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  1. /*
  2.  * Copyright (C) 2006 Martin Decky
  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 ia32xen
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch.h>
  36. #include <main/main.h>
  37.  
  38. #include <arch/types.h>
  39. #include <typedefs.h>
  40. #include <align.h>
  41.  
  42. #include <arch/pm.h>
  43.  
  44. #include <arch/drivers/xconsole.h>
  45. #include <arch/mm/page.h>
  46.  
  47. #include <arch/context.h>
  48.  
  49. #include <config.h>
  50.  
  51. #include <arch/interrupt.h>
  52. #include <arch/asm.h>
  53. #include <genarch/acpi/acpi.h>
  54.  
  55. #include <arch/bios/bios.h>
  56.  
  57. #include <arch/boot/boot.h>
  58. #include <arch/mm/memory_init.h>
  59. #include <interrupt.h>
  60. #include <arch/debugger.h>
  61. #include <proc/thread.h>
  62. #include <syscall/syscall.h>
  63. #include <console/console.h>
  64. #include <ddi/irq.h>
  65.  
  66. start_info_t start_info;
  67. memzone_t meminfo;
  68.  
  69. extern void xen_callback(void);
  70. extern void xen_failsafe_callback(void);
  71.  
  72. void arch_pre_main(void)
  73. {
  74.     xen_vm_assist(VMASST_CMD_ENABLE, VMASST_TYPE_WRITABLE_PAGETABLES);
  75.    
  76.     pte_t pte;
  77.     memsetb((uintptr_t) &pte, sizeof(pte), 0);
  78.    
  79.     pte.present = 1;
  80.     pte.writeable = 1;
  81.     pte.frame_address = ADDR2PFN((uintptr_t) start_info.shared_info);
  82.     xen_update_va_mapping(&shared_info, pte, UVMF_INVLPG);
  83.    
  84.     pte.present = 1;
  85.     pte.writeable = 1;
  86.     pte.frame_address = start_info.console_mfn;
  87.     xen_update_va_mapping(&console_page, pte, UVMF_INVLPG);
  88.    
  89.     xen_set_callbacks(XEN_CS, xen_callback, XEN_CS, xen_failsafe_callback);
  90.    
  91.     /* Create identity mapping */
  92.    
  93.     meminfo.start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.ptl0), PAGE_SIZE)) + start_info.pt_frames;
  94.     meminfo.size = start_info.frames - meminfo.start;
  95.     meminfo.reserved = 0;
  96.    
  97.     uintptr_t pa;
  98.     index_t last_ptl0 = 0;
  99.     for (pa = PFN2ADDR(meminfo.start); pa < PFN2ADDR(meminfo.start + meminfo.size); pa += FRAME_SIZE) {
  100.         uintptr_t va = PA2KA(pa);
  101.        
  102.         if ((PTL0_INDEX(va) != last_ptl0) && (GET_PTL1_FLAGS(start_info.ptl0, PTL0_INDEX(va)) & PAGE_NOT_PRESENT)) {
  103.             /* New page directory entry needed */
  104.             uintptr_t tpa = PFN2ADDR(meminfo.start + meminfo.reserved);
  105.             uintptr_t tva = PA2KA(tpa);
  106.            
  107.             memsetb(tva, PAGE_SIZE, 0);
  108.            
  109.             pte_t *tptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(tva)));
  110.             SET_FRAME_FLAGS(tptl3, PTL3_INDEX(tva), PAGE_PRESENT);
  111.             SET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va), tpa);
  112.            
  113.             last_ptl0 = PTL0_INDEX(va);
  114.             meminfo.reserved++;
  115.         }
  116.        
  117.         pte_t *ptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va)));
  118.        
  119.         SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(va), pa);
  120.         SET_FRAME_FLAGS(ptl3, PTL3_INDEX(va), PAGE_PRESENT | PAGE_WRITE);
  121.     }
  122.    
  123.     /* Put initial stack safely in the mapped area */
  124.     stack_safe = PA2KA(PFN2ADDR(meminfo.start + meminfo.reserved));
  125. }
  126.  
  127. void arch_pre_mm_init(void)
  128. {
  129.     pm_init();
  130.  
  131.     if (config.cpu_active == 1) {
  132.         interrupt_init();
  133. //      bios_init();
  134.        
  135.     }
  136. }
  137.  
  138. void arch_post_mm_init(void)
  139. {
  140.     if (config.cpu_active == 1) {
  141.         /* Initialize IRQ routing */
  142.         irq_init(IRQ_COUNT, IRQ_COUNT);
  143.        
  144.         /* Video */
  145.         xen_console_init();
  146.        
  147.         /* Enable debugger */
  148.         debugger_init();
  149.        
  150.         /* Merge all memory zones to 1 big zone */
  151.         zone_merge_all();
  152.     }
  153. }
  154.  
  155. void arch_post_cpu_init(void)
  156. {
  157. }
  158.  
  159. void arch_pre_smp_init(void)
  160. {
  161.     if (config.cpu_active == 1) {
  162.         memory_print_map();
  163.        
  164.         #ifdef CONFIG_SMP
  165.         acpi_init();
  166.         #endif /* CONFIG_SMP */
  167.     }
  168. }
  169.  
  170. void arch_post_smp_init(void)
  171. {
  172. }
  173.  
  174. void calibrate_delay_loop(void)
  175. {
  176. //  i8254_calibrate_delay_loop();
  177.     if (config.cpu_active == 1) {
  178.         /*
  179.          * This has to be done only on UP.
  180.          * On SMP, i8254 is not used for time keeping and its interrupt pin remains masked.
  181.          */
  182. //      i8254_normal_operation();
  183.     }
  184. }
  185.  
  186. /** Set thread-local-storage pointer
  187.  *
  188.  * TLS pointer is set in GS register. That means, the GS contains
  189.  * selector, and the descriptor->base is the correct address.
  190.  */
  191. unative_t sys_tls_set(unative_t addr)
  192. {
  193.     THREAD->arch.tls = addr;
  194.     set_tls_desc(addr);
  195.  
  196.     return 0;
  197. }
  198.  
  199. /** Acquire console back for kernel
  200.  *
  201.  */
  202. void arch_grab_console(void)
  203. {
  204. }
  205.  
  206. /** Return console to userspace
  207.  *
  208.  */
  209. void arch_release_console(void)
  210. {
  211. }
  212.  
  213. /** @}
  214.  */
  215.