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  * $FreeBSD$
   68  */
   69 #include <sys/cdefs.h>
   70 __FBSDID("$FreeBSD$");
   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 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  * Read `count' 1, 2, 4, or 8 byte quantities from bus space
  292  * described by tag/handle and starting at `offset' and copy into
  293  * buffer provided.
  294  */
  295 void
  296 octopci_bs_rr_1(void *t, bus_space_handle_t bsh,
  297     bus_size_t offset, uint8_t *addr, size_t count)
  298 {
  299         bus_addr_t baddr = bsh + offset;
  300 
  301         while (count--) {
  302                 *addr++ = rd8(baddr);
  303                 baddr += 1;
  304         }
  305 }
  306 
  307 void
  308 octopci_bs_rr_2(void *t, bus_space_handle_t bsh,
  309     bus_size_t offset, uint16_t *addr, size_t count)
  310 {
  311         bus_addr_t baddr = bsh + offset;
  312 
  313         while (count--) {
  314                 *addr++ = rd16(baddr);
  315                 baddr += 2;
  316         }
  317 }
  318 
  319 void
  320 octopci_bs_rr_4(void *t, bus_space_handle_t bsh,
  321     bus_size_t offset, uint32_t *addr, size_t count)
  322 {
  323         bus_addr_t baddr = bsh + offset;
  324 
  325         while (count--) {
  326                 *addr++ = rd32(baddr);
  327                 baddr += 4;
  328         }
  329 }
  330 
  331 /*
  332  * Write the 1, 2, 4, or 8 byte value `value' to bus space
  333  * described by tag/handle/offset.
  334  */
  335 void
  336 octopci_bs_w_1(void *t, bus_space_handle_t bsh,
  337     bus_size_t offset, uint8_t value)
  338 {
  339 
  340         wr8(bsh + offset, value);
  341 }
  342 
  343 void
  344 octopci_bs_w_2(void *t, bus_space_handle_t bsh,
  345     bus_size_t offset, uint16_t value)
  346 {
  347 
  348         wr16(bsh + offset, value);
  349 }
  350 
  351 void
  352 octopci_bs_w_4(void *t, bus_space_handle_t bsh,
  353     bus_size_t offset, uint32_t value)
  354 {
  355 
  356         wr32(bsh + offset, value);
  357 }
  358 
  359 /*
  360  * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
  361  * provided to bus space described by tag/handle/offset.
  362  */
  363 void
  364 octopci_bs_wm_1(void *t, bus_space_handle_t bsh,
  365     bus_size_t offset, const uint8_t *addr, size_t count)
  366 {
  367         bus_addr_t baddr = bsh + offset;
  368 
  369         while (count--)
  370                 wr8(baddr, *addr++);
  371 }
  372 
  373 void
  374 octopci_bs_wm_2(void *t, bus_space_handle_t bsh,
  375     bus_size_t offset, const uint16_t *addr, size_t count)
  376 {
  377         bus_addr_t baddr = bsh + offset;
  378 
  379         while (count--)
  380                 wr16(baddr, *addr++);
  381 }
  382 
  383 void
  384 octopci_bs_wm_4(void *t, bus_space_handle_t bsh,
  385     bus_size_t offset, const uint32_t *addr, size_t count)
  386 {
  387         bus_addr_t baddr = bsh + offset;
  388 
  389         while (count--)
  390                 wr32(baddr, *addr++);
  391 }
  392 
  393 /*
  394  * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
  395  * to bus space described by tag/handle starting at `offset'.
  396  */
  397 void
  398 octopci_bs_wr_1(void *t, bus_space_handle_t bsh,
  399     bus_size_t offset, const uint8_t *addr, size_t count)
  400 {
  401         bus_addr_t baddr = bsh + offset;
  402 
  403         while (count--) {
  404                 wr8(baddr, *addr++);
  405                 baddr += 1;
  406         }
  407 }
  408 
  409 void
  410 octopci_bs_wr_2(void *t, bus_space_handle_t bsh,
  411     bus_size_t offset, const uint16_t *addr, size_t count)
  412 {
  413         bus_addr_t baddr = bsh + offset;
  414 
  415         while (count--) {
  416                 wr16(baddr, *addr++);
  417                 baddr += 2;
  418         }
  419 }
  420 
  421 void
  422 octopci_bs_wr_4(void *t, bus_space_handle_t bsh,
  423     bus_size_t offset, const uint32_t *addr, size_t count)
  424 {
  425         bus_addr_t baddr = bsh + offset;
  426 
  427         while (count--) {
  428                 wr32(baddr, *addr++);
  429                 baddr += 4;
  430         }
  431 }
  432 
  433 /*
  434  * Write the 1, 2, 4, or 8 byte value `val' to bus space described
  435  * by tag/handle/offset `count' times.
  436  */
  437 void
  438 octopci_bs_sm_1(void *t, bus_space_handle_t bsh,
  439     bus_size_t offset, uint8_t value, size_t count)
  440 {
  441         bus_addr_t addr = bsh + offset;
  442 
  443         while (count--)
  444                 wr8(addr, value);
  445 }
  446 
  447 void
  448 octopci_bs_sm_2(void *t, bus_space_handle_t bsh,
  449     bus_size_t offset, uint16_t value, size_t count)
  450 {
  451         bus_addr_t addr = bsh + offset;
  452 
  453         while (count--)
  454                 wr16(addr, value);
  455 }
  456 
  457 void
  458 octopci_bs_sm_4(void *t, bus_space_handle_t bsh,
  459     bus_size_t offset, uint32_t value, size_t count)
  460 {
  461         bus_addr_t addr = bsh + offset;
  462 
  463         while (count--)
  464                 wr32(addr, value);
  465 }
  466 
  467 /*
  468  * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
  469  * by tag/handle starting at `offset'.
  470  */
  471 void
  472 octopci_bs_sr_1(void *t, bus_space_handle_t bsh,
  473     bus_size_t offset, uint8_t value, size_t count)
  474 {
  475         bus_addr_t addr = bsh + offset;
  476 
  477         for (; count != 0; count--, addr++)
  478                 wr8(addr, value);
  479 }
  480 
  481 void
  482 octopci_bs_sr_2(void *t, bus_space_handle_t bsh,
  483                        bus_size_t offset, uint16_t value, size_t count)
  484 {
  485         bus_addr_t addr = bsh + offset;
  486 
  487         for (; count != 0; count--, addr += 2)
  488                 wr16(addr, value);
  489 }
  490 
  491 void
  492 octopci_bs_sr_4(void *t, bus_space_handle_t bsh,
  493     bus_size_t offset, uint32_t value, size_t count)
  494 {
  495         bus_addr_t addr = bsh + offset;
  496 
  497         for (; count != 0; count--, addr += 4)
  498                 wr32(addr, value);
  499 }
  500 
  501 /*
  502  * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
  503  * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
  504  */
  505 void
  506 octopci_bs_c_1(void *t, bus_space_handle_t bsh1,
  507     bus_size_t off1, bus_space_handle_t bsh2,
  508     bus_size_t off2, size_t count)
  509 {
  510         bus_addr_t addr1 = bsh1 + off1;
  511         bus_addr_t addr2 = bsh2 + off2;
  512 
  513         if (addr1 >= addr2) {
  514                 /* src after dest: copy forward */
  515                 for (; count != 0; count--, addr1++, addr2++)
  516                         wr8(addr2, rd8(addr1));
  517         } else {
  518                 /* dest after src: copy backwards */
  519                 for (addr1 += (count - 1), addr2 += (count - 1);
  520                     count != 0; count--, addr1--, addr2--)
  521                         wr8(addr2, rd8(addr1));
  522         }
  523 }
  524 
  525 void
  526 octopci_bs_c_2(void *t, bus_space_handle_t bsh1,
  527     bus_size_t off1, bus_space_handle_t bsh2,
  528     bus_size_t off2, size_t count)
  529 {
  530         bus_addr_t addr1 = bsh1 + off1;
  531         bus_addr_t addr2 = bsh2 + off2;
  532 
  533         if (addr1 >= addr2) {
  534                 /* src after dest: copy forward */
  535                 for (; count != 0; count--, addr1 += 2, addr2 += 2)
  536                         wr16(addr2, rd16(addr1));
  537         } else {
  538                 /* dest after src: copy backwards */
  539                 for (addr1 += 2 * (count - 1), addr2 += 2 * (count - 1);
  540                     count != 0; count--, addr1 -= 2, addr2 -= 2)
  541                         wr16(addr2, rd16(addr1));
  542         }
  543 }
  544 
  545 void
  546 octopci_bs_c_4(void *t, bus_space_handle_t bsh1,
  547     bus_size_t off1, bus_space_handle_t bsh2,
  548     bus_size_t off2, size_t count)
  549 {
  550         bus_addr_t addr1 = bsh1 + off1;
  551         bus_addr_t addr2 = bsh2 + off2;
  552 
  553         if (addr1 >= addr2) {
  554                 /* src after dest: copy forward */
  555                 for (; count != 0; count--, addr1 += 4, addr2 += 4)
  556                         wr32(addr2, rd32(addr1));
  557         } else {
  558                 /* dest after src: copy backwards */
  559                 for (addr1 += 4 * (count - 1), addr2 += 4 * (count - 1);
  560                     count != 0; count--, addr1 -= 4, addr2 -= 4)
  561                         wr32(addr2, rd32(addr1));
  562         }
  563 }
  564 
  565 void
  566 octopci_bs_barrier(void *t __unused, 
  567                 bus_space_handle_t bsh __unused,
  568                 bus_size_t offset __unused, bus_size_t len __unused, 
  569                 int flags)
  570 {
  571 #if 0
  572         if (flags & BUS_SPACE_BARRIER_WRITE)
  573                 mips_dcache_wbinv_all();
  574 #endif
  575 }

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