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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 <debug.h>
  34. #include <config.h>
  35. #include <time/clock.h>
  36. #include <proc/scheduler.h>
  37. #include <proc/thread.h>
  38. #include <proc/task.h>
  39. #include <main/kinit.h>
  40. #include <main/version.h>
  41. #include <console/kconsole.h>
  42. #include <cpu.h>
  43. #include <align.h>
  44. #include <interrupt.h>
  45. #include <arch/mm/memory_init.h>
  46. #include <mm/heap.h>
  47. #include <mm/frame.h>
  48. #include <mm/page.h>
  49. #include <mm/tlb.h>
  50. #include <mm/vm.h>
  51. #include <synch/waitq.h>
  52. #include <arch/arch.h>
  53. #include <arch.h>
  54. #include <arch/faddr.h>
  55. #include <typedefs.h>
  56.  
  57. #ifdef CONFIG_SMP
  58. #include <arch/smp/apic.h>
  59. #include <arch/smp/mps.h>
  60. #endif /* CONFIG_SMP */
  61. #include <smp/smp.h>
  62.  
  63. config_t config;    /**< Global configuration structure. */
  64.  
  65. context_t ctx;
  66.  
  67. /**
  68.  * These 'hardcoded' variables will be intialized 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. __address init_addr = 0;
  77. size_t init_size = 0;
  78.  
  79. void main_bsp(void);
  80. void main_ap(void);
  81.  
  82. /*
  83.  * These two functions prevent stack from underflowing during the
  84.  * kernel boot phase when SP is set to the very top of the reserved
  85.  * space. The stack could get corrupted by a fooled compiler-generated
  86.  * pop sequence otherwise.
  87.  */
  88. static void main_bsp_separated_stack(void);
  89. #ifdef CONFIG_SMP
  90. static void main_ap_separated_stack(void);
  91. #endif
  92.  
  93. /** Bootstrap CPU main kernel routine
  94.  *
  95.  * Initializes the kernel by bootstrap CPU.
  96.  * This function passes control directly to
  97.  * main_bsp_separated_stack().
  98.  *
  99.  * Assuming interrupts_disable().
  100.  *
  101.  */
  102. void main_bsp(void)
  103. {
  104.     config.cpu_count = 1;
  105.     config.cpu_active = 1;
  106.    
  107.     config.base = hardcoded_load_address;
  108.     config.memory_size = get_memory_size();
  109.     config.init_addr = init_addr;
  110.     config.init_size = init_size;
  111.    
  112.     if (init_size > 0)
  113.         config.heap_addr = init_addr + init_size;
  114.     else
  115.         config.heap_addr = hardcoded_load_address + hardcoded_ktext_size + hardcoded_kdata_size;
  116.    
  117.     config.heap_size = CONFIG_HEAP_SIZE + (config.memory_size / FRAME_SIZE) * sizeof(frame_t);
  118.    
  119.     config.kernel_size = ALIGN_UP(config.heap_addr - hardcoded_load_address + config.heap_size, PAGE_SIZE);
  120.     config.heap_delta = config.kernel_size - (config.heap_addr - hardcoded_load_address + config.heap_size);
  121.     config.kernel_size = config.kernel_size + CONFIG_STACK_SIZE;
  122.    
  123.     context_save(&ctx);
  124.     context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + config.kernel_size, CONFIG_STACK_SIZE);
  125.     context_restore(&ctx);
  126.     /* not reached */
  127. }
  128.  
  129.  
  130. /** Bootstrap CPU main kernel routine stack wrapper
  131.  *
  132.  * Second part of main_bsp().
  133.  *
  134.  */
  135. void main_bsp_separated_stack(void)
  136. {
  137.     vm_t *m;
  138.     task_t *k;
  139.     thread_t *t;
  140.    
  141.     the_initialize(THE);
  142.    
  143.     /*
  144.      * kconsole data structures must be initialized very early
  145.      * because other subsystems will register their respective
  146.      * commands.
  147.      */
  148.     kconsole_init();
  149.  
  150.     /* Exception handler initialization, before architecture
  151.      * starts adding its own handlers
  152.      */
  153.     exc_init();
  154.    
  155.     arch_pre_mm_init();
  156.     early_heap_init(config.heap_addr, config.heap_size + config.heap_delta);
  157.     frame_init();
  158.     page_init();
  159.     tlb_init();
  160.     arch_post_mm_init();
  161.  
  162.     version_print();
  163.  
  164.     printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
  165.         config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
  166.  
  167.     arch_pre_smp_init();
  168.     smp_init();
  169.     printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
  170.     printf("config.cpu_count=%d\n", config.cpu_count);
  171.  
  172.     cpu_init();
  173.  
  174.     calibrate_delay_loop();
  175.  
  176.     timeout_init();
  177.     scheduler_init();
  178.     task_init();
  179.     thread_init();
  180.    
  181.     if (config.init_size > 0)
  182.         printf("config.init_addr=%X, config.init_size=%d\n", config.init_addr, config.init_size);
  183.  
  184.     /*
  185.      * Create kernel vm mapping.
  186.      */
  187.     m = vm_create(GET_PTL0_ADDRESS());
  188.     if (!m)
  189.         panic("can't create kernel vm address space\n");
  190.  
  191.     /*
  192.      * Create kernel task.
  193.      */
  194.     k = task_create(m);
  195.     if (!k)
  196.         panic("can't create kernel task\n");
  197.        
  198.     /*
  199.      * Create the first thread.
  200.      */
  201.     t = thread_create(kinit, NULL, k, 0);
  202.     if (!t)
  203.         panic("can't create kinit thread\n");
  204.     thread_ready(t);
  205.  
  206.     /*
  207.      * This call to scheduler() will return to kinit,
  208.      * starting the thread of kernel threads.
  209.      */
  210.     scheduler();
  211.     /* not reached */
  212. }
  213.  
  214.  
  215. #ifdef CONFIG_SMP
  216. /** Application CPUs main kernel routine
  217.  *
  218.  * Executed by application processors, temporary stack
  219.  * is at ctx.sp which was set during BP boot.
  220.  * This function passes control directly to
  221.  * main_ap_separated_stack().
  222.  *
  223.  * Assuming interrupts_disable()'d.
  224.  *
  225.  */
  226. void main_ap(void)
  227. {
  228.     /*
  229.      * Incrementing the active CPU counter will guarantee that the
  230.      * pm_init() will not attempt to build GDT and IDT tables again.
  231.      * Neither frame_init() will do the complete thing. Neither cpu_init()
  232.      * will do.
  233.      */
  234.     config.cpu_active++;
  235.  
  236.     /*
  237.      * The THE structure is well defined because ctx.sp is used as stack.
  238.      */
  239.     the_initialize(THE);
  240.    
  241.     arch_pre_mm_init();
  242.     frame_init();
  243.     page_init();
  244.     tlb_init();
  245.     arch_post_mm_init();
  246.    
  247.     cpu_init();
  248.    
  249.     calibrate_delay_loop();
  250.  
  251.     l_apic_init();
  252.     l_apic_debug();
  253.  
  254.     the_copy(THE, (the_t *) CPU->stack);
  255.  
  256.     /*
  257.      * If we woke kmp up before we left the kernel stack, we could
  258.      * collide with another CPU coming up. To prevent this, we
  259.      * switch to this cpu's private stack prior to waking kmp up.
  260.      */
  261.     context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
  262.     context_restore(&CPU->saved_context);
  263.     /* not reached */
  264. }
  265.  
  266.  
  267. /** Application CPUs main kernel routine stack wrapper
  268.  *
  269.  * Second part of main_ap().
  270.  *
  271.  */
  272. void main_ap_separated_stack(void)
  273. {
  274.     /*
  275.      * Configure timeouts for this cpu.
  276.      */
  277.     timeout_init();
  278.  
  279.     waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
  280.     scheduler();
  281.     /* not reached */
  282. }
  283. #endif /* CONFIG_SMP */
  284.