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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. #ifdef CONFIG_EGA
  160.             ega_init(EGA_BASE, EGA_VIDEORAM);  /* video */
  161. #else
  162.             {}
  163. #endif
  164.        
  165.         /* Enable debugger */
  166.         debugger_init();
  167.         /* Merge all memory zones to 1 big zone */
  168.         zone_merge_all();
  169.     }
  170.    
  171.     /* Setup fast SYSCALL/SYSRET */
  172.     syscall_setup_cpu();
  173. }
  174.  
  175. void arch_post_cpu_init()
  176. {
  177. #ifdef CONFIG_SMP
  178.     if (config.cpu_active > 1) {
  179.         l_apic_init();
  180.         l_apic_debug();
  181.     }
  182. #endif
  183. }
  184.  
  185. void arch_pre_smp_init(void)
  186. {
  187.     if (config.cpu_active == 1) {
  188. #ifdef CONFIG_SMP
  189.         acpi_init();
  190. #endif /* CONFIG_SMP */
  191.     }
  192. }
  193.  
  194. void arch_post_smp_init(void)
  195. {
  196. #ifdef CONFIG_PC_KBD
  197.     devno_t devno = device_assign_devno();
  198.    
  199.     /*
  200.      * Initialize the i8042 controller. Then initialize the keyboard
  201.      * module and connect it to i8042. Enable keyboard interrupts.
  202.      */
  203.     indev_t *kbrdin = i8042_init((i8042_t *) I8042_BASE, devno, IRQ_KBD);
  204.     if (kbrdin) {
  205.         kbrd_init(kbrdin);
  206.         trap_virtual_enable_irqs(1 << IRQ_KBD);
  207.     }
  208.    
  209.     /*
  210.      * This is the necessary evil until the userspace driver is entirely
  211.      * self-sufficient.
  212.      */
  213.     sysinfo_set_item_val("kbd", NULL, true);
  214.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  215.     sysinfo_set_item_val("kbd.inr", NULL, IRQ_KBD);
  216.     sysinfo_set_item_val("kbd.address.physical", NULL,
  217.         (uintptr_t) I8042_BASE);
  218.     sysinfo_set_item_val("kbd.address.kernel", NULL,
  219.         (uintptr_t) I8042_BASE);
  220. #endif
  221. }
  222.  
  223. void calibrate_delay_loop(void)
  224. {
  225.     i8254_calibrate_delay_loop();
  226.     if (config.cpu_active == 1) {
  227.         /*
  228.          * This has to be done only on UP.
  229.          * On SMP, i8254 is not used for time keeping and its interrupt pin remains masked.
  230.          */
  231.         i8254_normal_operation();
  232.     }
  233. }
  234.  
  235. /** Set thread-local-storage pointer
  236.  *
  237.  * TLS pointer is set in FS register. Unfortunately the 64-bit
  238.  * part can be set only in CPL0 mode.
  239.  *
  240.  * The specs say, that on %fs:0 there is stored contents of %fs register,
  241.  * we need not to go to CPL0 to read it.
  242.  */
  243. unative_t sys_tls_set(unative_t addr)
  244. {
  245.     THREAD->arch.tls = addr;
  246.     write_msr(AMD_MSR_FS, addr);
  247.     return 0;
  248. }
  249.  
  250. /** Acquire console back for kernel
  251.  *
  252.  */
  253. void arch_grab_console(void)
  254. {
  255. #ifdef CONFIG_FB
  256.     if (vesa_present())
  257.         vesa_redraw();
  258.     else
  259. #endif
  260. #ifdef CONFIG_EGA
  261.         ega_redraw();
  262. #else
  263.         {}
  264. #endif
  265. }
  266.  
  267. /** Return console to userspace
  268.  *
  269.  */
  270. void arch_release_console(void)
  271. {
  272. }
  273.  
  274. /** Construct function pointer
  275.  *
  276.  * @param fptr   function pointer structure
  277.  * @param addr   function address
  278.  * @param caller calling function address
  279.  *
  280.  * @return address of the function pointer
  281.  *
  282.  */
  283. void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
  284. {
  285.     return addr;
  286. }
  287.  
  288. /** @}
  289.  */
  290.