The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/mips/rmi/bus_space_rmi.c

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    1 /*-
    2  * Copyright (c) 2009 RMI Corporation
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/10.1/sys/mips/rmi/bus_space_rmi.c 204131 2010-02-20 16:32:33Z rrs $
   27  */
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/10.1/sys/mips/rmi/bus_space_rmi.c 204131 2010-02-20 16:32:33Z rrs $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/bus.h>
   34 #include <sys/kernel.h>
   35 #include <sys/endian.h>
   36 #include <sys/malloc.h>
   37 #include <sys/ktr.h>
   38 
   39 #include <vm/vm.h>
   40 #include <vm/pmap.h>
   41 #include <vm/vm_kern.h>
   42 #include <vm/vm_extern.h>
   43 
   44 #include <machine/bus.h>
   45 #include <machine/cache.h>
   46 
   47 static int 
   48 rmi_bus_space_map(void *t, bus_addr_t addr,
   49     bus_size_t size, int flags,
   50     bus_space_handle_t * bshp);
   51 
   52 static void 
   53 rmi_bus_space_unmap(void *t, bus_space_handle_t bsh,
   54     bus_size_t size);
   55 
   56 static int 
   57 rmi_bus_space_subregion(void *t,
   58     bus_space_handle_t bsh,
   59     bus_size_t offset, bus_size_t size,
   60     bus_space_handle_t * nbshp);
   61 
   62 static u_int8_t 
   63 rmi_bus_space_read_1(void *t,
   64     bus_space_handle_t handle,
   65     bus_size_t offset);
   66 
   67 static u_int16_t 
   68 rmi_bus_space_read_2(void *t,
   69     bus_space_handle_t handle,
   70     bus_size_t offset);
   71 
   72 static u_int32_t 
   73 rmi_bus_space_read_4(void *t,
   74     bus_space_handle_t handle,
   75     bus_size_t offset);
   76 
   77 static void 
   78 rmi_bus_space_read_multi_1(void *t,
   79     bus_space_handle_t handle,
   80     bus_size_t offset, u_int8_t * addr,
   81     size_t count);
   82 
   83 static void 
   84 rmi_bus_space_read_multi_2(void *t,
   85     bus_space_handle_t handle,
   86     bus_size_t offset, u_int16_t * addr,
   87     size_t count);
   88 
   89 static void 
   90 rmi_bus_space_read_multi_4(void *t,
   91     bus_space_handle_t handle,
   92     bus_size_t offset, u_int32_t * addr,
   93     size_t count);
   94 
   95 static void 
   96 rmi_bus_space_read_region_1(void *t,
   97     bus_space_handle_t bsh,
   98     bus_size_t offset, u_int8_t * addr,
   99     size_t count);
  100 
  101 static void 
  102 rmi_bus_space_read_region_2(void *t,
  103     bus_space_handle_t bsh,
  104     bus_size_t offset, u_int16_t * addr,
  105     size_t count);
  106 
  107 static void 
  108 rmi_bus_space_read_region_4(void *t,
  109     bus_space_handle_t bsh,
  110     bus_size_t offset, u_int32_t * addr,
  111     size_t count);
  112 
  113 static void 
  114 rmi_bus_space_write_1(void *t,
  115     bus_space_handle_t handle,
  116     bus_size_t offset, u_int8_t value);
  117 
  118 static void 
  119 rmi_bus_space_write_2(void *t,
  120     bus_space_handle_t handle,
  121     bus_size_t offset, u_int16_t value);
  122 
  123 static void 
  124 rmi_bus_space_write_4(void *t,
  125     bus_space_handle_t handle,
  126     bus_size_t offset, u_int32_t value);
  127 
  128 static void 
  129 rmi_bus_space_write_multi_1(void *t,
  130     bus_space_handle_t handle,
  131     bus_size_t offset,
  132     const u_int8_t * addr,
  133     size_t count);
  134 
  135 static void 
  136 rmi_bus_space_write_multi_2(void *t,
  137     bus_space_handle_t handle,
  138     bus_size_t offset,
  139     const u_int16_t * addr,
  140     size_t count);
  141 
  142 static void 
  143 rmi_bus_space_write_multi_4(void *t,
  144     bus_space_handle_t handle,
  145     bus_size_t offset,
  146     const u_int32_t * addr,
  147     size_t count);
  148 
  149 static void 
  150 rmi_bus_space_write_region_2(void *t,
  151     bus_space_handle_t bsh,
  152     bus_size_t offset,
  153     const u_int16_t * addr,
  154     size_t count);
  155 
  156 static void 
  157 rmi_bus_space_write_region_4(void *t,
  158     bus_space_handle_t bsh,
  159     bus_size_t offset,
  160     const u_int32_t * addr,
  161     size_t count);
  162 
  163 
  164 static void 
  165 rmi_bus_space_set_region_2(void *t,
  166     bus_space_handle_t bsh,
  167     bus_size_t offset, u_int16_t value,
  168     size_t count);
  169 static void 
  170 rmi_bus_space_set_region_4(void *t,
  171     bus_space_handle_t bsh,
  172     bus_size_t offset, u_int32_t value,
  173     size_t count);
  174 
  175 static void 
  176 rmi_bus_space_barrier(void *tag __unused, bus_space_handle_t bsh __unused,
  177     bus_size_t offset __unused, bus_size_t len __unused, int flags);
  178 
  179 static void 
  180 rmi_bus_space_copy_region_2(void *t,
  181     bus_space_handle_t bsh1,
  182     bus_size_t off1,
  183     bus_space_handle_t bsh2,
  184     bus_size_t off2, size_t count);
  185 
  186 u_int8_t 
  187 rmi_bus_space_read_stream_1(void *t, bus_space_handle_t handle,
  188     bus_size_t offset);
  189 
  190 static u_int16_t 
  191 rmi_bus_space_read_stream_2(void *t, bus_space_handle_t handle,
  192     bus_size_t offset);
  193 
  194 static u_int32_t 
  195 rmi_bus_space_read_stream_4(void *t, bus_space_handle_t handle,
  196     bus_size_t offset);
  197 static void 
  198 rmi_bus_space_read_multi_stream_1(void *t,
  199     bus_space_handle_t handle,
  200     bus_size_t offset, u_int8_t * addr,
  201     size_t count);
  202 
  203 static void 
  204 rmi_bus_space_read_multi_stream_2(void *t,
  205     bus_space_handle_t handle,
  206     bus_size_t offset, u_int16_t * addr,
  207     size_t count);
  208 
  209 static void 
  210 rmi_bus_space_read_multi_stream_4(void *t,
  211     bus_space_handle_t handle,
  212     bus_size_t offset, u_int32_t * addr,
  213     size_t count);
  214 
  215 void 
  216 rmi_bus_space_write_stream_1(void *t, bus_space_handle_t bsh,
  217     bus_size_t offset, u_int8_t value);
  218 static void 
  219 rmi_bus_space_write_stream_2(void *t, bus_space_handle_t handle,
  220     bus_size_t offset, u_int16_t value);
  221 
  222 static void 
  223 rmi_bus_space_write_stream_4(void *t, bus_space_handle_t handle,
  224     bus_size_t offset, u_int32_t value);
  225 
  226 static void 
  227 rmi_bus_space_write_multi_stream_1(void *t,
  228     bus_space_handle_t handle,
  229     bus_size_t offset,
  230     const u_int8_t * addr,
  231     size_t count);
  232 static void 
  233 rmi_bus_space_write_multi_stream_2(void *t,
  234     bus_space_handle_t handle,
  235     bus_size_t offset,
  236     const u_int16_t * addr,
  237     size_t count);
  238 
  239 static void 
  240 rmi_bus_space_write_multi_stream_4(void *t,
  241     bus_space_handle_t handle,
  242     bus_size_t offset,
  243     const u_int32_t * addr,
  244     size_t count);
  245 
  246 #define TODO() printf("XLR memory bus space function '%s' unimplemented\n", __func__)
  247  
  248 static struct bus_space local_rmi_bus_space = {
  249         /* cookie */
  250         (void *)0,
  251 
  252         /* mapping/unmapping */
  253         rmi_bus_space_map,
  254         rmi_bus_space_unmap,
  255         rmi_bus_space_subregion,
  256 
  257         /* allocation/deallocation */
  258         NULL,
  259         NULL,
  260 
  261         /* barrier */
  262         rmi_bus_space_barrier,
  263 
  264         /* read (single) */
  265         rmi_bus_space_read_1,
  266         rmi_bus_space_read_2,
  267         rmi_bus_space_read_4,
  268         NULL,
  269 
  270         /* read multiple */
  271         rmi_bus_space_read_multi_1,
  272         rmi_bus_space_read_multi_2,
  273         rmi_bus_space_read_multi_4,
  274         NULL,
  275 
  276         /* read region */
  277         rmi_bus_space_read_region_1,
  278         rmi_bus_space_read_region_2,
  279         rmi_bus_space_read_region_4,
  280         NULL,
  281 
  282         /* write (single) */
  283         rmi_bus_space_write_1,
  284         rmi_bus_space_write_2,
  285         rmi_bus_space_write_4,
  286         NULL,
  287 
  288         /* write multiple */
  289         rmi_bus_space_write_multi_1,
  290         rmi_bus_space_write_multi_2,
  291         rmi_bus_space_write_multi_4,
  292         NULL,
  293 
  294         /* write region */
  295         NULL,
  296         rmi_bus_space_write_region_2,
  297         rmi_bus_space_write_region_4,
  298         NULL,
  299 
  300         /* set multiple */
  301         NULL,
  302         NULL,
  303         NULL,
  304         NULL,
  305 
  306         /* set region */
  307         NULL,
  308         rmi_bus_space_set_region_2,
  309         rmi_bus_space_set_region_4,
  310         NULL,
  311 
  312         /* copy */
  313         NULL,
  314         rmi_bus_space_copy_region_2,
  315         NULL,
  316         NULL,
  317 
  318         /* read (single) stream */
  319         rmi_bus_space_read_stream_1,
  320         rmi_bus_space_read_stream_2,
  321         rmi_bus_space_read_stream_4,
  322         NULL,
  323 
  324         /* read multiple stream */
  325         rmi_bus_space_read_multi_stream_1,
  326         rmi_bus_space_read_multi_stream_2,
  327         rmi_bus_space_read_multi_stream_4,
  328         NULL,
  329 
  330         /* read region stream */
  331         rmi_bus_space_read_region_1,
  332         rmi_bus_space_read_region_2,
  333         rmi_bus_space_read_region_4,
  334         NULL,
  335 
  336         /* write (single) stream */
  337         rmi_bus_space_write_stream_1,
  338         rmi_bus_space_write_stream_2,
  339         rmi_bus_space_write_stream_4,
  340         NULL,
  341 
  342         /* write multiple stream */
  343         rmi_bus_space_write_multi_stream_1,
  344         rmi_bus_space_write_multi_stream_2,
  345         rmi_bus_space_write_multi_stream_4,
  346         NULL,
  347 
  348         /* write region stream */
  349         NULL,
  350         rmi_bus_space_write_region_2,
  351         rmi_bus_space_write_region_4,
  352         NULL,
  353 };
  354 
  355 /* generic bus_space tag */
  356 bus_space_tag_t rmi_bus_space = &local_rmi_bus_space;
  357 
  358 /*
  359  * Map a region of device bus space into CPU virtual address space.
  360  */
  361 static int
  362 rmi_bus_space_map(void *t __unused, bus_addr_t addr,
  363     bus_size_t size __unused, int flags __unused,
  364     bus_space_handle_t * bshp)
  365 {
  366 
  367         *bshp = addr;
  368         return (0);
  369 }
  370 
  371 /*
  372  * Unmap a region of device bus space.
  373  */
  374 static void
  375 rmi_bus_space_unmap(void *t __unused, bus_space_handle_t bsh __unused,
  376     bus_size_t size __unused)
  377 {
  378 }
  379 
  380 /*
  381  * Get a new handle for a subregion of an already-mapped area of bus space.
  382  */
  383 
  384 static int
  385 rmi_bus_space_subregion(void *t __unused, bus_space_handle_t bsh,
  386     bus_size_t offset, bus_size_t size __unused,
  387     bus_space_handle_t * nbshp)
  388 {
  389         *nbshp = bsh + offset;
  390         return (0);
  391 }
  392 
  393 /*
  394  * Read a 1, 2, 4, or 8 byte quantity from bus space
  395  * described by tag/handle/offset.
  396  */
  397 
  398 static u_int8_t
  399 rmi_bus_space_read_1(void *tag, bus_space_handle_t handle,
  400     bus_size_t offset)
  401 {
  402         return (u_int8_t) (*(volatile u_int32_t *)(handle + offset));
  403 }
  404 
  405 static u_int16_t
  406 rmi_bus_space_read_2(void *tag, bus_space_handle_t handle,
  407     bus_size_t offset)
  408 {
  409         return (u_int16_t)(*(volatile u_int32_t *)(handle + offset));
  410 }
  411 
  412 static u_int32_t
  413 rmi_bus_space_read_4(void *tag, bus_space_handle_t handle,
  414     bus_size_t offset)
  415 {
  416         return (*(volatile u_int32_t *)(handle + offset));
  417 }
  418 
  419 
  420 /*
  421  * Read `count' 1, 2, 4, or 8 byte quantities from bus space
  422  * described by tag/handle/offset and copy into buffer provided.
  423  */
  424 static void
  425 rmi_bus_space_read_multi_1(void *tag, bus_space_handle_t handle,
  426     bus_size_t offset, u_int8_t * addr, size_t count)
  427 {
  428         TODO();
  429 }
  430 
  431 static void
  432 rmi_bus_space_read_multi_2(void *tag, bus_space_handle_t handle,
  433     bus_size_t offset, u_int16_t * addr, size_t count)
  434 {
  435         TODO();
  436 }
  437 
  438 static void
  439 rmi_bus_space_read_multi_4(void *tag, bus_space_handle_t handle,
  440     bus_size_t offset, u_int32_t * addr, size_t count)
  441 {
  442         TODO();
  443 }
  444 
  445 /*
  446  * Write the 1, 2, 4, or 8 byte value `value' to bus space
  447  * described by tag/handle/offset.
  448  */
  449 
  450 static void
  451 rmi_bus_space_write_1(void *tag, bus_space_handle_t handle,
  452     bus_size_t offset, u_int8_t value)
  453 {
  454         *(volatile u_int32_t *)(handle + offset) =  (u_int32_t)value;
  455 }
  456 
  457 static void
  458 rmi_bus_space_write_2(void *tag, bus_space_handle_t handle,
  459     bus_size_t offset, u_int16_t value)
  460 {
  461         *(volatile u_int32_t *)(handle + offset) = (u_int32_t)value;
  462 }
  463 
  464 static void
  465 rmi_bus_space_write_4(void *tag, bus_space_handle_t handle,
  466     bus_size_t offset, u_int32_t value)
  467 {
  468         *(volatile u_int32_t *)(handle + offset) = value;
  469 }
  470 
  471 
  472 /*
  473  * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
  474  * provided to bus space described by tag/handle/offset.
  475  */
  476 
  477 
  478 static void
  479 rmi_bus_space_write_multi_1(void *tag, bus_space_handle_t handle,
  480     bus_size_t offset, const u_int8_t * addr, size_t count)
  481 {
  482         TODO();
  483 }
  484 
  485 static void
  486 rmi_bus_space_write_multi_2(void *tag, bus_space_handle_t handle,
  487     bus_size_t offset, const u_int16_t * addr, size_t count)
  488 {
  489         TODO();
  490 }
  491 
  492 static void
  493 rmi_bus_space_write_multi_4(void *tag, bus_space_handle_t handle,
  494     bus_size_t offset, const u_int32_t * addr, size_t count)
  495 {
  496         TODO();
  497 }
  498 
  499 /*
  500  * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
  501  * by tag/handle starting at `offset'.
  502  */
  503 
  504 static void
  505 rmi_bus_space_set_region_2(void *t, bus_space_handle_t bsh,
  506     bus_size_t offset, u_int16_t value, size_t count)
  507 {
  508         bus_addr_t addr = bsh + offset;
  509 
  510         for (; count != 0; count--, addr += 2)
  511                 (*(volatile u_int32_t *)(addr)) = value;
  512 }
  513 
  514 static void
  515 rmi_bus_space_set_region_4(void *t, bus_space_handle_t bsh,
  516     bus_size_t offset, u_int32_t value, size_t count)
  517 {
  518         bus_addr_t addr = bsh + offset;
  519 
  520         for (; count != 0; count--, addr += 4)
  521                 (*(volatile u_int32_t *)(addr)) = value;
  522 }
  523 
  524 
  525 /*
  526  * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
  527  * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
  528  */
  529 static void
  530 rmi_bus_space_copy_region_2(void *t, bus_space_handle_t bsh1,
  531     bus_size_t off1, bus_space_handle_t bsh2,
  532     bus_size_t off2, size_t count)
  533 {
  534         printf("bus_space_copy_region_2 - unimplemented\n");
  535 }
  536 
  537 /*
  538  * Read `count' 1, 2, 4, or 8 byte quantities from bus space
  539  * described by tag/handle/offset and copy into buffer provided.
  540  */
  541 
  542 u_int8_t
  543 rmi_bus_space_read_stream_1(void *t, bus_space_handle_t handle,
  544     bus_size_t offset)
  545 {
  546 
  547         return *((volatile u_int8_t *)(handle + offset));
  548 }
  549 
  550 
  551 static u_int16_t
  552 rmi_bus_space_read_stream_2(void *t, bus_space_handle_t handle,
  553     bus_size_t offset)
  554 {
  555         return *(volatile u_int16_t *)(handle + offset);
  556 }
  557 
  558 
  559 static u_int32_t
  560 rmi_bus_space_read_stream_4(void *t, bus_space_handle_t handle,
  561     bus_size_t offset)
  562 {
  563         return (*(volatile u_int32_t *)(handle + offset));
  564 }
  565 
  566 
  567 static void
  568 rmi_bus_space_read_multi_stream_1(void *tag, bus_space_handle_t handle,
  569     bus_size_t offset, u_int8_t * addr, size_t count)
  570 {
  571         TODO();
  572 }
  573 
  574 static void
  575 rmi_bus_space_read_multi_stream_2(void *tag, bus_space_handle_t handle,
  576     bus_size_t offset, u_int16_t * addr, size_t count)
  577 {
  578         TODO();
  579 }
  580 
  581 static void
  582 rmi_bus_space_read_multi_stream_4(void *tag, bus_space_handle_t handle,
  583     bus_size_t offset, u_int32_t * addr, size_t count)
  584 {
  585         TODO();
  586 }
  587 
  588 
  589 /*
  590  * Read `count' 1, 2, 4, or 8 byte quantities from bus space
  591  * described by tag/handle and starting at `offset' and copy into
  592  * buffer provided.
  593  */
  594 void
  595 rmi_bus_space_read_region_1(void *t, bus_space_handle_t bsh,
  596     bus_size_t offset, u_int8_t * addr, size_t count)
  597 {
  598         TODO();
  599 }
  600 
  601 void
  602 rmi_bus_space_read_region_2(void *t, bus_space_handle_t bsh,
  603     bus_size_t offset, u_int16_t * addr, size_t count)
  604 {
  605         TODO();
  606 }
  607 
  608 void
  609 rmi_bus_space_read_region_4(void *t, bus_space_handle_t bsh,
  610     bus_size_t offset, u_int32_t * addr, size_t count)
  611 {
  612         bus_addr_t baddr = bsh + offset;
  613 
  614         while (count--) {
  615                 *addr++ = (*(volatile u_int32_t *)(baddr));
  616                 baddr += 4;
  617         }
  618 }
  619 
  620 void
  621 rmi_bus_space_write_stream_1(void *t, bus_space_handle_t handle,
  622     bus_size_t offset, u_int8_t value)
  623 {
  624         TODO();
  625 }
  626 
  627 
  628 static void
  629 rmi_bus_space_write_stream_2(void *t, bus_space_handle_t handle,
  630     bus_size_t offset, u_int16_t value)
  631 {
  632         TODO();
  633 }
  634 
  635 
  636 static void
  637 rmi_bus_space_write_stream_4(void *t, bus_space_handle_t handle,
  638     bus_size_t offset, u_int32_t value)
  639 {
  640         TODO();
  641 }
  642 
  643 
  644 static void
  645 rmi_bus_space_write_multi_stream_1(void *tag, bus_space_handle_t handle,
  646     bus_size_t offset, const u_int8_t * addr, size_t count)
  647 {
  648         TODO();
  649 }
  650 
  651 static void
  652 rmi_bus_space_write_multi_stream_2(void *tag, bus_space_handle_t handle,
  653     bus_size_t offset, const u_int16_t * addr, size_t count)
  654 {
  655         TODO();
  656 }
  657 
  658 static void
  659 rmi_bus_space_write_multi_stream_4(void *tag, bus_space_handle_t handle,
  660     bus_size_t offset, const u_int32_t * addr, size_t count)
  661 {
  662         TODO();
  663 }
  664 
  665 void
  666 rmi_bus_space_write_region_2(void *t,
  667     bus_space_handle_t bsh,
  668     bus_size_t offset,
  669     const u_int16_t * addr,
  670     size_t count)
  671 {
  672         TODO();
  673 }
  674 
  675 void
  676 rmi_bus_space_write_region_4(void *t, bus_space_handle_t bsh,
  677     bus_size_t offset, const u_int32_t * addr, size_t count)
  678 {
  679         TODO();
  680 }
  681 
  682 static void
  683 rmi_bus_space_barrier(void *tag __unused, bus_space_handle_t bsh __unused,
  684     bus_size_t offset __unused, bus_size_t len __unused, int flags)
  685 {
  686 }

Cache object: 29360f7524e5ff4d7b0af259e6e012c3


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