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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 <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 <interrupt.h>
  57. #include <arch/debugger.h>
  58. #include <proc/thread.h>
  59. #include <syscall/syscall.h>
  60. #include <console/console.h>
  61. #include <ddi/irq.h>
  62.  
  63. start_info_t start_info;
  64. memzone_t meminfo;
  65.  
  66. extern void xen_callback(void);
  67. extern void xen_failsafe_callback(void);
  68.  
  69. void arch_pre_main(void)
  70. {
  71.     pte_t pte;
  72.     memsetb(&pte, sizeof(pte), 0);
  73.    
  74.     pte.present = 1;
  75.     pte.writeable = 1;
  76.     pte.frame_address = ADDR2PFN((uintptr_t) start_info.shared_info);
  77.     ASSERT(xen_update_va_mapping(&shared_info, pte, UVMF_INVLPG) == 0);
  78.    
  79.     if (!(start_info.flags & SIF_INITDOMAIN)) {
  80.         /* Map console frame */
  81.         pte.present = 1;
  82.         pte.writeable = 1;
  83.         pte.frame_address = start_info.console.domU.mfn;
  84.         ASSERT(xen_update_va_mapping(&console_page, pte, UVMF_INVLPG) == 0);
  85.     } else
  86.         start_info.console.domU.evtchn = 0;
  87.    
  88.     ASSERT(xen_set_callbacks(XEN_CS, xen_callback, XEN_CS, xen_failsafe_callback) == 0);
  89.    
  90.     /* Create identity mapping */
  91.    
  92.     meminfo.start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.ptl0), PAGE_SIZE)) + start_info.pt_frames;
  93.     meminfo.size = start_info.frames - meminfo.start;
  94.     meminfo.reserved = 0;
  95.  
  96.     uintptr_t pa;
  97.     index_t last_ptl0 = 0;
  98.     for (pa = PFN2ADDR(meminfo.start); pa < PFN2ADDR(meminfo.start + meminfo.size); pa += FRAME_SIZE) {
  99.         uintptr_t va = PA2KA(pa);
  100.        
  101.         if ((PTL0_INDEX(va) != last_ptl0) && (GET_PTL1_FLAGS(start_info.ptl0, PTL0_INDEX(va)) & PAGE_NOT_PRESENT)) {
  102.             /* New page directory entry needed */
  103.             uintptr_t tpa = PFN2ADDR(meminfo.start + meminfo.reserved);
  104.             uintptr_t tva = PA2KA(tpa);
  105.            
  106.             memsetb((void *) tva, PAGE_SIZE, 0);
  107.            
  108.             pte_t *tptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(tva)));
  109.             SET_FRAME_ADDRESS(tptl3, PTL3_INDEX(tva), 0);
  110.             SET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va), tpa);
  111.             SET_FRAME_ADDRESS(tptl3, PTL3_INDEX(tva), 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. #ifdef CONFIG_SMP
  163.         acpi_init();
  164. #endif /* CONFIG_SMP */
  165.     }
  166. }
  167.  
  168. void arch_post_smp_init(void)
  169. {
  170. }
  171.  
  172. void calibrate_delay_loop(void)
  173. {
  174. //  i8254_calibrate_delay_loop();
  175.     if (config.cpu_active == 1) {
  176.         /*
  177.          * This has to be done only on UP.
  178.          * On SMP, i8254 is not used for time keeping and its interrupt pin remains masked.
  179.          */
  180. //      i8254_normal_operation();
  181.     }
  182. }
  183.  
  184. /** Set thread-local-storage pointer
  185.  *
  186.  * TLS pointer is set in GS register. That means, the GS contains
  187.  * selector, and the descriptor->base is the correct address.
  188.  */
  189. unative_t sys_tls_set(unative_t addr)
  190. {
  191.     THREAD->arch.tls = addr;
  192.     set_tls_desc(addr);
  193.  
  194.     return 0;
  195. }
  196.  
  197. /** Acquire console back for kernel
  198.  *
  199.  */
  200. void arch_grab_console(void)
  201. {
  202. }
  203.  
  204. /** Return console to userspace
  205.  *
  206.  */
  207. void arch_release_console(void)
  208. {
  209. }
  210.  
  211. void arch_reboot(void)
  212. {
  213.     // TODO
  214.     while (1);
  215. }
  216.  
  217. /** @}
  218.  */
  219.