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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 <main/kinit.h>
  39. #include <cpu.h>
  40. #include <align.h>
  41.  
  42. #ifdef CONFIG_SMP
  43. #include <arch/smp/apic.h>
  44. #include <arch/smp/mps.h>
  45. #endif /* CONFIG_SMP */
  46.  
  47. #include <smp/smp.h>
  48.  
  49. #include <arch/mm/memory_init.h>
  50. #include <mm/heap.h>
  51. #include <mm/frame.h>
  52. #include <mm/page.h>
  53. #include <mm/tlb.h>
  54. #include <mm/vm.h>
  55.  
  56. #include <synch/waitq.h>
  57.  
  58. #include <arch/arch.h>
  59. #include <arch.h>
  60. #include <arch/faddr.h>
  61.  
  62. #include <typedefs.h>
  63.  
  64. char *project = "SPARTAN kernel";
  65. char *release = RELEASE " (" NAME ")";
  66. #ifdef TAG
  67.     char *rr_delimiter = "\n";
  68.     char *revision = TAG;
  69. #else
  70.     char *rr_delimiter = "";
  71.     char *revision = "";
  72. #endif
  73. char *copyright = "Copyright (C) 2001-2005 Jakub Jermar\nCopyright (C) 2005 HelenOS project";
  74.  
  75. config_t config;
  76. context_t ctx;
  77.  
  78. /*
  79.  * These 'hardcoded' variables will be intialised by
  80.  * the linker or the low level assembler code with
  81.  * appropriate sizes and addresses.
  82.  */
  83. __address hardcoded_load_address = 0;
  84. size_t hardcoded_ktext_size = 0;
  85. size_t hardcoded_kdata_size = 0;
  86.  
  87. /*
  88.  * Size of memory in bytes taken by kernel and heap.
  89.  */
  90. static size_t kernel_size;
  91.  
  92. /*
  93.  * Size of heap.
  94.  */
  95. static size_t heap_size;
  96.  
  97.  
  98. /*
  99.  * Extra space between heap and stack
  100.  * enforced by alignment requirements.
  101.  */
  102. static size_t heap_delta;
  103.  
  104. void main_bsp(void);
  105. void main_ap(void);
  106.  
  107. /*
  108.  * These two functions prevent stack from underflowing during the
  109.  * kernel boot phase when SP is set to the very top of the reserved
  110.  * space. The stack could get corrupted by a fooled compiler-generated
  111.  * pop sequence otherwise.
  112.  */
  113. static void main_bsp_separated_stack(void);
  114. static void main_ap_separated_stack(void);
  115.  
  116. /** Bootstrap CPU main kernel routine
  117.  *
  118.  * Initializes the kernel by bootstrap CPU.
  119.  *
  120.  * Assuming interrupts_disable().
  121.  *
  122.  */
  123. void main_bsp(void)
  124. {
  125.     config.cpu_count = 1;
  126.     config.cpu_active = 1;
  127.     config.base = hardcoded_load_address;
  128.     config.memory_size = get_memory_size();
  129.  
  130.     heap_size = CONFIG_HEAP_SIZE + (config.memory_size/FRAME_SIZE)*sizeof(frame_t);
  131.     kernel_size = ALIGN(hardcoded_ktext_size + hardcoded_kdata_size + heap_size, PAGE_SIZE);
  132.     heap_delta = kernel_size - (hardcoded_ktext_size + hardcoded_kdata_size + heap_size);
  133.    
  134.     config.kernel_size = kernel_size + CONFIG_STACK_SIZE;
  135.    
  136.     context_save(&ctx);
  137.     early_mapping(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_STACK_SIZE + heap_size + heap_delta);
  138.     context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + kernel_size, CONFIG_STACK_SIZE);
  139.     context_restore(&ctx);
  140.     /* not reached */
  141. }
  142.  
  143.  
  144. /** Bootstrap CPU main kernel routine stack wrapper
  145.  *
  146.  * Second part of main_bsp().
  147.  *
  148.  */
  149. void main_bsp_separated_stack(void)
  150. {
  151.     vm_t *m;
  152.     task_t *k;
  153.     thread_t *t;
  154.    
  155.     the_initialize(THE);
  156.    
  157.     arch_pre_mm_init();
  158.     early_heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, heap_size + heap_delta);
  159.     frame_init();
  160.     page_init();
  161.     tlb_init();
  162.     arch_post_mm_init();
  163.  
  164.     printf("%s, release %s%s%s\n%s\n", project, release, rr_delimiter, revision, copyright);
  165.     printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
  166.         config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
  167.  
  168.     arch_late_init();
  169.    
  170.     smp_init();
  171.     printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
  172.     printf("config.cpu_count=%d\n", config.cpu_count);
  173.  
  174.     cpu_init();
  175.  
  176.     calibrate_delay_loop();
  177.    
  178.     timeout_init();
  179.     scheduler_init();
  180.     task_init();
  181.     thread_init();
  182.  
  183.     /*
  184.      * Create kernel vm mapping.
  185.      */
  186.     m = vm_create(GET_PTL0_ADDRESS());
  187.     if (!m)
  188.         panic("can't create kernel vm address space\n");
  189.  
  190.     /*
  191.      * Create kernel task.
  192.      */
  193.     k = task_create(m);
  194.     if (!k)
  195.         panic("can't create kernel task\n");
  196.        
  197.     /*
  198.      * Create the first thread.
  199.      */
  200.     t = thread_create(kinit, NULL, k, 0);
  201.     if (!t)
  202.         panic("can't create kinit thread\n");
  203.     thread_ready(t);
  204.     /*
  205.      * This call to scheduler() will return to kinit,
  206.      * starting the thread of kernel threads.
  207.      */
  208.     scheduler();
  209.     /* not reached */
  210. }
  211.  
  212.  
  213. #ifdef CONFIG_SMP
  214. /** Application CPUs main kernel routine
  215.  *
  216.  * Executed by application processors, temporary stack
  217.  * is at ctx.sp which was set during BP boot.
  218.  *
  219.  * Assuming interrupts_disable()'d.
  220.  *
  221.  */
  222. void main_ap(void)
  223. {
  224.     /*
  225.      * Incrementing the active CPU counter will guarantee that the
  226.      * pm_init() will not attempt to build GDT and IDT tables again.
  227.      * Neither frame_init() will do the complete thing. Neither cpu_init()
  228.      * will do.
  229.      */
  230.     config.cpu_active++;
  231.  
  232.     /*
  233.      * The THE structure is well defined because ctx.sp is used as stack.
  234.      */
  235.     the_initialize(THE);
  236.    
  237.     arch_pre_mm_init();
  238.     frame_init();
  239.     page_init();
  240.     tlb_init();
  241.     arch_post_mm_init();
  242.    
  243.     cpu_init();
  244.    
  245.     calibrate_delay_loop();
  246.  
  247.     l_apic_init();
  248.     l_apic_debug();
  249.  
  250.     the_copy(THE, (the_t *) CPU->stack);
  251.  
  252.     /*
  253.      * If we woke kmp up before we left the kernel stack, we could
  254.      * collide with another CPU coming up. To prevent this, we
  255.      * switch to this cpu's private stack prior to waking kmp up.
  256.      */
  257.     context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
  258.     context_restore(&CPU->saved_context);
  259.     /* not reached */
  260. }
  261.  
  262.  
  263. /** Application CPUs main kernel routine stack wrapper
  264.  *
  265.  * Second part of main_ap().
  266.  *
  267.  */
  268. void main_ap_separated_stack(void)
  269. {
  270.     /*
  271.      * Configure timeouts for this cpu.
  272.      */
  273.     timeout_init();
  274.  
  275.     waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
  276.     scheduler();
  277.     /* not reached */
  278. }
  279. #endif /* CONFIG_SMP */
  280.