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  1. /*
  2.  * Copyright (c) 2007 Michal Kebrt
  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. /** @addtogroup arm32
  30.  * @{
  31.  */
  32. /** @file
  33.  *  @brief ARM32 architecture specific functions.
  34.  */
  35.  
  36. #include <arch.h>
  37. #include <arch/boot.h>
  38. #include <config.h>
  39. #include <arch/console.h>
  40. #include <ddi/device.h>
  41. #include <genarch/fb/fb.h>
  42. #include <genarch/fb/visuals.h>
  43. #include <ddi/irq.h>
  44. #include <arch/debug/print.h>
  45. #include <print.h>
  46. #include <config.h>
  47. #include <interrupt.h>
  48. #include <arch/regutils.h>
  49. #include <arch/machine.h>
  50. #include <userspace.h>
  51.  
  52. /** Information about loaded tasks. */
  53. bootinfo_t bootinfo;
  54.  
  55. /** Performs arm32 specific initialization before main_bsp() is called. */
  56. void arch_pre_main(void)
  57. {
  58.     unsigned int i;
  59.  
  60.     init.cnt = bootinfo.cnt;
  61.  
  62.     for (i = 0; i < bootinfo.cnt; ++i) {
  63.         init.tasks[i].addr = bootinfo.tasks[i].addr;
  64.         init.tasks[i].size = bootinfo.tasks[i].size;
  65.     }
  66.    
  67. }
  68.  
  69. /** Performs arm32 specific initialization before mm is initialized. */
  70. void arch_pre_mm_init(void)
  71. {
  72.     /* It is not assumed by default */
  73.     interrupts_disable();
  74. }
  75.  
  76. /** Performs arm32 specific initialization afterr mm is initialized. */
  77. void arch_post_mm_init(void)
  78. {
  79.     machine_hw_map_init();
  80.  
  81.     /* Initialize exception dispatch table */
  82.     exception_init();
  83.  
  84.     interrupt_init();
  85.    
  86.     console_init(device_assign_devno());
  87.  
  88. #ifdef CONFIG_FB
  89.     fb_init(machine_get_fb_address(), 640, 480, 1920, VISUAL_RGB_8_8_8);
  90. #endif
  91. }
  92.  
  93. /** Performs arm32 specific tasks needed after cpu is initialized.
  94.  *
  95.  * Currently the function is empty.
  96.  */
  97. void arch_post_cpu_init(void)
  98. {
  99. }
  100.  
  101.  
  102. /** Performs arm32 specific tasks needed before the multiprocessing is
  103.  * initialized.
  104.  *
  105.  * Currently the function is empty because SMP is not supported.
  106.  */
  107. void arch_pre_smp_init(void)
  108. {
  109. }
  110.  
  111.  
  112. /** Performs arm32 specific tasks needed after the multiprocessing is
  113.  * initialized.
  114.  *
  115.  * Currently the function is empty because SMP is not supported.
  116.  */
  117. void arch_post_smp_init(void)
  118. {
  119. }
  120.  
  121.  
  122. /** Performs arm32 specific tasks needed before the new task is run. */
  123. void before_task_runs_arch(void)
  124. {
  125.     tlb_invalidate_all();
  126. }
  127.  
  128.  
  129. /** Performs arm32 specific tasks needed before the new thread is scheduled.
  130.  *
  131.  * It sets supervisor_sp.
  132.  */
  133. void before_thread_runs_arch(void)
  134. {
  135.     uint8_t *stck;
  136.    
  137.     stck = &THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA];
  138.     supervisor_sp = (uintptr_t) stck;
  139. }
  140.  
  141. /** Performs arm32 specific tasks before a thread stops running.
  142.  *
  143.  * Currently the function is empty.
  144.  */
  145. void after_thread_ran_arch(void)
  146. {
  147. }
  148.  
  149. /** Halts CPU. */
  150. void cpu_halt(void)
  151. {
  152.     machine_cpu_halt();
  153. }
  154.  
  155. /** Reboot. */
  156. void arch_reboot()
  157. {
  158.     /* not implemented */
  159.     for (;;)
  160.         ;
  161. }
  162.  
  163. /** @}
  164.  */
  165.