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1816 | decky | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2006 Martin Decky |
1816 | decky | 3 | * All rights reserved. |
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 | |||
1952 | jermar | 29 | /** @addtogroup ia32xen_interrupt |
1816 | decky | 30 | * @{ |
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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1959 | decky | 53 | #include <ddi/irq.h> |
1816 | decky | 54 | |
55 | /* |
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56 | * Interrupt and exception dispatching. |
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57 | */ |
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58 | |||
59 | void (* disable_irqs_function)(uint16_t irqmask) = NULL; |
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60 | void (* enable_irqs_function)(uint16_t irqmask) = NULL; |
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61 | void (* eoi_function)(void) = NULL; |
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62 | |||
1959 | decky | 63 | void decode_istate(istate_t *istate) |
1816 | decky | 64 | { |
65 | char *symbol = get_symtab_entry(istate->eip); |
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66 | |||
67 | if (!symbol) |
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68 | symbol = ""; |
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69 | |||
70 | if (CPU) |
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71 | printf("----------------EXCEPTION OCCURED (cpu%d)----------------\n", CPU->id); |
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72 | else |
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73 | printf("----------------EXCEPTION OCCURED----------------\n"); |
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74 | |||
75 | printf("%%eip: %#x (%s)\n",istate->eip,symbol); |
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76 | printf("ERROR_WORD=%#x\n", istate->error_word); |
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77 | printf("%%cs=%#x,flags=%#x\n", istate->cs, istate->eflags); |
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78 | printf("%%eax=%#x, %%ecx=%#x, %%edx=%#x, %%esp=%#x\n", istate->eax,istate->ecx,istate->edx,&istate->stack[0]); |
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79 | #ifdef CONFIG_DEBUG_ALLREGS |
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80 | printf("%%esi=%#x, %%edi=%#x, %%ebp=%#x, %%ebx=%#x\n", istate->esi,istate->edi,istate->ebp,istate->ebx); |
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81 | #endif |
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82 | printf("stack: %#x, %#x, %#x, %#x\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]); |
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83 | printf(" %#x, %#x, %#x, %#x\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]); |
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84 | } |
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85 | |||
1959 | decky | 86 | static void trap_virtual_eoi(void) |
1816 | decky | 87 | { |
1959 | decky | 88 | if (eoi_function) |
89 | eoi_function(); |
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90 | else |
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91 | panic("no eoi_function\n"); |
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92 | |||
93 | } |
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94 | |||
95 | static void null_interrupt(int n, istate_t *istate) |
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96 | { |
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1816 | decky | 97 | fault_if_from_uspace(istate, "unserviced interrupt: %d", n); |
98 | |||
1959 | decky | 99 | decode_istate(istate); |
1816 | decky | 100 | panic("unserviced interrupt: %d\n", n); |
101 | } |
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102 | |||
103 | /** General Protection Fault. */ |
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1959 | decky | 104 | static void gp_fault(int n, istate_t *istate) |
1816 | decky | 105 | { |
106 | if (TASK) { |
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107 | count_t ver; |
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108 | |||
109 | spinlock_lock(&TASK->lock); |
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110 | ver = TASK->arch.iomapver; |
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111 | spinlock_unlock(&TASK->lock); |
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112 | |||
113 | if (CPU->arch.iomapver_copy != ver) { |
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114 | /* |
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115 | * This fault can be caused by an early access |
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116 | * to I/O port because of an out-dated |
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117 | * I/O Permission bitmap installed on CPU. |
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118 | * Install the fresh copy and restart |
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119 | * the instruction. |
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120 | */ |
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121 | io_perm_bitmap_install(); |
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122 | return; |
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123 | } |
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124 | fault_if_from_uspace(istate, "general protection fault"); |
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125 | } |
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126 | |||
1959 | decky | 127 | decode_istate(istate); |
1816 | decky | 128 | panic("general protection fault\n"); |
129 | } |
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130 | |||
1959 | decky | 131 | static void ss_fault(int n, istate_t *istate) |
1816 | decky | 132 | { |
133 | fault_if_from_uspace(istate, "stack fault"); |
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134 | |||
1959 | decky | 135 | decode_istate(istate); |
1816 | decky | 136 | panic("stack fault\n"); |
137 | } |
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138 | |||
1959 | decky | 139 | static void simd_fp_exception(int n, istate_t *istate) |
1816 | decky | 140 | { |
141 | uint32_t mxcsr; |
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142 | asm |
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143 | ( |
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144 | "stmxcsr %0;\n" |
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145 | :"=m"(mxcsr) |
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146 | ); |
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147 | fault_if_from_uspace(istate, "SIMD FP exception(19), MXCSR: %#zx", |
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148 | (unative_t)mxcsr); |
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149 | |||
1959 | decky | 150 | decode_istate(istate); |
1816 | decky | 151 | printf("MXCSR: %#zx\n",(unative_t)(mxcsr)); |
152 | panic("SIMD FP exception(19)\n"); |
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153 | } |
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154 | |||
1959 | decky | 155 | static void nm_fault(int n, istate_t *istate) |
1816 | decky | 156 | { |
157 | #ifdef CONFIG_FPU_LAZY |
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158 | scheduler_fpu_lazy_request(); |
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159 | #else |
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160 | fault_if_from_uspace(istate, "fpu fault"); |
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161 | panic("fpu fault"); |
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162 | #endif |
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163 | } |
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164 | |||
1959 | decky | 165 | #ifdef CONFIG_SMP |
166 | static void tlb_shootdown_ipi(int n, istate_t *istate) |
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1816 | decky | 167 | { |
1959 | decky | 168 | trap_virtual_eoi(); |
169 | tlb_shootdown_ipi_recv(); |
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1816 | decky | 170 | } |
1959 | decky | 171 | #endif |
1816 | decky | 172 | |
1959 | decky | 173 | /** Handler of IRQ exceptions */ |
174 | static void irq_interrupt(int n, istate_t *istate) |
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1816 | decky | 175 | { |
1959 | decky | 176 | ASSERT(n >= IVT_IRQBASE); |
177 | |||
178 | int inum = n - IVT_IRQBASE; |
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179 | ASSERT(inum < IRQ_COUNT); |
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180 | ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1)); |
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181 | |||
182 | irq_t *irq = irq_dispatch_and_lock(inum); |
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183 | if (irq) { |
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184 | /* |
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185 | * The IRQ handler was found. |
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186 | */ |
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187 | irq->handler(irq, irq->arg); |
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188 | spinlock_unlock(&irq->lock); |
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189 | } else { |
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190 | /* |
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191 | * Spurious interrupt. |
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192 | */ |
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193 | #ifdef CONFIG_DEBUG |
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194 | printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum); |
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195 | #endif |
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196 | } |
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1816 | decky | 197 | trap_virtual_eoi(); |
198 | } |
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199 | |||
1959 | decky | 200 | void interrupt_init(void) |
201 | { |
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202 | int i; |
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203 | |||
204 | for (i = 0; i < IVT_ITEMS; i++) |
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205 | exc_register(i, "null", (iroutine) null_interrupt); |
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206 | |||
207 | for (i = 0; i < IRQ_COUNT; i++) { |
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208 | if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1)) |
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209 | exc_register(IVT_IRQBASE + i, "irq", (iroutine) irq_interrupt); |
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210 | } |
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211 | |||
212 | exc_register(7, "nm_fault", (iroutine) nm_fault); |
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213 | exc_register(12, "ss_fault", (iroutine) ss_fault); |
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214 | exc_register(13, "gp_fault", (iroutine) gp_fault); |
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215 | exc_register(19, "simd_fp", (iroutine) simd_fp_exception); |
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216 | |||
217 | #ifdef CONFIG_SMP |
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218 | exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown", (iroutine) tlb_shootdown_ipi); |
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219 | #endif |
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220 | } |
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221 | |||
1816 | decky | 222 | void trap_virtual_enable_irqs(uint16_t irqmask) |
223 | { |
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224 | if (enable_irqs_function) |
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225 | enable_irqs_function(irqmask); |
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226 | else |
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227 | panic("no enable_irqs_function\n"); |
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228 | } |
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229 | |||
230 | void trap_virtual_disable_irqs(uint16_t irqmask) |
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231 | { |
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232 | if (disable_irqs_function) |
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233 | disable_irqs_function(irqmask); |
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234 | else |
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235 | panic("no disable_irqs_function\n"); |
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236 | } |
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237 | |||
238 | /** @} |
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239 | */ |