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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 <console/kconsole.h>
  41. #include <cpu.h>
  42. #include <align.h>
  43.  
  44. #ifdef CONFIG_SMP
  45. #include <arch/smp/apic.h>
  46. #include <arch/smp/mps.h>
  47. #endif /* CONFIG_SMP */
  48.  
  49. #include <smp/smp.h>
  50.  
  51. #include <arch/mm/memory_init.h>
  52. #include <mm/heap.h>
  53. #include <mm/frame.h>
  54. #include <mm/page.h>
  55. #include <mm/tlb.h>
  56. #include <mm/vm.h>
  57.  
  58. #include <synch/waitq.h>
  59.  
  60. #include <arch/arch.h>
  61. #include <arch.h>
  62. #include <arch/faddr.h>
  63.  
  64. #include <typedefs.h>
  65.  
  66. char *project = "SPARTAN kernel";
  67. char *copyright = "Copyright (C) 2001-2005 HelenOS project";
  68. char *release = RELEASE;
  69. char *name = NAME;
  70. char *arch = STRING(ARCH);
  71.  
  72. #ifdef REVISION
  73.     char *revision = ", revision " REVISION;
  74. #else
  75.     char *revision = "";
  76. #endif
  77.  
  78. #ifdef TIMESTAMP
  79.     char *timestamp = " on " TIMESTAMP;
  80. #else
  81.     char *timestamp = "";
  82. #endif
  83.  
  84.  
  85. config_t config;
  86. context_t ctx;
  87.  
  88. /**
  89.  * These 'hardcoded' variables will be intialized by
  90.  * the linker or the low level assembler code with
  91.  * appropriate sizes and addresses.
  92.  */
  93. __address hardcoded_load_address = 0;
  94. size_t hardcoded_ktext_size = 0;
  95. size_t hardcoded_kdata_size = 0;
  96.  
  97. __address init_addr = 0;
  98. size_t init_size = 0;
  99.  
  100. /**
  101.  * Size of memory in bytes taken by kernel and heap.
  102.  */
  103. static size_t kernel_size;
  104.  
  105. /**
  106.  * Size of heap.
  107.  */
  108. static size_t heap_size;
  109.  
  110.  
  111. /**
  112.  * Extra space between heap and stack
  113.  * enforced by alignment requirements.
  114.  */
  115. static size_t heap_delta;
  116.  
  117. void main_bsp(void);
  118. void main_ap(void);
  119.  
  120. /*
  121.  * These two functions prevent stack from underflowing during the
  122.  * kernel boot phase when SP is set to the very top of the reserved
  123.  * space. The stack could get corrupted by a fooled compiler-generated
  124.  * pop sequence otherwise.
  125.  */
  126. static void main_bsp_separated_stack(void);
  127. static void main_ap_separated_stack(void);
  128.  
  129. /** Bootstrap CPU main kernel routine
  130.  *
  131.  * Initializes the kernel by bootstrap CPU.
  132.  *
  133.  * Assuming interrupts_disable().
  134.  *
  135.  */
  136. void main_bsp(void)
  137. {
  138.     config.cpu_count = 1;
  139.     config.cpu_active = 1;
  140.     config.base = hardcoded_load_address;
  141.     config.memory_size = get_memory_size();
  142.  
  143.     heap_size = CONFIG_HEAP_SIZE + (config.memory_size/FRAME_SIZE)*sizeof(frame_t);
  144.     kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size + heap_size, PAGE_SIZE);
  145.     heap_delta = kernel_size - (hardcoded_ktext_size + hardcoded_kdata_size + heap_size);
  146.    
  147.     config.kernel_size = kernel_size + CONFIG_STACK_SIZE;
  148.    
  149.     context_save(&ctx);
  150.     early_mapping(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_STACK_SIZE + heap_size + heap_delta);
  151.     context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + kernel_size, CONFIG_STACK_SIZE);
  152.     context_restore(&ctx);
  153.     /* not reached */
  154. }
  155.  
  156.  
  157. /** Bootstrap CPU main kernel routine stack wrapper
  158.  *
  159.  * Second part of main_bsp().
  160.  *
  161.  */
  162. void main_bsp_separated_stack(void)
  163. {
  164.     vm_t *m;
  165.     task_t *k;
  166.     thread_t *t;
  167.    
  168.     the_initialize(THE);
  169.    
  170.     /*
  171.      * kconsole data structures must be initialized very early
  172.      * because other subsystems will register their respective
  173.      * commands.
  174.      */
  175.     kconsole_init();
  176.    
  177.     arch_pre_mm_init();
  178.     early_heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, heap_size + heap_delta);
  179.     frame_init();
  180.     page_init();
  181.     tlb_init();
  182.     arch_post_mm_init();
  183.  
  184.     printf("%s, release %s (%s)%s\nBuilt%s for %s\n%s\n", project, release, name, revision, timestamp, arch, copyright);
  185.     printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
  186.         config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
  187.  
  188.     arch_pre_smp_init();
  189.     smp_init();
  190.     printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
  191.     printf("config.cpu_count=%d\n", config.cpu_count);
  192.  
  193.     cpu_init();
  194.  
  195.     calibrate_delay_loop();
  196.    
  197.     timeout_init();
  198.     scheduler_init();
  199.     task_init();
  200.     thread_init();
  201.  
  202.     /*
  203.      * Create kernel vm mapping.
  204.      */
  205.     m = vm_create(GET_PTL0_ADDRESS());
  206.     if (!m)
  207.         panic("can't create kernel vm address space\n");
  208.  
  209.     /*
  210.      * Create kernel task.
  211.      */
  212.     k = task_create(m);
  213.     if (!k)
  214.         panic("can't create kernel task\n");
  215.        
  216.     /*
  217.      * Create the first thread.
  218.      */
  219.     t = thread_create(kinit, NULL, k, 0);
  220.     if (!t)
  221.         panic("can't create kinit thread\n");
  222.     thread_ready(t);
  223.     /*
  224.      * This call to scheduler() will return to kinit,
  225.      * starting the thread of kernel threads.
  226.      */
  227.     scheduler();
  228.     /* not reached */
  229. }
  230.  
  231.  
  232. #ifdef CONFIG_SMP
  233. /** Application CPUs main kernel routine
  234.  *
  235.  * Executed by application processors, temporary stack
  236.  * is at ctx.sp which was set during BP boot.
  237.  *
  238.  * Assuming interrupts_disable()'d.
  239.  *
  240.  */
  241. void main_ap(void)
  242. {
  243.     /*
  244.      * Incrementing the active CPU counter will guarantee that the
  245.      * pm_init() will not attempt to build GDT and IDT tables again.
  246.      * Neither frame_init() will do the complete thing. Neither cpu_init()
  247.      * will do.
  248.      */
  249.     config.cpu_active++;
  250.  
  251.     /*
  252.      * The THE structure is well defined because ctx.sp is used as stack.
  253.      */
  254.     the_initialize(THE);
  255.    
  256.     arch_pre_mm_init();
  257.     frame_init();
  258.     page_init();
  259.     tlb_init();
  260.     arch_post_mm_init();
  261.    
  262.     cpu_init();
  263.    
  264.     calibrate_delay_loop();
  265.  
  266.     l_apic_init();
  267.     l_apic_debug();
  268.  
  269.     the_copy(THE, (the_t *) CPU->stack);
  270.  
  271.     /*
  272.      * If we woke kmp up before we left the kernel stack, we could
  273.      * collide with another CPU coming up. To prevent this, we
  274.      * switch to this cpu's private stack prior to waking kmp up.
  275.      */
  276.     context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
  277.     context_restore(&CPU->saved_context);
  278.     /* not reached */
  279. }
  280.  
  281.  
  282. /** Application CPUs main kernel routine stack wrapper
  283.  *
  284.  * Second part of main_ap().
  285.  *
  286.  */
  287. void main_ap_separated_stack(void)
  288. {
  289.     /*
  290.      * Configure timeouts for this cpu.
  291.      */
  292.     timeout_init();
  293.  
  294.     waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
  295.     scheduler();
  296.     /* not reached */
  297. }
  298. #endif /* CONFIG_SMP */
  299.