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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 <mm/frame.h>
  51. #include <mm/page.h>
  52. #include <mm/tlb.h>
  53. #include <synch/waitq.h>
  54.  
  55. #include <arch.h>
  56. #include <arch/faddr.h>
  57.  
  58. #include <typedefs.h>
  59.  
  60. char *project = "SPARTAN kernel";
  61. char *copyright = "Copyright (C) 2001-2005 Jakub Jermar\nCopyright (C) 2005 HelenOS project";
  62.  
  63. config_t config;
  64. context_t ctx;
  65.  
  66. /*
  67.  * These 'hardcoded' variables will be intialised by
  68.  * the linker or the low level assembler code with
  69.  * appropriate sizes and addresses.
  70.  */
  71. __address hardcoded_load_address = 0;
  72. size_t hardcoded_ktext_size = 0;
  73. size_t hardcoded_kdata_size = 0;
  74.  
  75. void main_bsp(void);
  76. void main_ap(void);
  77.  
  78. /*
  79.  * These two functions prevent stack from underflowing during the
  80.  * kernel boot phase when SP is set to the very top of the reserved
  81.  * space. The stack could get corrupted by a fooled compiler-generated
  82.  * pop sequence otherwise.
  83.  */
  84. static void main_bsp_separated_stack(void);
  85. static void main_ap_separated_stack(void);
  86.  
  87.  
  88. /** Bootstrap CPU main kernel routine
  89.  *
  90.  * Initializes the kernel by bootstrap CPU.
  91.  *
  92.  * Assuming cpu_priority_high().
  93.  *
  94.  */
  95. void main_bsp(void)
  96. {
  97.     config.cpu_count = 1;
  98.     config.cpu_active = 1;
  99.  
  100.     config.base = hardcoded_load_address;
  101.     config.memory_size = CONFIG_MEMORY_SIZE;
  102.     config.kernel_size = hardcoded_ktext_size + hardcoded_kdata_size + CONFIG_HEAP_SIZE + CONFIG_STACK_SIZE;
  103.  
  104.     context_save(&ctx);
  105.     context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + hardcoded_ktext_size + hardcoded_kdata_size + CONFIG_HEAP_SIZE, CONFIG_STACK_SIZE);
  106.     context_restore(&ctx);
  107.     /* not reached */
  108. }
  109.  
  110.  
  111. /** Bootstrap CPU main kernel routine stack wrapper
  112.  *
  113.  * Second part of main_bsp().
  114.  *
  115.  */
  116. void main_bsp_separated_stack(void) {
  117.     vm_t *m;
  118.     task_t *k;
  119.     thread_t *t;
  120.  
  121.     arch_pre_mm_init();
  122.  
  123.     heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_HEAP_SIZE);
  124.     frame_init();
  125.     page_init();
  126.     tlb_init();
  127.  
  128.     arch_post_mm_init();
  129.  
  130.     printf("%s\n%s\n", project, copyright);
  131.     printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
  132.         config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
  133.  
  134.     arch_late_init();
  135.    
  136.     smp_init();
  137.     printf("config.cpu_count=%d\n", config.cpu_count);
  138.  
  139.     cpu_init();
  140.     calibrate_delay_loop();
  141.  
  142.     timeout_init();
  143.     scheduler_init();
  144.     task_init();
  145.     thread_init();
  146.  
  147.     /*
  148.      * Create kernel vm mapping.
  149.      */
  150.     m = vm_create();
  151.     if (!m) panic("can't create kernel vm address space\n");
  152.  
  153.     /*
  154.      * Create kernel task.
  155.      */
  156.     k = task_create(m);
  157.     if (!k) panic("can't create kernel task\n");
  158.  
  159.     /*
  160.      * Create the first thread.
  161.      */
  162.     t = thread_create(kinit, NULL, k, 0);
  163.     if (!t) panic("can't create kinit thread\n");
  164.  
  165.     thread_ready(t);
  166.  
  167.     /*
  168.      * This call to scheduler() will return to kinit,
  169.      * starting the thread of kernel threads.
  170.      */
  171.     scheduler();
  172.     /* not reached */
  173. }
  174.  
  175.  
  176. #ifdef __SMP__
  177. /** Application CPUs main kernel routine
  178.  *
  179.  * Executed by application processors, temporary stack
  180.  * is at ctx.sp which was set during BP boot.
  181.  *
  182.  * Assuming  cpu_priority_high().
  183.  *
  184.  */
  185. void main_ap(void)
  186. {
  187.     /*
  188.      * Incrementing the active CPU counter will guarantee that the
  189.      * pm_init() will not attempt to build GDT and IDT tables again.
  190.      * Neither frame_init() will do the complete thing. Neither cpu_init()
  191.      * will do.
  192.      */
  193.     config.cpu_active++;
  194.  
  195.     arch_pre_mm_init();
  196.     frame_init();
  197.     page_init();
  198.     arch_post_mm_init();
  199.  
  200.     cpu_init();
  201.     calibrate_delay_loop();
  202.  
  203.     l_apic_init();
  204.     l_apic_debug();
  205.  
  206.  
  207.     /*
  208.      * If we woke kmp up before we left the kernel stack, we could
  209.      * collide with another CPU coming up. To prevent this, we
  210.      * switch to this cpu's private stack prior to waking kmp up.
  211.      */
  212.     context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), CPU->stack, CPU_STACK_SIZE);
  213.     context_restore(&CPU->saved_context);
  214.     /* not reached */
  215. }
  216.  
  217.  
  218. /** Application CPUs main kernel routine stack wrapper
  219.  *
  220.  * Second part of main_ap().
  221.  *
  222.  */
  223. void main_ap_separated_stack(void)
  224. {
  225.     /*
  226.      * Configure timeouts for this cpu.
  227.      */
  228.     timeout_init();
  229.  
  230.     waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
  231.     scheduler();
  232.     /* not reached */
  233. }
  234. #endif /* __SMP__*/
  235.