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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. #ifndef KERN_sparc64_PAGE_H_
  36. #define KERN_sparc64_PAGE_H_
  37.  
  38. #include <arch/mm/frame.h>
  39.  
  40. /*
  41.  * On the TLB and TSB level, we still use 8K pages, which are supported by the
  42.  * MMU.
  43.  */
  44. #define MMU_PAGE_WIDTH  MMU_FRAME_WIDTH
  45. #define MMU_PAGE_SIZE   MMU_FRAME_SIZE
  46.  
  47. /*
  48.  * On the page table level, we use 16K pages. 16K pages are not supported by
  49.  * the MMU but we emulate them with pairs of 8K pages.
  50.  */
  51. #define PAGE_WIDTH  FRAME_WIDTH
  52. #define PAGE_SIZE   FRAME_SIZE
  53.  
  54. #define MMU_PAGES_PER_PAGE  (1 << (PAGE_WIDTH - MMU_PAGE_WIDTH))
  55.  
  56. #ifdef KERNEL
  57.  
  58. #ifndef __ASM__
  59.  
  60. #include <arch/interrupt.h>
  61.  
  62. extern uintptr_t physmem_base;
  63.  
  64. #define KA2PA(x)    (((uintptr_t) (x)) + physmem_base)
  65. #define PA2KA(x)    (((uintptr_t) (x)) - physmem_base)
  66.  
  67. typedef union {
  68.     uintptr_t address;
  69.     struct {
  70.         uint64_t vpn : 51;      /**< Virtual Page Number. */
  71.         unsigned offset : 13;       /**< Offset. */
  72.     } __attribute__ ((packed));
  73. } page_address_t;
  74.  
  75. extern void page_arch_init(void);
  76.  
  77. #endif /* !def __ASM__ */
  78.  
  79. #endif /* KERNEL */
  80.  
  81. #endif
  82.  
  83. /** @}
  84.  */
  85.