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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. __address init_addr = 0;
  88. size_t init_size = 0;
  89.  
  90. /*
  91.  * Size of memory in bytes taken by kernel and heap.
  92.  */
  93. static size_t kernel_size;
  94.  
  95. /*
  96.  * Size of heap.
  97.  */
  98. static size_t heap_size;
  99.  
  100.  
  101. /*
  102.  * Extra space between heap and stack
  103.  * enforced by alignment requirements.
  104.  */
  105. static size_t heap_delta;
  106.  
  107. void main_bsp(void);
  108. void main_ap(void);
  109.  
  110. /*
  111.  * These two functions prevent stack from underflowing during the
  112.  * kernel boot phase when SP is set to the very top of the reserved
  113.  * space. The stack could get corrupted by a fooled compiler-generated
  114.  * pop sequence otherwise.
  115.  */
  116. static void main_bsp_separated_stack(void);
  117. static void main_ap_separated_stack(void);
  118.  
  119. /** Bootstrap CPU main kernel routine
  120.  *
  121.  * Initializes the kernel by bootstrap CPU.
  122.  *
  123.  * Assuming interrupts_disable().
  124.  *
  125.  */
  126. void main_bsp(void)
  127. {
  128.     config.cpu_count = 1;
  129.     config.cpu_active = 1;
  130.     config.base = hardcoded_load_address;
  131.     config.memory_size = get_memory_size();
  132.  
  133.     heap_size = CONFIG_HEAP_SIZE + (config.memory_size/FRAME_SIZE)*sizeof(frame_t);
  134.     kernel_size = ALIGN(hardcoded_ktext_size + hardcoded_kdata_size + heap_size, PAGE_SIZE);
  135.     heap_delta = kernel_size - (hardcoded_ktext_size + hardcoded_kdata_size + heap_size);
  136.    
  137.     config.kernel_size = kernel_size + CONFIG_STACK_SIZE;
  138.    
  139.     context_save(&ctx);
  140.     early_mapping(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_STACK_SIZE + heap_size + heap_delta);
  141.     context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + kernel_size, CONFIG_STACK_SIZE);
  142.     context_restore(&ctx);
  143.     /* not reached */
  144. }
  145.  
  146.  
  147. /** Bootstrap CPU main kernel routine stack wrapper
  148.  *
  149.  * Second part of main_bsp().
  150.  *
  151.  */
  152. void main_bsp_separated_stack(void)
  153. {
  154.     vm_t *m;
  155.     task_t *k;
  156.     thread_t *t;
  157.    
  158.     the_initialize(THE);
  159.    
  160.     arch_pre_mm_init();
  161.     early_heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, heap_size + heap_delta);
  162.     frame_init();
  163.     page_init();
  164.     tlb_init();
  165.     arch_post_mm_init();
  166.  
  167.     printf("%s, release %s%s%s\n%s\n", project, release, rr_delimiter, revision, copyright);
  168.     printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
  169.         config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
  170.  
  171.     arch_pre_smp_init();
  172.     smp_init();
  173.     arch_post_smp_init();
  174.     printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
  175.     printf("config.cpu_count=%d\n", config.cpu_count);
  176.  
  177.     cpu_init();
  178.  
  179.     calibrate_delay_loop();
  180.    
  181.     timeout_init();
  182.     scheduler_init();
  183.     task_init();
  184.     thread_init();
  185.  
  186.     /*
  187.      * Create kernel vm mapping.
  188.      */
  189.     m = vm_create(GET_PTL0_ADDRESS());
  190.     if (!m)
  191.         panic("can't create kernel vm address space\n");
  192.  
  193.     /*
  194.      * Create kernel task.
  195.      */
  196.     k = task_create(m);
  197.     if (!k)
  198.         panic("can't create kernel task\n");
  199.        
  200.     /*
  201.      * Create the first thread.
  202.      */
  203.     t = thread_create(kinit, NULL, k, 0);
  204.     if (!t)
  205.         panic("can't create kinit thread\n");
  206.     thread_ready(t);
  207.     /*
  208.      * This call to scheduler() will return to kinit,
  209.      * starting the thread of kernel threads.
  210.      */
  211.     scheduler();
  212.     /* not reached */
  213. }
  214.  
  215.  
  216. #ifdef CONFIG_SMP
  217. /** Application CPUs main kernel routine
  218.  *
  219.  * Executed by application processors, temporary stack
  220.  * is at ctx.sp which was set during BP boot.
  221.  *
  222.  * Assuming interrupts_disable()'d.
  223.  *
  224.  */
  225. void main_ap(void)
  226. {
  227.     /*
  228.      * Incrementing the active CPU counter will guarantee that the
  229.      * pm_init() will not attempt to build GDT and IDT tables again.
  230.      * Neither frame_init() will do the complete thing. Neither cpu_init()
  231.      * will do.
  232.      */
  233.     config.cpu_active++;
  234.  
  235.     /*
  236.      * The THE structure is well defined because ctx.sp is used as stack.
  237.      */
  238.     the_initialize(THE);
  239.    
  240.     arch_pre_mm_init();
  241.     frame_init();
  242.     page_init();
  243.     tlb_init();
  244.     arch_post_mm_init();
  245.    
  246.     cpu_init();
  247.    
  248.     calibrate_delay_loop();
  249.  
  250.     l_apic_init();
  251.     l_apic_debug();
  252.  
  253.     the_copy(THE, (the_t *) CPU->stack);
  254.  
  255.     /*
  256.      * If we woke kmp up before we left the kernel stack, we could
  257.      * collide with another CPU coming up. To prevent this, we
  258.      * switch to this cpu's private stack prior to waking kmp up.
  259.      */
  260.     context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
  261.     context_restore(&CPU->saved_context);
  262.     /* not reached */
  263. }
  264.  
  265.  
  266. /** Application CPUs main kernel routine stack wrapper
  267.  *
  268.  * Second part of main_ap().
  269.  *
  270.  */
  271. void main_ap_separated_stack(void)
  272. {
  273.     /*
  274.      * Configure timeouts for this cpu.
  275.      */
  276.     timeout_init();
  277.  
  278.     waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
  279.     scheduler();
  280.     /* not reached */
  281. }
  282. #endif /* CONFIG_SMP */
  283.