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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_PHYSICAL_ADDRESS 0x0000
  34. #define KERNEL_VIRTUAL_ADDRESS 0x80000000
  35. #define KERNEL_BOOT_OFFSET 0x2000
  36. #define KERNEL_START &_binary_____________kernel_kernel_bin_start
  37. #define KERNEL_END &_binary_____________kernel_kernel_bin_end
  38. #define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START)
  39.  
  40. memmap_t memmap;
  41.  
  42. void bootstrap(void)
  43. {
  44.     printf("\nHelenOS PPC Bootloader\n");
  45.    
  46.     void *phys = ofw_translate(&start);
  47.     printf("loaded at %L (physical %L)\n", &start, phys);
  48.    
  49.     if (!ofw_memmap(&memmap)) {
  50.         printf("Unable to get memory map\n");
  51.         halt();
  52.     }
  53.     printf("total memory %d MB\n", memmap.total >> 20);
  54.    
  55.     // FIXME: map just the kernel
  56.     if (ofw_map((void *) KERNEL_PHYSICAL_ADDRESS, (void *) KERNEL_VIRTUAL_ADDRESS, memmap.total - 64 * 1024 * 1024, 0) != 0) {
  57.         printf("Unable to map kernel memory at %L (physical %L)\n", KERNEL_VIRTUAL_ADDRESS, KERNEL_PHYSICAL_ADDRESS);
  58.         halt();
  59.     }
  60.     printf("kernel memory mapped at %L (physical %L, size %d bytes)\n", KERNEL_VIRTUAL_ADDRESS, KERNEL_PHYSICAL_ADDRESS, KERNEL_SIZE);
  61.     // FIXME: relocate the kernel in real mode
  62.     memcpy((void *) KERNEL_VIRTUAL_ADDRESS, KERNEL_START, KERNEL_SIZE);
  63.    
  64.     // FIXME: proper hardware detection & mapping
  65.     ofw_map((void *) 0x84000000, (void *) 0xf0000000, 0x01000000, 0);
  66.     ofw_map((void *) 0x80816000, (void *) 0xf2000000, 0x00018000, 0);
  67.    
  68.     printf("Booting the kernel...\n");
  69.    
  70.     flush_instruction_cache();
  71.     jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS + KERNEL_BOOT_OFFSET, ofw_translate(&memmap));
  72. }
  73.