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  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. #include <string.h>
  40.  
  41. bootinfo_t bootinfo;
  42. component_t components[COMPONENTS];
  43.  
  44. char *release = RELEASE;
  45.  
  46. #ifdef REVISION
  47.     char *revision = ", revision " REVISION;
  48. #else
  49.     char *revision = "";
  50. #endif
  51.  
  52. #ifdef TIMESTAMP
  53.     char *timestamp = "\nBuilt on " TIMESTAMP;
  54. #else
  55.     char *timestamp = "";
  56. #endif
  57.  
  58. /** Print version information. */
  59. static void version_print(void)
  60. {
  61.     printf("HelenOS SPARC64 Bootloader\nRelease %s%s%s\n"
  62.         "Copyright (c) 2006 HelenOS project\n",
  63.         release, revision, timestamp);
  64. }
  65.  
  66. void bootstrap(void)
  67. {
  68.     void *base = (void *) KERNEL_VIRTUAL_ADDRESS;
  69.     void *balloc_base;
  70.     unsigned int top = 0;
  71.     int i, j;
  72.  
  73.     version_print();
  74.    
  75.     init_components(components);
  76.  
  77.     if (!ofw_get_physmem_start(&bootinfo.physmem_start)) {
  78.         printf("Error: unable to get start of physical memory.\n");
  79.         halt();
  80.     }
  81.  
  82.     if (!ofw_memmap(&bootinfo.memmap)) {
  83.         printf("Error: unable to get memory map, halting.\n");
  84.         halt();
  85.     }
  86.    
  87.     if (bootinfo.memmap.total == 0) {
  88.         printf("Error: no memory detected, halting.\n");
  89.         halt();
  90.     }
  91.  
  92.     /*
  93.      * SILO for some reason adds 0x400000 and subtracts
  94.      * bootinfo.physmem_start to/from silo_ramdisk_image.
  95.      * We just need plain physical address so we fix it up.
  96.      */
  97.     if (silo_ramdisk_image) {
  98.         silo_ramdisk_image += bootinfo.physmem_start;
  99.         silo_ramdisk_image -= 0x400000;
  100.         /* Install 1:1 mapping for the ramdisk. */
  101.         if (ofw_map((void *)((uintptr_t)silo_ramdisk_image),
  102.             (void *)((uintptr_t)silo_ramdisk_image),
  103.             silo_ramdisk_size, -1) != 0) {
  104.             printf("Failed to map ramdisk.\n");
  105.             halt();
  106.         }
  107.     }
  108.    
  109.     printf("\nSystem info\n");
  110.     printf(" memory: %dM starting at %P\n",
  111.         bootinfo.memmap.total >> 20, bootinfo.physmem_start);
  112.  
  113.     printf("\nMemory statistics\n");
  114.     printf(" kernel entry point at %P\n", KERNEL_VIRTUAL_ADDRESS);
  115.     printf(" %P: boot info structure\n", &bootinfo);
  116.    
  117.     /*
  118.      * Figure out destination address for each component.
  119.      * In this phase, we don't copy the components yet because we want to
  120.      * to be careful not to overwrite anything, especially the components
  121.      * which haven't been copied yet.
  122.      */
  123.     bootinfo.taskmap.count = 0;
  124.     for (i = 0; i < COMPONENTS; i++) {
  125.         printf(" %P: %s image (size %d bytes)\n", components[i].start,
  126.             components[i].name, components[i].size);
  127.         top = ALIGN_UP(top, PAGE_SIZE);
  128.         if (i > 0) {
  129.             if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  130.                 printf("Skipping superfluous components.\n");
  131.                 break;
  132.             }
  133.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  134.                 base + top;
  135.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  136.                 components[i].size;
  137.             bootinfo.taskmap.count++;
  138.         }
  139.         top += components[i].size;
  140.     }
  141.  
  142.     j = bootinfo.taskmap.count - 1; /* do not consider ramdisk */
  143.  
  144.     if (silo_ramdisk_image) {
  145.         /* Treat the ramdisk as the last bootinfo task. */
  146.         if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  147.             printf("Skipping ramdisk.\n");
  148.             goto skip_ramdisk;
  149.         }
  150.         top = ALIGN_UP(top, PAGE_SIZE);
  151.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  152.             base + top;
  153.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  154.             silo_ramdisk_size;
  155.         bootinfo.taskmap.count++;
  156.         printf("\nCopying ramdisk...");
  157.         /*
  158.          * Claim and map the whole ramdisk as it may exceed the area
  159.          * given to us by SILO.
  160.          */
  161.         (void) ofw_claim_phys(base + top, silo_ramdisk_size);
  162.         (void) ofw_map(base + top, base + top, silo_ramdisk_size, -1);
  163.         memmove(base + top, (void *)((uintptr_t)silo_ramdisk_image),
  164.             silo_ramdisk_size);
  165.         printf("done.\n");
  166.         top += silo_ramdisk_size;
  167.     }
  168. skip_ramdisk:
  169.  
  170.     /*
  171.      * Now we can proceed to copy the components. We do it in reverse order
  172.      * so that we don't overwrite anything even if the components overlap
  173.      * with base.
  174.      */
  175.     printf("\nCopying bootinfo tasks\n");
  176.     for (i = COMPONENTS - 1; i > 0; i--, j--) {
  177.         printf(" %s...", components[i].name);
  178.  
  179.         /*
  180.          * At this point, we claim the physical memory that we are
  181.          * going to use. We should be safe in case of the virtual
  182.          * address space because the OpenFirmware, according to its
  183.          * SPARC binding, should restrict its use of virtual memory
  184.          * to addresses from [0xffd00000; 0xffefffff] and
  185.          * [0xfe000000; 0xfeffffff].
  186.          *
  187.          * XXX We don't map this piece of memory. We simply rely on
  188.          *     SILO to have it done for us already in this case.
  189.          */
  190.         (void) ofw_claim_phys(bootinfo.physmem_start +
  191.             bootinfo.taskmap.tasks[j].addr,
  192.             ALIGN_UP(components[i].size, PAGE_SIZE));
  193.            
  194.         memcpy((void *)bootinfo.taskmap.tasks[j].addr,
  195.             components[i].start, components[i].size);
  196.         printf("done.\n");
  197.     }
  198.  
  199.     printf("\nCopying kernel...");
  200.     (void) ofw_claim_phys(bootinfo.physmem_start + base,
  201.         ALIGN_UP(components[0].size, PAGE_SIZE));
  202.     memcpy(base, components[0].start, components[0].size);
  203.     printf("done.\n");
  204.  
  205.     /*
  206.      * Claim and map the physical memory for the boot allocator.
  207.      * Initialize the boot allocator.
  208.      */
  209.     balloc_base = base + ALIGN_UP(top, PAGE_SIZE);
  210.     (void) ofw_claim_phys(bootinfo.physmem_start + balloc_base,
  211.         BALLOC_MAX_SIZE);
  212.     (void) ofw_map(balloc_base, balloc_base, BALLOC_MAX_SIZE, -1);
  213.     balloc_init(&bootinfo.ballocs, (uintptr_t)balloc_base);
  214.  
  215.     printf("\nCanonizing OpenFirmware device tree...");
  216.     bootinfo.ofw_root = ofw_tree_build();
  217.     printf("done.\n");
  218.  
  219. #ifdef CONFIG_SMP
  220.     printf("\nChecking for secondary processors...");
  221.     if (!ofw_cpu())
  222.         printf("Error: unable to get CPU properties\n");
  223.     printf("done.\n");
  224. #endif
  225.  
  226.     printf("\nBooting the kernel...\n");
  227.     jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS,
  228.         bootinfo.physmem_start | BSP_PROCESSOR, &bootinfo,
  229.         sizeof(bootinfo));
  230. }
  231.  
  232.