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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  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 xen32
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch.h>
  36.  
  37. #include <arch/types.h>
  38. #include <typedefs.h>
  39. #include <align.h>
  40.  
  41. #include <arch/pm.h>
  42.  
  43. #include <arch/drivers/xconsole.h>
  44. #include <arch/mm/page.h>
  45.  
  46. #include <arch/context.h>
  47.  
  48. #include <config.h>
  49.  
  50. #include <arch/interrupt.h>
  51. #include <arch/asm.h>
  52. #include <genarch/acpi/acpi.h>
  53.  
  54. #include <arch/bios/bios.h>
  55.  
  56. #include <arch/boot/boot.h>
  57. #include <arch/mm/memory_init.h>
  58. #include <interrupt.h>
  59. #include <arch/debugger.h>
  60. #include <proc/thread.h>
  61. #include <syscall/syscall.h>
  62. #include <console/console.h>
  63.  
  64. start_info_t start_info;
  65. memzone_t meminfo;
  66.  
  67. extern void xen_callback(void);
  68. extern void xen_failsafe_callback(void);
  69.  
  70. void arch_pre_main(void)
  71. {
  72.     xen_vm_assist(VMASST_CMD_ENABLE, VMASST_TYPE_WRITABLE_PAGETABLES);
  73.    
  74.     pte_t pte;
  75.     memsetb((uintptr_t) &pte, sizeof(pte), 0);
  76.    
  77.     pte.present = 1;
  78.     pte.writeable = 1;
  79.     pte.frame_address = ADDR2PFN((uintptr_t) start_info.shared_info);
  80.     xen_update_va_mapping(&shared_info, pte, UVMF_INVLPG);
  81.    
  82.     pte.present = 1;
  83.     pte.writeable = 1;
  84.     pte.frame_address = start_info.console_mfn;
  85.     xen_update_va_mapping(&console_page, pte, UVMF_INVLPG);
  86.    
  87.     xen_set_callbacks(XEN_CS, xen_callback, XEN_CS, xen_failsafe_callback);
  88.    
  89.     /* Create identity mapping */
  90.    
  91.     meminfo.start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.ptl0), PAGE_SIZE)) + start_info.pt_frames;
  92.     meminfo.size = start_info.frames - meminfo.start;
  93.     meminfo.reserved = 0;
  94.    
  95.     uintptr_t pa;
  96.     index_t last_ptl0 = 0;
  97.     for (pa = PFN2ADDR(meminfo.start); pa < PFN2ADDR(meminfo.start + meminfo.size); pa += FRAME_SIZE) {
  98.         uintptr_t va = PA2KA(pa);
  99.        
  100.         if ((PTL0_INDEX(va) != last_ptl0) && (GET_PTL1_FLAGS(start_info.ptl0, PTL0_INDEX(va)) & PAGE_NOT_PRESENT)) {
  101.             /* New page directory entry needed */
  102.             uintptr_t tpa = PFN2ADDR(meminfo.start + meminfo.reserved);
  103.             uintptr_t tva = PA2KA(tpa);
  104.            
  105.             memsetb(tva, PAGE_SIZE, 0);
  106.            
  107.             pte_t *tptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(tva)));
  108.             SET_FRAME_FLAGS(tptl3, PTL3_INDEX(tva), PAGE_PRESENT);
  109.             SET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va), tpa);
  110.            
  111.             last_ptl0 = PTL0_INDEX(va);
  112.             meminfo.reserved++;
  113.         }
  114.        
  115.         pte_t *ptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va)));
  116.        
  117.         SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(va), pa);
  118.         SET_FRAME_FLAGS(ptl3, PTL3_INDEX(va), PAGE_PRESENT | PAGE_WRITE);
  119.     }
  120. }
  121.  
  122. void arch_pre_mm_init(void)
  123. {
  124.     pm_init();
  125.  
  126.     if (config.cpu_active == 1) {
  127. //      bios_init();
  128.        
  129.         exc_register(VECTOR_SYSCALL, "syscall", (iroutine) syscall);
  130.        
  131.         #ifdef CONFIG_SMP
  132.         exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
  133.                  (iroutine) tlb_shootdown_ipi);
  134.         #endif /* CONFIG_SMP */
  135.     }
  136. }
  137.  
  138. void arch_post_mm_init(void)
  139. {
  140.     if (config.cpu_active == 1) {
  141.         /* video */
  142.         xen_console_init();
  143.         /* Enable debugger */
  144.         debugger_init();
  145.         /* Merge all memory zones to 1 big zone */
  146.         zone_merge_all();
  147.     }
  148. }
  149.  
  150. void arch_pre_smp_init(void)
  151. {
  152.     if (config.cpu_active == 1) {
  153.         memory_print_map();
  154.        
  155.         #ifdef CONFIG_SMP
  156.         acpi_init();
  157.         #endif /* CONFIG_SMP */
  158.     }
  159. }
  160.  
  161. void arch_post_smp_init(void)
  162. {
  163. }
  164.  
  165. void calibrate_delay_loop(void)
  166. {
  167. //  i8254_calibrate_delay_loop();
  168.     if (config.cpu_active == 1) {
  169.         /*
  170.          * This has to be done only on UP.
  171.          * On SMP, i8254 is not used for time keeping and its interrupt pin remains masked.
  172.          */
  173. //      i8254_normal_operation();
  174.     }
  175. }
  176.  
  177. /** Set thread-local-storage pointer
  178.  *
  179.  * TLS pointer is set in GS register. That means, the GS contains
  180.  * selector, and the descriptor->base is the correct address.
  181.  */
  182. unative_t sys_tls_set(unative_t addr)
  183. {
  184.     THREAD->arch.tls = addr;
  185.     set_tls_desc(addr);
  186.  
  187.     return 0;
  188. }
  189.  
  190. /** Acquire console back for kernel
  191.  *
  192.  */
  193. void arch_grab_console(void)
  194. {
  195. }
  196.  
  197. /** Return console to userspace
  198.  *
  199.  */
  200. void arch_release_console(void)
  201. {
  202. }
  203.  
  204. /** @}
  205.  */
  206.