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1 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1 jermar 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1705 cejka 29
/** @addtogroup ia32interrupt
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 * @{
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 */
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/** @file
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 */
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1 jermar 35
#include <arch/interrupt.h>
712 decky 36
#include <syscall/syscall.h>
1 jermar 37
#include <print.h>
68 decky 38
#include <debug.h>
1 jermar 39
#include <panic.h>
1477 decky 40
#include <arch/drivers/i8259.h>
1 jermar 41
#include <func.h>
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#include <cpu.h>
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#include <arch/asm.h>
5 jermar 44
#include <mm/tlb.h>
703 jermar 45
#include <mm/as.h>
22 jermar 46
#include <arch.h>
268 palkovsky 47
#include <symtab.h>
391 jermar 48
#include <proc/thread.h>
1256 jermar 49
#include <proc/task.h>
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#include <synch/spinlock.h>
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#include <arch/ddi/ddi.h>
1258 palkovsky 52
#include <ipc/sysipc.h>
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#include <interrupt.h>
1956 decky 54
#include <ddi/irq.h>
1 jermar 55
 
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/*
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 * Interrupt and exception dispatching.
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 */
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1780 jermar 60
void (* disable_irqs_function)(uint16_t irqmask) = NULL;
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void (* enable_irqs_function)(uint16_t irqmask) = NULL;
1 jermar 62
void (* eoi_function)(void) = NULL;
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1956 decky 64
void decode_istate(istate_t *istate)
1008 jermar 65
{
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    char *symbol = get_symtab_entry(istate->eip);
268 palkovsky 67
 
1008 jermar 68
    if (!symbol)
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        symbol = "";
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71
    if (CPU)
2439 decky 72
        printf("----------------EXCEPTION OCCURED (cpu%u)----------------\n", CPU->id);
1008 jermar 73
    else
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        printf("----------------EXCEPTION OCCURED----------------\n");
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2439 decky 76
    printf("%%eip: %#lx (%s)\n", istate->eip, symbol);
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    printf("ERROR_WORD=%#lx\n", istate->error_word);
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    printf("%%cs=%#lx,flags=%#lx\n", istate->cs, istate->eflags);
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    printf("%%eax=%#lx, %%ecx=%#lx, %%edx=%#lx, %%esp=%p\n", istate->eax, istate->ecx, istate->edx, &istate->stack[0]);
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    printf("stack: %#lx, %#lx, %#lx, %#lx\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]);
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    printf("       %#lx, %#lx, %#lx, %#lx\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]);
1008 jermar 82
}
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1956 decky 84
static void trap_virtual_eoi(void)
1 jermar 85
{
1956 decky 86
    if (eoi_function)
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        eoi_function();
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    else
3790 svoboda 89
        panic("No eoi_function.");
1956 decky 90
 
91
}
92
 
93
static void null_interrupt(int n, istate_t *istate)
94
{
3790 svoboda 95
    fault_if_from_uspace(istate, "Unserviced interrupt: %d.", n);
1595 palkovsky 96
 
1956 decky 97
    decode_istate(istate);
3790 svoboda 98
    panic("Unserviced interrupt: %d.", n);
1 jermar 99
}
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1256 jermar 101
/** General Protection Fault. */
2439 decky 102
static void gp_fault(int n __attribute__((unused)), istate_t *istate)
1 jermar 103
{
1256 jermar 104
    if (TASK) {
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        count_t ver;
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107
        spinlock_lock(&TASK->lock);
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        ver = TASK->arch.iomapver;
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        spinlock_unlock(&TASK->lock);
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        if (CPU->arch.iomapver_copy != ver) {
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            /*
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             * This fault can be caused by an early access
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             * to I/O port because of an out-dated
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             * I/O Permission bitmap installed on CPU.
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             * Install the fresh copy and restart
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             * the instruction.
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             */
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            io_perm_bitmap_install();
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            return;
121
        }
3790 svoboda 122
        fault_if_from_uspace(istate, "General protection fault.");
1256 jermar 123
    }
124
 
1956 decky 125
    decode_istate(istate);
3790 svoboda 126
    panic("General protection fault.");
1 jermar 127
}
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2439 decky 129
static void ss_fault(int n __attribute__((unused)), istate_t *istate)
84 vana 130
{
3790 svoboda 131
    fault_if_from_uspace(istate, "Stack fault.");
1595 palkovsky 132
 
1956 decky 133
    decode_istate(istate);
3790 svoboda 134
    panic("Stack fault.");
84 vana 135
}
136
 
2439 decky 137
static void simd_fp_exception(int n __attribute__((unused)), istate_t *istate)
1019 vana 138
{
1780 jermar 139
    uint32_t mxcsr;
2107 jermar 140
    asm (
4016 decky 141
        "stmxcsr %[mxcsr]\n"
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        : [mxcsr] "=m" (mxcsr)
1019 vana 143
    );
3790 svoboda 144
    fault_if_from_uspace(istate, "SIMD FP exception(19), MXCSR: %#zx.",
2439 decky 145
        (unative_t) mxcsr);
4016 decky 146
 
1956 decky 147
    decode_istate(istate);
2439 decky 148
    printf("MXCSR: %#lx\n", mxcsr);
3790 svoboda 149
    panic("SIMD FP exception(19).");
1019 vana 150
}
151
 
2439 decky 152
static void nm_fault(int n __attribute__((unused)), istate_t *istate __attribute__((unused)))
73 vana 153
{
458 decky 154
#ifdef CONFIG_FPU_LAZY     
309 palkovsky 155
    scheduler_fpu_lazy_request();
156
#else
3790 svoboda 157
    fault_if_from_uspace(istate, "FPU fault.");
158
    panic("FPU fault.");
309 palkovsky 159
#endif
73 vana 160
}
161
 
1956 decky 162
#ifdef CONFIG_SMP
2439 decky 163
static void tlb_shootdown_ipi(int n __attribute__((unused)), istate_t *istate __attribute__((unused)))
1 jermar 164
{
1956 decky 165
    trap_virtual_eoi();
166
    tlb_shootdown_ipi_recv();
1 jermar 167
}
1956 decky 168
#endif
1 jermar 169
 
1956 decky 170
/** Handler of IRQ exceptions */
2439 decky 171
static void irq_interrupt(int n, istate_t *istate __attribute__((unused)))
5 jermar 172
{
1956 decky 173
    ASSERT(n >= IVT_IRQBASE);
174
 
175
    int inum = n - IVT_IRQBASE;
2218 decky 176
    bool ack = false;
1956 decky 177
    ASSERT(inum < IRQ_COUNT);
178
    ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
2218 decky 179
 
1956 decky 180
    irq_t *irq = irq_dispatch_and_lock(inum);
181
    if (irq) {
182
        /*
183
         * The IRQ handler was found.
184
         */
2218 decky 185
 
186
        if (irq->preack) {
187
            /* Send EOI before processing the interrupt */
188
            trap_virtual_eoi();
189
            ack = true;
190
        }
3906 jermar 191
        irq->handler(irq);
1956 decky 192
        spinlock_unlock(&irq->lock);
193
    } else {
194
        /*
195
         * Spurious interrupt.
196
         */
197
#ifdef CONFIG_DEBUG
2439 decky 198
        printf("cpu%u: spurious interrupt (inum=%d)\n", CPU->id, inum);
1956 decky 199
#endif
200
    }
2218 decky 201
 
202
    if (!ack)
203
        trap_virtual_eoi();
5 jermar 204
}
205
 
1956 decky 206
void interrupt_init(void)
207
{
208
    int i;
209
 
210
    for (i = 0; i < IVT_ITEMS; i++)
211
        exc_register(i, "null", (iroutine) null_interrupt);
212
 
213
    for (i = 0; i < IRQ_COUNT; i++) {
214
        if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
215
            exc_register(IVT_IRQBASE + i, "irq", (iroutine) irq_interrupt);
216
    }
217
 
218
    exc_register(7, "nm_fault", (iroutine) nm_fault);
219
    exc_register(12, "ss_fault", (iroutine) ss_fault);
220
    exc_register(13, "gp_fault", (iroutine) gp_fault);
221
    exc_register(19, "simd_fp", (iroutine) simd_fp_exception);
222
 
223
#ifdef CONFIG_SMP
224
    exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown", (iroutine) tlb_shootdown_ipi);
225
#endif
226
}
227
 
1780 jermar 228
void trap_virtual_enable_irqs(uint16_t irqmask)
1 jermar 229
{
230
    if (enable_irqs_function)
231
        enable_irqs_function(irqmask);
232
    else
3790 svoboda 233
        panic("No enable_irqs_function.");
1 jermar 234
}
235
 
1780 jermar 236
void trap_virtual_disable_irqs(uint16_t irqmask)
1 jermar 237
{
238
    if (disable_irqs_function)
239
        disable_irqs_function(irqmask);
240
    else
3790 svoboda 241
        panic("No disable_irqs_function.");
1 jermar 242
}
243
 
1703 jermar 244
/** @}
1702 cejka 245
 */