Subversion Repositories HelenOS

Rev

Rev 2927 | Rev 3674 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (c) 2005 Martin Decky
  3.  * Copyright (c) 2006 Jakub Jermar
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. #include "main.h"
  31. #include <printf.h>
  32. #include "asm.h"
  33. #include "_components.h"
  34. #include <balloc.h>
  35. #include <ofw.h>
  36. #include <ofw_tree.h>
  37. #include "ofwarch.h"
  38. #include <align.h>
  39.  
  40. bootinfo_t bootinfo;
  41. component_t components[COMPONENTS];
  42.  
  43. char *release = RELEASE;
  44.  
  45. #ifdef REVISION
  46.     char *revision = ", revision " REVISION;
  47. #else
  48.     char *revision = "";
  49. #endif
  50.  
  51. #ifdef TIMESTAMP
  52.     char *timestamp = "\nBuilt on " TIMESTAMP;
  53. #else
  54.     char *timestamp = "";
  55. #endif
  56.  
  57. /** Print version information. */
  58. static void version_print(void)
  59. {
  60.     printf("HelenOS SPARC64 Bootloader\nRelease %s%s%s\n"
  61.         "Copyright (c) 2006 HelenOS project\n",
  62.         release, revision, timestamp);
  63. }
  64.  
  65. void bootstrap(void)
  66. {
  67.     void *base = (void *) KERNEL_VIRTUAL_ADDRESS;
  68.     void *balloc_base;
  69.     unsigned int top = 0;
  70.     int i, j;
  71.  
  72.     version_print();
  73.    
  74.     init_components(components);
  75.  
  76.     if (!ofw_get_physmem_start(&bootinfo.physmem_start)) {
  77.         printf("Error: unable to get start of physical memory.\n");
  78.         halt();
  79.     }
  80.  
  81.     if (!ofw_memmap(&bootinfo.memmap)) {
  82.         printf("Error: unable to get memory map, halting.\n");
  83.         halt();
  84.     }
  85.    
  86.     if (bootinfo.memmap.total == 0) {
  87.         printf("Error: no memory detected, halting.\n");
  88.         halt();
  89.     }
  90.  
  91.     /*
  92.      * SILO for some reason adds 0x400000 and subtracts
  93.      * bootinfo.physmem_start to/from silo_ramdisk_image.
  94.      * We just need plain physical address so we fix it up.
  95.      */
  96.     if (silo_ramdisk_image) {
  97.         silo_ramdisk_image += bootinfo.physmem_start;
  98.         silo_ramdisk_image -= 0x400000;
  99.         /* Install 1:1 mapping for the ramdisk. */
  100.         if (ofw_map((void *)((uintptr_t)silo_ramdisk_image),
  101.             (void *)((uintptr_t)silo_ramdisk_image),
  102.             silo_ramdisk_size, -1) != 0) {
  103.             printf("Failed to map ramdisk.\n");
  104.             halt();
  105.         }
  106.     }
  107.    
  108.     printf("\nSystem info\n");
  109.     printf(" memory: %dM starting at %P\n",
  110.         bootinfo.memmap.total >> 20, bootinfo.physmem_start);
  111.  
  112.     printf("\nMemory statistics\n");
  113.     printf(" kernel entry point at %P\n", KERNEL_VIRTUAL_ADDRESS);
  114.     printf(" %P: boot info structure\n", &bootinfo);
  115.    
  116.     /*
  117.      * Figure out destination address for each component.
  118.      * In this phase, we don't copy the components yet because we want to
  119.      * to be careful not to overwrite anything, especially the components
  120.      * which haven't been copied yet.
  121.      */
  122.     bootinfo.taskmap.count = 0;
  123.     for (i = 0; i < COMPONENTS; i++) {
  124.         printf(" %P: %s image (size %d bytes)\n", components[i].start,
  125.             components[i].name, components[i].size);
  126.         top = ALIGN_UP(top, PAGE_SIZE);
  127.         if (i > 0) {
  128.             if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  129.                 printf("Skipping superfluous components.\n");
  130.                 break;
  131.             }
  132.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  133.                 base + top;
  134.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  135.                 components[i].size;
  136.             bootinfo.taskmap.count++;
  137.         }
  138.         top += components[i].size;
  139.     }
  140.  
  141.     j = bootinfo.taskmap.count - 1; /* do not consider ramdisk */
  142.  
  143.     if (silo_ramdisk_image) {
  144.         /* Treat the ramdisk as the last bootinfo task. */
  145.         if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  146.             printf("Skipping ramdisk.\n");
  147.             goto skip_ramdisk;
  148.         }
  149.         top = ALIGN_UP(top, PAGE_SIZE);
  150.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  151.             base + top;
  152.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  153.             silo_ramdisk_size;
  154.         bootinfo.taskmap.count++;
  155.         printf("\nCopying ramdisk...");
  156.         /*
  157.          * Claim and map the whole ramdisk as it may exceed the area
  158.          * given to us by SILO.
  159.          */
  160.         (void) ofw_claim_phys(base + top, silo_ramdisk_size);
  161.         (void) ofw_map(base + top, base + top, silo_ramdisk_size, -1);
  162.         /*
  163.          * FIXME If the source and destination overlap, it may be
  164.          * desirable to copy in reverse order, depending on how the two
  165.          * regions overlap.
  166.          */
  167.         memcpy(base + top, (void *)((uintptr_t)silo_ramdisk_image),
  168.             silo_ramdisk_size);
  169.         printf("done.\n");
  170.         top += silo_ramdisk_size;
  171.     }
  172. skip_ramdisk:
  173.  
  174.     /*
  175.      * Now we can proceed to copy the components. We do it in reverse order
  176.      * so that we don't overwrite anything even if the components overlap
  177.      * with base.
  178.      */
  179.     printf("\nCopying bootinfo tasks\n");
  180.     for (i = COMPONENTS - 1; i > 0; i--, j--) {
  181.         printf(" %s...", components[i].name);
  182.  
  183.         /*
  184.          * At this point, we claim the physical memory that we are
  185.          * going to use. We should be safe in case of the virtual
  186.          * address space because the OpenFirmware, according to its
  187.          * SPARC binding, should restrict its use of virtual memory
  188.          * to addresses from [0xffd00000; 0xffefffff] and
  189.          * [0xfe000000; 0xfeffffff].
  190.          *
  191.          * XXX We don't map this piece of memory. We simply rely on
  192.          *     SILO to have it done for us already in this case.
  193.          */
  194.         (void) ofw_claim_phys(bootinfo.physmem_start +
  195.             bootinfo.taskmap.tasks[j].addr,
  196.             ALIGN_UP(components[i].size, PAGE_SIZE));
  197.            
  198.         memcpy((void *)bootinfo.taskmap.tasks[j].addr,
  199.             components[i].start, components[i].size);
  200.         printf("done.\n");
  201.     }
  202.  
  203.     printf("\nCopying kernel...");
  204.     (void) ofw_claim_phys(bootinfo.physmem_start + base,
  205.         ALIGN_UP(components[0].size, PAGE_SIZE));
  206.     memcpy(base, components[0].start, components[0].size);
  207.     printf("done.\n");
  208.  
  209.     /*
  210.      * Claim and map the physical memory for the boot allocator.
  211.      * Initialize the boot allocator.
  212.      */
  213.     balloc_base = base + ALIGN_UP(top, PAGE_SIZE);
  214.     (void) ofw_claim_phys(bootinfo.physmem_start + balloc_base,
  215.         BALLOC_MAX_SIZE);
  216.     (void) ofw_map(balloc_base, balloc_base, BALLOC_MAX_SIZE, -1);
  217.     balloc_init(&bootinfo.ballocs, (uintptr_t)balloc_base);
  218.  
  219.     printf("\nCanonizing OpenFirmware device tree...");
  220.     bootinfo.ofw_root = ofw_tree_build();
  221.     printf("done.\n");
  222.  
  223. #ifdef CONFIG_SMP
  224.     printf("\nChecking for secondary processors...");
  225.     if (!ofw_cpu())
  226.         printf("Error: unable to get CPU properties\n");
  227.     printf("done.\n");
  228. #endif
  229.  
  230.     printf("\nBooting the kernel...\n");
  231.     jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS,
  232.         bootinfo.physmem_start | BSP_PROCESSOR, &bootinfo,
  233.         sizeof(bootinfo));
  234. }
  235.  
  236.