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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 ia64  
  30.  * @ingroup others
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #include <arch.h>
  37. #include <arch/ski/ski.h>
  38. #include <arch/drivers/it.h>
  39. #include <arch/interrupt.h>
  40. #include <arch/barrier.h>
  41. #include <arch/asm.h>
  42. #include <arch/register.h>
  43. #include <arch/types.h>
  44. #include <arch/context.h>
  45. #include <arch/stack.h>
  46. #include <arch/mm/page.h>
  47. #include <mm/as.h>
  48. #include <config.h>
  49. #include <userspace.h>
  50. #include <console/console.h>
  51. #include <proc/uarg.h>
  52. #include <syscall/syscall.h>
  53.  
  54. static int kbd_release=0;
  55.  
  56. void arch_pre_main(void)
  57. {
  58.     /* Setup usermode init tasks. */
  59.     init.cnt = 8;
  60.     init.tasks[0].addr = INIT0_ADDRESS;
  61.     init.tasks[0].size = INIT0_SIZE;
  62.     init.tasks[1].addr = INIT0_ADDRESS + 0x400000;
  63.     init.tasks[1].size = INIT0_SIZE;
  64.     init.tasks[2].addr = INIT0_ADDRESS + 0x800000;
  65.     init.tasks[2].size = INIT0_SIZE;
  66.     init.tasks[3].addr = INIT0_ADDRESS + 0xc00000;
  67.     init.tasks[3].size = INIT0_SIZE;
  68.     init.tasks[4].addr = INIT0_ADDRESS + 0x1000000;
  69.     init.tasks[4].size = INIT0_SIZE;
  70.     init.tasks[5].addr = INIT0_ADDRESS + 0x1400000;
  71.     init.tasks[5].size = INIT0_SIZE;
  72.     init.tasks[6].addr = INIT0_ADDRESS + 0x1800000;
  73.     init.tasks[6].size = INIT0_SIZE;
  74.     init.tasks[7].addr = INIT0_ADDRESS + 0x1c00000;
  75.     init.tasks[7].size = INIT0_SIZE;
  76. }
  77.  
  78. void arch_pre_mm_init(void)
  79. {
  80.     /* Set Interruption Vector Address (i.e. location of interruption vector table). */
  81.     iva_write((__address) &ivt);
  82.     srlz_d();
  83.    
  84.     ski_init_console();
  85.     it_init(); 
  86. }
  87.  
  88. void arch_post_mm_init(void)
  89. {
  90.     ski_set_console_sysinfo();
  91. }
  92.  
  93. void arch_pre_smp_init(void)
  94. {
  95. }
  96.  
  97. void arch_post_smp_init(void)
  98. {
  99. }
  100.  
  101. /** Enter userspace and never return. */
  102. void userspace(uspace_arg_t *kernel_uarg)
  103. {
  104.     psr_t psr;
  105.     rsc_t rsc;
  106.  
  107.     psr.value = psr_read();
  108.     psr.cpl = PL_USER;
  109.     psr.i = true;               /* start with interrupts enabled */
  110.     psr.ic = true;
  111.     psr.ri = 0;             /* start with instruction #0 */
  112.     psr.bn = 1;             /* start in bank 0 */
  113.  
  114.     __asm__ volatile ("mov %0 = ar.rsc\n" : "=r" (rsc.value));
  115.     rsc.loadrs = 0;
  116.     rsc.be = false;
  117.     rsc.pl = PL_USER;
  118.     rsc.mode = 3;               /* eager mode */
  119.  
  120.     switch_to_userspace((__address) kernel_uarg->uspace_entry,
  121.                 ((__address) kernel_uarg->uspace_stack)+PAGE_SIZE-ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT),
  122.                 ((__address) kernel_uarg->uspace_stack)+PAGE_SIZE,
  123.                 (__address) kernel_uarg->uspace_uarg,
  124.                 psr.value, rsc.value);
  125.  
  126.     while (1) {
  127.         ;
  128.     }
  129. }
  130.  
  131. /** Set thread-local-storage pointer.
  132.  *
  133.  * We use r13 (a.k.a. tp) for this purpose.
  134.  */
  135. __native sys_tls_set(__native addr)
  136. {
  137.         return 0;
  138. }
  139.  
  140. /** Acquire console back for kernel
  141.  *
  142.  */
  143. void arch_grab_console(void)
  144. {
  145.     kbd_release=kbd_uspace;
  146.     kbd_uspace=0;
  147. }
  148. /** Return console to userspace
  149.  *
  150.  */
  151. void arch_release_console(void)
  152. {
  153.     kbd_uspace=kbd_release;
  154. }
  155.  
  156.  /** @}
  157.  */
  158.  
  159.