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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  3.  * Copyright (C) 2005 Jakub Vana
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  *
  29.  */
  30.  
  31. #include <arch/interrupt.h>
  32. #include <panic.h>
  33. #include <print.h>
  34. #include <console/console.h>
  35. #include <arch/types.h>
  36. #include <arch/asm.h>
  37. #include <arch/barrier.h>
  38. #include <arch/register.h>
  39. #include <arch/drivers/it.h>
  40. #include <arch.h>
  41. #include <symtab.h>
  42. #include <debug.h>
  43. #include <syscall/syscall.h>
  44. #include <print.h>
  45. #include <proc/scheduler.h>
  46.  
  47. #define VECTORS_64_BUNDLE   20
  48. #define VECTORS_16_BUNDLE   48
  49. #define VECTORS_16_BUNDLE_START 0x5000
  50. #define VECTOR_MAX      0x7f00
  51.  
  52. #define BUNDLE_SIZE     16
  53.  
  54. char *vector_names_64_bundle[VECTORS_64_BUNDLE] = {
  55.     "VHPT Translation vector",
  56.     "Instruction TLB vector",
  57.     "Data TLB vector",
  58.     "Alternate Instruction TLB vector",
  59.     "Alternate Data TLB vector",
  60.     "Data Nested TLB vector",
  61.     "Instruction Key Miss vector",
  62.     "Data Key Miss vector",
  63.     "Dirty-Bit vector",
  64.     "Instruction Access-Bit vector",
  65.     "Data Access-Bit vector"
  66.     "Break Instruction vector",
  67.     "External Interrupt vector"
  68.     "Reserved",
  69.     "Reserved",
  70.     "Reserved",
  71.     "Reserved",
  72.     "Reserved",
  73.     "Reserved",
  74.     "Reserved"
  75. };
  76.  
  77. char *vector_names_16_bundle[VECTORS_16_BUNDLE] = {
  78.     "Page Not Present vector",
  79.     "Key Permission vector",
  80.     "Instruction Access rights vector",
  81.     "Data Access Rights vector",
  82.     "General Exception vector",
  83.     "Disabled FP-Register vector",
  84.     "NaT Consumption vector",
  85.     "Speculation vector",
  86.     "Reserved",
  87.     "Debug vector",
  88.     "Unaligned Reference vector",
  89.     "Unsupported Data Reference vector",
  90.     "Floating-point Fault vector",
  91.     "Floating-point Trap vector",
  92.     "Lower-Privilege Transfer Trap vector",
  93.     "Taken Branch Trap vector",
  94.     "Single STep Trap vector",
  95.     "Reserved",
  96.     "Reserved",
  97.     "Reserved",
  98.     "Reserved",
  99.     "Reserved",
  100.     "Reserved",
  101.     "Reserved",
  102.     "Reserved",
  103.     "IA-32 Exception vector",
  104.     "IA-32 Intercept vector",
  105.     "IA-32 Interrupt vector",
  106.     "Reserved",
  107.     "Reserved",
  108.     "Reserved"
  109. };
  110.  
  111. static char *vector_to_string(__u16 vector);
  112. static void dump_interrupted_context(istate_t *istate);
  113.  
  114. char *vector_to_string(__u16 vector)
  115. {
  116.     ASSERT(vector <= VECTOR_MAX);
  117.    
  118.     if (vector >= VECTORS_16_BUNDLE_START)
  119.         return vector_names_16_bundle[(vector-VECTORS_16_BUNDLE_START)/(16*BUNDLE_SIZE)];
  120.     else
  121.         return vector_names_64_bundle[vector/(64*BUNDLE_SIZE)];
  122. }
  123.  
  124. void dump_interrupted_context(istate_t *istate)
  125. {
  126.     char *ifa, *iipa, *iip;
  127.  
  128.     ifa = get_symtab_entry(istate->cr_ifa);
  129.     iipa = get_symtab_entry(istate->cr_iipa);
  130.     iip = get_symtab_entry(istate->cr_iip);
  131.  
  132.     putchar('\n');
  133.     printf("Interrupted context dump:\n");
  134.     printf("ar.bsp=%P\tar.bspstore=%P\n", istate->ar_bsp, istate->ar_bspstore);
  135.     printf("ar.rnat=%Q\tar.rsc=%Q\n", istate->ar_rnat, istate->ar_rsc);
  136.     printf("ar.ifs=%Q\tar.pfs=%Q\n", istate->ar_ifs, istate->ar_pfs);
  137.     printf("cr.isr=%Q\tcr.ipsr=%Q\t\n", istate->cr_isr.value, istate->cr_ipsr);
  138.    
  139.     printf("cr.iip=%Q, #%d\t(%s)\n", istate->cr_iip, istate->cr_isr.ei ,iip ? iip : "?");
  140.     printf("cr.iipa=%Q\t(%s)\n", istate->cr_iipa, iipa ? iipa : "?");
  141.     printf("cr.ifa=%Q\t(%s)\n", istate->cr_ifa, ifa ? ifa : "?");
  142. }
  143.  
  144. void general_exception(__u64 vector, istate_t *istate)
  145. {
  146.     char *desc = "";
  147.  
  148.     dump_interrupted_context(istate);
  149.  
  150.     switch (istate->cr_isr.ge_code) {
  151.         case GE_ILLEGALOP:
  152.         desc = "Illegal Operation fault";
  153.         break;
  154.         case GE_PRIVOP:
  155.         desc = "Privileged Operation fault";
  156.         break;
  157.         case GE_PRIVREG:
  158.         desc = "Privileged Register fault";
  159.         break;
  160.         case GE_RESREGFLD:
  161.         desc = "Reserved Register/Field fault";
  162.         break;
  163.         case GE_DISBLDISTRAN:
  164.         desc = "Disabled Instruction Set Transition fault";
  165.         break;
  166.         case GE_ILLEGALDEP:
  167.         desc = "Illegal Dependency fault";
  168.         break;
  169.         default:
  170.             desc = "unknown";
  171.         break;
  172.     }
  173.  
  174.     panic("General Exception (%s)\n", desc);
  175. }
  176.  
  177.  
  178. void disabled_fp_register(__u64 vector, istate_t *istate)
  179. {
  180. #ifdef CONFIG_CPU_LAZY
  181.     scheduler_fpu_lazy_request();  
  182. #endif
  183. }
  184.  
  185.  
  186. void nop_handler(__u64 vector, istate_t *istate)
  187. {
  188. }
  189.  
  190.  
  191.  
  192. /** Handle syscall. */
  193. int break_instruction(__u64 vector, istate_t *istate)
  194. {
  195.     /*
  196.      * Move to next instruction after BREAK.
  197.      */
  198.     if (istate->cr_ipsr.ri == 2) {
  199.         istate->cr_ipsr.ri = 0;
  200.         istate->cr_iip += 16;
  201.     } else {
  202.         istate->cr_ipsr.ri++;
  203.     }
  204.  
  205.     if (istate->in4 < SYSCALL_END)
  206.         return syscall_table[istate->in4](istate->in0, istate->in1, istate->in2, istate->in3);
  207.     else
  208.         panic("Undefined syscall %d", istate->in4);
  209.        
  210.     return -1;
  211. }
  212.  
  213. void universal_handler(__u64 vector, istate_t *istate)
  214. {
  215.     dump_interrupted_context(istate);
  216.     panic("Interruption: %W (%s)\n", (__u16) vector, vector_to_string(vector));
  217. }
  218.  
  219. void external_interrupt(__u64 vector, istate_t *istate)
  220. {
  221.     cr_ivr_t ivr;
  222.    
  223.     ivr.value = ivr_read();
  224.     srlz_d();
  225.  
  226.     switch(ivr.vector) {
  227.         case INTERRUPT_TIMER:
  228.         it_interrupt();
  229.             break;
  230.         case INTERRUPT_SPURIOUS:
  231.             printf("cpu%d: spurious interrupt\n", CPU->id);
  232.         break;
  233.         default:
  234.         panic("\nUnhandled External Interrupt Vector %d\n", ivr.vector);
  235.         break;
  236.     }
  237. }
  238.