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  1. /*
  2.  * Copyright (c) 2003-2004 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 arm32mm
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch/mm/page.h>
  36. #include <genarch/mm/page_pt.h>
  37. #include <mm/page.h>
  38. #include <align.h>
  39. #include <config.h>
  40. #include "../aux_print/printf.h"
  41.  
  42. void page_arch_init(void)
  43. {
  44.     aux_printf("page_arch_init\n");
  45.  
  46.     uintptr_t cur;
  47.     int flags;
  48.  
  49.     page_mapping_operations = &pt_mapping_operations;
  50.  
  51.     flags = PAGE_CACHEABLE;
  52.     const unsigned maxmem = ALIGN_DOWN(config.memory_size, FRAME_SIZE);
  53.    
  54.     for (cur = 0; cur < maxmem; cur += FRAME_SIZE) {
  55.         page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
  56.     }    
  57.     //TODO set page fault routines
  58.     // no problem no ... kernel doesn't do page faults
  59.    
  60.    
  61.     asm volatile (
  62.     "ldr r0, =0x55555555       \n"
  63.     "mrc p15, 0, r0, c3, c0, 0 \n" //set domain acces rights to client <==> take rights from page tables
  64.     "mcr p15, 0, r0, c1, c0, 0 \n" // get current setting of system ... register 1 isn't only for memmory management
  65.     "ldr r1, =0xFFFFFE8D       \n" // mask to disable aligment checks, System, Rom bit disable
  66.     "and r0, r0, r1            \n"
  67.     "ldr r1, =0x00000001       \n" // mask to enable paging
  68.     "orr r0, r0, r1            \n"
  69.     "mrc p15, 0, r0, c1, c0, 0 \n" // store setting
  70.     :
  71.     :
  72.     : "r0", "r1"
  73.     );
  74. }
  75.  
  76. /** Map device into kernel space. */
  77. uintptr_t hw_map(uintptr_t physaddr, size_t size)
  78. {
  79.     /* TODO */
  80.     return NULL;
  81. }
  82.  
  83. /** @}
  84.  */
  85.  
  86.