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  1. /*
  2.  * Copyright (c) 2005 Ondrej Palkovsky
  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 amd64proc
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <proc/scheduler.h>
  36. #include <cpu.h>
  37. #include <proc/task.h>
  38. #include <proc/thread.h>
  39. #include <arch.h>
  40. #include <arch/context.h>   /* SP_DELTA */
  41. #include <arch/asm.h>
  42. #include <print.h>
  43. #include <arch/pm.h>
  44. #include <arch/ddi/ddi.h>
  45.  
  46. /** Perform amd64 specific tasks needed before the new task is run.
  47.  *
  48.  * Interrupts are disabled.
  49.  */
  50. void before_task_runs_arch(void)
  51. {
  52.     io_perm_bitmap_install();
  53. }
  54.  
  55. /** Perform amd64 specific tasks needed before the new thread is scheduled. */
  56. void before_thread_runs_arch(void)
  57. {
  58.     CPU->arch.tss->rsp0 =
  59.         (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA];
  60.  
  61.     /*
  62.      * Syscall support.
  63.      */
  64.     swapgs();
  65.     write_msr(AMD_MSR_GS, (uintptr_t)THREAD->arch.syscall_rsp);
  66.     swapgs();
  67.  
  68.     /* TLS support - set FS to thread local storage */
  69.     write_msr(AMD_MSR_FS, THREAD->arch.tls);
  70. }
  71.  
  72. void after_thread_ran_arch(void)
  73. {
  74. }
  75.  
  76. /** @}
  77.  */
  78.