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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. #include <config.h>
  44.  
  45. #ifdef CONFIG_SMP
  46. /** Entries locked in DTLB of BSP.
  47.  *
  48.  * Application processors need to have the same locked entries
  49.  * in their DTLBs as the bootstrap processor.
  50.  */
  51. static struct {
  52.     uintptr_t virt_page;
  53.     uintptr_t phys_page;
  54.     int pagesize_code;
  55. } bsp_locked_dtlb_entry[DTLB_ENTRY_COUNT];
  56.  
  57. /** Number of entries in bsp_locked_dtlb_entry array. */
  58. static count_t bsp_locked_dtlb_entries = 0;
  59. #endif /* CONFIG_SMP */
  60.  
  61. /** Perform sparc64 specific initialization of paging. */
  62. void page_arch_init(void)
  63. {
  64.     if (config.cpu_active == 1) {
  65.         page_mapping_operations = &ht_mapping_operations;
  66.     } else {
  67.  
  68. #ifdef CONFIG_SMP
  69.         int i;
  70.  
  71.         /*
  72.          * Copy locked DTLB entries from the BSP.
  73.          */    
  74.         for (i = 0; i < bsp_locked_dtlb_entries; i++) {
  75.             dtlb_insert_mapping(bsp_locked_dtlb_entry[i].virt_page,
  76.                 bsp_locked_dtlb_entry[i].phys_page, bsp_locked_dtlb_entry[i].pagesize_code,
  77.                 true, false);
  78.         }
  79. #endif 
  80.  
  81.     }
  82. }
  83.  
  84. /** Map memory-mapped device into virtual memory.
  85.  *
  86.  * So far, only DTLB is used to map devices into memory.
  87.  * Chances are that there will be only a limited amount of
  88.  * devices that the kernel itself needs to lock in DTLB.
  89.  *
  90.  * @param physaddr Physical address of the page where the
  91.  *         device is located. Must be at least
  92.  *         page-aligned.
  93.  * @param size Size of the device's registers. Must not
  94.  *         exceed 4M and must include extra space
  95.  *         caused by the alignment.
  96.  *
  97.  * @return Virtual address of the page where the device is
  98.  *     mapped.
  99.  */
  100. uintptr_t hw_map(uintptr_t physaddr, size_t size)
  101. {
  102.     unsigned int order;
  103.     int i;
  104.  
  105.     ASSERT(config.cpu_active == 1);
  106.  
  107.     struct {
  108.         int pagesize_code;
  109.         size_t increment;
  110.         count_t count;
  111.     } sizemap[] = {
  112.         { PAGESIZE_8K, 0, 1 },          /* 8K */
  113.         { PAGESIZE_8K, PAGE_SIZE, 2 },      /* 16K */
  114.         { PAGESIZE_8K, PAGE_SIZE, 4 },      /* 32K */
  115.         { PAGESIZE_64K, 0, 1},          /* 64K */
  116.         { PAGESIZE_64K, 8*PAGE_SIZE, 2 },   /* 128K */
  117.         { PAGESIZE_64K, 8*PAGE_SIZE, 4 },   /* 256K */
  118.         { PAGESIZE_512K, 0, 1 },        /* 512K */
  119.         { PAGESIZE_512K, 64*PAGE_SIZE, 2 }, /* 1M */
  120.         { PAGESIZE_512K, 64*PAGE_SIZE, 4 }, /* 2M */
  121.         { PAGESIZE_4M, 0, 1 },          /* 4M */
  122.         { PAGESIZE_4M, 512*PAGE_SIZE, 2 }   /* 8M */
  123.     };
  124.    
  125.     ASSERT(ALIGN_UP(physaddr, PAGE_SIZE) == physaddr);
  126.     ASSERT(size <= 8*1024*1024);
  127.    
  128.     if (size <= FRAME_SIZE)
  129.         order = 0;
  130.     else
  131.         order = (fnzb64(size - 1) + 1) - FRAME_WIDTH;
  132.  
  133.     /*
  134.      * Use virtual addresses that are beyond the limit of physical memory.
  135.      * Thus, the physical address space will not be wasted by holes created
  136.      * by frame_alloc().
  137.      */
  138.     ASSERT(last_frame);
  139.     uintptr_t virtaddr = ALIGN_UP(last_frame, 1<<(order + FRAME_WIDTH));
  140.     last_frame = ALIGN_UP(virtaddr + size, 1<<(order + FRAME_WIDTH));
  141.    
  142.     for (i = 0; i < sizemap[order].count; i++) {
  143.         /*
  144.          * First, insert the mapping into DTLB.
  145.          */
  146.         dtlb_insert_mapping(virtaddr + i*sizemap[order].increment,
  147.                     physaddr + i*sizemap[order].increment,
  148.                     sizemap[order].pagesize_code, true, false);
  149.    
  150. #ifdef CONFIG_SMP  
  151.         /*
  152.          * Second, save the information about the mapping for APs.
  153.          */
  154.         bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].virt_page = virtaddr + i*sizemap[order].increment;
  155.         bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].phys_page = physaddr + i*sizemap[order].increment;
  156.         bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].pagesize_code = sizemap[order].pagesize_code;
  157.         bsp_locked_dtlb_entries++;
  158. #endif
  159.     }
  160.    
  161.     return virtaddr;
  162. }
  163.  
  164. /** @}
  165.  */
  166.