release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/fw/cfe/cfe_api.c

   1 /*
   2  * Copyright (C) 2000, 2001, 2002 Broadcom Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 /*
  20  *
  21  * Broadcom Common Firmware Environment (CFE)
  22  *
  23  * This module contains device function stubs (small routines to
  24  * call the standard "iocb" interface entry point to CFE).
  25  * There should be one routine here per iocb function call.
  26  *
  27  * Authors:  Mitch Lichtenberg, Chris Demetriou
  28  */
  29
  30 #include <asm/fw/cfe/cfe_api.h>
  31 #include "cfe_api_int.h"
  32
  33 /* Cast from a native pointer to a cfe_xptr_t and back.  */
  34 #define XPTR_FROM_NATIVE(n)     ((cfe_xptr_t) (intptr_t) (n))
  35 #define NATIVE_FROM_XPTR(x)     ((void *) (intptr_t) (x))
  36
  37 int cfe_iocb_dispatch(struct cfe_xiocb *xiocb);
  38
  39 /*
  40  * Declare the dispatch function with args of "intptr_t".
  41  * This makes sure whatever model we're compiling in
  42  * puts the pointers in a single register.  For example,
  43  * combining -mlong64 and -mips1 or -mips2 would lead to
  44  * trouble, since the handle and IOCB pointer will be
  45  * passed in two registers each, and CFE expects one.
  46  */
  47
  48 static int (*cfe_dispfunc) (intptr_t handle, intptr_t xiocb);
  49 static u64 cfe_handle;
  50
  51 int cfe_init(u64 handle, u64 ept)
  52 {
  53         cfe_dispfunc = NATIVE_FROM_XPTR(ept);
  54         cfe_handle = handle;
  55         return 0;
  56 }
  57
  58 int cfe_iocb_dispatch(struct cfe_xiocb * xiocb)
  59 {
  60         if (!cfe_dispfunc)
  61                 return -1;
  62         return (*cfe_dispfunc) ((intptr_t) cfe_handle, (intptr_t) xiocb);
  63 }
  64
  65 int cfe_close(int handle)
  66 {
  67         struct cfe_xiocb xiocb;
  68
  69         xiocb.xiocb_fcode = CFE_CMD_DEV_CLOSE;
  70         xiocb.xiocb_status = 0;
  71         xiocb.xiocb_handle = handle;
  72         xiocb.xiocb_flags = 0;
  73         xiocb.xiocb_psize = 0;
  74
  75         cfe_iocb_dispatch(&xiocb);
  76
  77         return xiocb.xiocb_status;
  78
  79 }
  80
  81 int cfe_cpu_start(int cpu, void (*fn) (void), long sp, long gp, long a1)
  82 {
  83         struct cfe_xiocb xiocb;
  84
  85         xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
  86         xiocb.xiocb_status = 0;
  87         xiocb.xiocb_handle = 0;
  88         xiocb.xiocb_flags = 0;
  89         xiocb.xiocb_psize = sizeof(struct xiocb_cpuctl);
  90         xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
  91         xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_START;
  92         xiocb.plist.xiocb_cpuctl.gp_val = gp;
  93         xiocb.plist.xiocb_cpuctl.sp_val = sp;
  94         xiocb.plist.xiocb_cpuctl.a1_val = a1;
  95         xiocb.plist.xiocb_cpuctl.start_addr = (long) fn;
  96
  97         cfe_iocb_dispatch(&xiocb);
  98
  99         return xiocb.xiocb_status;
 100 }
 101
 102 int cfe_cpu_stop(int cpu)
 103 {
 104         struct cfe_xiocb xiocb;
 105
 106         xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
 107         xiocb.xiocb_status = 0;
 108         xiocb.xiocb_handle = 0;
 109         xiocb.xiocb_flags = 0;
 110         xiocb.xiocb_psize = sizeof(struct xiocb_cpuctl);
 111         xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
 112         xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_STOP;
 113
 114         cfe_iocb_dispatch(&xiocb);
 115
 116         return xiocb.xiocb_status;
 117 }
 118
 119 int cfe_enumenv(int idx, char *name, int namelen, char *val, int vallen)
 120 {
 121         struct cfe_xiocb xiocb;
 122
 123         xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
 124         xiocb.xiocb_status = 0;
 125         xiocb.xiocb_handle = 0;
 126         xiocb.xiocb_flags = 0;
 127         xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
 128         xiocb.plist.xiocb_envbuf.enum_idx = idx;
 129         xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
 130         xiocb.plist.xiocb_envbuf.name_length = namelen;
 131         xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(val);
 132         xiocb.plist.xiocb_envbuf.val_length = vallen;
 133
 134         cfe_iocb_dispatch(&xiocb);
 135
 136         return xiocb.xiocb_status;
 137 }
 138
 139 int
 140 cfe_enummem(int idx, int flags, u64 *start, u64 *length, u64 *type)
 141 {
 142         struct cfe_xiocb xiocb;
 143
 144         xiocb.xiocb_fcode = CFE_CMD_FW_MEMENUM;
 145         xiocb.xiocb_status = 0;
 146         xiocb.xiocb_handle = 0;
 147         xiocb.xiocb_flags = flags;
 148         xiocb.xiocb_psize = sizeof(struct xiocb_meminfo);
 149         xiocb.plist.xiocb_meminfo.mi_idx = idx;
 150
 151         cfe_iocb_dispatch(&xiocb);
 152
 153         if (xiocb.xiocb_status < 0)
 154                 return xiocb.xiocb_status;
 155
 156         *start = xiocb.plist.xiocb_meminfo.mi_addr;
 157         *length = xiocb.plist.xiocb_meminfo.mi_size;
 158         *type = xiocb.plist.xiocb_meminfo.mi_type;
 159
 160         return 0;
 161 }
 162
 163 int cfe_exit(int warm, int status)
 164 {
 165         struct cfe_xiocb xiocb;
 166
 167         xiocb.xiocb_fcode = CFE_CMD_FW_RESTART;
 168         xiocb.xiocb_status = 0;
 169         xiocb.xiocb_handle = 0;
 170         xiocb.xiocb_flags = warm ? CFE_FLG_WARMSTART : 0;
 171         xiocb.xiocb_psize = sizeof(struct xiocb_exitstat);
 172         xiocb.plist.xiocb_exitstat.status = status;
 173
 174         cfe_iocb_dispatch(&xiocb);
 175
 176         return xiocb.xiocb_status;
 177 }
 178
 179 int cfe_flushcache(int flg)
 180 {
 181         struct cfe_xiocb xiocb;
 182
 183         xiocb.xiocb_fcode = CFE_CMD_FW_FLUSHCACHE;
 184         xiocb.xiocb_status = 0;
 185         xiocb.xiocb_handle = 0;
 186         xiocb.xiocb_flags = flg;
 187         xiocb.xiocb_psize = 0;
 188
 189         cfe_iocb_dispatch(&xiocb);
 190
 191         return xiocb.xiocb_status;
 192 }
 193
 194 int cfe_getdevinfo(char *name)
 195 {
 196         struct cfe_xiocb xiocb;
 197
 198         xiocb.xiocb_fcode = CFE_CMD_DEV_GETINFO;
 199         xiocb.xiocb_status = 0;
 200         xiocb.xiocb_handle = 0;
 201         xiocb.xiocb_flags = 0;
 202         xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
 203         xiocb.plist.xiocb_buffer.buf_offset = 0;
 204         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
 205         xiocb.plist.xiocb_buffer.buf_length = strlen(name);
 206
 207         cfe_iocb_dispatch(&xiocb);
 208
 209         if (xiocb.xiocb_status < 0)
 210                 return xiocb.xiocb_status;
 211         return xiocb.plist.xiocb_buffer.buf_ioctlcmd;
 212 }
 213
 214 int cfe_getenv(char *name, char *dest, int destlen)
 215 {
 216         struct cfe_xiocb xiocb;
 217
 218         *dest = 0;
 219
 220         xiocb.xiocb_fcode = CFE_CMD_ENV_GET;
 221         xiocb.xiocb_status = 0;
 222         xiocb.xiocb_handle = 0;
 223         xiocb.xiocb_flags = 0;
 224         xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
 225         xiocb.plist.xiocb_envbuf.enum_idx = 0;
 226         xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
 227         xiocb.plist.xiocb_envbuf.name_length = strlen(name);
 228         xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(dest);
 229         xiocb.plist.xiocb_envbuf.val_length = destlen;
 230
 231         cfe_iocb_dispatch(&xiocb);
 232
 233         return xiocb.xiocb_status;
 234 }
 235
 236 int cfe_getfwinfo(cfe_fwinfo_t * info)
 237 {
 238         struct cfe_xiocb xiocb;
 239
 240         xiocb.xiocb_fcode = CFE_CMD_FW_GETINFO;
 241         xiocb.xiocb_status = 0;
 242         xiocb.xiocb_handle = 0;
 243         xiocb.xiocb_flags = 0;
 244         xiocb.xiocb_psize = sizeof(struct xiocb_fwinfo);
 245
 246         cfe_iocb_dispatch(&xiocb);
 247
 248         if (xiocb.xiocb_status < 0)
 249                 return xiocb.xiocb_status;
 250
 251         info->fwi_version = xiocb.plist.xiocb_fwinfo.fwi_version;
 252         info->fwi_totalmem = xiocb.plist.xiocb_fwinfo.fwi_totalmem;
 253         info->fwi_flags = xiocb.plist.xiocb_fwinfo.fwi_flags;
 254         info->fwi_boardid = xiocb.plist.xiocb_fwinfo.fwi_boardid;
 255         info->fwi_bootarea_va = xiocb.plist.xiocb_fwinfo.fwi_bootarea_va;
 256         info->fwi_bootarea_pa = xiocb.plist.xiocb_fwinfo.fwi_bootarea_pa;
 257         info->fwi_bootarea_size =
 258             xiocb.plist.xiocb_fwinfo.fwi_bootarea_size;
 259
 260         return 0;
 261 }
 262
 263 int cfe_getstdhandle(int flg)
 264 {
 265         struct cfe_xiocb xiocb;
 266
 267         xiocb.xiocb_fcode = CFE_CMD_DEV_GETHANDLE;
 268         xiocb.xiocb_status = 0;
 269         xiocb.xiocb_handle = 0;
 270         xiocb.xiocb_flags = flg;
 271         xiocb.xiocb_psize = 0;
 272
 273         cfe_iocb_dispatch(&xiocb);
 274
 275         if (xiocb.xiocb_status < 0)
 276                 return xiocb.xiocb_status;
 277         return xiocb.xiocb_handle;
 278 }
 279
 280 int64_t
 281 cfe_getticks(void)
 282 {
 283         struct cfe_xiocb xiocb;
 284
 285         xiocb.xiocb_fcode = CFE_CMD_FW_GETTIME;
 286         xiocb.xiocb_status = 0;
 287         xiocb.xiocb_handle = 0;
 288         xiocb.xiocb_flags = 0;
 289         xiocb.xiocb_psize = sizeof(struct xiocb_time);
 290         xiocb.plist.xiocb_time.ticks = 0;
 291
 292         cfe_iocb_dispatch(&xiocb);
 293
 294         return xiocb.plist.xiocb_time.ticks;
 295
 296 }
 297
 298 int cfe_inpstat(int handle)
 299 {
 300         struct cfe_xiocb xiocb;
 301
 302         xiocb.xiocb_fcode = CFE_CMD_DEV_INPSTAT;
 303         xiocb.xiocb_status = 0;
 304         xiocb.xiocb_handle = handle;
 305         xiocb.xiocb_flags = 0;
 306         xiocb.xiocb_psize = sizeof(struct xiocb_inpstat);
 307         xiocb.plist.xiocb_inpstat.inp_status = 0;
 308
 309         cfe_iocb_dispatch(&xiocb);
 310
 311         if (xiocb.xiocb_status < 0)
 312                 return xiocb.xiocb_status;
 313         return xiocb.plist.xiocb_inpstat.inp_status;
 314 }
 315
 316 int
 317 cfe_ioctl(int handle, unsigned int ioctlnum, unsigned char *buffer,
 318           int length, int *retlen, u64 offset)
 319 {
 320         struct cfe_xiocb xiocb;
 321
 322         xiocb.xiocb_fcode = CFE_CMD_DEV_IOCTL;
 323         xiocb.xiocb_status = 0;
 324         xiocb.xiocb_handle = handle;
 325         xiocb.xiocb_flags = 0;
 326         xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
 327         xiocb.plist.xiocb_buffer.buf_offset = offset;
 328         xiocb.plist.xiocb_buffer.buf_ioctlcmd = ioctlnum;
 329         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
 330         xiocb.plist.xiocb_buffer.buf_length = length;
 331
 332         cfe_iocb_dispatch(&xiocb);
 333
 334         if (retlen)
 335                 *retlen = xiocb.plist.xiocb_buffer.buf_retlen;
 336         return xiocb.xiocb_status;
 337 }
 338
 339 int cfe_open(char *name)
 340 {
 341         struct cfe_xiocb xiocb;
 342
 343         xiocb.xiocb_fcode = CFE_CMD_DEV_OPEN;
 344         xiocb.xiocb_status = 0;
 345         xiocb.xiocb_handle = 0;
 346         xiocb.xiocb_flags = 0;
 347         xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
 348         xiocb.plist.xiocb_buffer.buf_offset = 0;
 349         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
 350         xiocb.plist.xiocb_buffer.buf_length = strlen(name);
 351
 352         cfe_iocb_dispatch(&xiocb);
 353
 354         if (xiocb.xiocb_status < 0)
 355                 return xiocb.xiocb_status;
 356         return xiocb.xiocb_handle;
 357 }
 358
 359 int cfe_read(int handle, unsigned char *buffer, int length)
 360 {
 361         return cfe_readblk(handle, 0, buffer, length);
 362 }
 363
 364 int cfe_readblk(int handle, s64 offset, unsigned char *buffer, int length)
 365 {
 366         struct cfe_xiocb xiocb;
 367
 368         xiocb.xiocb_fcode = CFE_CMD_DEV_READ;
 369         xiocb.xiocb_status = 0;
 370         xiocb.xiocb_handle = handle;
 371         xiocb.xiocb_flags = 0;
 372         xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
 373         xiocb.plist.xiocb_buffer.buf_offset = offset;
 374         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
 375         xiocb.plist.xiocb_buffer.buf_length = length;
 376
 377         cfe_iocb_dispatch(&xiocb);
 378
 379         if (xiocb.xiocb_status < 0)
 380                 return xiocb.xiocb_status;
 381         return xiocb.plist.xiocb_buffer.buf_retlen;
 382 }
 383
 384 int cfe_setenv(char *name, char *val)
 385 {
 386         struct cfe_xiocb xiocb;
 387
 388         xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
 389         xiocb.xiocb_status = 0;
 390         xiocb.xiocb_handle = 0;
 391         xiocb.xiocb_flags = 0;
 392         xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
 393         xiocb.plist.xiocb_envbuf.enum_idx = 0;
 394         xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
 395         xiocb.plist.xiocb_envbuf.name_length = strlen(name);
 396         xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(val);
 397         xiocb.plist.xiocb_envbuf.val_length = strlen(val);
 398
 399         cfe_iocb_dispatch(&xiocb);
 400
 401         return xiocb.xiocb_status;
 402 }
 403
 404 int cfe_write(int handle, unsigned char *buffer, int length)
 405 {
 406         return cfe_writeblk(handle, 0, buffer, length);
 407 }
 408
 409 int cfe_writeblk(int handle, s64 offset, unsigned char *buffer, int length)
 410 {
 411         struct cfe_xiocb xiocb;
 412
 413         xiocb.xiocb_fcode = CFE_CMD_DEV_WRITE;
 414         xiocb.xiocb_status = 0;
 415         xiocb.xiocb_handle = handle;
 416         xiocb.xiocb_flags = 0;
 417         xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
 418         xiocb.plist.xiocb_buffer.buf_offset = offset;
 419         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
 420         xiocb.plist.xiocb_buffer.buf_length = length;
 421
 422         cfe_iocb_dispatch(&xiocb);
 423
 424         if (xiocb.xiocb_status < 0)
 425                 return xiocb.xiocb_status;
 426         return xiocb.plist.xiocb_buffer.buf_retlen;
 427 }