The Design and Implementation of the FreeBSD Operating System, Second Edition
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sys/mips/cavium/octopci_bus_space.c

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    1 /*      $NetBSD: bus.h,v 1.12 1997/10/01 08:25:15 fvdl Exp $    */
    2 /*-
    3  * $Id: bus.h,v 1.6 2007/08/09 11:23:32 katta Exp $
    4  *
    5  * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   10  * NASA Ames Research Center.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   31  * POSSIBILITY OF SUCH DAMAGE.
   32  */
   33 
   34 /*
   35  * Copyright (c) 1996 Charles M. Hannum.  All rights reserved.
   36  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions and the following disclaimer.
   43  * 2. Redistributions in binary form must reproduce the above copyright
   44  *    notice, this list of conditions and the following disclaimer in the
   45  *    documentation and/or other materials provided with the distribution.
   46  * 3. All advertising materials mentioning features or use of this software
   47  *    must display the following acknowledgement:
   48  *      This product includes software developed by Christopher G. Demetriou
   49  *      for the NetBSD Project.
   50  * 4. The name of the author may not be used to endorse or promote products
   51  *    derived from this software without specific prior written permission
   52  *
   53  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   54  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   55  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   56  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   57  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   58  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   62  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   63  *
   64  *      from: src/sys/alpha/include/bus.h,v 1.5 1999/08/28 00:38:40 peter
   65  * $FreeBSD: stable/9/sys/mips/cavium/octopci_bus_space.c 263688 2014-03-24 13:50:11Z emaste $
   66  */
   67 #include <sys/cdefs.h>
   68 __FBSDID("$FreeBSD: stable/9/sys/mips/cavium/octopci_bus_space.c 263688 2014-03-24 13:50:11Z emaste $");
   69 
   70 #include <sys/param.h>
   71 #include <sys/systm.h>
   72 #include <sys/bus.h>
   73 #include <sys/kernel.h>
   74 #include <sys/malloc.h>
   75 #include <sys/ktr.h>
   76 #include <sys/endian.h>
   77 
   78 #include <vm/vm.h>
   79 #include <vm/pmap.h>
   80 #include <vm/vm_kern.h>
   81 #include <vm/vm_extern.h>
   82 
   83 #include <machine/bus.h>
   84 #include <machine/cache.h>
   85 
   86 #include <mips/cavium/octopcivar.h>
   87 
   88 #include <contrib/octeon-sdk/cvmx.h>
   89 
   90 static struct bus_space octopci_space = {
   91         /* cookie */
   92         (void *) 0,
   93 
   94         /* mapping/unmapping */
   95         octopci_bs_map,
   96         octopci_bs_unmap,
   97         octopci_bs_subregion,
   98 
   99         /* allocation/deallocation */
  100         NULL,
  101         NULL,
  102 
  103         /* barrier */
  104         octopci_bs_barrier,
  105 
  106         /* read (single) */
  107         octopci_bs_r_1,
  108         octopci_bs_r_2,
  109         octopci_bs_r_4,
  110         NULL,
  111 
  112         /* read multiple */
  113         octopci_bs_rm_1,
  114         octopci_bs_rm_2,
  115         octopci_bs_rm_4,
  116         NULL,
  117 
  118         /* read region */
  119         octopci_bs_rr_1,
  120         octopci_bs_rr_2,
  121         octopci_bs_rr_4,
  122         NULL,
  123 
  124         /* write (single) */
  125         octopci_bs_w_1,
  126         octopci_bs_w_2,
  127         octopci_bs_w_4,
  128         NULL,
  129 
  130         /* write multiple */
  131         octopci_bs_wm_1,
  132         octopci_bs_wm_2,
  133         octopci_bs_wm_4,
  134         NULL,
  135 
  136         /* write region */
  137         NULL,
  138         octopci_bs_wr_2,
  139         octopci_bs_wr_4,
  140         NULL,
  141 
  142         /* set multiple */
  143         NULL,
  144         NULL,
  145         NULL,
  146         NULL,
  147 
  148         /* set region */
  149         NULL,
  150         octopci_bs_sr_2,
  151         octopci_bs_sr_4,
  152         NULL,
  153 
  154         /* copy */
  155         NULL,
  156         octopci_bs_c_2,
  157         NULL,
  158         NULL,
  159 
  160         /* read (single) stream */
  161         octopci_bs_r_1,
  162         octopci_bs_r_2,
  163         octopci_bs_r_4,
  164         NULL,
  165 
  166         /* read multiple stream */
  167         octopci_bs_rm_1,
  168         octopci_bs_rm_2,
  169         octopci_bs_rm_4,
  170         NULL,
  171 
  172         /* read region stream */
  173         octopci_bs_rr_1,
  174         octopci_bs_rr_2,
  175         octopci_bs_rr_4,
  176         NULL,
  177 
  178         /* write (single) stream */
  179         octopci_bs_w_1,
  180         octopci_bs_w_2,
  181         octopci_bs_w_4,
  182         NULL,
  183 
  184         /* write multiple stream */
  185         octopci_bs_wm_1,
  186         octopci_bs_wm_2,
  187         octopci_bs_wm_4,
  188         NULL,
  189 
  190         /* write region stream */
  191         NULL,
  192         octopci_bs_wr_2,
  193         octopci_bs_wr_4,
  194         NULL,
  195 };
  196 
  197 #define rd8(a)          cvmx_read64_uint8(a)
  198 #define rd16(a)         le16toh(cvmx_read64_uint16(a))
  199 #define rd32(a)         le32toh(cvmx_read64_uint32(a))
  200 #define wr8(a, v)       cvmx_write64_uint8(a, v)
  201 #define wr16(a, v)      cvmx_write64_uint16(a, htole16(v))
  202 #define wr32(a, v)      cvmx_write64_uint32(a, htole32(v))
  203 
  204 /* octopci bus_space tag */
  205 bus_space_tag_t octopci_bus_space = &octopci_space;
  206 
  207 int
  208 octopci_bs_map(void *t __unused, bus_addr_t addr,
  209               bus_size_t size __unused, int flags __unused,
  210               bus_space_handle_t *bshp)
  211 {
  212 
  213         *bshp = addr;
  214         return (0);
  215 }
  216 
  217 void
  218 octopci_bs_unmap(void *t __unused, bus_space_handle_t bh __unused,
  219               bus_size_t size __unused)
  220 {
  221 
  222         /* Do nothing */
  223 }
  224 
  225 int
  226 octopci_bs_subregion(void *t __unused, bus_space_handle_t handle __unused,
  227               bus_size_t offset __unused, bus_size_t size __unused,
  228               bus_space_handle_t *nhandle __unused)
  229 {
  230 
  231         printf("SUBREGION?!?!?!\n");
  232         /* Do nothing */
  233         return (0);
  234 }
  235 
  236 uint8_t
  237 octopci_bs_r_1(void *t, bus_space_handle_t handle,
  238     bus_size_t offset)
  239 {
  240 
  241         return (rd8(handle + offset));
  242 }
  243 
  244 uint16_t
  245 octopci_bs_r_2(void *t, bus_space_handle_t handle,
  246     bus_size_t offset)
  247 {
  248 
  249         return (rd16(handle + offset));
  250 }
  251 
  252 uint32_t
  253 octopci_bs_r_4(void *t, bus_space_handle_t handle,
  254     bus_size_t offset)
  255 {
  256 
  257         return (rd32(handle + offset));
  258 }
  259 
  260 
  261 void
  262 octopci_bs_rm_1(void *t, bus_space_handle_t bsh,
  263     bus_size_t offset, uint8_t *addr, size_t count)
  264 {
  265 
  266         while (count--)
  267                 *addr++ = rd8(bsh + offset);
  268 }
  269 
  270 void
  271 octopci_bs_rm_2(void *t, bus_space_handle_t bsh,
  272     bus_size_t offset, uint16_t *addr, size_t count)
  273 {
  274         bus_addr_t baddr = bsh + offset;
  275 
  276         while (count--)
  277                 *addr++ = rd16(baddr);
  278 }
  279 
  280 void
  281 octopci_bs_rm_4(void *t, bus_space_handle_t bsh,
  282     bus_size_t offset, uint32_t *addr, size_t count)
  283 {
  284         bus_addr_t baddr = bsh + offset;
  285 
  286         while (count--)
  287                 *addr++ = rd32(baddr);
  288 }
  289 
  290 
  291 /*
  292  * Read `count' 1, 2, 4, or 8 byte quantities from bus space
  293  * described by tag/handle and starting at `offset' and copy into
  294  * buffer provided.
  295  */
  296 void
  297 octopci_bs_rr_1(void *t, bus_space_handle_t bsh,
  298     bus_size_t offset, uint8_t *addr, size_t count)
  299 {
  300         bus_addr_t baddr = bsh + offset;
  301 
  302         while (count--) {
  303                 *addr++ = rd8(baddr);
  304                 baddr += 1;
  305         }
  306 }
  307 
  308 void
  309 octopci_bs_rr_2(void *t, bus_space_handle_t bsh,
  310     bus_size_t offset, uint16_t *addr, size_t count)
  311 {
  312         bus_addr_t baddr = bsh + offset;
  313 
  314         while (count--) {
  315                 *addr++ = rd16(baddr);
  316                 baddr += 2;
  317         }
  318 }
  319 
  320 void
  321 octopci_bs_rr_4(void *t, bus_space_handle_t bsh,
  322     bus_size_t offset, uint32_t *addr, size_t count)
  323 {
  324         bus_addr_t baddr = bsh + offset;
  325 
  326         while (count--) {
  327                 *addr++ = rd32(baddr);
  328                 baddr += 4;
  329         }
  330 }
  331 
  332 /*
  333  * Write the 1, 2, 4, or 8 byte value `value' to bus space
  334  * described by tag/handle/offset.
  335  */
  336 void
  337 octopci_bs_w_1(void *t, bus_space_handle_t bsh,
  338     bus_size_t offset, uint8_t value)
  339 {
  340 
  341         wr8(bsh + offset, value);
  342 }
  343 
  344 void
  345 octopci_bs_w_2(void *t, bus_space_handle_t bsh,
  346     bus_size_t offset, uint16_t value)
  347 {
  348 
  349         wr16(bsh + offset, value);
  350 }
  351 
  352 void
  353 octopci_bs_w_4(void *t, bus_space_handle_t bsh,
  354     bus_size_t offset, uint32_t value)
  355 {
  356 
  357         wr32(bsh + offset, value);
  358 }
  359 
  360 /*
  361  * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
  362  * provided to bus space described by tag/handle/offset.
  363  */
  364 void
  365 octopci_bs_wm_1(void *t, bus_space_handle_t bsh,
  366     bus_size_t offset, const uint8_t *addr, size_t count)
  367 {
  368         bus_addr_t baddr = bsh + offset;
  369 
  370         while (count--)
  371                 wr8(baddr, *addr++);
  372 }
  373 
  374 void
  375 octopci_bs_wm_2(void *t, bus_space_handle_t bsh,
  376     bus_size_t offset, const uint16_t *addr, size_t count)
  377 {
  378         bus_addr_t baddr = bsh + offset;
  379 
  380         while (count--)
  381                 wr16(baddr, *addr++);
  382 }
  383 
  384 void
  385 octopci_bs_wm_4(void *t, bus_space_handle_t bsh,
  386     bus_size_t offset, const uint32_t *addr, size_t count)
  387 {
  388         bus_addr_t baddr = bsh + offset;
  389 
  390         while (count--)
  391                 wr32(baddr, *addr++);
  392 }
  393 
  394 /*
  395  * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
  396  * to bus space described by tag/handle starting at `offset'.
  397  */
  398 void
  399 octopci_bs_wr_1(void *t, bus_space_handle_t bsh,
  400     bus_size_t offset, const uint8_t *addr, size_t count)
  401 {
  402         bus_addr_t baddr = bsh + offset;
  403 
  404         while (count--) {
  405                 wr8(baddr, *addr++);
  406                 baddr += 1;
  407         }
  408 }
  409 
  410 void
  411 octopci_bs_wr_2(void *t, bus_space_handle_t bsh,
  412     bus_size_t offset, const uint16_t *addr, size_t count)
  413 {
  414         bus_addr_t baddr = bsh + offset;
  415 
  416         while (count--) {
  417                 wr16(baddr, *addr++);
  418                 baddr += 2;
  419         }
  420 }
  421 
  422 void
  423 octopci_bs_wr_4(void *t, bus_space_handle_t bsh,
  424     bus_size_t offset, const uint32_t *addr, size_t count)
  425 {
  426         bus_addr_t baddr = bsh + offset;
  427 
  428         while (count--) {
  429                 wr32(baddr, *addr++);
  430                 baddr += 4;
  431         }
  432 }
  433 
  434 /*
  435  * Write the 1, 2, 4, or 8 byte value `val' to bus space described
  436  * by tag/handle/offset `count' times.
  437  */
  438 void
  439 octopci_bs_sm_1(void *t, bus_space_handle_t bsh,
  440     bus_size_t offset, uint8_t value, size_t count)
  441 {
  442         bus_addr_t addr = bsh + offset;
  443 
  444         while (count--)
  445                 wr8(addr, value);
  446 }
  447 
  448 void
  449 octopci_bs_sm_2(void *t, bus_space_handle_t bsh,
  450     bus_size_t offset, uint16_t value, size_t count)
  451 {
  452         bus_addr_t addr = bsh + offset;
  453 
  454         while (count--)
  455                 wr16(addr, value);
  456 }
  457 
  458 void
  459 octopci_bs_sm_4(void *t, bus_space_handle_t bsh,
  460     bus_size_t offset, uint32_t value, size_t count)
  461 {
  462         bus_addr_t addr = bsh + offset;
  463 
  464         while (count--)
  465                 wr32(addr, value);
  466 }
  467 
  468 /*
  469  * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
  470  * by tag/handle starting at `offset'.
  471  */
  472 void
  473 octopci_bs_sr_1(void *t, bus_space_handle_t bsh,
  474     bus_size_t offset, uint8_t value, size_t count)
  475 {
  476         bus_addr_t addr = bsh + offset;
  477 
  478         for (; count != 0; count--, addr++)
  479                 wr8(addr, value);
  480 }
  481 
  482 void
  483 octopci_bs_sr_2(void *t, bus_space_handle_t bsh,
  484                        bus_size_t offset, uint16_t value, size_t count)
  485 {
  486         bus_addr_t addr = bsh + offset;
  487 
  488         for (; count != 0; count--, addr += 2)
  489                 wr16(addr, value);
  490 }
  491 
  492 void
  493 octopci_bs_sr_4(void *t, bus_space_handle_t bsh,
  494     bus_size_t offset, uint32_t value, size_t count)
  495 {
  496         bus_addr_t addr = bsh + offset;
  497 
  498         for (; count != 0; count--, addr += 4)
  499                 wr32(addr, value);
  500 }
  501 
  502 /*
  503  * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
  504  * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
  505  */
  506 void
  507 octopci_bs_c_1(void *t, bus_space_handle_t bsh1,
  508     bus_size_t off1, bus_space_handle_t bsh2,
  509     bus_size_t off2, size_t count)
  510 {
  511         bus_addr_t addr1 = bsh1 + off1;
  512         bus_addr_t addr2 = bsh2 + off2;
  513 
  514         if (addr1 >= addr2) {
  515                 /* src after dest: copy forward */
  516                 for (; count != 0; count--, addr1++, addr2++)
  517                         wr8(addr2, rd8(addr1));
  518         } else {
  519                 /* dest after src: copy backwards */
  520                 for (addr1 += (count - 1), addr2 += (count - 1);
  521                     count != 0; count--, addr1--, addr2--)
  522                         wr8(addr2, rd8(addr1));
  523         }
  524 }
  525 
  526 void
  527 octopci_bs_c_2(void *t, bus_space_handle_t bsh1,
  528     bus_size_t off1, bus_space_handle_t bsh2,
  529     bus_size_t off2, size_t count)
  530 {
  531         bus_addr_t addr1 = bsh1 + off1;
  532         bus_addr_t addr2 = bsh2 + off2;
  533 
  534         if (addr1 >= addr2) {
  535                 /* src after dest: copy forward */
  536                 for (; count != 0; count--, addr1 += 2, addr2 += 2)
  537                         wr16(addr2, rd16(addr1));
  538         } else {
  539                 /* dest after src: copy backwards */
  540                 for (addr1 += 2 * (count - 1), addr2 += 2 * (count - 1);
  541                     count != 0; count--, addr1 -= 2, addr2 -= 2)
  542                         wr16(addr2, rd16(addr1));
  543         }
  544 }
  545 
  546 void
  547 octopci_bs_c_4(void *t, bus_space_handle_t bsh1,
  548     bus_size_t off1, bus_space_handle_t bsh2,
  549     bus_size_t off2, size_t count)
  550 {
  551         bus_addr_t addr1 = bsh1 + off1;
  552         bus_addr_t addr2 = bsh2 + off2;
  553 
  554         if (addr1 >= addr2) {
  555                 /* src after dest: copy forward */
  556                 for (; count != 0; count--, addr1 += 4, addr2 += 4)
  557                         wr32(addr2, rd32(addr1));
  558         } else {
  559                 /* dest after src: copy backwards */
  560                 for (addr1 += 4 * (count - 1), addr2 += 4 * (count - 1);
  561                     count != 0; count--, addr1 -= 4, addr2 -= 4)
  562                         wr32(addr2, rd32(addr1));
  563         }
  564 }
  565 
  566 void
  567 octopci_bs_barrier(void *t __unused, 
  568                 bus_space_handle_t bsh __unused,
  569                 bus_size_t offset __unused, bus_size_t len __unused, 
  570                 int flags)
  571 {
  572 #if 0
  573         if (flags & BUS_SPACE_BARRIER_WRITE)
  574                 mips_dcache_wbinv_all();
  575 #endif
  576 }

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