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  1. /*
  2.  * Copyright (C) 2005 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. /** @addtogroup sparc64
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch.h>
  36. #include <debug.h>
  37. #include <config.h>
  38. #include <arch/trap/trap.h>
  39. #include <arch/console.h>
  40. #include <arch/drivers/tick.h>
  41. #include <proc/thread.h>
  42. #include <console/console.h>
  43. #include <arch/boot/boot.h>
  44. #include <arch/arch.h>
  45. #include <arch/asm.h>
  46. #include <arch/mm/page.h>
  47. #include <arch/stack.h>
  48. #include <userspace.h>
  49.  
  50. bootinfo_t bootinfo;
  51.  
  52. void arch_pre_main(void)
  53. {
  54.     /* Setup usermode */
  55.     init.cnt = bootinfo.taskmap.count;
  56.    
  57.     uint32_t i;
  58.  
  59.     for (i = 0; i < bootinfo.taskmap.count; i++) {
  60.         init.tasks[i].addr = PA2KA(bootinfo.taskmap.tasks[i].addr);
  61.         init.tasks[i].size = bootinfo.taskmap.tasks[i].size;
  62.     }
  63. }
  64.  
  65. void arch_pre_mm_init(void)
  66. {
  67.     trap_init();
  68.     tick_init();
  69. }
  70.  
  71. void arch_post_mm_init(void)
  72. {
  73.     standalone_sparc64_console_init();
  74. }
  75.  
  76. void arch_pre_smp_init(void)
  77. {
  78. }
  79.  
  80. void arch_post_smp_init(void)
  81. {
  82.     thread_t *t;
  83.  
  84.     /*
  85.          * Create thread that polls keyboard.
  86.          */
  87.     t = thread_create(kkbdpoll, NULL, TASK, 0, "kkbdpoll");
  88.     if (!t)
  89.         panic("cannot create kkbdpoll\n");
  90.     thread_ready(t);
  91. }
  92.  
  93. /** Calibrate delay loop.
  94.  *
  95.  * On sparc64, we implement delay() by waiting for the TICK register to
  96.  * reach a pre-computed value, as opposed to performing some pre-computed
  97.  * amount of instructions of known duration. We set the delay_loop_const
  98.  * to 1 in order to neutralize the multiplication done by delay().
  99.  */
  100. void calibrate_delay_loop(void)
  101. {
  102.     CPU->delay_loop_const = 1;
  103. }
  104.  
  105. /** Wait several microseconds.
  106.  *
  107.  * We assume that interrupts are already disabled.
  108.  *
  109.  * @param t Microseconds to wait.
  110.  */
  111. void asm_delay_loop(const uint32_t usec)
  112. {
  113.     uint64_t stop = tick_read() + (uint64_t) usec * (uint64_t) CPU->arch.clock_frequency / 1000000;
  114.  
  115.     while (tick_read() < stop)
  116.         ;
  117. }
  118.  
  119. /** Switch to userspace. */
  120. void userspace(uspace_arg_t *kernel_uarg)
  121. {
  122.     switch_to_userspace((uintptr_t) kernel_uarg->uspace_entry,
  123.         ((uintptr_t) kernel_uarg->uspace_stack) + STACK_SIZE
  124.         - (ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT) + STACK_BIAS),
  125.         (uintptr_t) kernel_uarg->uspace_uarg);
  126.  
  127.     for (;;)
  128.         ;
  129.     /* not reached */
  130. }
  131.  
  132. /** @}
  133.  */
  134.