sys/arch/mips/cfe/cfe_api.c

   1 /* $NetBSD: cfe_api.c,v 1.3.2.3 2004/09/21 13:18:38 skrll Exp $ */
   2 /* from: SiByte Id: cfe_api.c,v 1.16 2002/07/09 23:29:11 cgd Exp $ */
   3
   4 /*
   5  * Copyright 2000, 2001, 2002
   6  * Broadcom Corporation. All rights reserved.
   7  *
   8  * This software is furnished under license and may be used and copied only
   9  * in accordance with the following terms and conditions.  Subject to these
  10  * conditions, you may download, copy, install, use, modify and distribute
  11  * modified or unmodified copies of this software in source and/or binary
  12  * form. No title or ownership is transferred hereby.
  13  *
  14  * 1) Any source code used, modified or distributed must reproduce and
  15  *    retain this copyright notice and list of conditions as they appear in
  16  *    the source file.
  17  *
  18  * 2) No right is granted to use any trade name, trademark, or logo of
  19  *    Broadcom Corporation.  The "Broadcom Corporation" name may not be
  20  *    used to endorse or promote products derived from this software
  21  *    without the prior written permission of Broadcom Corporation.
  22  *
  23  * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
  24  *    WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
  25  *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
  26  *    NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
  27  *    FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
  28  *    LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  *    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30  *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  31  *    BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  32  *    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  33  *    OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /*  *********************************************************************
  37     *
  38     *  Broadcom Common Firmware Environment (CFE)
  39     *
  40     *  Device Function stubs                    File: cfe_api.c
  41     *
  42     *  This module contains device function stubs (small routines to
  43     *  call the standard "iocb" interface entry point to CFE).
  44     *  There should be one routine here per iocb function call.
  45     *
  46     *  Authors:  Mitch Lichtenberg, Chris Demetriou
  47     *
  48     ********************************************************************* */
  49
  50 #include <sys/cdefs.h>
  51 __KERNEL_RCSID(0, "$NetBSD: cfe_api.c,v 1.3.2.3 2004/09/21 13:18:38 skrll Exp $");
  52
  53 #include "cfe_api.h"
  54 #include "cfe_api_int.h"
  55
  56 /* Cast from a native pointer to a cfe_xptr_t and back.  */
  57 #define XPTR_FROM_NATIVE(n)     ((cfe_xptr_t) (intptr_t) (n))
  58 #define NATIVE_FROM_XPTR(x)     ((void *) (intptr_t) (x))
  59
  60 #ifdef CFE_API_IMPL_NAMESPACE
  61 #define cfe_iocb_dispatch(a)            __cfe_iocb_dispatch(a)
  62 #endif
  63 int cfe_iocb_dispatch(cfe_xiocb_t *xiocb);
  64
  65 #if defined(CFE_API_common) || defined(CFE_API_ALL)
  66 /*
  67  * Declare the dispatch function with args of "intptr_t".
  68  * This makes sure whatever model we're compiling in
  69  * puts the pointers in a single register.  For example,
  70  * combining -mlong64 and -mips1 or -mips2 would lead to
  71  * trouble, since the handle and IOCB pointer will be
  72  * passed in two registers each, and CFE expects one.
  73  */
  74
  75 static int (*cfe_dispfunc)(intptr_t handle, intptr_t xiocb) = 0;
  76 static cfe_xuint_t cfe_handle = 0;
  77
  78 int
  79 cfe_init(cfe_xuint_t handle, cfe_xuint_t ept)
  80 {
  81     cfe_dispfunc = NATIVE_FROM_XPTR(ept);
  82     cfe_handle = handle;
  83     return 0;
  84 }
  85
  86 int
  87 cfe_iocb_dispatch(cfe_xiocb_t *xiocb)
  88 {
  89     if (!cfe_dispfunc) return -1;
  90     return (*cfe_dispfunc)((intptr_t)cfe_handle, (intptr_t)xiocb);
  91 }
  92 #endif /* CFE_API_common || CFE_API_ALL */
  93
  94 #if defined(CFE_API_close) || defined(CFE_API_ALL)
  95 int
  96 cfe_close(int handle)
  97 {
  98     cfe_xiocb_t xiocb;
  99
 100     xiocb.xiocb_fcode = CFE_CMD_DEV_CLOSE;
 101     xiocb.xiocb_status = 0;
 102     xiocb.xiocb_handle = handle;
 103     xiocb.xiocb_flags = 0;
 104     xiocb.xiocb_psize = 0;
 105
 106     cfe_iocb_dispatch(&xiocb);
 107
 108     return xiocb.xiocb_status;
 109
 110 }
 111 #endif /* CFE_API_close || CFE_API_ALL */
 112
 113 #if defined(CFE_API_cpu_start) || defined(CFE_API_ALL)
 114 int
 115 cfe_cpu_start(int cpu, void (*fn)(void), long sp, long gp, long a1)
 116 {
 117     cfe_xiocb_t xiocb;
 118
 119     xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
 120     xiocb.xiocb_status = 0;
 121     xiocb.xiocb_handle = 0;
 122     xiocb.xiocb_flags  = 0;
 123     xiocb.xiocb_psize = sizeof(xiocb_cpuctl_t);
 124     xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
 125     xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_START;
 126     xiocb.plist.xiocb_cpuctl.gp_val = gp;
 127     xiocb.plist.xiocb_cpuctl.sp_val = sp;
 128     xiocb.plist.xiocb_cpuctl.a1_val = a1;
 129     xiocb.plist.xiocb_cpuctl.start_addr = (long)fn;
 130
 131     cfe_iocb_dispatch(&xiocb);
 132
 133     return xiocb.xiocb_status;
 134 }
 135 #endif /* CFE_API_cpu_start || CFE_API_ALL */
 136
 137 #if defined(CFE_API_cpu_stop) || defined(CFE_API_ALL)
 138 int
 139 cfe_cpu_stop(int cpu)
 140 {
 141     cfe_xiocb_t xiocb;
 142
 143     xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
 144     xiocb.xiocb_status = 0;
 145     xiocb.xiocb_handle = 0;
 146     xiocb.xiocb_flags  = 0;
 147     xiocb.xiocb_psize = sizeof(xiocb_cpuctl_t);
 148     xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
 149     xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_STOP;
 150
 151     cfe_iocb_dispatch(&xiocb);
 152
 153     return xiocb.xiocb_status;
 154 }
 155 #endif /* CFE_API_cpu_stop || CFE_API_ALL */
 156
 157 #if defined(CFE_API_enumenv) || defined(CFE_API_ALL)
 158 int
 159 cfe_enumenv(int idx, char *name, int namelen, char *val, int vallen)
 160 {
 161     cfe_xiocb_t xiocb;
 162
 163     xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
 164     xiocb.xiocb_status = 0;
 165     xiocb.xiocb_handle = 0;
 166     xiocb.xiocb_flags = 0;
 167     xiocb.xiocb_psize = sizeof(xiocb_envbuf_t);
 168     xiocb.plist.xiocb_envbuf.enum_idx = idx;
 169     xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
 170     xiocb.plist.xiocb_envbuf.name_length = namelen;
 171     xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(val);
 172     xiocb.plist.xiocb_envbuf.val_length = vallen;
 173
 174     cfe_iocb_dispatch(&xiocb);
 175
 176     return xiocb.xiocb_status;
 177 }
 178 #endif /* CFE_API_enumenv || CFE_API_ALL */
 179
 180 #if defined(CFE_API_enummem) || defined(CFE_API_ALL)
 181 int
 182 cfe_enummem(int idx, int flags, cfe_xuint_t *start, cfe_xuint_t *length,
 183             cfe_xuint_t *type)
 184 {
 185     cfe_xiocb_t xiocb;
 186
 187     xiocb.xiocb_fcode = CFE_CMD_FW_MEMENUM;
 188     xiocb.xiocb_status = 0;
 189     xiocb.xiocb_handle = 0;
 190     xiocb.xiocb_flags = flags;
 191     xiocb.xiocb_psize = sizeof(xiocb_meminfo_t);
 192     xiocb.plist.xiocb_meminfo.mi_idx = idx;
 193
 194     cfe_iocb_dispatch(&xiocb);
 195
 196     if (xiocb.xiocb_status < 0)
 197         return xiocb.xiocb_status;
 198
 199     *start = xiocb.plist.xiocb_meminfo.mi_addr;
 200     *length = xiocb.plist.xiocb_meminfo.mi_size;
 201     *type = xiocb.plist.xiocb_meminfo.mi_type;
 202
 203     return 0;
 204 }
 205 #endif /* CFE_API_enummem || CFE_API_ALL */
 206
 207 #if defined(CFE_API_exit) || defined(CFE_API_ALL)
 208 int
 209 cfe_exit(int warm, int status)
 210 {
 211     cfe_xiocb_t xiocb;
 212
 213     xiocb.xiocb_fcode = CFE_CMD_FW_RESTART;
 214     xiocb.xiocb_status = 0;
 215     xiocb.xiocb_handle = 0;
 216     xiocb.xiocb_flags = warm ? CFE_FLG_WARMSTART : 0;
 217     xiocb.xiocb_psize = sizeof(xiocb_exitstat_t);
 218     xiocb.plist.xiocb_exitstat.status = status;
 219
 220     cfe_iocb_dispatch(&xiocb);
 221
 222     return xiocb.xiocb_status;
 223 }
 224 #endif /* CFE_API_exit || CFE_API_ALL */
 225
 226 #if defined(CFE_API_flushcache) || defined(CFE_API_ALL)
 227 int
 228 cfe_flushcache(int flg)
 229 {
 230     cfe_xiocb_t xiocb;
 231
 232     xiocb.xiocb_fcode = CFE_CMD_FW_FLUSHCACHE;
 233     xiocb.xiocb_status = 0;
 234     xiocb.xiocb_handle = 0;
 235     xiocb.xiocb_flags = flg;
 236     xiocb.xiocb_psize = 0;
 237
 238     cfe_iocb_dispatch(&xiocb);
 239
 240     return xiocb.xiocb_status;
 241 }
 242 #endif /* CFE_API_flushcache || CFE_API_ALL */
 243
 244 #if defined(CFE_API_getdevinfo) || defined(CFE_API_ALL)
 245 int
 246 cfe_getdevinfo(char *name)
 247 {
 248     cfe_xiocb_t xiocb;
 249
 250     xiocb.xiocb_fcode = CFE_CMD_DEV_GETINFO;
 251     xiocb.xiocb_status = 0;
 252     xiocb.xiocb_handle = 0;
 253     xiocb.xiocb_flags = 0;
 254     xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
 255     xiocb.plist.xiocb_buffer.buf_offset = 0;
 256     xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
 257     xiocb.plist.xiocb_buffer.buf_length = cfe_strlen(name);
 258
 259     cfe_iocb_dispatch(&xiocb);
 260
 261     if (xiocb.xiocb_status < 0)
 262         return xiocb.xiocb_status;
 263     return xiocb.plist.xiocb_buffer.buf_devflags;
 264 }
 265 #endif /* CFE_API_getdevinfo || CFE_API_ALL */
 266
 267 #if defined(CFE_API_getenv) || defined(CFE_API_ALL)
 268 int
 269 cfe_getenv(char *name, char *dest, int destlen)
 270 {
 271     cfe_xiocb_t xiocb;
 272
 273     *dest = 0;
 274
 275     xiocb.xiocb_fcode = CFE_CMD_ENV_GET;
 276     xiocb.xiocb_status = 0;
 277     xiocb.xiocb_handle = 0;
 278     xiocb.xiocb_flags = 0;
 279     xiocb.xiocb_psize = sizeof(xiocb_envbuf_t);
 280     xiocb.plist.xiocb_envbuf.enum_idx = 0;
 281     xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
 282     xiocb.plist.xiocb_envbuf.name_length = cfe_strlen(name);
 283     xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(dest);
 284     xiocb.plist.xiocb_envbuf.val_length = destlen;
 285
 286     cfe_iocb_dispatch(&xiocb);
 287
 288     return xiocb.xiocb_status;
 289 }
 290 #endif /* CFE_API_getenv || CFE_API_ALL */
 291
 292 #if defined(CFE_API_getfwinfo) || defined(CFE_API_ALL)
 293 int
 294 cfe_getfwinfo(cfe_fwinfo_t *info)
 295 {
 296     cfe_xiocb_t xiocb;
 297
 298     xiocb.xiocb_fcode = CFE_CMD_FW_GETINFO;
 299     xiocb.xiocb_status = 0;
 300     xiocb.xiocb_handle = 0;
 301     xiocb.xiocb_flags = 0;
 302     xiocb.xiocb_psize = sizeof(xiocb_fwinfo_t);
 303
 304     cfe_iocb_dispatch(&xiocb);
 305
 306     if (xiocb.xiocb_status < 0)
 307         return xiocb.xiocb_status;
 308
 309     info->fwi_version = xiocb.plist.xiocb_fwinfo.fwi_version;
 310     info->fwi_totalmem = xiocb.plist.xiocb_fwinfo.fwi_totalmem;
 311     info->fwi_flags = xiocb.plist.xiocb_fwinfo.fwi_flags;
 312     info->fwi_boardid = xiocb.plist.xiocb_fwinfo.fwi_boardid;
 313     info->fwi_bootarea_va = xiocb.plist.xiocb_fwinfo.fwi_bootarea_va;
 314     info->fwi_bootarea_pa = xiocb.plist.xiocb_fwinfo.fwi_bootarea_pa;
 315     info->fwi_bootarea_size = xiocb.plist.xiocb_fwinfo.fwi_bootarea_size;
 316 #if 0
 317     info->fwi_reserved1 = xiocb.plist.xiocb_fwinfo.fwi_reserved1;
 318     info->fwi_reserved2 = xiocb.plist.xiocb_fwinfo.fwi_reserved2;
 319     info->fwi_reserved3 = xiocb.plist.xiocb_fwinfo.fwi_reserved3;
 320 #endif
 321
 322     return 0;
 323 }
 324 #endif /* CFE_API_getfwinfo || CFE_API_ALL */
 325
 326 #if defined(CFE_API_getstdhandle) || defined(CFE_API_ALL)
 327 int
 328 cfe_getstdhandle(int flg)
 329 {
 330     cfe_xiocb_t xiocb;
 331
 332     xiocb.xiocb_fcode = CFE_CMD_DEV_GETHANDLE;
 333     xiocb.xiocb_status = 0;
 334     xiocb.xiocb_handle = 0;
 335     xiocb.xiocb_flags = flg;
 336     xiocb.xiocb_psize = 0;
 337
 338     cfe_iocb_dispatch(&xiocb);
 339
 340     if (xiocb.xiocb_status < 0)
 341         return xiocb.xiocb_status;
 342     return xiocb.xiocb_handle;
 343
 344 }
 345 #endif /* CFE_API_getstdhandle || CFE_API_ALL */
 346
 347 #if defined(CFE_API_getticks) || defined(CFE_API_ALL)
 348 int64_t
 349 #ifdef CFE_API_IMPL_NAMESPACE
 350 __cfe_getticks(void)
 351 #else
 352 cfe_getticks(void)
 353 #endif
 354 {
 355     cfe_xiocb_t xiocb;
 356
 357     xiocb.xiocb_fcode = CFE_CMD_FW_GETTIME;
 358     xiocb.xiocb_status = 0;
 359     xiocb.xiocb_handle = 0;
 360     xiocb.xiocb_flags = 0;
 361     xiocb.xiocb_psize = sizeof(xiocb_time_t);
 362     xiocb.plist.xiocb_time.ticks = 0;
 363
 364     cfe_iocb_dispatch(&xiocb);
 365
 366     return xiocb.plist.xiocb_time.ticks;
 367
 368 }
 369 #endif /* CFE_API_getticks || CFE_API_ALL */
 370
 371 #if defined(CFE_API_inpstat) || defined(CFE_API_ALL)
 372 int
 373 cfe_inpstat(int handle)
 374 {
 375     cfe_xiocb_t xiocb;
 376
 377     xiocb.xiocb_fcode = CFE_CMD_DEV_INPSTAT;
 378     xiocb.xiocb_status = 0;
 379     xiocb.xiocb_handle = handle;
 380     xiocb.xiocb_flags = 0;
 381     xiocb.xiocb_psize = sizeof(xiocb_inpstat_t);
 382     xiocb.plist.xiocb_inpstat.inp_status = 0;
 383
 384     cfe_iocb_dispatch(&xiocb);
 385
 386     if (xiocb.xiocb_status < 0)
 387         return xiocb.xiocb_status;
 388     return xiocb.plist.xiocb_inpstat.inp_status;
 389
 390 }
 391 #endif /* CFE_API_inpstat || CFE_API_ALL */
 392
 393 #if defined(CFE_API_ioctl) || defined(CFE_API_ALL)
 394 int
 395 cfe_ioctl(int handle, unsigned int ioctlnum, unsigned char *buffer, int length,
 396           int *retlen, cfe_xuint_t offset)
 397 {
 398     cfe_xiocb_t xiocb;
 399
 400     xiocb.xiocb_fcode = CFE_CMD_DEV_IOCTL;
 401     xiocb.xiocb_status = 0;
 402     xiocb.xiocb_handle = handle;
 403     xiocb.xiocb_flags = 0;
 404     xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
 405     xiocb.plist.xiocb_buffer.buf_offset = offset;
 406     xiocb.plist.xiocb_buffer.buf_ioctlcmd = ioctlnum;
 407     xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
 408     xiocb.plist.xiocb_buffer.buf_length = length;
 409
 410     cfe_iocb_dispatch(&xiocb);
 411
 412     if (retlen)
 413         *retlen = xiocb.plist.xiocb_buffer.buf_retlen;
 414     return xiocb.xiocb_status;
 415 }
 416 #endif /* CFE_API_ioctl || CFE_API_ALL */
 417
 418 #if defined(CFE_API_open) || defined(CFE_API_ALL)
 419 int
 420 cfe_open(char *name)
 421 {
 422     cfe_xiocb_t xiocb;
 423
 424     xiocb.xiocb_fcode = CFE_CMD_DEV_OPEN;
 425     xiocb.xiocb_status = 0;
 426     xiocb.xiocb_handle = 0;
 427     xiocb.xiocb_flags = 0;
 428     xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
 429     xiocb.plist.xiocb_buffer.buf_offset = 0;
 430     xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
 431     xiocb.plist.xiocb_buffer.buf_length = cfe_strlen(name);
 432
 433     cfe_iocb_dispatch(&xiocb);
 434
 435     if (xiocb.xiocb_status < 0)
 436         return xiocb.xiocb_status;
 437     return xiocb.xiocb_handle;
 438 }
 439 #endif /* CFE_API_open || CFE_API_ALL */
 440
 441 #if defined(CFE_API_read) || defined(CFE_API_ALL)
 442 int
 443 cfe_read(int handle, unsigned char *buffer, int length)
 444 {
 445     return cfe_readblk(handle, 0, buffer, length);
 446 }
 447 #endif /* CFE_API_read || CFE_API_ALL */
 448
 449 #if defined(CFE_API_readblk) || defined(CFE_API_ALL)
 450 int
 451 cfe_readblk(int handle, cfe_xint_t offset, unsigned char *buffer, int length)
 452 {
 453     cfe_xiocb_t xiocb;
 454
 455     xiocb.xiocb_fcode = CFE_CMD_DEV_READ;
 456     xiocb.xiocb_status = 0;
 457     xiocb.xiocb_handle = handle;
 458     xiocb.xiocb_flags = 0;
 459     xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
 460     xiocb.plist.xiocb_buffer.buf_offset = offset;
 461     xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
 462     xiocb.plist.xiocb_buffer.buf_length = length;
 463
 464     cfe_iocb_dispatch(&xiocb);
 465
 466     if (xiocb.xiocb_status < 0)
 467         return xiocb.xiocb_status;
 468     return xiocb.plist.xiocb_buffer.buf_retlen;
 469 }
 470 #endif /* CFE_API_readblk || CFE_API_ALL */
 471
 472 #if defined(CFE_API_setenv) || defined(CFE_API_ALL)
 473 int
 474 cfe_setenv(char *name, char *val)
 475 {
 476     cfe_xiocb_t xiocb;
 477
 478     xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
 479     xiocb.xiocb_status = 0;
 480     xiocb.xiocb_handle = 0;
 481     xiocb.xiocb_flags = 0;
 482     xiocb.xiocb_psize = sizeof(xiocb_envbuf_t);
 483     xiocb.plist.xiocb_envbuf.enum_idx = 0;
 484     xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
 485     xiocb.plist.xiocb_envbuf.name_length = cfe_strlen(name);
 486     xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(val);
 487     xiocb.plist.xiocb_envbuf.val_length = cfe_strlen(val);
 488
 489     cfe_iocb_dispatch(&xiocb);
 490
 491     return xiocb.xiocb_status;
 492 }
 493 #endif /* CFE_API_setenv || CFE_API_ALL */
 494
 495 #if (defined(CFE_API_strlen) || defined(CFE_API_ALL)) \
 496     && !defined(CFE_API_STRLEN_CUSTOM)
 497 int
 498 cfe_strlen(char *name)
 499 {
 500     int count = 0;
 501
 502     while (*name++)
 503         count++;
 504
 505     return count;
 506 }
 507 #endif /* CFE_API_strlen || CFE_API_ALL */
 508
 509 #if defined(CFE_API_write) || defined(CFE_API_ALL)
 510 int
 511 cfe_write(int handle, unsigned char *buffer, int length)
 512 {
 513     return cfe_writeblk(handle, 0, buffer, length);
 514 }
 515 #endif /* CFE_API_write || CFE_API_ALL */
 516
 517 #if defined(CFE_API_writeblk) || defined(CFE_API_ALL)
 518 int
 519 cfe_writeblk(int handle, cfe_xint_t offset, unsigned char *buffer, int length)
 520 {
 521     cfe_xiocb_t xiocb;
 522
 523     xiocb.xiocb_fcode = CFE_CMD_DEV_WRITE;
 524     xiocb.xiocb_status = 0;
 525     xiocb.xiocb_handle = handle;
 526     xiocb.xiocb_flags = 0;
 527     xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
 528     xiocb.plist.xiocb_buffer.buf_offset = offset;
 529     xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
 530     xiocb.plist.xiocb_buffer.buf_length = length;
 531
 532     cfe_iocb_dispatch(&xiocb);
 533
 534     if (xiocb.xiocb_status < 0)
 535         return xiocb.xiocb_status;
 536     return xiocb.plist.xiocb_buffer.buf_retlen;
 537 }
 538 #endif /* CFE_API_writeblk || CFE_API_ALL */