Subversion Repositories HelenOS

Rev

Rev 3808 | Rev 3883 | 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. #include <string.h>
  40.  
  41. bootinfo_t bootinfo;
  42.  
  43. component_t components[COMPONENTS];
  44.  
  45. char *release = RELEASE;
  46.  
  47. #ifdef REVISION
  48.     char *revision = ", revision " REVISION;
  49. #else
  50.     char *revision = "";
  51. #endif
  52.  
  53. #ifdef TIMESTAMP
  54.     char *timestamp = "\nBuilt on " TIMESTAMP;
  55. #else
  56.     char *timestamp = "";
  57. #endif
  58.  
  59. /** UltraSPARC subarchitecture - 1 for US, 3 for US3 */
  60. uint8_t subarchitecture;
  61.  
  62. /**
  63.  * mask of the MID field inside the ICBUS_CONFIG register shifted by
  64.  * MID_SHIFT bits to the right
  65.  */
  66. uint16_t mid_mask;
  67.  
  68. /** Print version information. */
  69. static void version_print(void)
  70. {
  71.     printf("HelenOS SPARC64 Bootloader\nRelease %s%s%s\n"
  72.         "Copyright (c) 2006 HelenOS project\n",
  73.         release, revision, timestamp);
  74. }
  75.  
  76. /* the lowest ID (read from the VER register) of some US3 CPU model */
  77. #define FIRST_US3_CPU   0x14
  78.  
  79. /* the greatest ID (read from the VER register) of some US3 CPU model */
  80. #define LAST_US3_CPU    0x19
  81.  
  82. /* UltraSPARC IIIi processor implementation code */
  83. #define US_IIIi_CODE    0x15
  84.  
  85. /**
  86.  * Sets the global variables "subarchitecture" and "mid_mask" to
  87.  * correct values.
  88.  */
  89. static void detect_subarchitecture(void)
  90. {
  91.     uint64_t v;
  92.     asm volatile ("rdpr %%ver, %0\n" : "=r" (v));
  93.    
  94.     v = (v << 16) >> 48;
  95.     if ((v >= FIRST_US3_CPU) && (v <= LAST_US3_CPU)) {
  96.         subarchitecture = SUBARCH_US3;
  97.         if (v == US_IIIi_CODE)
  98.             mid_mask = (1 << 5) - 1;
  99.         else
  100.             mid_mask = (1 << 10) - 1;
  101.     } else if (v < FIRST_US3_CPU) {
  102.         subarchitecture = SUBARCH_US;
  103.         mid_mask = (1 << 5) - 1;
  104.     } else {
  105.         printf("\nThis CPU is not supported by HelenOS.");
  106.     }
  107. }
  108.  
  109. void bootstrap(void)
  110. {
  111.     void *base = (void *) KERNEL_VIRTUAL_ADDRESS;
  112.     void *balloc_base;
  113.     unsigned int top = 0;
  114.     int i, j;
  115.  
  116.     version_print();
  117.    
  118.     detect_subarchitecture();
  119.     init_components(components);
  120.  
  121.     if (!ofw_get_physmem_start(&bootinfo.physmem_start)) {
  122.         printf("Error: unable to get start of physical memory.\n");
  123.         halt();
  124.     }
  125.  
  126.     if (!ofw_memmap(&bootinfo.memmap)) {
  127.         printf("Error: unable to get memory map, halting.\n");
  128.         halt();
  129.     }
  130.  
  131.     if (bootinfo.memmap.total == 0) {
  132.         printf("Error: no memory detected, halting.\n");
  133.         halt();
  134.     }
  135.  
  136.     /*
  137.      * SILO for some reason adds 0x400000 and subtracts
  138.      * bootinfo.physmem_start to/from silo_ramdisk_image.
  139.      * We just need plain physical address so we fix it up.
  140.      */
  141.     if (silo_ramdisk_image) {
  142.         silo_ramdisk_image += bootinfo.physmem_start;
  143.         silo_ramdisk_image -= 0x400000;
  144.         /* Install 1:1 mapping for the ramdisk. */
  145.         if (ofw_map((void *)((uintptr_t) silo_ramdisk_image),
  146.             (void *)((uintptr_t) silo_ramdisk_image),
  147.             silo_ramdisk_size, -1) != 0) {
  148.             printf("Failed to map ramdisk.\n");
  149.             halt();
  150.         }
  151.     }
  152.    
  153.     printf("\nSystem info\n");
  154.     printf(" memory: %dM starting at %P\n",
  155.         bootinfo.memmap.total >> 20, bootinfo.physmem_start);
  156.  
  157.     printf("\nMemory statistics\n");
  158.     printf(" kernel entry point at %P\n", KERNEL_VIRTUAL_ADDRESS);
  159.     printf(" %P: boot info structure\n", &bootinfo);
  160.    
  161.     /*
  162.      * Figure out destination address for each component.
  163.      * In this phase, we don't copy the components yet because we want to
  164.      * to be careful not to overwrite anything, especially the components
  165.      * which haven't been copied yet.
  166.      */
  167.     bootinfo.taskmap.count = 0;
  168.     for (i = 0; i < COMPONENTS; i++) {
  169.         printf(" %P: %s image (size %d bytes)\n", components[i].start,
  170.             components[i].name, components[i].size);
  171.         top = ALIGN_UP(top, PAGE_SIZE);
  172.         if (i > 0) {
  173.             if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  174.                 printf("Skipping superfluous components.\n");
  175.                 break;
  176.             }
  177.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  178.                 base + top;
  179.             bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  180.                 components[i].size;
  181.             bootinfo.taskmap.count++;
  182.         }
  183.         top += components[i].size;
  184.     }
  185.  
  186.     j = bootinfo.taskmap.count - 1; /* do not consider ramdisk */
  187.  
  188.     if (silo_ramdisk_image) {
  189.         /* Treat the ramdisk as the last bootinfo task. */
  190.         if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
  191.             printf("Skipping ramdisk.\n");
  192.             goto skip_ramdisk;
  193.         }
  194.         top = ALIGN_UP(top, PAGE_SIZE);
  195.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
  196.             base + top;
  197.         bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
  198.             silo_ramdisk_size;
  199.         bootinfo.taskmap.count++;
  200.         printf("\nCopying ramdisk...");
  201.         /*
  202.          * Claim and map the whole ramdisk as it may exceed the area
  203.          * given to us by SILO.
  204.          */
  205.         (void) ofw_claim_phys(base + top, silo_ramdisk_size);
  206.         (void) ofw_map(bootinfo.physmem_start + base + top, base + top,
  207.             silo_ramdisk_size, -1);
  208.         memmove(base + top, (void *)((uintptr_t)silo_ramdisk_image),
  209.             silo_ramdisk_size);
  210.         printf("done.\n");
  211.         top += silo_ramdisk_size;
  212.     }
  213. skip_ramdisk:
  214.  
  215.     /*
  216.      * Now we can proceed to copy the components. We do it in reverse order
  217.      * so that we don't overwrite anything even if the components overlap
  218.      * with base.
  219.      */
  220.     printf("\nCopying bootinfo tasks\n");
  221.     for (i = COMPONENTS - 1; i > 0; i--, j--) {
  222.         printf(" %s...", components[i].name);
  223.  
  224.         /*
  225.          * At this point, we claim the physical memory that we are
  226.          * going to use. We should be safe in case of the virtual
  227.          * address space because the OpenFirmware, according to its
  228.          * SPARC binding, should restrict its use of virtual memory
  229.          * to addresses from [0xffd00000; 0xffefffff] and
  230.          * [0xfe000000; 0xfeffffff].
  231.          *
  232.          * XXX We don't map this piece of memory. We simply rely on
  233.          *     SILO to have it done for us already in this case.
  234.          */
  235.         (void) ofw_claim_phys(bootinfo.physmem_start +
  236.             bootinfo.taskmap.tasks[j].addr,
  237.             ALIGN_UP(components[i].size, PAGE_SIZE));
  238.            
  239.         memcpy((void *)bootinfo.taskmap.tasks[j].addr,
  240.             components[i].start, components[i].size);
  241.         printf("done.\n");
  242.     }
  243.  
  244.     printf("\nCopying kernel...");
  245.     (void) ofw_claim_phys(bootinfo.physmem_start + base,
  246.         ALIGN_UP(components[0].size, PAGE_SIZE));
  247.     memcpy(base, components[0].start, components[0].size);
  248.     printf("done.\n");
  249.  
  250.     /*
  251.      * Claim and map the physical memory for the boot allocator.
  252.      * Initialize the boot allocator.
  253.      */
  254.     balloc_base = base + ALIGN_UP(top, PAGE_SIZE);
  255.     (void) ofw_claim_phys(bootinfo.physmem_start + balloc_base,
  256.         BALLOC_MAX_SIZE);
  257.     (void) ofw_map(bootinfo.physmem_start + balloc_base, balloc_base,
  258.         BALLOC_MAX_SIZE, -1);
  259.     balloc_init(&bootinfo.ballocs, (uintptr_t)balloc_base);
  260.  
  261.     printf("\nCanonizing OpenFirmware device tree...");
  262.     bootinfo.ofw_root = ofw_tree_build();
  263.     printf("done.\n");
  264.  
  265. #ifdef CONFIG_AP
  266.     printf("\nChecking for secondary processors...");
  267.     if (!ofw_cpu())
  268.         printf("Error: unable to get CPU properties\n");
  269.     printf("done.\n");
  270. #endif
  271.  
  272.     setup_palette();
  273.  
  274.     printf("\nBooting the kernel...\n");
  275.     jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS,
  276.         bootinfo.physmem_start | BSP_PROCESSOR, &bootinfo,
  277.         sizeof(bootinfo));
  278. }
  279.