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