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