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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.  
  43. /** UltraSPARC subarchitecture - 1 for US, 3 for US3 */
  44. uint8_t subarchitecture;
  45.  
  46. component_t components[COMPONENTS];
  47.  
  48. char *release = RELEASE;
  49.  
  50. #ifdef REVISION
  51.     char *revision = ", revision " REVISION;
  52. #else
  53.     char *revision = "";
  54. #endif
  55.  
  56. #ifdef TIMESTAMP
  57.     char *timestamp = "\nBuilt on " TIMESTAMP;
  58. #else
  59.     char *timestamp = "";
  60. #endif
  61.  
  62. /** Print version information. */
  63. static void version_print(void)
  64. {
  65.     printf("HelenOS SPARC64 Bootloader\nRelease %s%s%s\n"
  66.         "Copyright (c) 2006 HelenOS project\n",
  67.         release, revision, timestamp);
  68. }
  69.  
  70. #define FIRST_US3_CPU 0x14
  71. #define LAST_US3_CPU 0x19
  72. static void detect_subarchitecture(void)
  73. {
  74.     uint64_t v;
  75.     asm volatile ("rdpr %%ver, %0\n" : "=r" (v));
  76.    
  77.     v = (v << 16) >> 48;
  78.     if ((v >= FIRST_US3_CPU) && (v <= LAST_US3_CPU)) {
  79.         subarchitecture = SUBARCH_US3;
  80.     } else if (v < FIRST_US3_CPU) {
  81.         subarchitecture = SUBARCH_US;
  82.     }
  83. }
  84.  
  85. void bootstrap(void)
  86. {
  87.     void *base = (void *) KERNEL_VIRTUAL_ADDRESS;
  88.     void *balloc_base;
  89.     unsigned int top = 0;
  90.     int i, j;
  91.  
  92.     version_print();
  93.    
  94.     detect_subarchitecture();
  95.     init_components(components);
  96.  
  97.     if (!ofw_get_physmem_start(&bootinfo.physmem_start)) {
  98.         printf("Error: unable to get start of physical memory.\n");
  99.         halt();
  100.     }
  101.  
  102.     if (!ofw_memmap(&bootinfo.memmap)) {
  103.         printf("Error: unable to get memory map, halting.\n");
  104.         halt();
  105.     }
  106.  
  107.     if (bootinfo.memmap.total == 0) {
  108.         printf("Error: no memory detected, halting.\n");
  109.         halt();
  110.     }
  111.  
  112.     /*
  113.      * SILO for some reason adds 0x400000 and subtracts
  114.      * bootinfo.physmem_start to/from silo_ramdisk_image.
  115.      * We just need plain physical address so we fix it up.
  116.      */
  117.     if (silo_ramdisk_image) {
  118.         silo_ramdisk_image += bootinfo.physmem_start;
  119.         silo_ramdisk_image -= 0x400000;
  120.         /* Install 1:1 mapping for the ramdisk. */
  121.         if (ofw_map((void *)((uintptr_t)silo_ramdisk_image),
  122.             (void *)((uintptr_t)silo_ramdisk_image),
  123.             silo_ramdisk_size, -1) != 0) {
  124.             printf("Failed to map ramdisk.\n");
  125.             halt();
  126.         }
  127.     }
  128.    
  129.     printf("\nSystem info\n");
  130.     printf(" memory: %dM starting at %P\n",
  131.         bootinfo.memmap.total >> 20, bootinfo.physmem_start);
  132.  
  133.     printf("\nMemory statistics\n");
  134.     printf(" kernel entry point at %P\n", KERNEL_VIRTUAL_ADDRESS);
  135.     printf(" %P: boot info structure\n", &bootinfo);
  136.    
  137.     /*
  138.      * Figure out destination address for each component.
  139.      * In this phase, we don't copy the components yet because we want to
  140.      * to be careful not to overwrite anything, especially the components
  141.      * which haven't been copied yet.
  142.      */
  143.     bootinfo.taskmap.count = 0;
  144.     for (i = 0; i < COMPONENTS; i++) {
  145.         printf(" %P: %s image (size %d bytes)\n", components[i].start,
  146.             components[i].name, components[i].size);
  147.         top = ALIGN_UP(top, PAGE_SIZE);
  148.         if (i > 0) {
  149.             if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  150.                 printf("Skipping superfluous components.\n");
  151.                 break;
  152.             }
  153.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  154.                 base + top;
  155.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  156.                 components[i].size;
  157.             bootinfo.taskmap.count++;
  158.         }
  159.         top += components[i].size;
  160.     }
  161.  
  162.     j = bootinfo.taskmap.count - 1; /* do not consider ramdisk */
  163.  
  164.     if (silo_ramdisk_image) {
  165.         /* Treat the ramdisk as the last bootinfo task. */
  166.         if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  167.             printf("Skipping ramdisk.\n");
  168.             goto skip_ramdisk;
  169.         }
  170.         top = ALIGN_UP(top, PAGE_SIZE);
  171.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  172.             base + top;
  173.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  174.             silo_ramdisk_size;
  175.         bootinfo.taskmap.count++;
  176.         printf("\nCopying ramdisk...");
  177.         /*
  178.          * Claim and map the whole ramdisk as it may exceed the area
  179.          * given to us by SILO.
  180.          */
  181.         (void) ofw_claim_phys(base + top, silo_ramdisk_size);
  182.         (void) ofw_map(base + top, base + top, silo_ramdisk_size, -1);
  183.         memmove(base + top, (void *)((uintptr_t)silo_ramdisk_image),
  184.             silo_ramdisk_size);
  185.         printf("done.\n");
  186.         top += silo_ramdisk_size;
  187.     }
  188. skip_ramdisk:
  189.  
  190.     /*
  191.      * Now we can proceed to copy the components. We do it in reverse order
  192.      * so that we don't overwrite anything even if the components overlap
  193.      * with base.
  194.      */
  195.     printf("\nCopying bootinfo tasks\n");
  196.     for (i = COMPONENTS - 1; i > 0; i--, j--) {
  197.         printf(" %s...", components[i].name);
  198.  
  199.         /*
  200.          * At this point, we claim the physical memory that we are
  201.          * going to use. We should be safe in case of the virtual
  202.          * address space because the OpenFirmware, according to its
  203.          * SPARC binding, should restrict its use of virtual memory
  204.          * to addresses from [0xffd00000; 0xffefffff] and
  205.          * [0xfe000000; 0xfeffffff].
  206.          *
  207.          * XXX We don't map this piece of memory. We simply rely on
  208.          *     SILO to have it done for us already in this case.
  209.          */
  210.         (void) ofw_claim_phys(bootinfo.physmem_start +
  211.             bootinfo.taskmap.tasks[j].addr,
  212.             ALIGN_UP(components[i].size, PAGE_SIZE));
  213.            
  214.         memcpy((void *)bootinfo.taskmap.tasks[j].addr,
  215.             components[i].start, components[i].size);
  216.         printf("done.\n");
  217.     }
  218.  
  219.     printf("\nCopying kernel...");
  220.     (void) ofw_claim_phys(bootinfo.physmem_start + base,
  221.         ALIGN_UP(components[0].size, PAGE_SIZE));
  222.     memcpy(base, components[0].start, components[0].size);
  223.     printf("done.\n");
  224.  
  225.     /*
  226.      * Claim and map the physical memory for the boot allocator.
  227.      * Initialize the boot allocator.
  228.      */
  229.     balloc_base = base + ALIGN_UP(top, PAGE_SIZE);
  230.     (void) ofw_claim_phys(bootinfo.physmem_start + balloc_base,
  231.         BALLOC_MAX_SIZE);
  232.     (void) ofw_map(balloc_base, balloc_base, BALLOC_MAX_SIZE, -1);
  233.     balloc_init(&bootinfo.ballocs, (uintptr_t)balloc_base);
  234.  
  235.     printf("\nCanonizing OpenFirmware device tree...");
  236.     bootinfo.ofw_root = ofw_tree_build();
  237.     printf("done.\n");
  238.  
  239. #ifdef CONFIG_SMP
  240.     printf("\nChecking for secondary processors...");
  241.     if (!ofw_cpu())
  242.         printf("Error: unable to get CPU properties\n");
  243.     printf("done.\n");
  244. #endif
  245.  
  246.     printf("\nBooting the kernel...\n");
  247.     jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS,
  248.         bootinfo.physmem_start | BSP_PROCESSOR, &bootinfo,
  249.         sizeof(bootinfo));
  250. }
  251.  
  252.