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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 <arch/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 <mm/frame.h>
  51. #include <mm/page.h>
  52. #include <mm/tlb.h>
  53. #include <synch/waitq.h>
  54.  
  55. #include <arch.h>
  56.  
  57. char *project = "SPARTAN kernel";
  58. char *copyright = "Copyright (C) 2001-2005 Jakub Jermar, Copyright (C) 2005 HelenOS project";
  59.  
  60. config_t config;
  61. context_t ctx;
  62.  
  63. /*
  64.  * These 'hardcoded' variables will be intialised by
  65.  * the linker with appropriate sizes and addresses.
  66.  */
  67. __address hardcoded_load_address = 0;
  68. __u32 hardcoded_ktext_size = 0;
  69. __u32 hardcoded_kdata_size = 0;
  70.  
  71. void main_bsp(void);
  72. void main_ap(void);
  73.  
  74. /*
  75.  * These two functions prevent stack from underflowing during the
  76.  * kernel boot phase when SP is set to the very top of the reserved
  77.  * space. The stack could get corrupted by a fooled compiler-generated
  78.  * pop sequence otherwise.
  79.  */
  80. static void main_bsp_separated_stack(void);
  81. static void main_ap_separated_stack(void);
  82.  
  83. /*
  84.  * Executed by the bootstrap processor. cpu_priority_high()'d
  85.  */
  86. void main_bsp(void)
  87. {
  88.     config.cpu_count = 1;
  89.     config.cpu_active = 1;
  90.  
  91.     config.base = hardcoded_load_address;
  92.     config.memory_size = CONFIG_MEMORY_SIZE;
  93.     config.kernel_size = hardcoded_ktext_size + hardcoded_kdata_size + CONFIG_HEAP_SIZE + CONFIG_STACK_SIZE;
  94.  
  95.     context_save(&ctx);
  96.     ctx.sp = config.base + config.kernel_size - 8;
  97.     ctx.pc = (__address) main_bsp_separated_stack;
  98.     context_restore(&ctx);
  99.     /* not reached */
  100. }
  101.  
  102. void main_bsp_separated_stack(void) {
  103.     vm_t *m;
  104.     task_t *k;
  105.     thread_t *t;
  106.  
  107.     arch_pre_mm_init();
  108.  
  109.     heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_HEAP_SIZE);
  110.     frame_init();
  111.     page_init();
  112.     tlb_init();
  113.  
  114.     arch_post_mm_init();
  115.  
  116.     printf("%s\n%s\n", project, copyright);
  117.  
  118.     printf("%L: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
  119.         config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
  120.  
  121.     arch_late_init();
  122.    
  123.     smp_init();
  124.     printf("config.cpu_count=%d\n", config.cpu_count);
  125.  
  126.     cpu_init();
  127.     calibrate_delay_loop();
  128.  
  129.     timeout_init();
  130.     scheduler_init();
  131.     task_init();
  132.     thread_init();
  133.  
  134.     /*
  135.      * Create kernel vm mapping.
  136.      */
  137.     m = vm_create();
  138.     if (!m) panic("can't create kernel vm address space\n");
  139.  
  140.     /*
  141.      * Create kernel task.
  142.      */
  143.     k = task_create(m);
  144.     if (!k) panic("can't create kernel task\n");
  145.  
  146.     /*
  147.      * Create the first thread.
  148.      */
  149.     t = thread_create(kinit, NULL, k, 0);
  150.     if (!t) panic("can't create kinit thread\n");
  151.  
  152.     thread_ready(t);
  153.  
  154.     /*
  155.      * This call to scheduler() will return to kinit,
  156.      * starting the thread of kernel threads.
  157.      */
  158.     scheduler();
  159.     /* not reached */
  160. }
  161.  
  162. #ifdef __SMP__
  163. /*
  164.  * Executed by application processors. cpu_priority_high()'d
  165.  * Temporary stack is at ctx.sp which was set during BP boot.
  166.  */
  167. void main_ap(void)
  168. {
  169.     /*
  170.      * Incrementing the active CPU counter will guarantee that the
  171.      * pm_init() will not attempt to build GDT and IDT tables again.
  172.      * Neither frame_init() will do the complete thing. Neither cpu_init()
  173.      * will do.
  174.      */
  175.     config.cpu_active++;
  176.  
  177.     arch_pre_mm_init();
  178.     frame_init();
  179.     page_init();
  180.     arch_post_mm_init();
  181.  
  182.     cpu_init();
  183.     calibrate_delay_loop();
  184.  
  185.     l_apic_init();
  186.     l_apic_debug();
  187.  
  188.  
  189.     /*
  190.      * If we woke kmp up before we left the kernel stack, we could
  191.      * collide with another CPU coming up. To prevent this, we
  192.      * switch to this cpu's private stack prior to waking kmp up.
  193.      */
  194.     CPU->saved_context.sp = (__address) &CPU->stack[CPU_STACK_SIZE-8];
  195.     CPU->saved_context.pc = (__address) main_ap_separated_stack;
  196.     context_restore(&CPU->saved_context);
  197.     /* not reached */
  198. }
  199.  
  200. void main_ap_separated_stack(void)
  201. {
  202.     /*
  203.      * Configure timeouts for this cpu.
  204.      */
  205.     timeout_init();
  206.  
  207.     waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
  208.     scheduler();
  209.     /* not reached */
  210. }
  211. #endif /* __SMP__*/
  212.