The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
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  * $FreeBSD$
   66  */
   67 #include <sys/cdefs.h>
   68 __FBSDID("$FreeBSD$");
   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,
  227               bus_size_t offset, bus_size_t size __unused,
  228               bus_space_handle_t *bshp)
  229 {
  230 
  231         *bshp = handle + offset;
  232         return (0);
  233 }
  234 
  235 uint8_t
  236 octopci_bs_r_1(void *t, bus_space_handle_t handle,
  237     bus_size_t offset)
  238 {
  239 
  240         return (rd8(handle + offset));
  241 }
  242 
  243 uint16_t
  244 octopci_bs_r_2(void *t, bus_space_handle_t handle,
  245     bus_size_t offset)
  246 {
  247 
  248         return (rd16(handle + offset));
  249 }
  250 
  251 uint32_t
  252 octopci_bs_r_4(void *t, bus_space_handle_t handle,
  253     bus_size_t offset)
  254 {
  255 
  256         return (rd32(handle + offset));
  257 }
  258 
  259 
  260 void
  261 octopci_bs_rm_1(void *t, bus_space_handle_t bsh,
  262     bus_size_t offset, uint8_t *addr, size_t count)
  263 {
  264 
  265         while (count--)
  266                 *addr++ = rd8(bsh + offset);
  267 }
  268 
  269 void
  270 octopci_bs_rm_2(void *t, bus_space_handle_t bsh,
  271     bus_size_t offset, uint16_t *addr, size_t count)
  272 {
  273         bus_addr_t baddr = bsh + offset;
  274 
  275         while (count--)
  276                 *addr++ = rd16(baddr);
  277 }
  278 
  279 void
  280 octopci_bs_rm_4(void *t, bus_space_handle_t bsh,
  281     bus_size_t offset, uint32_t *addr, size_t count)
  282 {
  283         bus_addr_t baddr = bsh + offset;
  284 
  285         while (count--)
  286                 *addr++ = rd32(baddr);
  287 }
  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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