Subversion Repositories HelenOS

Rev

Rev 3743 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  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/pagesize.h>
  37. #include <arch/mm/sun4u/tlb.h>
  38. #include <arch/mm/sun4u/tlb.h>
  39. #include <genarch/mm/page_ht.h>
  40. #include <mm/frame.h>
  41. #include <arch/mm/frame.h>
  42. #include <bitops.h>
  43. #include <debug.h>
  44. #include <align.h>
  45. #include <config.h>
  46.  
  47. #ifdef CONFIG_SMP
  48. /** Entries locked in DTLB of BSP.
  49.  *
  50.  * Application processors need to have the same locked entries in their DTLBs as
  51.  * the bootstrap processor.
  52.  */
  53. static struct {
  54.     uintptr_t virt_page;
  55.     uintptr_t phys_page;
  56.     int pagesize_code;
  57. } bsp_locked_dtlb_entry[DTLB_MAX_LOCKED_ENTRIES];
  58.  
  59. /** Number of entries in bsp_locked_dtlb_entry array. */
  60. static count_t bsp_locked_dtlb_entries = 0;
  61. #endif /* CONFIG_SMP */
  62.  
  63. /** Perform sparc64 specific initialization of paging. */
  64. void page_arch_init(void)
  65. {
  66.     if (config.cpu_active == 1) {
  67.         page_mapping_operations = &ht_mapping_operations;
  68.     } else {
  69.  
  70. #ifdef CONFIG_SMP
  71.         unsigned int i;
  72.  
  73.         /*
  74.          * Copy locked DTLB entries from the BSP.
  75.          */    
  76.         for (i = 0; i < bsp_locked_dtlb_entries; i++) {
  77.             dtlb_insert_mapping(bsp_locked_dtlb_entry[i].virt_page,
  78.                 bsp_locked_dtlb_entry[i].phys_page,
  79.                 bsp_locked_dtlb_entry[i].pagesize_code, true,
  80.                 false);
  81.         }
  82. #endif 
  83.  
  84.     }
  85. }
  86.  
  87. /** Map memory-mapped device into virtual memory.
  88.  *
  89.  * So far, only DTLB is used to map devices into memory. Chances are that there
  90.  * will be only a limited amount of devices that the kernel itself needs to
  91.  * lock in DTLB.
  92.  *
  93.  * @param physaddr Physical address of the page where the device is located.
  94.  *  Must be at least page-aligned.
  95.  * @param size Size of the device's registers. Must not exceed 4M and must
  96.  *  include extra space caused by the alignment.
  97.  *
  98.  * @return Virtual address of the page where the device is mapped.
  99.  */
  100. uintptr_t hw_map(uintptr_t physaddr, size_t size)
  101. {
  102.     unsigned int order;
  103.     unsigned 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, MMU_PAGE_SIZE, 2 },      /* 16K */
  114.         { PAGESIZE_8K, MMU_PAGE_SIZE, 4 },      /* 32K */
  115.         { PAGESIZE_64K, 0, 1},              /* 64K */
  116.         { PAGESIZE_64K, 8 * MMU_PAGE_SIZE, 2 },     /* 128K */
  117.         { PAGESIZE_64K, 8 * MMU_PAGE_SIZE, 4 },     /* 256K */
  118.         { PAGESIZE_512K, 0, 1 },            /* 512K */
  119.         { PAGESIZE_512K, 64 * MMU_PAGE_SIZE, 2 },   /* 1M */
  120.         { PAGESIZE_512K, 64 * MMU_PAGE_SIZE, 4 },   /* 2M */
  121.         { PAGESIZE_4M, 0, 1 },              /* 4M */
  122.         { PAGESIZE_4M, 512 * MMU_PAGE_SIZE, 2 }     /* 8M */
  123.     };
  124.    
  125.     ASSERT(ALIGN_UP(physaddr, MMU_PAGE_SIZE) == physaddr);
  126.     ASSERT(size <= 8 * 1024 * 1024);
  127.    
  128.     if (size <= MMU_FRAME_SIZE)
  129.         order = 0;
  130.     else
  131.         order = (fnzb64(size - 1) + 1) - MMU_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(PA2KA(last_frame));
  139.     uintptr_t virtaddr = ALIGN_UP(PA2KA(last_frame),
  140.         1 << (order + FRAME_WIDTH));
  141.     last_frame = ALIGN_UP(KA2PA(virtaddr) + size,
  142.         1 << (order + FRAME_WIDTH));
  143.    
  144.     for (i = 0; i < sizemap[order].count; i++) {
  145.         /*
  146.          * First, insert the mapping into DTLB.
  147.          */
  148.         dtlb_insert_mapping(virtaddr + i * sizemap[order].increment,
  149.             physaddr + i * sizemap[order].increment,
  150.             sizemap[order].pagesize_code, true, false);
  151.    
  152. #ifdef CONFIG_SMP  
  153.         /*
  154.          * Second, save the information about the mapping for APs.
  155.          */
  156.         bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].virt_page =
  157.             virtaddr + i * sizemap[order].increment;
  158.         bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].phys_page =
  159.             physaddr + i * sizemap[order].increment;
  160.         bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].pagesize_code =
  161.             sizemap[order].pagesize_code;
  162.         bsp_locked_dtlb_entries++;
  163. #endif
  164.     }
  165.    
  166.     return virtaddr;
  167. }
  168.  
  169. /** @}
  170.  */
  171.  
  172.