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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
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch.h>
  36.  
  37. #include <arch/types.h>
  38.  
  39. #include <config.h>
  40.  
  41. #include <proc/thread.h>
  42. #include <genarch/multiboot/multiboot.h>
  43. #include <genarch/drivers/legacy/ia32/io.h>
  44. #include <genarch/drivers/ega/ega.h>
  45. #include <arch/drivers/vesa.h>
  46. #include <genarch/drivers/i8042/i8042.h>
  47. #include <genarch/kbrd/kbrd.h>
  48. #include <arch/drivers/i8254.h>
  49. #include <arch/drivers/i8259.h>
  50. #include <arch/boot/boot.h>
  51.  
  52. #ifdef CONFIG_SMP
  53. #include <arch/smp/apic.h>
  54. #endif
  55.  
  56. #include <arch/bios/bios.h>
  57. #include <arch/cpu.h>
  58. #include <print.h>
  59. #include <arch/cpuid.h>
  60. #include <genarch/acpi/acpi.h>
  61. #include <panic.h>
  62. #include <interrupt.h>
  63. #include <arch/syscall.h>
  64. #include <arch/debugger.h>
  65. #include <syscall/syscall.h>
  66. #include <console/console.h>
  67. #include <ddi/irq.h>
  68. #include <ddi/device.h>
  69. #include <sysinfo/sysinfo.h>
  70.  
  71. /** Disable I/O on non-privileged levels
  72.  *
  73.  * Clean IOPL(12,13) and NT(14) flags in EFLAGS register
  74.  */
  75. static void clean_IOPL_NT_flags(void)
  76. {
  77.     asm volatile (
  78.         "pushfq\n"
  79.         "pop %%rax\n"
  80.         "and $~(0x7000), %%rax\n"
  81.         "pushq %%rax\n"
  82.         "popfq\n"
  83.         ::: "%rax"
  84.     );
  85. }
  86.  
  87. /** Disable alignment check
  88.  *
  89.  * Clean AM(18) flag in CR0 register
  90.  */
  91. static void clean_AM_flag(void)
  92. {
  93.     asm volatile (
  94.         "mov %%cr0, %%rax\n"
  95.         "and $~(0x40000), %%rax\n"
  96.         "mov %%rax, %%cr0\n"
  97.         ::: "%rax"
  98.     );
  99. }
  100.  
  101. /** Perform amd64-specific initialization before main_bsp() is called.
  102.  *
  103.  * @param signature Should contain the multiboot signature.
  104.  * @param mi        Pointer to the multiboot information structure.
  105.  */
  106. void arch_pre_main(uint32_t signature, const multiboot_info_t *mi)
  107. {
  108.     /* Parse multiboot information obtained from the bootloader. */
  109.     multiboot_info_parse(signature, mi);
  110.    
  111. #ifdef CONFIG_SMP
  112.     /* Copy AP bootstrap routines below 1 MB. */
  113.     memcpy((void *) AP_BOOT_OFFSET, (void *) BOOT_OFFSET,
  114.         (size_t) &_hardcoded_unmapped_size);
  115. #endif
  116. }
  117.  
  118. void arch_pre_mm_init(void)
  119. {
  120.     /* Enable no-execute pages */
  121.     set_efer_flag(AMD_NXE_FLAG);
  122.     /* Enable FPU */
  123.     cpu_setup_fpu();
  124.  
  125.     /* Initialize segmentation */
  126.     pm_init();
  127.    
  128.     /* Disable I/O on nonprivileged levels
  129.      * clear the NT (nested-thread) flag
  130.      */
  131.     clean_IOPL_NT_flags();
  132.     /* Disable alignment check */
  133.     clean_AM_flag();
  134.  
  135.     if (config.cpu_active == 1) {
  136.         interrupt_init();
  137.         bios_init();
  138.        
  139.         /* PIC */
  140.         i8259_init();
  141.     }
  142. }
  143.  
  144.  
  145. void arch_post_mm_init(void)
  146. {
  147.     if (config.cpu_active == 1) {
  148.         /* Initialize IRQ routing */
  149.         irq_init(IRQ_COUNT, IRQ_COUNT);
  150.        
  151.         /* hard clock */
  152.         i8254_init();
  153.                
  154. #ifdef CONFIG_FB
  155.         if (vesa_present())
  156.             vesa_init();
  157.         else
  158. #endif
  159.             ega_init(EGA_BASE, EGA_VIDEORAM);   /* video */
  160.        
  161.         /* Enable debugger */
  162.         debugger_init();
  163.         /* Merge all memory zones to 1 big zone */
  164.         zone_merge_all();
  165.     }
  166.    
  167.     /* Setup fast SYSCALL/SYSRET */
  168.     syscall_setup_cpu();
  169. }
  170.  
  171. void arch_post_cpu_init()
  172. {
  173. #ifdef CONFIG_SMP
  174.     if (config.cpu_active > 1) {
  175.         l_apic_init();
  176.         l_apic_debug();
  177.     }
  178. #endif
  179. }
  180.  
  181. void arch_pre_smp_init(void)
  182. {
  183.     if (config.cpu_active == 1) {
  184. #ifdef CONFIG_SMP
  185.         acpi_init();
  186. #endif /* CONFIG_SMP */
  187.     }
  188. }
  189.  
  190. void arch_post_smp_init(void)
  191. {
  192.     devno_t devno = device_assign_devno();
  193.  
  194.         /*
  195.      * Initialize the keyboard module and conect it to stdin. Then
  196.      * initialize the i8042 controller and connect it to kbrdin. Enable
  197.      * keyboard interrupts.
  198.          */
  199.     kbrd_init(stdin);
  200.     (void) i8042_init((i8042_t *) I8042_BASE, devno, IRQ_KBD, &kbrdin);
  201.     trap_virtual_enable_irqs(1 << IRQ_KBD);
  202.  
  203.     /*
  204.      * This is the necessary evil until the userspace driver is entirely
  205.      * self-sufficient.
  206.      */
  207.     sysinfo_set_item_val("kbd", NULL, true);
  208.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  209.     sysinfo_set_item_val("kbd.inr", NULL, IRQ_KBD);
  210.     sysinfo_set_item_val("kbd.address.physical", NULL,
  211.         (uintptr_t) I8042_BASE);
  212.     sysinfo_set_item_val("kbd.address.kernel", NULL,
  213.         (uintptr_t) I8042_BASE);
  214. }
  215.  
  216. void calibrate_delay_loop(void)
  217. {
  218.     i8254_calibrate_delay_loop();
  219.     if (config.cpu_active == 1) {
  220.         /*
  221.          * This has to be done only on UP.
  222.          * On SMP, i8254 is not used for time keeping and its interrupt pin remains masked.
  223.          */
  224.         i8254_normal_operation();
  225.     }
  226. }
  227.  
  228. /** Set thread-local-storage pointer
  229.  *
  230.  * TLS pointer is set in FS register. Unfortunately the 64-bit
  231.  * part can be set only in CPL0 mode.
  232.  *
  233.  * The specs say, that on %fs:0 there is stored contents of %fs register,
  234.  * we need not to go to CPL0 to read it.
  235.  */
  236. unative_t sys_tls_set(unative_t addr)
  237. {
  238.     THREAD->arch.tls = addr;
  239.     write_msr(AMD_MSR_FS, addr);
  240.     return 0;
  241. }
  242.  
  243. /** Acquire console back for kernel
  244.  *
  245.  */
  246. void arch_grab_console(void)
  247. {
  248. #ifdef CONFIG_FB
  249.     vesa_redraw();
  250. #else
  251.     ega_redraw();
  252. #endif
  253. }
  254.  
  255. /** Return console to userspace
  256.  *
  257.  */
  258. void arch_release_console(void)
  259. {
  260. }
  261.  
  262. /** Construct function pointer
  263.  *
  264.  * @param fptr   function pointer structure
  265.  * @param addr   function address
  266.  * @param caller calling function address
  267.  *
  268.  * @return address of the function pointer
  269.  *
  270.  */
  271. void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
  272. {
  273.     return addr;
  274. }
  275.  
  276. /** @}
  277.  */
  278.