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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <arch/asm.h>
  30. #include <context.h>
  31. #include <print.h>
  32. #include <panic.h>
  33. #include <config.h>
  34. #include <time/clock.h>
  35. #include <proc/scheduler.h>
  36. #include <proc/thread.h>
  37. #include <proc/task.h>
  38. #include <mm/vm.h>
  39. #include <main/kinit.h>
  40. #include <cpu.h>
  41. #include <mm/heap.h>
  42.  
  43. #ifdef __SMP__
  44. #include <arch/smp/apic.h>
  45. #include <arch/smp/mps.h>
  46. #endif /* __SMP__ */
  47.  
  48. #include <smp/smp.h>
  49.  
  50. #include <arch/mm/memory_init.h>
  51. #include <mm/frame.h>
  52. #include <mm/page.h>
  53. #include <mm/tlb.h>
  54. #include <synch/waitq.h>
  55.  
  56. #include <arch.h>
  57. #include <arch/faddr.h>
  58.  
  59. #include <typedefs.h>
  60.  
  61. char *project = "SPARTAN kernel";
  62. char *copyright = "Copyright (C) 2001-2005 Jakub Jermar\nCopyright (C) 2005 HelenOS project";
  63.  
  64. config_t config;
  65. context_t ctx;
  66.  
  67. /*
  68.  * These 'hardcoded' variables will be intialised by
  69.  * the linker or the low level assembler code with
  70.  * appropriate sizes and addresses.
  71.  */
  72. __address hardcoded_load_address = 0;
  73. size_t hardcoded_ktext_size = 0;
  74. size_t hardcoded_kdata_size = 0;
  75.  
  76. void main_bsp(void);
  77. void main_ap(void);
  78.  
  79. /*
  80.  * These two functions prevent stack from underflowing during the
  81.  * kernel boot phase when SP is set to the very top of the reserved
  82.  * space. The stack could get corrupted by a fooled compiler-generated
  83.  * pop sequence otherwise.
  84.  */
  85. static void main_bsp_separated_stack(void);
  86. static void main_ap_separated_stack(void);
  87.  
  88.  
  89. /** Bootstrap CPU main kernel routine
  90.  *
  91.  * Initializes the kernel by bootstrap CPU.
  92.  *
  93.  * Assuming cpu_priority_high().
  94.  *
  95.  */
  96. void main_bsp(void)
  97. {
  98.     config.cpu_count = 1;
  99.     config.cpu_active = 1;
  100.  
  101.     config.base = hardcoded_load_address;
  102.     config.memory_size = get_memory_size();
  103.     config.kernel_size = hardcoded_ktext_size + hardcoded_kdata_size + CONFIG_HEAP_SIZE + CONFIG_STACK_SIZE;
  104.  
  105.     context_save(&ctx);
  106.     context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + hardcoded_ktext_size + hardcoded_kdata_size + CONFIG_HEAP_SIZE, CONFIG_STACK_SIZE);
  107.     context_restore(&ctx);
  108.     /* not reached */
  109. }
  110.  
  111.  
  112. /** Bootstrap CPU main kernel routine stack wrapper
  113.  *
  114.  * Second part of main_bsp().
  115.  *
  116.  */
  117. void main_bsp_separated_stack(void) {
  118.     vm_t *m;
  119.     task_t *k;
  120.     thread_t *t;
  121.  
  122.     arch_pre_mm_init();
  123.  
  124.     heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_HEAP_SIZE);
  125.     frame_init();
  126.     page_init();
  127.     tlb_init();
  128.  
  129.     arch_post_mm_init();
  130.  
  131.     printf("%s\n%s\n", project, copyright);
  132.     printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
  133.         config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
  134.  
  135.     arch_late_init();
  136.    
  137.     smp_init();
  138.     printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
  139.     printf("config.cpu_count=%d\n", config.cpu_count);
  140.  
  141.     cpu_init();
  142.     calibrate_delay_loop();
  143.  
  144.     timeout_init();
  145.     scheduler_init();
  146.     task_init();
  147.     thread_init();
  148.  
  149.     /*
  150.      * Create kernel vm mapping.
  151.      */
  152.     m = vm_create();
  153.     if (!m) panic("can't create kernel vm address space\n");
  154.  
  155.     /*
  156.      * Create kernel task.
  157.      */
  158.     k = task_create(m);
  159.     if (!k) panic("can't create kernel task\n");
  160.  
  161.     /*
  162.      * Create the first thread.
  163.      */
  164.     t = thread_create(kinit, NULL, k, 0);
  165.     if (!t) panic("can't create kinit thread\n");
  166.  
  167.     thread_ready(t);
  168.  
  169.     /*
  170.      * This call to scheduler() will return to kinit,
  171.      * starting the thread of kernel threads.
  172.      */
  173.     scheduler();
  174.     /* not reached */
  175. }
  176.  
  177.  
  178. #ifdef __SMP__
  179. /** Application CPUs main kernel routine
  180.  *
  181.  * Executed by application processors, temporary stack
  182.  * is at ctx.sp which was set during BP boot.
  183.  *
  184.  * Assuming  cpu_priority_high().
  185.  *
  186.  */
  187. void main_ap(void)
  188. {
  189.     /*
  190.      * Incrementing the active CPU counter will guarantee that the
  191.      * pm_init() will not attempt to build GDT and IDT tables again.
  192.      * Neither frame_init() will do the complete thing. Neither cpu_init()
  193.      * will do.
  194.      */
  195.     config.cpu_active++;
  196.  
  197.     arch_pre_mm_init();
  198.     frame_init();
  199.     page_init();
  200.     arch_post_mm_init();
  201.  
  202.     cpu_init();
  203.     calibrate_delay_loop();
  204.  
  205.     l_apic_init();
  206.     l_apic_debug();
  207.  
  208.  
  209.     /*
  210.      * If we woke kmp up before we left the kernel stack, we could
  211.      * collide with another CPU coming up. To prevent this, we
  212.      * switch to this cpu's private stack prior to waking kmp up.
  213.      */
  214.     context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), CPU->stack, CPU_STACK_SIZE);
  215.     context_restore(&CPU->saved_context);
  216.     /* not reached */
  217. }
  218.  
  219.  
  220. /** Application CPUs main kernel routine stack wrapper
  221.  *
  222.  * Second part of main_ap().
  223.  *
  224.  */
  225. void main_ap_separated_stack(void)
  226. {
  227.     /*
  228.      * Configure timeouts for this cpu.
  229.      */
  230.     timeout_init();
  231.  
  232.     waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
  233.     scheduler();
  234.     /* not reached */
  235. }
  236. #endif /* __SMP__*/
  237.