release/src-rt-6.x.4708/cfe/cfe/arch/mips/cpu/rm5200/src/rm5200_arena.c

   1 /*  *********************************************************************
   2     *  Broadcom Common Firmware Environment (CFE)
   3     *
   4     *  Physical Memory (arena) manager          File: rm5200_arena.c
   5     *
   6     *  This module describes the physical memory available to the
   7     *  firmware.
   8     *
   9     *  Author:  Mitch Lichtenberg (mpl@broadcom.com)
  10     *
  11     *********************************************************************
  12     *
  13     *  Copyright 2000,2001,2002,2003
  14     *  Broadcom Corporation. All rights reserved.
  15     *
  16     *  This software is furnished under license and may be used and
  17     *  copied only in accordance with the following terms and
  18     *  conditions.  Subject to these conditions, you may download,
  19     *  copy, install, use, modify and distribute modified or unmodified
  20     *  copies of this software in source and/or binary form.  No title
  21     *  or ownership is transferred hereby.
  22     *
  23     *  1) Any source code used, modified or distributed must reproduce
  24     *     and retain this copyright notice and list of conditions
  25     *     as they appear in the source file.
  26     *
  27     *  2) No right is granted to use any trade name, trademark, or
  28     *     logo of Broadcom Corporation.  The "Broadcom Corporation"
  29     *     name may not be used to endorse or promote products derived
  30     *     from this software without the prior written permission of
  31     *     Broadcom Corporation.
  32     *
  33     *  3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
  34     *     IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
  35     *     WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  36     *     PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
  37     *     SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
  38     *     PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
  39     *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  40     *     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  41     *     GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  42     *     BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  43     *     OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  44     *     TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
  45     *     THE POSSIBILITY OF SUCH DAMAGE.
  46     ********************************************************************* */
  47
  48 #include "sbmips.h"
  49
  50 #include "lib_types.h"
  51 #include "lib_string.h"
  52 #include "lib_queue.h"
  53 #include "lib_malloc.h"
  54 #include "lib_printf.h"
  55 #include "lib_arena.h"
  56
  57 #include "cfe_error.h"
  58
  59 #include "cfe.h"
  60 #include "cfe_mem.h"
  61
  62 #include "initdata.h"
  63
  64 #define _NOPROTOS_
  65 #include "cfe_boot.h"
  66 #undef _NOPROTOS_
  67
  68
  69 /*  *********************************************************************
  70     *  Macros
  71     ********************************************************************* */
  72
  73 #define ARENA_RANGE(bottom,top,type) arena_markrange(&cfe_arena,(uint64_t)(bottom), \
  74                                      (uint64_t)(top)-(uint64_t)bottom+1,(type),NULL)
  75
  76 #define MEG     (1024*1024)
  77 #define KB      1024
  78 #define PAGESIZE 4096
  79 #define CFE_BOOTAREA_SIZE (256*KB)
  80 #define CFE_BOOTAREA_ADDR 0x20000000
  81
  82 /*  *********************************************************************
  83     *  Globals
  84     ********************************************************************* */
  85
  86 extern arena_t cfe_arena;
  87
  88 unsigned int mem_bootarea_start;
  89 unsigned int mem_bootarea_size;
  90
  91 void rm5200_arena_init(void);
  92 void rm5200_pagetable_init(uint64_t *ptaddr,unsigned int physaddr);
  93
  94
  95 /*  *********************************************************************
  96     *  rm5200_arena_init()
  97     *
  98     *  Create the initial map of physical memory
  99     *
 100     *  Input parameters:
 101     *      nothing
 102     *
 103     *  Return value:
 104     *      nothing
 105     ********************************************************************* */
 106
 107 void rm5200_arena_init(void)
 108 {
 109     int64_t memleft;
 110     int64_t mem256 = (256*1024*1024);           /* 256 MBytes */
 111     int64_t memamt;
 112
 113     arena_init(&cfe_arena,0x0,0x100000000);
 114
 115     /*
 116      * Mark the ranges from the RM5200's memory map
 117      */
 118
 119     ARENA_RANGE(0x0000000000,0x000FFFFFFF,MEMTYPE_DRAM_NOTINSTALLED);
 120
 121     /*
 122      * Mark LDT and PCI regions
 123      */
 124
 125
 126     /*
 127      * Now, fix up the map with what is known about *this* system.
 128      *
 129      * Do each 256MB chunk.
 130      */
 131
 132     memleft = ((int64_t) mem_totalsize) << 20;
 133
 134     memamt = (memleft > mem256) ? mem256 : memleft;
 135
 136     arena_markrange(&cfe_arena,0x00000000,memamt,MEMTYPE_DRAM_AVAILABLE,NULL);
 137
 138     /*
 139      * Note: we don't deal with RM5200 boards with >256MB memory.  Big deal.
 140      */
 141
 142     /*
 143      * Do the boot ROM
 144      */
 145
 146     arena_markrange(&cfe_arena,0x1FC00000,2*1024*1024,MEMTYPE_BOOTROM,NULL);
 147
 148 }
 149
 150
 151 /*  *********************************************************************
 152     *  RM5200_PAGETABLE_INIT(ptaddr,physaddr)
 153     *
 154     *  This routine constructs the page table.  256KB is mapped
 155     *  starting at physical address 'physaddr' - the resulting
 156     *  table entries are placed at 'ptaddr'
 157     *
 158     *  Input parameters:
 159     *      ptaddr - base of page table
 160     *      physaddr - starting physical addr of area to map
 161     *
 162     *  Return value:
 163     *      nothing
 164     ********************************************************************* */
 165
 166 void rm5200_pagetable_init(uint64_t *ptaddr,unsigned int physaddr)
 167 {
 168     int idx;
 169
 170     for (idx = 0; idx < (CFE_BOOTAREA_SIZE/PAGESIZE); idx++) {
 171         ptaddr[idx] = (physaddr >> 6) |
 172             V_TLBLO_CALG(K_CALG_NONCOHERENT) |
 173             M_TLBLO_V |
 174             M_TLBLO_D;
 175         physaddr += PAGESIZE;
 176         }
 177
 178 }