openwrt/upstream - upstream openwrt

about summary refs log tree commit diff stats

path: root/package/kernel/modules/i2c.mk

diff options

author	Felix Fietkau <nbd@openwrt.org>	2007-11-17 14:14:16 +0000
committer	Felix Fietkau <nbd@openwrt.org>	2007-11-17 14:14:16 +0000
commit	4235aee8c25e5725d40fdd1a2b22f1807bda26bd (patch)
tree	0dd72777d1961660a008abfd75ccf04914d43a4f /package/kernel/modules/i2c.mk
parent	992e1f5e0476b90b6371de3413f493ee03ecdb29 (diff)
download	upstream-4235aee8c25e5725d40fdd1a2b22f1807bda26bd.tar.gz upstream-4235aee8c25e5725d40fdd1a2b22f1807bda26bd.tar.bz2 upstream-4235aee8c25e5725d40fdd1a2b22f1807bda26bd.zip

fix hostapd rebuild check, isolate the common src/ directory for hostapd variants as well to fix compile errors when both variants are selected (#2722)

SVN-Revision: 9575

Diffstat (limited to 'package/kernel/modules/i2c.mk')

0 files changed, 0 insertions, 0 deletions

> 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553

/******************************************************************************
 * arch/x86/x86_32/seg_fixup.c
 * 
 * Support for -ve accesses to pseudo-4GB segments.
 * 
 * Copyright (c) 2004, K A Fraser
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <xen/config.h>
#include <xen/init.h>
#include <xen/sched.h>
#include <xen/lib.h>
#include <xen/errno.h>
#include <xen/mm.h>
#include <xen/perfc.h>
#include <asm/current.h>
#include <asm/processor.h>
#include <asm/regs.h>
#include <asm/x86_emulate.h>

/* General instruction properties. */
#define INSN_SUFFIX_BYTES (7)
#define OPCODE_BYTE       (1<<4)  
#define HAS_MODRM         (1<<5)

/* Short forms for the table. */
#define X  0 /* invalid for some random reason */
#define O  OPCODE_BYTE
#define M  HAS_MODRM

static unsigned char insn_decode[256] = {
    /* 0x00 - 0x0F */
    O|M, O|M, O|M, O|M, X, X, X, X,
    O|M, O|M, O|M, O|M, X, X, X, X,
    /* 0x10 - 0x1F */
    O|M, O|M, O|M, O|M, X, X, X, X,
    O|M, O|M, O|M, O|M, X, X, X, X,
    /* 0x20 - 0x2F */
    O|M, O|M, O|M, O|M, X, X, X, X,
    O|M, O|M, O|M, O|M, X, X, X, X,
    /* 0x30 - 0x3F */
    O|M, O|M, O|M, O|M, X, X, X, X,
    O|M, O|M, O|M, O|M, X, X, X, X,
    /* 0x40 - 0x4F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x50 - 0x5F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x60 - 0x6F */
    X, X, X, X, X, X, X, X,
    X, O|M|4, X, O|M|1, X, X, X, X,
    /* 0x70 - 0x7F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x80 - 0x8F */
    O|M|1, O|M|4, O|M|1, O|M|1, O|M, O|M, O|M, O|M,
    O|M, O|M, O|M, O|M, O|M, O|M, O|M, X,
    /* 0x90 - 0x9F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xA0 - 0xAF */
    O|4, O|4, O|4, O|4, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xB0 - 0xBF */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xC0 - 0xCF */
    O|M|1, O|M|1, X, X, X, X, O|M|1, O|M|4,
    X, X, X, X, X, X, X, X,
    /* 0xD0 - 0xDF */
    O|M, O|M, O|M, O|M, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xE0 - 0xEF */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xF0 - 0xFF */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, O|M, O|M
};

static unsigned char twobyte_decode[256] = {
    /* 0x00 - 0x0F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x10 - 0x1F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x20 - 0x2F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x30 - 0x3F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x40 - 0x4F */
    O|M, O|M, O|M, O|M, O|M, O|M, O|M, O|M,
    O|M, O|M, O|M, O|M, O|M, O|M, O|M, O|M,
    /* 0x50 - 0x5F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x60 - 0x6F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x70 - 0x7F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x80 - 0x8F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0x90 - 0x9F */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xA0 - 0xAF */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xB0 - 0xBF */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xC0 - 0xCF */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xD0 - 0xDF */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xE0 - 0xEF */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X,
    /* 0xF0 - 0xFF */
    X, X, X, X, X, X, X, X,
    X, X, X, X, X, X, X, X
};

/*
 * Obtain the base and limit associated with the given segment selector.
 * The selector must identify a 32-bit code or data segment. Any segment that
 * appears to be truncated to not overlap with Xen is assumed to be a truncated
 * 4GB segment, and the returned limit reflects this.
 *  @seg   (IN) : Segment selector to decode.
 *  @base  (OUT): Decoded linear base address.
 *  @limit (OUT): Decoded segment limit, in bytes. 0 == unlimited (4GB).
 */
int get_baselimit(u16 seg, unsigned long *base, unsigned long *limit)
{
    struct vcpu *d = current;
    unsigned long *table, a, b;
    int            ldt = !!(seg & 4);
    int            idx = (seg >> 3) & 8191;

    /* Get base and check limit. */
    if ( ldt )
    {
        table = (unsigned long *)LDT_VIRT_START(d);
        if ( idx >= d->arch.guest_context.ldt_ents )
            goto fail;
    }
    else /* gdt */
    {
        table = (unsigned long *)GDT_VIRT_START(d);
        if ( idx >= d->arch.guest_context.gdt_ents )
            goto fail;
    }

    /* Grab the segment descriptor. */
    if ( __get_user(a, &table[2*idx+0]) ||
         __get_user(b, &table[2*idx+1]) )
        goto fail; /* Barking up the wrong tree. Decode needs a page fault.*/

    /* We only parse 32-bit code and data segments. */
    if ( (b & (_SEGMENT_P|_SEGMENT_S|_SEGMENT_DB)) != 
         (_SEGMENT_P|_SEGMENT_S|_SEGMENT_DB) )
        goto fail;

    /* Decode base and limit. */
    *base  = (b&(0xff<<24)) | ((b&0xff)<<16) | (a>>16);
    *limit = ((b & 0xf0000) | (a & 0x0ffff)) + 1;
    if ( (b & _SEGMENT_G) )
        *limit <<= 12;

    /*
     * Anything that looks like a truncated segment we assume ought really
     * to be a 4GB segment. DANGER!
     */
    if ( (GUEST_SEGMENT_MAX_ADDR - (*base + *limit)) < PAGE_SIZE )
        *limit = 0;

    return 1;

 fail:
    return 0;
}

/* Turn a segment+offset into a linear address. */
int linearise_address(u16 seg, unsigned long off, unsigned long *linear)
{
    unsigned long base, limit;

    if ( !get_baselimit(seg, &base, &limit) )
        return 0;

    if ( off > (limit-1) )
        return 0;

    *linear = base + off;

    return 1;
}

int fixup_seg(u16 seg, unsigned long offset)
{
    struct vcpu *d = current;
    unsigned long *table, a, b, base, limit;
    int            ldt = !!(seg & 4);
    int            idx = (seg >> 3) & 8191;

    /* Get base and check limit. */
    if ( ldt )
    {
        table = (unsigned long *)LDT_VIRT_START(d);
        if ( idx >= d->arch.guest_context.ldt_ents )
        {
            dprintk(XENLOG_DEBUG, "Segment %04x out of LDT range (%ld)\n",
                    seg, d->arch.guest_context.ldt_ents);
            goto fail;
        }
    }
    else /* gdt */
    {
        table = (unsigned long *)GDT_VIRT_START(d);
        if ( idx >= d->arch.guest_context.gdt_ents )
        {
            dprintk(XENLOG_DEBUG, "Segment %04x out of GDT range (%ld)\n",
                    seg, d->arch.guest_context.gdt_ents);
            goto fail;
        }
    }

    /* Grab the segment descriptor. */
    if ( __get_user(a, &table[2*idx+0]) ||
         __get_user(b, &table[2*idx+1]) )
    {
        dprintk(XENLOG_DEBUG, "Fault while reading segment %04x\n", seg);
        goto fail; /* Barking up the wrong tree. Decode needs a page fault.*/
    }

    /* We only parse 32-bit page-granularity non-privileged data segments. */
    if ( (b & (_SEGMENT_P|_SEGMENT_S|_SEGMENT_DB|
               _SEGMENT_G|_SEGMENT_CODE|_SEGMENT_DPL)) != 
         (_SEGMENT_P|_SEGMENT_S|_SEGMENT_DB|_SEGMENT_G|_SEGMENT_DPL) )
    {
        dprintk(XENLOG_DEBUG, "Bad segment %08lx:%08lx\n", a, b);
        goto fail;
    }

    /* Decode base and limit. */
    base  = (b&(0xff<<24)) | ((b&0xff)<<16) | (a>>16);
    limit = (((b & 0xf0000) | (a & 0x0ffff)) + 1) << 12;

    if ( b & _SEGMENT_EC )
    {
        /* Expands-down: All the way to zero? Assume 4GB if so. */
        if ( ((base + limit) < PAGE_SIZE) && (offset <= limit)  )
        {
            /* Flip to expands-up. */
            limit = GUEST_SEGMENT_MAX_ADDR - base;
            goto flip;
        }
    }
    else
    {
        /* Expands-up: All the way to Xen space? Assume 4GB if so. */
        if ( ((GUEST_SEGMENT_MAX_ADDR - (base + limit)) < PAGE_SIZE) &&
             (offset > limit) )
        {
            /* Flip to expands-down. */
            limit = -(base & PAGE_MASK);
            goto flip;
        }
    }

    dprintk(XENLOG_DEBUG, "None of the above! "
            "(%08lx:%08lx, %08lx, %08lx, %08lx)\n",
            a, b, base, limit, base+limit);

 fail:
    return 0;

 flip:
    limit = (limit >> 12) - 1;
    a &= ~0x0ffff; a |= limit & 0x0ffff;
    b &= ~0xf0000; b |= limit & 0xf0000;
    b ^= _SEGMENT_EC; /* grows-up <-> grows-down */
    /* NB. These can't fault. Checked readable above; must also be writable. */
    table[2*idx+0] = a;
    table[2*idx+1] = b;
    return 1;
}

/*
 * Called from the general-protection fault handler to attempt to decode
 * and emulate an instruction that depends on 4GB segments.
 */
int gpf_emulate_4gb(struct cpu_user_regs *regs)
{
    struct vcpu *d = current;
    struct trap_info   *ti;
    struct trap_bounce *tb;
    u8            modrm, mod, reg, rm, decode;
    void         *memreg;
    unsigned long offset;
    u8            disp8;
    u32           disp32 = 0;
    u8            *eip;         /* ptr to instruction start */
    u8            *pb, b;       /* ptr into instr. / current instr. byte */
    int            gs_override = 0;
    int            twobyte = 0;

    /* WARNING: We only work for ring-3 segments. */
    if ( unlikely(vm86_mode(regs)) || unlikely(!ring_3(regs)) )


context:
space:
mode: