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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. #include "_components.h"
  33. #include <ofw.h>
  34. #include <align.h>
  35. #include <macros.h>
  36.  
  37. #define HEAP_GAP 1024000
  38.  
  39. bootinfo_t bootinfo;
  40.  
  41.  
  42. static void check_align(const void *addr, const char *desc)
  43. {
  44.     if ((unsigned int) addr % PAGE_SIZE != 0) {
  45.         printf("Error: %s not on page boundary, halting.\n", desc);
  46.         halt();
  47.     }
  48. }
  49.  
  50.  
  51. static void fix_overlap(void *va, void **pa, const char *desc, unsigned int *top)
  52. {
  53.     if ((unsigned int) *pa + PAGE_SIZE < *top) {
  54.         printf("Warning: %s overlaps kernel physical area\n", desc);
  55.        
  56.         void *new_va = (void *) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top);
  57.         void *new_pa = (void *) (HEAP_GAP + *top);
  58.         *top += PAGE_SIZE;
  59.        
  60.         if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) {
  61.             printf("Error: Unable to map page aligned memory at %L (physical %L), halting.\n", new_va, new_pa);
  62.             halt();
  63.         }
  64.        
  65.         if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) {
  66.             printf("Error: %s cannot be relocated, halting.\n", desc);
  67.             halt();
  68.         }
  69.        
  70.         printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa);
  71.         *pa = new_pa;
  72.         memcpy(new_va, va, PAGE_SIZE);
  73.     }
  74. }
  75.  
  76. char *release = STRING(RELEASE);
  77.  
  78. #ifdef REVISION
  79.     char *revision = ", revision " STRING(REVISION);
  80. #else
  81.     char *revision = "";
  82. #endif
  83.  
  84. #ifdef TIMESTAMP
  85.     char *timestamp = "\nBuilt on " STRING(TIMESTAMP);
  86. #else
  87.     char *timestamp = "";
  88. #endif
  89.  
  90. /** Print version information. */
  91. static void version_print(void)
  92. {
  93.     printf("HelenOS PPC32 Bootloader\nRelease %s%s%s\nCopyright (c) 2006 HelenOS project\n\n", release, revision, timestamp);
  94. }
  95.  
  96. void bootstrap(void)
  97. {
  98.     version_print();
  99.    
  100.     component_t components[COMPONENTS];
  101.     init_components(components);
  102.        
  103.     unsigned int i;
  104.     for (i = 0; i < COMPONENTS; i++)
  105.         check_align(components[i].start, components[i].name);
  106.    
  107.     check_align(&real_mode, "bootstrap trampoline");
  108.     check_align(&trans, "translation table");
  109.    
  110.     if (!ofw_memmap(&bootinfo.memmap)) {
  111.         printf("Error: Unable to get memory map, halting.\n");
  112.         halt();
  113.     }
  114.    
  115.     if (bootinfo.memmap.total == 0) {
  116.         printf("Error: No memory detected, halting.\n");
  117.         halt();
  118.     }
  119.    
  120.     if (!ofw_screen(&bootinfo.screen))
  121.         printf("Warning: Unable to get screen properties.\n");
  122.    
  123.     if (!ofw_macio(&bootinfo.macio))
  124.         printf("Warning: Unable to get macio properties.\n");
  125.    
  126.     printf("Device statistics\n");
  127.    
  128.     if (bootinfo.screen.addr)
  129.         printf(" screen at %L, resolution %dx%d, %d bpp (scanline %d bytes)\n", bootinfo.screen.addr, bootinfo.screen.width, bootinfo.screen.height, bootinfo.screen.bpp, bootinfo.screen.scanline);
  130.    
  131.     if (bootinfo.macio.addr)
  132.         printf(" macio at %L (size %d bytes)\n", bootinfo.macio.addr, bootinfo.macio.size);
  133.    
  134.     void *real_mode_pa = ofw_translate(&real_mode);
  135.     void *trans_pa = ofw_translate(&trans);
  136.     void *bootinfo_pa = ofw_translate(&bootinfo);
  137.    
  138.     printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20);
  139.     printf(" %L: boot info structure (physical %L)\n", &bootinfo, bootinfo_pa);
  140.     printf(" %L: bootstrap trampoline (physical %L)\n", &real_mode, real_mode_pa);
  141.     printf(" %L: translation table (physical %L)\n", &trans, trans_pa);
  142.     for (i = 0; i < COMPONENTS; i++)
  143.         printf(" %L: %s image (size %d bytes)\n", components[i].start, components[i].name, components[i].size);
  144.    
  145.     unsigned int top = 0;
  146.     for (i = 0; i < COMPONENTS; i++)
  147.         top += ALIGN_UP(components[i].size, PAGE_SIZE);
  148.    
  149.     unsigned int pages = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE) >> PAGE_WIDTH;
  150.    
  151.     for (i = 0; i < pages; i++) {
  152.         void *pa = ofw_translate(KERNEL_START + (i << PAGE_WIDTH));
  153.         fix_overlap(KERNEL_START + (i << PAGE_WIDTH), &pa, "kernel", &top);
  154.         trans[i] = pa;
  155.     }
  156.    
  157.     bootinfo.taskmap.count = 0;
  158.     for (i = 1; i < COMPONENTS; i++) {
  159.         unsigned int component_pages = ALIGN_UP(components[i].size, PAGE_SIZE) >> PAGE_WIDTH;
  160.         unsigned int j;
  161.        
  162.         for (j = 0; j < component_pages; j++) {
  163.             void *pa = ofw_translate(components[i].start + (j << PAGE_WIDTH));
  164.             fix_overlap(components[i].start + (j << PAGE_WIDTH), &pa, components[i].name, &top);
  165.             trans[pages + j] = pa;
  166.             if (j == 0) {
  167.                 bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr = (void *) (pages << PAGE_WIDTH);
  168.                 bootinfo.taskmap.tasks[bootinfo.taskmap.count].size = components[i].size;
  169.                 bootinfo.taskmap.count++;
  170.             }
  171.         }
  172.        
  173.         pages += component_pages;
  174.     }
  175.    
  176.     fix_overlap(&real_mode, &real_mode_pa, "bootstrap trampoline", &top);
  177.     fix_overlap(&trans, &trans_pa, "translation table", &top);
  178.     fix_overlap(&bootinfo, &bootinfo_pa, "boot info", &top);
  179.    
  180.     ofw_setup_palette();
  181.    
  182.     printf("\nBooting the kernel...\n");
  183.     jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, pages << PAGE_WIDTH, real_mode_pa, (void *) bootinfo.screen.addr, bootinfo.screen.scanline);
  184. }
  185.