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  1. /*
  2.  * Copyright (C) 2005 Ondrej Palkovsky
  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. #ifndef __amd64_PAGE_H__
  30. #define __amd64_PAGE_H__
  31.  
  32. #ifndef __ASM__
  33. #  include <mm/page.h>
  34. #  include <arch/mm/frame.h>
  35. #  include <arch/types.h>
  36. #endif
  37.  
  38. #define PAGE_SIZE   FRAME_SIZE
  39.  
  40. #ifndef __ASM__
  41. # define KA2PA(x)      (((__address) (x)) - 0xffffffff80000000)
  42. # define PA2KA(x)      (((__address) (x)) + 0xffffffff80000000)
  43. #else
  44. # define KA2PA(x)      ((x) - 0xffffffff80000000)
  45. # define PA2KA(x)      ((x) + 0xffffffff80000000)
  46. #endif
  47.  
  48. #define PTL0_INDEX_ARCH(vaddr)  (((vaddr)>>39)&0x1ff)
  49. #define PTL1_INDEX_ARCH(vaddr)  (((vaddr)>>30)&0x1ff)
  50. #define PTL2_INDEX_ARCH(vaddr)  (((vaddr)>>21)&0x1ff)
  51. #define PTL3_INDEX_ARCH(vaddr)  (((vaddr)>>12)&0x1ff)
  52.  
  53. #define GET_PTL0_ADDRESS_ARCH()         ((pte_t *) read_cr3())
  54. #define GET_PTL1_ADDRESS_ARCH(ptl0, i)      ((pte_t *) ((((__u64) ((pte_t *)(ptl0))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 )))
  55. #define GET_PTL2_ADDRESS_ARCH(ptl1, i)      ((pte_t *) ((((__u64) ((pte_t *)(ptl1))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 )))
  56. #define GET_PTL3_ADDRESS_ARCH(ptl2, i)      ((pte_t *) ((((__u64) ((pte_t *)(ptl2))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 )))
  57. #define GET_FRAME_ADDRESS_ARCH(ptl3, i)     ((__address *) ((((__u64) ((pte_t *)(ptl3))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 )))
  58.  
  59. #define SET_PTL0_ADDRESS_ARCH(ptl0)     (write_cr3((__address) (ptl0)))
  60. #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)   set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)
  61. #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)       set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)
  62. #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)       set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)
  63. #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)  set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)
  64.  
  65. #define GET_PTL1_FLAGS_ARCH(ptl0, i)        get_pt_flags((pte_t *)(ptl0), (index_t)(i))
  66. #define GET_PTL2_FLAGS_ARCH(ptl1, i)        get_pt_flags((pte_t *)(ptl1), (index_t)(i))
  67. #define GET_PTL3_FLAGS_ARCH(ptl2, i)        get_pt_flags((pte_t *)(ptl2), (index_t)(i))
  68. #define GET_FRAME_FLAGS_ARCH(ptl3, i)       get_pt_flags((pte_t *)(ptl3), (index_t)(i))
  69.  
  70. #define SET_PTL1_FLAGS_ARCH(ptl0, i, x)     set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
  71. #define SET_PTL2_FLAGS_ARCH(ptl1, i, x)         set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))
  72. #define SET_PTL3_FLAGS_ARCH(ptl2, i, x)         set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))
  73. #define SET_FRAME_FLAGS_ARCH(ptl3, i, x)    set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
  74.  
  75. #ifndef __ASM__
  76.  
  77. struct page_specifier {
  78.     unsigned present : 1;
  79.     unsigned writeable : 1;
  80.     unsigned uaccessible : 1;
  81.     unsigned page_write_through : 1;
  82.     unsigned page_cache_disable : 1;
  83.     unsigned accessed : 1;
  84.     unsigned dirty : 1;
  85.     unsigned unused: 1;
  86.     unsigned global : 1;
  87.     unsigned avl : 3;
  88.     unsigned addr_12_31 : 30;
  89.     unsigned addr_32_51 : 21;
  90.     unsigned no_execute : 1;
  91. } __attribute__ ((packed));
  92.  
  93. static inline int get_pt_flags(pte_t *pt, index_t i)
  94. {
  95.     pte_t *p = &pt[i];
  96.    
  97.     return (
  98.         (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT |
  99.         (!p->present)<<PAGE_PRESENT_SHIFT |
  100.         p->uaccessible<<PAGE_USER_SHIFT |
  101.         1<<PAGE_READ_SHIFT |
  102.         p->writeable<<PAGE_WRITE_SHIFT |
  103.         (!p->no_execute)<<PAGE_EXEC_SHIFT
  104.     );
  105. }
  106.  
  107. static inline void set_pt_addr(pte_t *pt, index_t i, __address a)
  108. {
  109.     pte_t *p = &pt[i];
  110.  
  111.     p->addr_12_31 = (a >> 12) & 0xfffff;
  112.     p->addr_32_51 = a >> 32;
  113. }
  114.  
  115. static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
  116. {
  117.     pte_t *p = &pt[i];
  118.    
  119.     p->page_cache_disable = !(flags & PAGE_CACHEABLE);
  120.     p->present = !(flags & PAGE_NOT_PRESENT);
  121.     p->uaccessible = (flags & PAGE_USER) != 0;
  122.     p->writeable = (flags & PAGE_WRITE) != 0;
  123.     p->no_execute = (flags & PAGE_EXEC) == 0;
  124. }
  125.  
  126. extern void page_arch_init(void);
  127.  
  128. #endif
  129.  
  130. #endif
  131.