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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 <sysinfo/sysinfo.h>
  69.  
  70. /** Disable I/O on non-privileged levels
  71.  *
  72.  * Clean IOPL(12,13) and NT(14) flags in EFLAGS register
  73.  */
  74. static void clean_IOPL_NT_flags(void)
  75. {
  76.     asm volatile (
  77.         "pushfq\n"
  78.         "pop %%rax\n"
  79.         "and $~(0x7000), %%rax\n"
  80.         "pushq %%rax\n"
  81.         "popfq\n"
  82.         ::: "%rax"
  83.     );
  84. }
  85.  
  86. /** Disable alignment check
  87.  *
  88.  * Clean AM(18) flag in CR0 register
  89.  */
  90. static void clean_AM_flag(void)
  91. {
  92.     asm volatile (
  93.         "mov %%cr0, %%rax\n"
  94.         "and $~(0x40000), %%rax\n"
  95.         "mov %%rax, %%cr0\n"
  96.         ::: "%rax"
  97.     );
  98. }
  99.  
  100. /** Perform amd64-specific initialization before main_bsp() is called.
  101.  *
  102.  * @param signature Should contain the multiboot signature.
  103.  * @param mi        Pointer to the multiboot information structure.
  104.  */
  105. void arch_pre_main(uint32_t signature, const multiboot_info_t *mi)
  106. {
  107.     /* Parse multiboot information obtained from the bootloader. */
  108.     multiboot_info_parse(signature, mi);
  109.    
  110. #ifdef CONFIG_SMP
  111.     /* Copy AP bootstrap routines below 1 MB. */
  112.     memcpy((void *) AP_BOOT_OFFSET, (void *) BOOT_OFFSET,
  113.         (size_t) &_hardcoded_unmapped_size);
  114. #endif
  115. }
  116.  
  117. void arch_pre_mm_init(void)
  118. {
  119.     /* Enable no-execute pages */
  120.     set_efer_flag(AMD_NXE_FLAG);
  121.     /* Enable FPU */
  122.     cpu_setup_fpu();
  123.  
  124.     /* Initialize segmentation */
  125.     pm_init();
  126.    
  127.     /* Disable I/O on nonprivileged levels
  128.      * clear the NT (nested-thread) flag
  129.      */
  130.     clean_IOPL_NT_flags();
  131.     /* Disable alignment check */
  132.     clean_AM_flag();
  133.  
  134.     if (config.cpu_active == 1) {
  135.         interrupt_init();
  136.         bios_init();
  137.        
  138.         /* PIC */
  139.         i8259_init();
  140.     }
  141. }
  142.  
  143.  
  144. void arch_post_mm_init(void)
  145. {
  146.     if (config.cpu_active == 1) {
  147.         /* Initialize IRQ routing */
  148.         irq_init(IRQ_COUNT, IRQ_COUNT);
  149.        
  150.         /* hard clock */
  151.         i8254_init();
  152.        
  153. #ifdef CONFIG_FB
  154.         if (vesa_present())
  155.             vesa_init();
  156.         else
  157. #endif
  158. #ifdef CONFIG_EGA
  159.             ega_init(EGA_BASE, EGA_VIDEORAM);  /* video */
  160. #else
  161.             {}
  162. #endif
  163.        
  164.         /* Enable debugger */
  165.         debugger_init();
  166.         /* Merge all memory zones to 1 big zone */
  167.         zone_merge_all();
  168.     }
  169.    
  170.     /* Setup fast SYSCALL/SYSRET */
  171.     syscall_setup_cpu();
  172. }
  173.  
  174. void arch_post_cpu_init()
  175. {
  176. #ifdef CONFIG_SMP
  177.     if (config.cpu_active > 1) {
  178.         l_apic_init();
  179.         l_apic_debug();
  180.     }
  181. #endif
  182. }
  183.  
  184. void arch_pre_smp_init(void)
  185. {
  186.     if (config.cpu_active == 1) {
  187. #ifdef CONFIG_SMP
  188.         acpi_init();
  189. #endif /* CONFIG_SMP */
  190.     }
  191. }
  192.  
  193. void arch_post_smp_init(void)
  194. {
  195. #ifdef CONFIG_PC_KBD
  196.     /*
  197.      * Initialize the i8042 controller. Then initialize the keyboard
  198.      * module and connect it to i8042. Enable keyboard interrupts.
  199.      */
  200.     i8042_instance_t *i8042_instance = i8042_init((i8042_t *) I8042_BASE, IRQ_KBD);
  201.     if (i8042_instance) {
  202.         kbrd_instance_t *kbrd_instance = kbrd_init();
  203.         if (kbrd_instance) {
  204.             indev_t *sink = stdin_wire();
  205.             indev_t *kbrd = kbrd_wire(kbrd_instance, sink);
  206.             i8042_wire(i8042_instance, kbrd);
  207.             trap_virtual_enable_irqs(1 << IRQ_KBD);
  208.         }
  209.     }
  210.    
  211.     /*
  212.      * This is the necessary evil until the userspace driver is entirely
  213.      * self-sufficient.
  214.      */
  215.     sysinfo_set_item_val("kbd", NULL, true);
  216.     sysinfo_set_item_val("kbd.inr", NULL, IRQ_KBD);
  217.     sysinfo_set_item_val("kbd.address.physical", NULL,
  218.         (uintptr_t) I8042_BASE);
  219.     sysinfo_set_item_val("kbd.address.kernel", NULL,
  220.         (uintptr_t) I8042_BASE);
  221. #endif
  222. }
  223.  
  224. void calibrate_delay_loop(void)
  225. {
  226.     i8254_calibrate_delay_loop();
  227.     if (config.cpu_active == 1) {
  228.         /*
  229.          * This has to be done only on UP.
  230.          * On SMP, i8254 is not used for time keeping and its interrupt pin remains masked.
  231.          */
  232.         i8254_normal_operation();
  233.     }
  234. }
  235.  
  236. /** Set thread-local-storage pointer
  237.  *
  238.  * TLS pointer is set in FS register. Unfortunately the 64-bit
  239.  * part can be set only in CPL0 mode.
  240.  *
  241.  * The specs say, that on %fs:0 there is stored contents of %fs register,
  242.  * we need not to go to CPL0 to read it.
  243.  */
  244. unative_t sys_tls_set(unative_t addr)
  245. {
  246.     THREAD->arch.tls = addr;
  247.     write_msr(AMD_MSR_FS, addr);
  248.     return 0;
  249. }
  250.  
  251. /** Acquire console back for kernel
  252.  *
  253.  */
  254. void arch_grab_console(void)
  255. {
  256. #ifdef CONFIG_FB
  257.     if (vesa_present())
  258.         vesa_redraw();
  259.     else
  260. #endif
  261. #ifdef CONFIG_EGA
  262.         ega_redraw();
  263. #else
  264.         {}
  265. #endif
  266. }
  267.  
  268. /** Return console to userspace
  269.  *
  270.  */
  271. void arch_release_console(void)
  272. {
  273. }
  274.  
  275. /** Construct function pointer
  276.  *
  277.  * @param fptr   function pointer structure
  278.  * @param addr   function address
  279.  * @param caller calling function address
  280.  *
  281.  * @return address of the function pointer
  282.  *
  283.  */
  284. void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
  285. {
  286.     return addr;
  287. }
  288.  
  289. void arch_reboot(void)
  290. {
  291. #ifdef CONFIG_PC_KBD
  292.     i8042_cpu_reset((i8042_t *) I8042_BASE);
  293. #endif
  294. }
  295.  
  296. /** @}
  297.  */
  298.