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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. #include <arch.h>
  30.  
  31. #include <arch/types.h>
  32.  
  33. #include <config.h>
  34.  
  35. #include <arch/ega.h>
  36. #include <genarch/i8042/i8042.h>
  37. #include <arch/i8254.h>
  38. #include <arch/i8259.h>
  39.  
  40. #include <arch/bios/bios.h>
  41. #include <arch/mm/memory_init.h>
  42. #include <arch/cpu.h>
  43. #include <print.h>
  44. #include <arch/cpuid.h>
  45. #include <genarch/acpi/acpi.h>
  46. #include <panic.h>
  47. #include <interrupt.h>
  48. #include <arch/syscall.h>
  49.  
  50. /** Disable I/O on non-privileged levels
  51.  *
  52.  * Clean IOPL(12,13) and NT(14) flags in EFLAGS register
  53.  */
  54. static void clean_IOPL_NT_flags(void)
  55. {
  56.     asm
  57.     (
  58.         "pushfq;"
  59.         "pop %%rax;"
  60.         "and $~(0x7000),%%rax;"
  61.         "pushq %%rax;"
  62.         "popfq;"
  63.         :
  64.         :
  65.         :"%rax"
  66.     );
  67. }
  68.  
  69. /** Disable alignment check
  70.  *
  71.  * Clean AM(18) flag in CR0 register
  72.  */
  73. static void clean_AM_flag(void)
  74. {
  75.     asm
  76.     (
  77.         "mov %%cr0,%%rax;"
  78.         "and $~(0x40000),%%rax;"
  79.         "mov %%rax,%%cr0;"
  80.         :
  81.         :
  82.         :"%rax"
  83.     );
  84. }
  85.  
  86. void arch_pre_mm_init(void)
  87. {
  88.     struct cpu_info cpuid_s;
  89.  
  90.     cpuid(AMD_CPUID_EXTENDED,&cpuid_s);
  91.     if (! (cpuid_s.cpuid_edx & (1<<AMD_EXT_NOEXECUTE)))
  92.         panic("Processor does not support No-execute pages.\n");
  93.  
  94.     cpuid(INTEL_CPUID_STANDARD,&cpuid_s);
  95.     if (! (cpuid_s.cpuid_edx & (1<<INTEL_FXSAVE)))
  96.         panic("Processor does not support FXSAVE/FXRESTORE.\n");
  97.    
  98.     if (! (cpuid_s.cpuid_edx & (1<<INTEL_SSE2)))
  99.         panic("Processor does not support SSE2 instructions.\n");
  100.  
  101.     /* Enable No-execute pages */
  102.     set_efer_flag(AMD_NXE_FLAG);
  103.     /* Enable FPU */
  104.     cpu_setup_fpu();
  105.  
  106.     /* Initialize segmentation */
  107.     pm_init();
  108.  
  109.         /* Disable I/O on nonprivileged levels
  110.      * clear the NT(nested-thread) flag
  111.      */
  112.     clean_IOPL_NT_flags();
  113.     /* Disable alignment check */
  114.     clean_AM_flag();
  115.  
  116.     if (config.cpu_active == 1) {
  117.         bios_init();
  118.         i8259_init();   /* PIC */
  119.         i8254_init();   /* hard clock */
  120.  
  121.         #ifdef CONFIG_SMP
  122.         exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
  123.                  tlb_shootdown_ipi);
  124.         #endif /* CONFIG_SMP */
  125.     }
  126. }
  127.  
  128. void arch_post_mm_init(void)
  129. {
  130.     if (config.cpu_active == 1) {
  131.         ega_init(); /* video */
  132.     }
  133.     /* Setup fast SYSCALL/SYSRET */
  134.     syscall_setup_cpu();
  135.  
  136. }
  137.  
  138. void arch_pre_smp_init(void)
  139. {
  140.     if (config.cpu_active == 1) {
  141.         memory_print_map();
  142.        
  143.         #ifdef CONFIG_SMP
  144.         acpi_init();
  145.         #endif /* CONFIG_SMP */
  146.     }
  147. }
  148.  
  149. void arch_post_smp_init(void)
  150. {
  151.     i8042_init();   /* keyboard controller */
  152. }
  153.  
  154. void calibrate_delay_loop(void)
  155. {
  156.     i8254_calibrate_delay_loop();
  157.     i8254_normal_operation();
  158. }
  159.