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226 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
226 palkovsky 3
 * All rights reserved.
4
 *
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 * Redistribution and use in source and binary forms, with or without
6
 * 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
15
 *   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
19
 * 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
25
 * (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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1888 jermar 29
/** @addtogroup amd64interrupt
1702 cejka 30
 * @{
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 */
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/** @file
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 */
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226 palkovsky 35
#include <arch/interrupt.h>
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#include <print.h>
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#include <debug.h>
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#include <panic.h>
1477 decky 39
#include <arch/drivers/i8259.h>
226 palkovsky 40
#include <func.h>
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#include <cpu.h>
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#include <arch/asm.h>
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#include <mm/tlb.h>
703 jermar 44
#include <mm/as.h>
226 palkovsky 45
#include <arch.h>
282 palkovsky 46
#include <arch/asm.h>
309 palkovsky 47
#include <proc/scheduler.h>
391 jermar 48
#include <proc/thread.h>
1256 jermar 49
#include <proc/task.h>
50
#include <synch/spinlock.h>
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#include <arch/ddi/ddi.h>
1258 palkovsky 52
#include <interrupt.h>
1958 decky 53
#include <ddi/irq.h>
4377 svoboda 54
#include <symtab.h>
226 palkovsky 55
 
1958 decky 56
/*
57
 * Interrupt and exception dispatching.
58
 */
59
 
60
void (* disable_irqs_function)(uint16_t irqmask) = NULL;
61
void (* enable_irqs_function)(uint16_t irqmask) = NULL;
62
void (* eoi_function)(void) = NULL;
63
 
64
void decode_istate(int n, istate_t *istate)
297 palkovsky 65
{
66
    char *symbol;
67
 
4377 svoboda 68
    symbol = symtab_fmt_name_lookup(istate->rip);
286 palkovsky 69
 
2604 jermar 70
    printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n", n, __func__);
71
    printf("%%rip: %#llx (%s)\n", istate->rip, symbol);
1735 decky 72
    printf("ERROR_WORD=%#llx\n", istate->error_word);
2604 jermar 73
    printf("%%cs=%#llx, rflags=%#llx, %%cr0=%#llx\n", istate->cs,
74
        istate->rflags, read_cr0());
75
    printf("%%rax=%#llx, %%rcx=%#llx, %%rdx=%#llx\n", istate->rax,
76
        istate->rcx, istate->rdx);
77
    printf("%%rsi=%#llx, %%rdi=%#llx, %%r8=%#llx\n", istate->rsi,
78
        istate->rdi, istate->r8);
79
    printf("%%r9=%#llx, %%r10=%#llx, %%r11=%#llx\n", istate->r9,
80
        istate->r10, istate->r11);
1735 decky 81
    printf("%%rsp=%#llx\n", &istate->stack[0]);
286 palkovsky 82
}
83
 
1958 decky 84
static void trap_virtual_eoi(void)
85
{
86
    if (eoi_function)
87
        eoi_function();
88
    else
4377 svoboda 89
        panic("No eoi_function.");
226 palkovsky 90
 
1958 decky 91
}
226 palkovsky 92
 
1958 decky 93
static void null_interrupt(int n, istate_t *istate)
226 palkovsky 94
{
4377 svoboda 95
    fault_if_from_uspace(istate, "Unserviced interrupt: %d.", n);
1958 decky 96
    decode_istate(n, istate);
4377 svoboda 97
    panic("Unserviced interrupt.");
226 palkovsky 98
}
99
 
1256 jermar 100
/** General Protection Fault. */
1958 decky 101
static void gp_fault(int n, istate_t *istate)
226 palkovsky 102
{
1256 jermar 103
    if (TASK) {
4692 svoboda 104
        size_t ver;
1256 jermar 105
 
106
        spinlock_lock(&TASK->lock);
107
        ver = TASK->arch.iomapver;
108
        spinlock_unlock(&TASK->lock);
109
 
110
        if (CPU->arch.iomapver_copy != ver) {
111
            /*
112
             * This fault can be caused by an early access
113
             * to I/O port because of an out-dated
114
             * I/O Permission bitmap installed on CPU.
115
             * Install the fresh copy and restart
116
             * the instruction.
117
             */
118
            io_perm_bitmap_install();
119
            return;
120
        }
4377 svoboda 121
        fault_if_from_uspace(istate, "General protection fault.");
1256 jermar 122
    }
123
 
1958 decky 124
    decode_istate(n, istate);
4377 svoboda 125
    panic("General protection fault.");
226 palkovsky 126
}
127
 
1958 decky 128
static void ss_fault(int n, istate_t *istate)
226 palkovsky 129
{
4377 svoboda 130
    fault_if_from_uspace(istate, "Stack fault.");
1958 decky 131
    decode_istate(n, istate);
4377 svoboda 132
    panic("Stack fault.");
226 palkovsky 133
}
134
 
1958 decky 135
static void nm_fault(int n, istate_t *istate)
226 palkovsky 136
{
4377 svoboda 137
#ifdef CONFIG_FPU_LAZY
309 palkovsky 138
    scheduler_fpu_lazy_request();
139
#else
4377 svoboda 140
    fault_if_from_uspace(istate, "FPU fault.");
141
    panic("FPU fault.");
309 palkovsky 142
#endif
226 palkovsky 143
}
144
 
4377 svoboda 145
#ifdef CONFIG_SMP
1958 decky 146
static void tlb_shootdown_ipi(int n, istate_t *istate)
226 palkovsky 147
{
148
    trap_virtual_eoi();
149
    tlb_shootdown_ipi_recv();
150
}
4377 svoboda 151
#endif
226 palkovsky 152
 
1958 decky 153
/** Handler of IRQ exceptions */
154
static void irq_interrupt(int n, istate_t *istate)
155
{
156
    ASSERT(n >= IVT_IRQBASE);
157
 
158
    int inum = n - IVT_IRQBASE;
2218 decky 159
    bool ack = false;
1958 decky 160
    ASSERT(inum < IRQ_COUNT);
161
    ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
2218 decky 162
 
1958 decky 163
    irq_t *irq = irq_dispatch_and_lock(inum);
164
    if (irq) {
165
        /*
166
         * The IRQ handler was found.
167
         */
2218 decky 168
 
169
        if (irq->preack) {
170
            /* Send EOI before processing the interrupt */
171
            trap_virtual_eoi();
172
            ack = true;
173
        }
4377 svoboda 174
        irq->handler(irq);
1958 decky 175
        spinlock_unlock(&irq->lock);
176
    } else {
177
        /*
178
         * Spurious interrupt.
179
         */
180
#ifdef CONFIG_DEBUG
181
        printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
182
#endif
183
    }
2218 decky 184
 
185
    if (!ack)
186
        trap_virtual_eoi();
1958 decky 187
}
188
 
189
void interrupt_init(void)
190
{
191
    int i;
192
 
193
    for (i = 0; i < IVT_ITEMS; i++)
194
        exc_register(i, "null", (iroutine) null_interrupt);
195
 
196
    for (i = 0; i < IRQ_COUNT; i++) {
197
        if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
2604 jermar 198
            exc_register(IVT_IRQBASE + i, "irq",
199
                (iroutine) irq_interrupt);
1958 decky 200
    }
201
 
202
    exc_register(7, "nm_fault", (iroutine) nm_fault);
203
    exc_register(12, "ss_fault", (iroutine) ss_fault);
204
    exc_register(13, "gp_fault", (iroutine) gp_fault);
205
    exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
206
 
207
#ifdef CONFIG_SMP
2604 jermar 208
    exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
209
        (iroutine) tlb_shootdown_ipi);
1958 decky 210
#endif
211
}
212
 
1780 jermar 213
void trap_virtual_enable_irqs(uint16_t irqmask)
226 palkovsky 214
{
215
    if (enable_irqs_function)
216
        enable_irqs_function(irqmask);
217
    else
4377 svoboda 218
        panic("No enable_irqs_function.");
226 palkovsky 219
}
220
 
1780 jermar 221
void trap_virtual_disable_irqs(uint16_t irqmask)
226 palkovsky 222
{
223
    if (disable_irqs_function)
224
        disable_irqs_function(irqmask);
225
    else
4377 svoboda 226
        panic("No disable_irqs_function.");
226 palkovsky 227
}
228
 
1888 jermar 229
/** @}
1702 cejka 230
 */