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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 amd64  amd64
  30.  * @ingroup others
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #include <arch.h>
  37.  
  38. #include <arch/types.h>
  39.  
  40. #include <config.h>
  41.  
  42. #include <proc/thread.h>
  43. #include <arch/drivers/ega.h>
  44. #include <arch/drivers/vesa.h>
  45. #include <genarch/i8042/i8042.h>
  46. #include <arch/drivers/i8254.h>
  47. #include <arch/drivers/i8259.h>
  48.  
  49. #include <arch/bios/bios.h>
  50. #include <arch/mm/memory_init.h>
  51. #include <arch/cpu.h>
  52. #include <print.h>
  53. #include <arch/cpuid.h>
  54. #include <genarch/acpi/acpi.h>
  55. #include <panic.h>
  56. #include <interrupt.h>
  57. #include <arch/syscall.h>
  58. #include <arch/debugger.h>
  59. #include <syscall/syscall.h>
  60. #include <console/console.h>
  61.  
  62.  
  63. /** Disable I/O on non-privileged levels
  64.  *
  65.  * Clean IOPL(12,13) and NT(14) flags in EFLAGS register
  66.  */
  67. static void clean_IOPL_NT_flags(void)
  68. {
  69.     asm
  70.     (
  71.         "pushfq;"
  72.         "pop %%rax;"
  73.         "and $~(0x7000),%%rax;"
  74.         "pushq %%rax;"
  75.         "popfq;"
  76.         :
  77.         :
  78.         :"%rax"
  79.     );
  80. }
  81.  
  82. /** Disable alignment check
  83.  *
  84.  * Clean AM(18) flag in CR0 register
  85.  */
  86. static void clean_AM_flag(void)
  87. {
  88.     asm
  89.     (
  90.         "mov %%cr0,%%rax;"
  91.         "and $~(0x40000),%%rax;"
  92.         "mov %%rax,%%cr0;"
  93.         :
  94.         :
  95.         :"%rax"
  96.     );
  97. }
  98.  
  99. void arch_pre_mm_init(void)
  100. {
  101.     struct cpu_info cpuid_s;
  102.  
  103.     cpuid(AMD_CPUID_EXTENDED,&cpuid_s);
  104.     if (! (cpuid_s.cpuid_edx & (1<<AMD_EXT_NOEXECUTE)))
  105.         panic("Processor does not support No-execute pages.\n");
  106.  
  107.     cpuid(INTEL_CPUID_STANDARD,&cpuid_s);
  108.     if (! (cpuid_s.cpuid_edx & (1<<INTEL_FXSAVE)))
  109.         panic("Processor does not support FXSAVE/FXRESTORE.\n");
  110.    
  111.     if (! (cpuid_s.cpuid_edx & (1<<INTEL_SSE2)))
  112.         panic("Processor does not support SSE2 instructions.\n");
  113.  
  114.     /* Enable No-execute pages */
  115.     set_efer_flag(AMD_NXE_FLAG);
  116.     /* Enable FPU */
  117.     cpu_setup_fpu();
  118.  
  119.     /* Initialize segmentation */
  120.     pm_init();
  121.  
  122.         /* Disable I/O on nonprivileged levels
  123.      * clear the NT(nested-thread) flag
  124.      */
  125.     clean_IOPL_NT_flags();
  126.     /* Disable alignment check */
  127.     clean_AM_flag();
  128.  
  129.     if (config.cpu_active == 1) {
  130.         bios_init();
  131.         i8259_init();   /* PIC */
  132.         i8254_init();   /* hard clock */
  133.  
  134.         #ifdef CONFIG_SMP
  135.         exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
  136.                  tlb_shootdown_ipi);
  137.         #endif /* CONFIG_SMP */
  138.     }
  139. }
  140.  
  141. void arch_post_mm_init(void)
  142. {
  143.     if (config.cpu_active == 1) {
  144. #ifdef CONFIG_FB
  145.         if (vesa_present())
  146.             vesa_init();
  147.         else
  148. #endif
  149.             ega_init(); /* video */
  150.         /* Enable debugger */
  151.         debugger_init();
  152.         /* Merge all memory zones to 1 big zone */
  153.         zone_merge_all();
  154.     }
  155.     /* Setup fast SYSCALL/SYSRET */
  156.     syscall_setup_cpu();
  157.    
  158. }
  159.  
  160. void arch_pre_smp_init(void)
  161. {
  162.     if (config.cpu_active == 1) {
  163.         memory_print_map();
  164.        
  165.         #ifdef CONFIG_SMP
  166.         acpi_init();
  167.         #endif /* CONFIG_SMP */
  168.     }
  169. }
  170.  
  171. void arch_post_smp_init(void)
  172. {
  173.     i8042_init();   /* keyboard controller */
  174. }
  175.  
  176. void calibrate_delay_loop(void)
  177. {
  178.     i8254_calibrate_delay_loop();
  179.     i8254_normal_operation();
  180. }
  181.  
  182. /** Set thread-local-storage pointer
  183.  *
  184.  * TLS pointer is set in FS register. Unfortunately the 64-bit
  185.  * part can be set only in CPL0 mode.
  186.  *
  187.  * The specs say, that on %fs:0 there is stored contents of %fs register,
  188.  * we need not to go to CPL0 to read it.
  189.  */
  190. __native sys_tls_set(__native addr)
  191. {
  192.     THREAD->arch.tls = addr;
  193.     write_msr(AMD_MSR_FS, addr);
  194.     return 0;
  195. }
  196.  
  197. /** Acquire console back for kernel
  198.  *
  199.  */
  200. void arch_grab_console(void)
  201. {
  202.     i8042_grab();
  203. }
  204. /** Return console to userspace
  205.  *
  206.  */
  207. void arch_release_console(void)
  208. {
  209.     i8042_release();
  210. }
  211.  
  212.  /** @}
  213.  */
  214.  
  215.