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