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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. /* the lowest ID (read from the VER register) of some US3 CPU model */
  71. #define FIRST_US3_CPU 0x14
  72.  
  73. /* the greatest ID (read from the VER register) of some US3 CPU model */
  74. #define LAST_US3_CPU 0x19
  75.  
  76. /**
  77.  * Sets the global variable "subarchitecture" to the correct value.
  78.  */
  79. static void detect_subarchitecture(void)
  80. {
  81.     uint64_t v;
  82.     asm volatile ("rdpr %%ver, %0\n" : "=r" (v));
  83.    
  84.     v = (v << 16) >> 48;
  85.     if ((v >= FIRST_US3_CPU) && (v <= LAST_US3_CPU)) {
  86.         subarchitecture = SUBARCH_US3;
  87.     } else if (v < FIRST_US3_CPU) {
  88.         subarchitecture = SUBARCH_US;
  89.     }
  90. }
  91.  
  92. void bootstrap(void)
  93. {
  94.     void *base = (void *) KERNEL_VIRTUAL_ADDRESS;
  95.     void *balloc_base;
  96.     unsigned int top = 0;
  97.     int i, j;
  98.  
  99.     version_print();
  100.    
  101.     detect_subarchitecture();
  102.     init_components(components);
  103.  
  104.     if (!ofw_get_physmem_start(&bootinfo.physmem_start)) {
  105.         printf("Error: unable to get start of physical memory.\n");
  106.         halt();
  107.     }
  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.     /*
  120.      * SILO for some reason adds 0x400000 and subtracts
  121.      * bootinfo.physmem_start to/from silo_ramdisk_image.
  122.      * We just need plain physical address so we fix it up.
  123.      */
  124.     if (silo_ramdisk_image) {
  125.         silo_ramdisk_image += bootinfo.physmem_start;
  126.         silo_ramdisk_image -= 0x400000;
  127.         /* Install 1:1 mapping for the ramdisk. */
  128.         if (ofw_map((void *)((uintptr_t)silo_ramdisk_image),
  129.             (void *)((uintptr_t)silo_ramdisk_image),
  130.             silo_ramdisk_size, -1) != 0) {
  131.             printf("Failed to map ramdisk.\n");
  132.             halt();
  133.         }
  134.     }
  135.    
  136.     printf("\nSystem info\n");
  137.     printf(" memory: %dM starting at %P\n",
  138.         bootinfo.memmap.total >> 20, bootinfo.physmem_start);
  139.  
  140.     printf("\nMemory statistics\n");
  141.     printf(" kernel entry point at %P\n", KERNEL_VIRTUAL_ADDRESS);
  142.     printf(" %P: boot info structure\n", &bootinfo);
  143.    
  144.     /*
  145.      * Figure out destination address for each component.
  146.      * In this phase, we don't copy the components yet because we want to
  147.      * to be careful not to overwrite anything, especially the components
  148.      * which haven't been copied yet.
  149.      */
  150.     bootinfo.taskmap.count = 0;
  151.     for (i = 0; i < COMPONENTS; i++) {
  152.         printf(" %P: %s image (size %d bytes)\n", components[i].start,
  153.             components[i].name, components[i].size);
  154.         top = ALIGN_UP(top, PAGE_SIZE);
  155.         if (i > 0) {
  156.             if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  157.                 printf("Skipping superfluous components.\n");
  158.                 break;
  159.             }
  160.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  161.                 base + top;
  162.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  163.                 components[i].size;
  164.             bootinfo.taskmap.count++;
  165.         }
  166.         top += components[i].size;
  167.     }
  168.  
  169.     j = bootinfo.taskmap.count - 1; /* do not consider ramdisk */
  170.  
  171.     if (silo_ramdisk_image) {
  172.         /* Treat the ramdisk as the last bootinfo task. */
  173.         if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  174.             printf("Skipping ramdisk.\n");
  175.             goto skip_ramdisk;
  176.         }
  177.         top = ALIGN_UP(top, PAGE_SIZE);
  178.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  179.             base + top;
  180.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  181.             silo_ramdisk_size;
  182.         bootinfo.taskmap.count++;
  183.         printf("\nCopying ramdisk...");
  184.         /*
  185.          * Claim and map the whole ramdisk as it may exceed the area
  186.          * given to us by SILO.
  187.          */
  188.         (void) ofw_claim_phys(base + top, silo_ramdisk_size);
  189.         (void) ofw_map(base + top, base + top, silo_ramdisk_size, -1);
  190.         memmove(base + top, (void *)((uintptr_t)silo_ramdisk_image),
  191.             silo_ramdisk_size);
  192.         printf("done.\n");
  193.         top += silo_ramdisk_size;
  194.     }
  195. skip_ramdisk:
  196.  
  197.     /*
  198.      * Now we can proceed to copy the components. We do it in reverse order
  199.      * so that we don't overwrite anything even if the components overlap
  200.      * with base.
  201.      */
  202.     printf("\nCopying bootinfo tasks\n");
  203.     for (i = COMPONENTS - 1; i > 0; i--, j--) {
  204.         printf(" %s...", components[i].name);
  205.  
  206.         /*
  207.          * At this point, we claim the physical memory that we are
  208.          * going to use. We should be safe in case of the virtual
  209.          * address space because the OpenFirmware, according to its
  210.          * SPARC binding, should restrict its use of virtual memory
  211.          * to addresses from [0xffd00000; 0xffefffff] and
  212.          * [0xfe000000; 0xfeffffff].
  213.          *
  214.          * XXX We don't map this piece of memory. We simply rely on
  215.          *     SILO to have it done for us already in this case.
  216.          */
  217.         (void) ofw_claim_phys(bootinfo.physmem_start +
  218.             bootinfo.taskmap.tasks[j].addr,
  219.             ALIGN_UP(components[i].size, PAGE_SIZE));
  220.            
  221.         memcpy((void *)bootinfo.taskmap.tasks[j].addr,
  222.             components[i].start, components[i].size);
  223.         printf("done.\n");
  224.     }
  225.  
  226.     printf("\nCopying kernel...");
  227.     (void) ofw_claim_phys(bootinfo.physmem_start + base,
  228.         ALIGN_UP(components[0].size, PAGE_SIZE));
  229.     memcpy(base, components[0].start, components[0].size);
  230.     printf("done.\n");
  231.  
  232.     /*
  233.      * Claim and map the physical memory for the boot allocator.
  234.      * Initialize the boot allocator.
  235.      */
  236.     balloc_base = base + ALIGN_UP(top, PAGE_SIZE);
  237.     (void) ofw_claim_phys(bootinfo.physmem_start + balloc_base,
  238.         BALLOC_MAX_SIZE);
  239.     (void) ofw_map(balloc_base, balloc_base, BALLOC_MAX_SIZE, -1);
  240.     balloc_init(&bootinfo.ballocs, (uintptr_t)balloc_base);
  241.  
  242.     printf("\nCanonizing OpenFirmware device tree...");
  243.     bootinfo.ofw_root = ofw_tree_build();
  244.     printf("done.\n");
  245.  
  246. #ifdef CONFIG_SMP
  247.     printf("\nChecking for secondary processors...");
  248.     if (!ofw_cpu())
  249.         printf("Error: unable to get CPU properties\n");
  250.     printf("done.\n");
  251. #endif
  252.  
  253.     printf("\nBooting the kernel...\n");
  254.     jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS,
  255.         bootinfo.physmem_start | BSP_PROCESSOR, &bootinfo,
  256.         sizeof(bootinfo));
  257. }
  258.  
  259.