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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  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.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup sparc64mm  
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch/mm/page.h>
  36. #include <arch/mm/tlb.h>
  37. #include <genarch/mm/page_ht.h>
  38. #include <mm/frame.h>
  39. #include <arch/mm/frame.h>
  40. #include <bitops.h>
  41. #include <debug.h>
  42. #include <align.h>
  43.  
  44. void page_arch_init(void)
  45. {
  46.     page_mapping_operations = &ht_mapping_operations;
  47. }
  48.  
  49. uintptr_t hw_map(uintptr_t physaddr, size_t size)
  50. {
  51.     unsigned int order;
  52.     int i;
  53.  
  54.     struct {
  55.         int pagesize;
  56.         size_t increment;
  57.         count_t count;
  58.     } sizemap[] = {
  59.         { PAGESIZE_8K, 0, 1 },          /* 8K */
  60.         { PAGESIZE_8K, PAGE_SIZE, 2 },      /* 16K */
  61.         { PAGESIZE_8K, PAGE_SIZE, 4 },      /* 32K */
  62.         { PAGESIZE_64K, 0, 1},          /* 64K */
  63.         { PAGESIZE_64K, 8*PAGE_SIZE, 2 },   /* 128K */
  64.         { PAGESIZE_64K, 8*PAGE_SIZE, 4 },   /* 256K */
  65.         { PAGESIZE_512K, 0, 1 },        /* 512K */
  66.         { PAGESIZE_512K, 64*PAGE_SIZE, 2 }, /* 1M */
  67.         { PAGESIZE_512K, 64*PAGE_SIZE, 4 }, /* 2M */
  68.         { PAGESIZE_4M, 0, 1 }           /* 4M */
  69.     };
  70.    
  71.     ASSERT(size <= 4*1024*1024);
  72.    
  73.     if (size <= FRAME_SIZE)
  74.         order = 0;
  75.     else
  76.         order = (fnzb32(size - 1) + 1) - FRAME_WIDTH;
  77.  
  78.     /*
  79.      * Use virtual addresses that are beyond the limit of physical memory.
  80.      * Thus, the physical address space will not be wasted by holes created
  81.      * by frame_alloc().
  82.      */
  83.     ASSERT(last_frame);
  84.     uintptr_t virtaddr = ALIGN_UP(last_frame, 1<<(order + FRAME_WIDTH));
  85.     last_frame = ALIGN_UP(virtaddr + size, 1<<(order + FRAME_WIDTH));
  86.    
  87.     for (i = 0; i < sizemap[order].count; i++)
  88.         dtlb_insert_mapping(virtaddr + i*sizemap[order].increment,
  89.                     physaddr + i*sizemap[order].increment,
  90.                     sizemap[order].pagesize, true, false);
  91.    
  92.     return virtaddr;
  93. }
  94.  
  95. /** @}
  96.  */
  97.