mpc85xx.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*-
    2  * Copyright (C) 2008 Semihalf, Rafal Jaworowski
    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 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 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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 
   33 #include <vm/vm.h>
   34 #include <vm/vm_param.h>
   35 
   36 #include <machine/cpu.h>
   37 #include <machine/cpufunc.h>
   38 #include <machine/spr.h>
   39 
   40 #include <powerpc/mpc85xx/ocpbus.h>
   41 #include <powerpc/mpc85xx/mpc85xx.h>
   42 
   43 /*
   44  * MPC85xx system specific routines
   45  */
   46 
   47 uint32_t
   48 ccsr_read4(uintptr_t addr)
   49 {
   50         volatile uint32_t *ptr = (void *)addr;
   51 
   52         return (*ptr);
   53 }
   54 
   55 void
   56 ccsr_write4(uintptr_t addr, uint32_t val)
   57 {
   58         volatile uint32_t *ptr = (void *)addr;
   59 
   60         *ptr = val;
   61         __asm __volatile("eieio; sync");
   62 }
   63 
   64 int
   65 law_getmax(void)
   66 {
   67         uint32_t ver;
   68 
   69         ver = SVR_VER(mfspr(SPR_SVR));
   70         if (ver == SVR_MPC8572E || ver == SVR_MPC8572)
   71                 return (12);
   72         else if (ver == SVR_MPC8548E || ver == SVR_MPC8548)
   73                 return (10);
   74         else
   75                 return (8);
   76 }
   77 
   78 #define _LAW_SR(trgt,size)      (0x80000000 | (trgt << 20) | (ffsl(size) - 2))
   79 #define _LAW_BAR(addr)          (addr >> 12)
   80 
   81 int
   82 law_enable(int trgt, u_long addr, u_long size)
   83 {
   84         uint32_t bar, sr;
   85         int i, law_max;
   86 
   87         law_max = law_getmax();
   88         bar = _LAW_BAR(addr);
   89         sr = _LAW_SR(trgt, size);
   90 
   91         /* Bail if already programmed. */
   92         for (i = 0; i < law_max; i++)
   93                 if (sr == ccsr_read4(OCP85XX_LAWSR(i)) &&
   94                     bar == ccsr_read4(OCP85XX_LAWBAR(i)))
   95                         return (0);
   96 
   97         /* Find an unused access window. */
   98         for (i = 0; i < law_max; i++)
   99                 if ((ccsr_read4(OCP85XX_LAWSR(i)) & 0x80000000) == 0)
  100                         break;
  101 
  102         if (i == law_max)
  103                 return (ENOSPC);
  104 
  105         ccsr_write4(OCP85XX_LAWBAR(i), bar);
  106         ccsr_write4(OCP85XX_LAWSR(i), sr);
  107         return (0);
  108 }
  109 
  110 int
  111 law_disable(int trgt, u_long addr, u_long size)
  112 {
  113         uint32_t bar, sr;
  114         int i, law_max;
  115 
  116         law_max = law_getmax();
  117         bar = _LAW_BAR(addr);
  118         sr = _LAW_SR(trgt, size);
  119 
  120         /* Find and disable requested LAW. */
  121         for (i = 0; i < law_max; i++)
  122                 if (sr == ccsr_read4(OCP85XX_LAWSR(i)) &&
  123                     bar == ccsr_read4(OCP85XX_LAWBAR(i))) {
  124                         ccsr_write4(OCP85XX_LAWBAR(i), 0);
  125                         ccsr_write4(OCP85XX_LAWSR(i), 0);
  126                         return (0);
  127                 }
  128 
  129         return (ENOENT);
  130 }
  131

Cache object: 6cbf18500ae258f2beb09462f3ac6517

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/powerpc/mpc85xx/mpc85xx.c

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/mpc85xx/mpc85xx.c