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  1. /*
  2.  * Copyright (C) 2005 Martin Decky
  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. #include "main.h"
  30. #include "printf.h"
  31. #include "asm.h"
  32.  
  33. #define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start)
  34. #define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end)
  35. #define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START)
  36.  
  37. memmap_t memmap;
  38.  
  39.  
  40. static void check_align(const void *addr, const char *desc)
  41. {
  42.     if ((unsigned int) addr % PAGE_SIZE != 0) {
  43.         printf("Error: %s not on page boundary\n", desc);
  44.         halt();
  45.     }
  46. }
  47.  
  48.  
  49. static void check_overlap(const void *addr, const char *desc)
  50. {
  51.     if ((unsigned int) addr < KERNEL_SIZE) {
  52.         printf("Error: %s overlaps kernel physical area\n", desc);
  53.         halt();
  54.     }
  55. }
  56.  
  57.  
  58. void bootstrap(void)
  59. {
  60.     printf("\nHelenOS PPC Bootloader\n");
  61.    
  62.     check_align(KERNEL_START, "Kernel image");
  63.     check_align(&real_mode, "Bootstrap trampoline");
  64.     check_align(&trans, "Translation table");
  65.    
  66.     if (!ofw_memmap(&memmap)) {
  67.         printf("Error: Unable to get memory map\n");
  68.         halt();
  69.     }
  70.    
  71.     void *real_mode_pa = ofw_translate(&real_mode);
  72.     void *trans_pa = ofw_translate(&trans);
  73.     void *memmap_pa = ofw_translate(&memmap);
  74.    
  75.     check_overlap(real_mode_pa, "Bootstrap trampoline");
  76.     check_overlap(trans_pa, "Translation table");
  77.     check_overlap(memmap_pa, "Memory map");
  78.    
  79.     printf("Memory statistics (total %d MB)\n", memmap.total >> 20);
  80.     printf(" kernel image         at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE);
  81.     printf(" memory map           at %L (physical %L)\n", &memmap, memmap_pa);
  82.     printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa);
  83.     printf(" translation table    at %L (physical %L)\n", &trans, trans_pa);
  84.    
  85.     unsigned int addr;
  86.     for (addr = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE) {
  87.         void *pa = ofw_translate(KERNEL_START + addr);
  88.         check_overlap(pa, "Kernel image");
  89.         trans[addr >> PAGE_WIDTH] = pa;
  90.     }
  91.    
  92.     printf("Booting the kernel...\n");
  93.     jump_to_kernel(memmap_pa, trans_pa, KERNEL_SIZE, real_mode_pa);
  94. }
  95.