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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 <console/kconsole.h>
  40. #include <cpu.h>
  41. #include <align.h>
  42.  
  43. #ifdef CONFIG_SMP
  44. #include <arch/smp/apic.h>
  45. #include <arch/smp/mps.h>
  46. #endif /* CONFIG_SMP */
  47.  
  48. #include <smp/smp.h>
  49.  
  50. #include <arch/mm/memory_init.h>
  51. #include <mm/heap.h>
  52. #include <mm/frame.h>
  53. #include <mm/page.h>
  54. #include <mm/tlb.h>
  55. #include <mm/vm.h>
  56.  
  57. #include <synch/waitq.h>
  58.  
  59. #include <arch/arch.h>
  60. #include <arch.h>
  61. #include <arch/faddr.h>
  62.  
  63. #include <typedefs.h>
  64.  
  65. char *project = "SPARTAN kernel";
  66. char *release = RELEASE " (" NAME ")";
  67. #ifdef TAG
  68.     char *rr_delimiter = "\n";
  69.     char *revision = TAG;
  70. #else
  71.     char *rr_delimiter = "";
  72.     char *revision = "";
  73. #endif
  74. char *copyright = "Copyright (C) 2001-2005 HelenOS project";
  75.  
  76. config_t config;
  77. context_t ctx;
  78.  
  79. /**
  80.  * These 'hardcoded' variables will be intialized by
  81.  * the linker or the low level assembler code with
  82.  * appropriate sizes and addresses.
  83.  */
  84. __address hardcoded_load_address = 0;
  85. size_t hardcoded_ktext_size = 0;
  86. size_t hardcoded_kdata_size = 0;
  87.  
  88. __address init_addr = 0;
  89. size_t init_size = 0;
  90.  
  91. /**
  92.  * Size of memory in bytes taken by kernel and heap.
  93.  */
  94. static size_t kernel_size;
  95.  
  96. /**
  97.  * Size of heap.
  98.  */
  99. static size_t heap_size;
  100.  
  101.  
  102. /**
  103.  * Extra space between heap and stack
  104.  * enforced by alignment requirements.
  105.  */
  106. static size_t heap_delta;
  107.  
  108. void main_bsp(void);
  109. void main_ap(void);
  110.  
  111. /*
  112.  * These two functions prevent stack from underflowing during the
  113.  * kernel boot phase when SP is set to the very top of the reserved
  114.  * space. The stack could get corrupted by a fooled compiler-generated
  115.  * pop sequence otherwise.
  116.  */
  117. static void main_bsp_separated_stack(void);
  118. static void main_ap_separated_stack(void);
  119.  
  120. /** Bootstrap CPU main kernel routine
  121.  *
  122.  * Initializes the kernel by bootstrap CPU.
  123.  *
  124.  * Assuming interrupts_disable().
  125.  *
  126.  */
  127. void main_bsp(void)
  128. {
  129.     config.cpu_count = 1;
  130.     config.cpu_active = 1;
  131.     config.base = hardcoded_load_address;
  132.     config.memory_size = get_memory_size();
  133.  
  134.     heap_size = CONFIG_HEAP_SIZE + (config.memory_size/FRAME_SIZE)*sizeof(frame_t);
  135.     kernel_size = ALIGN(hardcoded_ktext_size + hardcoded_kdata_size + heap_size, PAGE_SIZE);
  136.     heap_delta = kernel_size - (hardcoded_ktext_size + hardcoded_kdata_size + heap_size);
  137.    
  138.     config.kernel_size = kernel_size + CONFIG_STACK_SIZE;
  139.    
  140.     context_save(&ctx);
  141.     early_mapping(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_STACK_SIZE + heap_size + heap_delta);
  142.     context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + kernel_size, CONFIG_STACK_SIZE);
  143.     context_restore(&ctx);
  144.     /* not reached */
  145. }
  146.  
  147.  
  148. /** Bootstrap CPU main kernel routine stack wrapper
  149.  *
  150.  * Second part of main_bsp().
  151.  *
  152.  */
  153. void main_bsp_separated_stack(void)
  154. {
  155.     vm_t *m;
  156.     task_t *k;
  157.     thread_t *t;
  158.    
  159.     the_initialize(THE);
  160.    
  161.     /*
  162.      * kconsole data structures must be initialized very early
  163.      * because other subsystems will register their respective
  164.      * commands.
  165.      */
  166.     kconsole_init();
  167.    
  168.     arch_pre_mm_init();
  169.     early_heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, heap_size + heap_delta);
  170.     frame_init();
  171.     page_init();
  172.     tlb_init();
  173.     arch_post_mm_init();
  174.  
  175.     printf("%s, release %s%s%s\n%s\n", project, release, rr_delimiter, revision, copyright);
  176.     printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
  177.         config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
  178.  
  179.     arch_pre_smp_init();
  180.     smp_init();
  181.     printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
  182.     printf("config.cpu_count=%d\n", config.cpu_count);
  183.  
  184.     cpu_init();
  185.  
  186.     calibrate_delay_loop();
  187.    
  188.     timeout_init();
  189.     scheduler_init();
  190.     task_init();
  191.     thread_init();
  192.  
  193.     /*
  194.      * Create kernel vm mapping.
  195.      */
  196.     m = vm_create(GET_PTL0_ADDRESS());
  197.     if (!m)
  198.         panic("can't create kernel vm address space\n");
  199.  
  200.     /*
  201.      * Create kernel task.
  202.      */
  203.     k = task_create(m);
  204.     if (!k)
  205.         panic("can't create kernel task\n");
  206.        
  207.     /*
  208.      * Create the first thread.
  209.      */
  210.     t = thread_create(kinit, NULL, k, 0);
  211.     if (!t)
  212.         panic("can't create kinit thread\n");
  213.     thread_ready(t);
  214.     /*
  215.      * This call to scheduler() will return to kinit,
  216.      * starting the thread of kernel threads.
  217.      */
  218.     scheduler();
  219.     /* not reached */
  220. }
  221.  
  222.  
  223. #ifdef CONFIG_SMP
  224. /** Application CPUs main kernel routine
  225.  *
  226.  * Executed by application processors, temporary stack
  227.  * is at ctx.sp which was set during BP boot.
  228.  *
  229.  * Assuming interrupts_disable()'d.
  230.  *
  231.  */
  232. void main_ap(void)
  233. {
  234.     /*
  235.      * Incrementing the active CPU counter will guarantee that the
  236.      * pm_init() will not attempt to build GDT and IDT tables again.
  237.      * Neither frame_init() will do the complete thing. Neither cpu_init()
  238.      * will do.
  239.      */
  240.     config.cpu_active++;
  241.  
  242.     /*
  243.      * The THE structure is well defined because ctx.sp is used as stack.
  244.      */
  245.     the_initialize(THE);
  246.    
  247.     arch_pre_mm_init();
  248.     frame_init();
  249.     page_init();
  250.     tlb_init();
  251.     arch_post_mm_init();
  252.    
  253.     cpu_init();
  254.    
  255.     calibrate_delay_loop();
  256.  
  257.     l_apic_init();
  258.     l_apic_debug();
  259.  
  260.     the_copy(THE, (the_t *) CPU->stack);
  261.  
  262.     /*
  263.      * If we woke kmp up before we left the kernel stack, we could
  264.      * collide with another CPU coming up. To prevent this, we
  265.      * switch to this cpu's private stack prior to waking kmp up.
  266.      */
  267.     context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
  268.     context_restore(&CPU->saved_context);
  269.     /* not reached */
  270. }
  271.  
  272.  
  273. /** Application CPUs main kernel routine stack wrapper
  274.  *
  275.  * Second part of main_ap().
  276.  *
  277.  */
  278. void main_ap_separated_stack(void)
  279. {
  280.     /*
  281.      * Configure timeouts for this cpu.
  282.      */
  283.     timeout_init();
  284.  
  285.     waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
  286.     scheduler();
  287.     /* not reached */
  288. }
  289. #endif /* CONFIG_SMP */
  290.