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