv);
1212 tmp2 = gf4096_mul(tmp2, bit3_root1_inv); //rinv1^6
1213 tmp3 = gf4096_mul(tmp2, bit3_root1_inv); //rinv1^7
1214 tmp4 = gf4096_mul(bit3_root2_inv, bit3_root2_inv);
1215 tmp4 = gf4096_mul(tmp4, tmp4);
1216 tmp4 = gf4096_mul(tmp4, bit3_root2_inv);
1217 tmp4 = gf4096_mul(tmp4, bit3_root2_inv); //rinv2^6
1218 tmp5 = gf4096_mul(tmp4, bit3_root2_inv); //rinv2^7
1219
1220 //check if only 3 errors
1221 if ((chk_syndrome_list[6] == (gf4096_mul(err_pats[0], tmp0) ^
1222 gf4096_mul(err_pats[1], tmp2) ^
1223 gf4096_mul(err_pats[2], tmp4))) &
1224 (chk_syndrome_list[7] == (gf4096_mul(err_pats[0], tmp1) ^
1225 gf4096_mul(err_pats[1], tmp3) ^ gf4096_mul(err_pats[2], tmp5)))) {
1226 if ((err_pos(bit3_root0_inv) == 0xfff) |
1227 (err_pos(bit3_root1_inv) == 0xfff) | (err_pos(bit3_root2_inv) == 0xfff)) {
1228 return -EINVAL;
1229 } else {
1230 err_info[0] = 0x3;
1231 err_info[1] = (0x55e - err_pos(bit3_root0_inv));
1232 err_info[2] = (0x55e - err_pos(bit3_root1_inv));
1233 err_info[3] = (0x55e - err_pos(bit3_root2_inv));
1234 err_info[5] = err_pats[0];
1235 err_info[6] = err_pats[1];
1236 err_info[7] = err_pats[2];
1237 return 0;
1238 }
1239 } else
1240 return -EINVAL;
1241 }
1242 }
1243 static int chk_4_err_only(unsigned short *chk_syndrome_list, unsigned short *err_info)
1244 {
1245 unsigned short coefs[4];
1246 unsigned short err_pats[4];
1247 int found_num_root = 0;
1248 unsigned short bit4_root0, bit4_root1, bit4_root2, bit4_root3;
1249 unsigned short bit4_root0_inv, bit4_root1_inv, bit4_root2_inv, bit4_root3_inv;
1250 unsigned short err_loc_eqn, test_root;
1251
1252 find_4bit_err_coefs(chk_syndrome_list[0],
1253 chk_syndrome_list[1],
1254 chk_syndrome_list[2],
1255 chk_syndrome_list[3],
1256 chk_syndrome_list[4],
1257 chk_syndrome_list[5], chk_syndrome_list[6], chk_syndrome_list[7], coefs);
1258
1259 for (test_root = 0x1; test_root < 0xfff; test_root++) {
1260 err_loc_eqn =
1261 gf4096_mul(coefs[3],
1262 gf4096_mul(gf4096_mul
1263 (gf4096_mul(test_root, test_root),
1264 test_root),
1265 test_root)) ^ gf4096_mul(coefs[2],
1266 gf4096_mul
1267 (gf4096_mul(test_root, test_root), test_root))
1268 ^ gf4096_mul(coefs[1], gf4096_mul(test_root, test_root)) ^ gf4096_mul(coefs[0], test_root)
1269 ^ 0x1;
1270 if (err_loc_eqn == 0x0) {
1271 if (found_num_root == 0) {
1272 bit4_root0 = test_root;
1273 found_num_root = 1;
1274 } else if (found_num_root == 1) {
1275 bit4_root1 = test_root;
1276 found_num_root = 2;
1277 } else if (found_num_root == 2) {
1278 bit4_root2 = test_root;
1279 found_num_root = 3;
1280 } else {
1281 found_num_root = 4;
1282 bit4_root3 = test_root;
1283 break;
1284 }
1285 }
1286 }
1287 if (found_num_root != 4) {
1288 return -EINVAL;
1289 } else {
1290 bit4_root0_inv = gf4096_inv(bit4_root0);
1291 bit4_root1_inv = gf4096_inv(bit4_root1);
1292 bit4_root2_inv = gf4096_inv(bit4_root2);
1293 bit4_root3_inv = gf4096_inv(bit4_root3);
1294 find_4bit_err_pats(chk_syndrome_list[0],
1295 chk_syndrome_list[1],
1296 chk_syndrome_list[2],
1297 chk_syndrome_list[3],
1298 bit4_root0_inv, bit4_root1_inv, bit4_root2_inv, bit4_root3_inv, err_pats);
1299 err_info[0] = 0x4;
1300 err_info[1] = (0x55e - err_pos(bit4_root0_inv));
1301 err_info[2] = (0x55e - err_pos(bit4_root1_inv));
1302 err_info[3] = (0x55e - err_pos(bit4_root2_inv));
1303 err_info[4] = (0x55e - err_pos(bit4_root3_inv));
1304 err_info[5] = err_pats[0];
1305 err_info[6] = err_pats[1];
1306 err_info[7] = err_pats[2];
1307 err_info[8] = err_pats[3];
1308 return 0;
1309 }
1310 }
1311
1312 void correct_12bit_symbol(unsigned char *buf, unsigned short sym,
1313 unsigned short val)
1314 {
1315 if (unlikely(sym > 1366)) {
1316 printk(KERN_ERR "Error: symbol %d out of range; cannot correct\n", sym);
1317 } else if (sym == 0) {
1318 buf[0] ^= val;
1319 } else if (sym & 1) {
1320 buf[1+(3*(sym-1))/2] ^= (val >> 4);
1321 buf[2+(3*(sym-1))/2] ^= ((val & 0xf) << 4);
1322 } else {
1323 buf[2+(3*(sym-2))/2] ^= (val >> 8);
1324 buf[3+(3*(sym-2))/2] ^= (val & 0xff);
1325 }
1326 }
1327
1328 static int debugecc = 0;
1329 module_param(debugecc, int, 0644);
1330
1331 int cafe_correct_ecc(unsigned char *buf,
1332 unsigned short *chk_syndrome_list)
1333 {
1334 unsigned short err_info[9];
1335 int i;
1336
1337 if (debugecc) {
1338 printk(KERN_WARNING "cafe_correct_ecc invoked. Syndromes %x %x %x %x %x %x %x %x\n",
1339 chk_syndrome_list[0], chk_syndrome_list[1],
1340 chk_syndrome_list[2], chk_syndrome_list[3],
1341 chk_syndrome_list[4], chk_syndrome_list[5],
1342 chk_syndrome_list[6], chk_syndrome_list[7]);
1343 for (i=0; i < 2048; i+=16) {
1344 printk(KERN_WARNING "D %04x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
1345 i,
1346 buf[i], buf[i+1], buf[i+2], buf[i+3],
1347 buf[i+4], buf[i+5], buf[i+6], buf[i+7],
1348 buf[i+8], buf[i+9], buf[i+10], buf[i+11],
1349 buf[i+12], buf[i+13], buf[i+14], buf[i+15]);
1350 }
1351 for ( ; i < 2112; i+=16) {
1352 printk(KERN_WARNING "O %02x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
1353 i - 2048,
1354 buf[i], buf[i+1], buf[i+2], buf[i+3],
1355 buf[i+4], buf[i+5], buf[i+6], buf[i+7],
1356 buf[i+8], buf[i+9], buf[i+10], buf[i+11],
1357 buf[i+12], buf[i+13], buf[i+14], buf[i+15]);
1358 }
1359 }
1360
1361
1362
1363 if (chk_no_err_only(chk_syndrome_list, err_info) &&
1364 chk_1_err_only(chk_syndrome_list, err_info) &&
1365 chk_2_err_only(chk_syndrome_list, err_info) &&
1366 chk_3_err_only(chk_syndrome_list, err_info) &&
1367 chk_4_err_only(chk_syndrome_list, err_info)) {
1368 return -EIO;
1369 }
1370
1371 for (i=0; i < err_info[0]; i++) {
1372 if (debugecc)
1373 printk(KERN_WARNING "Correct symbol %d with 0x%03x\n",
1374 err_info[1+i], err_info[5+i]);
1375
1376 correct_12bit_symbol(buf, err_info[1+i], err_info[5+i]);
1377 }
1378
1379 return err_info[0];
1380 }
1381
WRT350N Kernel Patches