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1816 | decky | 1 | /* |
2 | * Copyright (C) 2006 Martin Decky |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup xen32interrupt |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
35 | #include <arch/interrupt.h> |
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36 | #include <syscall/syscall.h> |
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37 | #include <print.h> |
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38 | #include <debug.h> |
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39 | #include <panic.h> |
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40 | #include <func.h> |
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41 | #include <cpu.h> |
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42 | #include <arch/asm.h> |
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43 | #include <mm/tlb.h> |
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44 | #include <mm/as.h> |
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45 | #include <arch.h> |
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46 | #include <symtab.h> |
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47 | #include <proc/thread.h> |
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48 | #include <proc/task.h> |
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49 | #include <synch/spinlock.h> |
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50 | #include <arch/ddi/ddi.h> |
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51 | #include <ipc/sysipc.h> |
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52 | #include <interrupt.h> |
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53 | |||
54 | /* |
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55 | * Interrupt and exception dispatching. |
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56 | */ |
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57 | |||
58 | void (* disable_irqs_function)(uint16_t irqmask) = NULL; |
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59 | void (* enable_irqs_function)(uint16_t irqmask) = NULL; |
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60 | void (* eoi_function)(void) = NULL; |
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61 | |||
62 | void PRINT_INFO_ERRCODE(istate_t *istate) |
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63 | { |
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64 | char *symbol = get_symtab_entry(istate->eip); |
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65 | |||
66 | if (!symbol) |
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67 | symbol = ""; |
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68 | |||
69 | if (CPU) |
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70 | printf("----------------EXCEPTION OCCURED (cpu%d)----------------\n", CPU->id); |
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71 | else |
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72 | printf("----------------EXCEPTION OCCURED----------------\n"); |
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73 | |||
74 | printf("%%eip: %#x (%s)\n",istate->eip,symbol); |
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75 | printf("ERROR_WORD=%#x\n", istate->error_word); |
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76 | printf("%%cs=%#x,flags=%#x\n", istate->cs, istate->eflags); |
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77 | printf("%%eax=%#x, %%ecx=%#x, %%edx=%#x, %%esp=%#x\n", istate->eax,istate->ecx,istate->edx,&istate->stack[0]); |
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78 | #ifdef CONFIG_DEBUG_ALLREGS |
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79 | printf("%%esi=%#x, %%edi=%#x, %%ebp=%#x, %%ebx=%#x\n", istate->esi,istate->edi,istate->ebp,istate->ebx); |
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80 | #endif |
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81 | printf("stack: %#x, %#x, %#x, %#x\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]); |
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82 | printf(" %#x, %#x, %#x, %#x\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]); |
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83 | } |
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84 | |||
85 | void null_interrupt(int n, istate_t *istate) |
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86 | { |
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87 | fault_if_from_uspace(istate, "unserviced interrupt: %d", n); |
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88 | |||
89 | PRINT_INFO_ERRCODE(istate); |
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90 | panic("unserviced interrupt: %d\n", n); |
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91 | } |
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92 | |||
93 | /** General Protection Fault. */ |
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94 | void gp_fault(int n, istate_t *istate) |
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95 | { |
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96 | if (TASK) { |
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97 | count_t ver; |
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98 | |||
99 | spinlock_lock(&TASK->lock); |
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100 | ver = TASK->arch.iomapver; |
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101 | spinlock_unlock(&TASK->lock); |
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102 | |||
103 | if (CPU->arch.iomapver_copy != ver) { |
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104 | /* |
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105 | * This fault can be caused by an early access |
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106 | * to I/O port because of an out-dated |
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107 | * I/O Permission bitmap installed on CPU. |
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108 | * Install the fresh copy and restart |
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109 | * the instruction. |
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110 | */ |
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111 | io_perm_bitmap_install(); |
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112 | return; |
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113 | } |
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114 | fault_if_from_uspace(istate, "general protection fault"); |
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115 | } |
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116 | |||
117 | PRINT_INFO_ERRCODE(istate); |
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118 | panic("general protection fault\n"); |
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119 | } |
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120 | |||
121 | void ss_fault(int n, istate_t *istate) |
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122 | { |
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123 | fault_if_from_uspace(istate, "stack fault"); |
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124 | |||
125 | PRINT_INFO_ERRCODE(istate); |
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126 | panic("stack fault\n"); |
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127 | } |
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128 | |||
129 | void simd_fp_exception(int n, istate_t *istate) |
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130 | { |
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131 | uint32_t mxcsr; |
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132 | asm |
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133 | ( |
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134 | "stmxcsr %0;\n" |
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135 | :"=m"(mxcsr) |
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136 | ); |
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137 | fault_if_from_uspace(istate, "SIMD FP exception(19), MXCSR: %#zx", |
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138 | (unative_t)mxcsr); |
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139 | |||
140 | PRINT_INFO_ERRCODE(istate); |
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141 | printf("MXCSR: %#zx\n",(unative_t)(mxcsr)); |
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142 | panic("SIMD FP exception(19)\n"); |
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143 | } |
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144 | |||
145 | void nm_fault(int n, istate_t *istate) |
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146 | { |
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147 | #ifdef CONFIG_FPU_LAZY |
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148 | scheduler_fpu_lazy_request(); |
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149 | #else |
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150 | fault_if_from_uspace(istate, "fpu fault"); |
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151 | panic("fpu fault"); |
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152 | #endif |
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153 | } |
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154 | |||
155 | void syscall(int n, istate_t *istate) |
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156 | { |
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157 | panic("Obsolete syscall handler."); |
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158 | } |
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159 | |||
160 | void tlb_shootdown_ipi(int n, istate_t *istate) |
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161 | { |
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162 | trap_virtual_eoi(); |
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163 | tlb_shootdown_ipi_recv(); |
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164 | } |
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165 | |||
166 | void trap_virtual_enable_irqs(uint16_t irqmask) |
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167 | { |
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168 | if (enable_irqs_function) |
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169 | enable_irqs_function(irqmask); |
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170 | else |
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171 | panic("no enable_irqs_function\n"); |
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172 | } |
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173 | |||
174 | void trap_virtual_disable_irqs(uint16_t irqmask) |
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175 | { |
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176 | if (disable_irqs_function) |
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177 | disable_irqs_function(irqmask); |
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178 | else |
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179 | panic("no disable_irqs_function\n"); |
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180 | } |
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181 | |||
182 | void trap_virtual_eoi(void) |
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183 | { |
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184 | if (eoi_function) |
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185 | eoi_function(); |
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186 | else |
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187 | panic("no eoi_function\n"); |
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188 | |||
189 | } |
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190 | |||
191 | static void ipc_int(int n, istate_t *istate) |
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192 | { |
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193 | ipc_irq_send_notif(n-IVT_IRQBASE); |
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194 | trap_virtual_eoi(); |
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195 | } |
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196 | |||
197 | |||
198 | /* Reregister irq to be IPC-ready */ |
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199 | void irq_ipc_bind_arch(unative_t irq) |
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200 | { |
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201 | if (irq == IRQ_CLK) |
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202 | return; |
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203 | exc_register(IVT_IRQBASE+irq, "ipc_int", ipc_int); |
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204 | trap_virtual_enable_irqs(1 << irq); |
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205 | } |
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206 | |||
207 | /** @} |
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208 | */ |
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209 |