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  1. /*
  2.  * Copyright (c) 2007 Pavel Jancik, Michal Kebrt
  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 <arch/exception.h>
  41. #include <typedefs.h>
  42. #include <arch/types.h>
  43. #include <interrupt.h>
  44. #include <arch/debug_print/print.h>
  45.  
  46.  
  47. /**
  48.  * Initializes kernel adress space page tables, sets abourts exceptions vectors
  49.  */
  50. void page_arch_init(void)
  51. {
  52.     uintptr_t cur;
  53.     int flags;
  54.  
  55.     page_mapping_operations = &pt_mapping_operations;
  56.  
  57.     flags = PAGE_CACHEABLE;
  58.  
  59.     /* PA2KA(identity) mapping for all frames until last_frame */
  60.     for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
  61.         page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
  62.     }
  63.    
  64.     // Create mapping for exception table at high offcet
  65.     #ifdef HIGH_EXCEPTION_VECTORS
  66.     /* Note: this mapping cann't be done by hw_map because fixed exception
  67.        vector is stored at fixed virtual address
  68.      */
  69.     // reserve frame for exception table
  70.     void* virtaddr = frame_alloc( ONE_FRAME ,FRAME_KA);
  71.     page_mapping_insert(AS_KERNEL, EXC_BASE_ADDRESS, KA2PA(virtaddr), flags );
  72.     #endif
  73.  
  74.     // TODO: move to the kernel space
  75. //  page_mapping_insert(AS_KERNEL, 0xffff0000, 0x00000000, flags);
  76.     // TODO: remove when aux_printf not needed
  77.     page_mapping_insert(AS_KERNEL, 0x10000000, 0x10000000, flags);
  78.  
  79.  
  80.     as_switch(NULL, AS_KERNEL);
  81.  
  82. }
  83.  
  84. /**
  85.  * Map device into kernel space.
  86.  *
  87.  * This function adds mapping of physical address that is read/write only
  88.  *  from kernel and not bufferable.
  89.  *
  90.  * \param physaddr Physical addres where device is connected
  91.  * \param size Length of area where device is present
  92.  * \return Virtual address where device will be accessable
  93.  * Note: This is copy of IA32 hw_map code
  94.  */
  95. uintptr_t hw_map(uintptr_t physaddr, size_t size)
  96. {
  97.     if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
  98.         panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
  99.  
  100.     uintptr_t virtaddr = PA2KA(last_frame);
  101.     pfn_t i;
  102.     for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
  103.         page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE | PAGE_READ | PAGE_WRITE | PAGE_KERNEL);
  104.  
  105.     last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
  106.  
  107.     return virtaddr;
  108. }
  109.  
  110.  
  111. /** @}
  112.  */
  113.  
  114.