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  1. /*
  2.  * Copyright (c) 2009 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. /** Perform sparc64 specific initialization of paging. */
  46. void page_arch_init(void)
  47. {
  48.     if (config.cpu_active == 1)
  49.         page_mapping_operations = &ht_mapping_operations;
  50. }
  51.  
  52. /** Map memory-mapped device into virtual memory.
  53.  *
  54.  * We are currently using identity mapping for mapping device registers.
  55.  *
  56.  * @param physaddr  Physical address of the page where the device is
  57.  *          located.
  58.  * @param size      Size of the device's registers. This argument is
  59.  *          ignored.
  60.  *
  61.  * @return      Virtual address of the page where the device is mapped.
  62.  */
  63. uintptr_t hw_map(uintptr_t physaddr, size_t size)
  64. {
  65.     if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
  66.         panic("Unable to map physical memory %p (%d bytes).", physaddr, size)
  67.    
  68.     uintptr_t virtaddr = PA2KA(last_frame);
  69.     pfn_t i;
  70.     for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) {
  71.         uintptr_t addr = PFN2ADDR(i);
  72.         page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE | PAGE_WRITE);
  73.     }
  74.    
  75.     last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
  76.    
  77.     return virtaddr;
  78. }
  79.  
  80. /** @}
  81.  */
  82.