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