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  * SPDX-License-Identifier: BSD-2-Clause-NetBSD AND BSD-4-Clause
    6  *
    7  * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
    8  * All rights reserved.
    9  *
   10  * This code is derived from software contributed to The NetBSD Foundation
   11  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   12  * NASA Ames Research Center.
   13  *
   14  * Redistribution and use in source and binary forms, with or without
   15  * modification, are permitted provided that the following conditions
   16  * are met:
   17  * 1. Redistributions of source code must retain the above copyright
   18  *    notice, this list of conditions and the following disclaimer.
   19  * 2. Redistributions in binary form must reproduce the above copyright
   20  *    notice, this list of conditions and the following disclaimer in the
   21  *    documentation and/or other materials provided with the distribution.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   33  * POSSIBILITY OF SUCH DAMAGE.
   34  */
   35 
   36 /*
   37  * Copyright (c) 1996 Charles M. Hannum.  All rights reserved.
   38  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
   39  *
   40  * Redistribution and use in source and binary forms, with or without
   41  * modification, are permitted provided that the following conditions
   42  * are met:
   43  * 1. Redistributions of source code must retain the above copyright
   44  *    notice, this list of conditions and the following disclaimer.
   45  * 2. Redistributions in binary form must reproduce the above copyright
   46  *    notice, this list of conditions and the following disclaimer in the
   47  *    documentation and/or other materials provided with the distribution.
   48  * 3. All advertising materials mentioning features or use of this software
   49  *    must display the following acknowledgement:
   50  *      This product includes software developed by Christopher G. Demetriou
   51  *      for the NetBSD Project.
   52  * 4. The name of the author may not be used to endorse or promote products
   53  *    derived from this software without specific prior written permission
   54  *
   55  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   56  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   57  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   58  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   59  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   60  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   61  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   64  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   65  *
   66  *      from: src/sys/alpha/include/bus.h,v 1.5 1999/08/28 00:38:40 peter
   67  * $FreeBSD: stable/12/sys/mips/cavium/octopci_bus_space.c 326259 2017-11-27 15:07:26Z pfg $
   68  */
   69 #include <sys/cdefs.h>
   70 __FBSDID("$FreeBSD: stable/12/sys/mips/cavium/octopci_bus_space.c 326259 2017-11-27 15:07:26Z pfg $");
   71 
   72 #include <sys/param.h>
   73 #include <sys/systm.h>
   74 #include <sys/bus.h>
   75 #include <sys/kernel.h>
   76 #include <sys/malloc.h>
   77 #include <sys/ktr.h>
   78 #include <sys/endian.h>
   79 
   80 #include <vm/vm.h>
   81 #include <vm/pmap.h>
   82 #include <vm/vm_kern.h>
   83 #include <vm/vm_extern.h>
   84 
   85 #include <machine/bus.h>
   86 #include <machine/cache.h>
   87 
   88 #include <mips/cavium/octopcivar.h>
   89 
   90 #include <contrib/octeon-sdk/cvmx.h>
   91 
   92 static struct bus_space octopci_space = {
   93         /* cookie */
   94         (void *) 0,
   95 
   96         /* mapping/unmapping */
   97         octopci_bs_map,
   98         octopci_bs_unmap,
   99         octopci_bs_subregion,
  100 
  101         /* allocation/deallocation */
  102         NULL,
  103         NULL,
  104 
  105         /* barrier */
  106         octopci_bs_barrier,
  107 
  108         /* read (single) */
  109         octopci_bs_r_1,
  110         octopci_bs_r_2,
  111         octopci_bs_r_4,
  112         NULL,
  113 
  114         /* read multiple */
  115         octopci_bs_rm_1,
  116         octopci_bs_rm_2,
  117         octopci_bs_rm_4,
  118         NULL,
  119 
  120         /* read region */
  121         octopci_bs_rr_1,
  122         octopci_bs_rr_2,
  123         octopci_bs_rr_4,
  124         NULL,
  125 
  126         /* write (single) */
  127         octopci_bs_w_1,
  128         octopci_bs_w_2,
  129         octopci_bs_w_4,
  130         NULL,
  131 
  132         /* write multiple */
  133         octopci_bs_wm_1,
  134         octopci_bs_wm_2,
  135         octopci_bs_wm_4,
  136         NULL,
  137 
  138         /* write region */
  139         NULL,
  140         octopci_bs_wr_2,
  141         octopci_bs_wr_4,
  142         NULL,
  143 
  144         /* set multiple */
  145         NULL,
  146         NULL,
  147         NULL,
  148         NULL,
  149 
  150         /* set region */
  151         NULL,
  152         octopci_bs_sr_2,
  153         octopci_bs_sr_4,
  154         NULL,
  155 
  156         /* copy */
  157         NULL,
  158         octopci_bs_c_2,
  159         NULL,
  160         NULL,
  161 
  162         /* read (single) stream */
  163         octopci_bs_r_1,
  164         octopci_bs_r_2,
  165         octopci_bs_r_4,
  166         NULL,
  167 
  168         /* read multiple stream */
  169         octopci_bs_rm_1,
  170         octopci_bs_rm_2,
  171         octopci_bs_rm_4,
  172         NULL,
  173 
  174         /* read region stream */
  175         octopci_bs_rr_1,
  176         octopci_bs_rr_2,
  177         octopci_bs_rr_4,
  178         NULL,
  179 
  180         /* write (single) stream */
  181         octopci_bs_w_1,
  182         octopci_bs_w_2,
  183         octopci_bs_w_4,
  184         NULL,
  185 
  186         /* write multiple stream */
  187         octopci_bs_wm_1,
  188         octopci_bs_wm_2,
  189         octopci_bs_wm_4,
  190         NULL,
  191 
  192         /* write region stream */
  193         NULL,
  194         octopci_bs_wr_2,
  195         octopci_bs_wr_4,
  196         NULL,
  197 };
  198 
  199 #define rd8(a)          cvmx_read64_uint8(a)
  200 #define rd16(a)         le16toh(cvmx_read64_uint16(a))
  201 #define rd32(a)         le32toh(cvmx_read64_uint32(a))
  202 #define wr8(a, v)       cvmx_write64_uint8(a, v)
  203 #define wr16(a, v)      cvmx_write64_uint16(a, htole16(v))
  204 #define wr32(a, v)      cvmx_write64_uint32(a, htole32(v))
  205 
  206 /* octopci bus_space tag */
  207 bus_space_tag_t octopci_bus_space = &octopci_space;
  208 
  209 int
  210 octopci_bs_map(void *t __unused, bus_addr_t addr,
  211               bus_size_t size __unused, int flags __unused,
  212               bus_space_handle_t *bshp)
  213 {
  214 
  215         *bshp = addr;
  216         return (0);
  217 }
  218 
  219 void
  220 octopci_bs_unmap(void *t __unused, bus_space_handle_t bh __unused,
  221               bus_size_t size __unused)
  222 {
  223 
  224         /* Do nothing */
  225 }
  226 
  227 int
  228 octopci_bs_subregion(void *t __unused, bus_space_handle_t handle,
  229               bus_size_t offset, bus_size_t size __unused,
  230               bus_space_handle_t *bshp)
  231 {
  232 
  233         *bshp = handle + offset;
  234         return (0);
  235 }
  236 
  237 uint8_t
  238 octopci_bs_r_1(void *t, bus_space_handle_t handle,
  239     bus_size_t offset)
  240 {
  241 
  242         return (rd8(handle + offset));
  243 }
  244 
  245 uint16_t
  246 octopci_bs_r_2(void *t, bus_space_handle_t handle,
  247     bus_size_t offset)
  248 {
  249 
  250         return (rd16(handle + offset));
  251 }
  252 
  253 uint32_t
  254 octopci_bs_r_4(void *t, bus_space_handle_t handle,
  255     bus_size_t offset)
  256 {
  257 
  258         return (rd32(handle + offset));
  259 }
  260 
  261 
  262 void
  263 octopci_bs_rm_1(void *t, bus_space_handle_t bsh,
  264     bus_size_t offset, uint8_t *addr, size_t count)
  265 {
  266 
  267         while (count--)
  268                 *addr++ = rd8(bsh + offset);
  269 }
  270 
  271 void
  272 octopci_bs_rm_2(void *t, bus_space_handle_t bsh,
  273     bus_size_t offset, uint16_t *addr, size_t count)
  274 {
  275         bus_addr_t baddr = bsh + offset;
  276 
  277         while (count--)
  278                 *addr++ = rd16(baddr);
  279 }
  280 
  281 void
  282 octopci_bs_rm_4(void *t, bus_space_handle_t bsh,
  283     bus_size_t offset, uint32_t *addr, size_t count)
  284 {
  285         bus_addr_t baddr = bsh + offset;
  286 
  287         while (count--)
  288                 *addr++ = rd32(baddr);
  289 }
  290 
  291 
  292 /*
  293  * Read `count' 1, 2, 4, or 8 byte quantities from bus space
  294  * described by tag/handle and starting at `offset' and copy into
  295  * buffer provided.
  296  */
  297 void
  298 octopci_bs_rr_1(void *t, bus_space_handle_t bsh,
  299     bus_size_t offset, uint8_t *addr, size_t count)
  300 {
  301         bus_addr_t baddr = bsh + offset;
  302 
  303         while (count--) {
  304                 *addr++ = rd8(baddr);
  305                 baddr += 1;
  306         }
  307 }
  308 
  309 void
  310 octopci_bs_rr_2(void *t, bus_space_handle_t bsh,
  311     bus_size_t offset, uint16_t *addr, size_t count)
  312 {
  313         bus_addr_t baddr = bsh + offset;
  314 
  315         while (count--) {
  316                 *addr++ = rd16(baddr);
  317                 baddr += 2;
  318         }
  319 }
  320 
  321 void
  322 octopci_bs_rr_4(void *t, bus_space_handle_t bsh,
  323     bus_size_t offset, uint32_t *addr, size_t count)
  324 {
  325         bus_addr_t baddr = bsh + offset;
  326 
  327         while (count--) {
  328                 *addr++ = rd32(baddr);
  329                 baddr += 4;
  330         }
  331 }
  332 
  333 /*
  334  * Write the 1, 2, 4, or 8 byte value `value' to bus space
  335  * described by tag/handle/offset.
  336  */
  337 void
  338 octopci_bs_w_1(void *t, bus_space_handle_t bsh,
  339     bus_size_t offset, uint8_t value)
  340 {
  341 
  342         wr8(bsh + offset, value);
  343 }
  344 
  345 void
  346 octopci_bs_w_2(void *t, bus_space_handle_t bsh,
  347     bus_size_t offset, uint16_t value)
  348 {
  349 
  350         wr16(bsh + offset, value);
  351 }
  352 
  353 void
  354 octopci_bs_w_4(void *t, bus_space_handle_t bsh,
  355     bus_size_t offset, uint32_t value)
  356 {
  357 
  358         wr32(bsh + offset, value);
  359 }
  360 
  361 /*
  362  * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
  363  * provided to bus space described by tag/handle/offset.
  364  */
  365 void
  366 octopci_bs_wm_1(void *t, bus_space_handle_t bsh,
  367     bus_size_t offset, const uint8_t *addr, size_t count)
  368 {
  369         bus_addr_t baddr = bsh + offset;
  370 
  371         while (count--)
  372                 wr8(baddr, *addr++);
  373 }
  374 
  375 void
  376 octopci_bs_wm_2(void *t, bus_space_handle_t bsh,
  377     bus_size_t offset, const uint16_t *addr, size_t count)
  378 {
  379         bus_addr_t baddr = bsh + offset;
  380 
  381         while (count--)
  382                 wr16(baddr, *addr++);
  383 }
  384 
  385 void
  386 octopci_bs_wm_4(void *t, bus_space_handle_t bsh,
  387     bus_size_t offset, const uint32_t *addr, size_t count)
  388 {
  389         bus_addr_t baddr = bsh + offset;
  390 
  391         while (count--)
  392                 wr32(baddr, *addr++);
  393 }
  394 
  395 /*
  396  * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
  397  * to bus space described by tag/handle starting at `offset'.
  398  */
  399 void
  400 octopci_bs_wr_1(void *t, bus_space_handle_t bsh,
  401     bus_size_t offset, const uint8_t *addr, size_t count)
  402 {
  403         bus_addr_t baddr = bsh + offset;
  404 
  405         while (count--) {
  406                 wr8(baddr, *addr++);
  407                 baddr += 1;
  408         }
  409 }
  410 
  411 void
  412 octopci_bs_wr_2(void *t, bus_space_handle_t bsh,
  413     bus_size_t offset, const uint16_t *addr, size_t count)
  414 {
  415         bus_addr_t baddr = bsh + offset;
  416 
  417         while (count--) {
  418                 wr16(baddr, *addr++);
  419                 baddr += 2;
  420         }
  421 }
  422 
  423 void
  424 octopci_bs_wr_4(void *t, bus_space_handle_t bsh,
  425     bus_size_t offset, const uint32_t *addr, size_t count)
  426 {
  427         bus_addr_t baddr = bsh + offset;
  428 
  429         while (count--) {
  430                 wr32(baddr, *addr++);
  431                 baddr += 4;
  432         }
  433 }
  434 
  435 /*
  436  * Write the 1, 2, 4, or 8 byte value `val' to bus space described
  437  * by tag/handle/offset `count' times.
  438  */
  439 void
  440 octopci_bs_sm_1(void *t, bus_space_handle_t bsh,
  441     bus_size_t offset, uint8_t value, size_t count)
  442 {
  443         bus_addr_t addr = bsh + offset;
  444 
  445         while (count--)
  446                 wr8(addr, value);
  447 }
  448 
  449 void
  450 octopci_bs_sm_2(void *t, bus_space_handle_t bsh,
  451     bus_size_t offset, uint16_t value, size_t count)
  452 {
  453         bus_addr_t addr = bsh + offset;
  454 
  455         while (count--)
  456                 wr16(addr, value);
  457 }
  458 
  459 void
  460 octopci_bs_sm_4(void *t, bus_space_handle_t bsh,
  461     bus_size_t offset, uint32_t value, size_t count)
  462 {
  463         bus_addr_t addr = bsh + offset;
  464 
  465         while (count--)
  466                 wr32(addr, value);
  467 }
  468 
  469 /*
  470  * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
  471  * by tag/handle starting at `offset'.
  472  */
  473 void
  474 octopci_bs_sr_1(void *t, bus_space_handle_t bsh,
  475     bus_size_t offset, uint8_t value, size_t count)
  476 {
  477         bus_addr_t addr = bsh + offset;
  478 
  479         for (; count != 0; count--, addr++)
  480                 wr8(addr, value);
  481 }
  482 
  483 void
  484 octopci_bs_sr_2(void *t, bus_space_handle_t bsh,
  485                        bus_size_t offset, uint16_t value, size_t count)
  486 {
  487         bus_addr_t addr = bsh + offset;
  488 
  489         for (; count != 0; count--, addr += 2)
  490                 wr16(addr, value);
  491 }
  492 
  493 void
  494 octopci_bs_sr_4(void *t, bus_space_handle_t bsh,
  495     bus_size_t offset, uint32_t value, size_t count)
  496 {
  497         bus_addr_t addr = bsh + offset;
  498 
  499         for (; count != 0; count--, addr += 4)
  500                 wr32(addr, value);
  501 }
  502 
  503 /*
  504  * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
  505  * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
  506  */
  507 void
  508 octopci_bs_c_1(void *t, bus_space_handle_t bsh1,
  509     bus_size_t off1, bus_space_handle_t bsh2,
  510     bus_size_t off2, size_t count)
  511 {
  512         bus_addr_t addr1 = bsh1 + off1;
  513         bus_addr_t addr2 = bsh2 + off2;
  514 
  515         if (addr1 >= addr2) {
  516                 /* src after dest: copy forward */
  517                 for (; count != 0; count--, addr1++, addr2++)
  518                         wr8(addr2, rd8(addr1));
  519         } else {
  520                 /* dest after src: copy backwards */
  521                 for (addr1 += (count - 1), addr2 += (count - 1);
  522                     count != 0; count--, addr1--, addr2--)
  523                         wr8(addr2, rd8(addr1));
  524         }
  525 }
  526 
  527 void
  528 octopci_bs_c_2(void *t, bus_space_handle_t bsh1,
  529     bus_size_t off1, bus_space_handle_t bsh2,
  530     bus_size_t off2, size_t count)
  531 {
  532         bus_addr_t addr1 = bsh1 + off1;
  533         bus_addr_t addr2 = bsh2 + off2;
  534 
  535         if (addr1 >= addr2) {
  536                 /* src after dest: copy forward */
  537                 for (; count != 0; count--, addr1 += 2, addr2 += 2)
  538                         wr16(addr2, rd16(addr1));
  539         } else {
  540                 /* dest after src: copy backwards */
  541                 for (addr1 += 2 * (count - 1), addr2 += 2 * (count - 1);
  542                     count != 0; count--, addr1 -= 2, addr2 -= 2)
  543                         wr16(addr2, rd16(addr1));
  544         }
  545 }
  546 
  547 void
  548 octopci_bs_c_4(void *t, bus_space_handle_t bsh1,
  549     bus_size_t off1, bus_space_handle_t bsh2,
  550     bus_size_t off2, size_t count)
  551 {
  552         bus_addr_t addr1 = bsh1 + off1;
  553         bus_addr_t addr2 = bsh2 + off2;
  554 
  555         if (addr1 >= addr2) {
  556                 /* src after dest: copy forward */
  557                 for (; count != 0; count--, addr1 += 4, addr2 += 4)
  558                         wr32(addr2, rd32(addr1));
  559         } else {
  560                 /* dest after src: copy backwards */
  561                 for (addr1 += 4 * (count - 1), addr2 += 4 * (count - 1);
  562                     count != 0; count--, addr1 -= 4, addr2 -= 4)
  563                         wr32(addr2, rd32(addr1));
  564         }
  565 }
  566 
  567 void
  568 octopci_bs_barrier(void *t __unused, 
  569                 bus_space_handle_t bsh __unused,
  570                 bus_size_t offset __unused, bus_size_t len __unused, 
  571                 int flags)
  572 {
  573 #if 0
  574         if (flags & BUS_SPACE_BARRIER_WRITE)
  575                 mips_dcache_wbinv_all();
  576 #endif
  577 }

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