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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
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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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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>
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#include <symtab.h>
282 palkovsky 47
#include <arch/asm.h>
309 palkovsky 48
#include <proc/scheduler.h>
391 jermar 49
#include <proc/thread.h>
1256 jermar 50
#include <proc/task.h>
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#include <synch/spinlock.h>
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#include <arch/ddi/ddi.h>
1258 palkovsky 53
#include <interrupt.h>
1958 decky 54
#include <ddi/irq.h>
226 palkovsky 55
 
1958 decky 56
/*
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 * Interrupt and exception dispatching.
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 */
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60
void (* disable_irqs_function)(uint16_t irqmask) = NULL;
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void (* enable_irqs_function)(uint16_t irqmask) = NULL;
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void (* eoi_function)(void) = NULL;
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64
void decode_istate(int n, istate_t *istate)
297 palkovsky 65
{
66
    char *symbol;
1780 jermar 67
/*  uint64_t *x = &istate->stack[0]; */
297 palkovsky 68
 
2604 jermar 69
    if (!(symbol = get_symtab_entry(istate->rip)))
286 palkovsky 70
        symbol = "";
71
 
2604 jermar 72
    printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n", n, __func__);
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    printf("%%rip: %#llx (%s)\n", istate->rip, symbol);
1735 decky 74
    printf("ERROR_WORD=%#llx\n", istate->error_word);
2604 jermar 75
    printf("%%cs=%#llx, rflags=%#llx, %%cr0=%#llx\n", istate->cs,
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        istate->rflags, read_cr0());
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    printf("%%rax=%#llx, %%rcx=%#llx, %%rdx=%#llx\n", istate->rax,
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        istate->rcx, istate->rdx);
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    printf("%%rsi=%#llx, %%rdi=%#llx, %%r8=%#llx\n", istate->rsi,
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        istate->rdi, istate->r8);
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    printf("%%r9=%#llx, %%r10=%#llx, %%r11=%#llx\n", istate->r9,
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        istate->r10, istate->r11);
1735 decky 83
    printf("%%rsp=%#llx\n", &istate->stack[0]);
286 palkovsky 84
}
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1958 decky 86
static void trap_virtual_eoi(void)
87
{
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    if (eoi_function)
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        eoi_function();
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    else
3790 svoboda 91
        panic("No eoi_function.");
226 palkovsky 92
 
1958 decky 93
}
226 palkovsky 94
 
1958 decky 95
static void null_interrupt(int n, istate_t *istate)
226 palkovsky 96
{
3790 svoboda 97
    fault_if_from_uspace(istate, "Unserviced interrupt: %d.", n);
1958 decky 98
    decode_istate(n, istate);
3790 svoboda 99
    panic("Unserviced interrupt.");
226 palkovsky 100
}
101
 
1256 jermar 102
/** General Protection Fault. */
1958 decky 103
static void gp_fault(int n, istate_t *istate)
226 palkovsky 104
{
1256 jermar 105
    if (TASK) {
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        count_t ver;
107
 
108
        spinlock_lock(&TASK->lock);
109
        ver = TASK->arch.iomapver;
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        spinlock_unlock(&TASK->lock);
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112
        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;
122
        }
3790 svoboda 123
        fault_if_from_uspace(istate, "General protection fault.");
1256 jermar 124
    }
125
 
1958 decky 126
    decode_istate(n, istate);
3790 svoboda 127
    panic("General protection fault.");
226 palkovsky 128
}
129
 
1958 decky 130
static void ss_fault(int n, istate_t *istate)
226 palkovsky 131
{
3790 svoboda 132
    fault_if_from_uspace(istate, "Stack fault.");
1958 decky 133
    decode_istate(n, istate);
3790 svoboda 134
    panic("Stack fault.");
226 palkovsky 135
}
136
 
1958 decky 137
static void nm_fault(int n, istate_t *istate)
226 palkovsky 138
{
3880 decky 139
#ifdef CONFIG_FPU_LAZY
309 palkovsky 140
    scheduler_fpu_lazy_request();
141
#else
3790 svoboda 142
    fault_if_from_uspace(istate, "FPU fault.");
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    panic("FPU fault.");
309 palkovsky 144
#endif
226 palkovsky 145
}
146
 
3851 jermar 147
#ifdef CONFIG_SMP
1958 decky 148
static void tlb_shootdown_ipi(int n, istate_t *istate)
226 palkovsky 149
{
150
    trap_virtual_eoi();
151
    tlb_shootdown_ipi_recv();
152
}
3851 jermar 153
#endif
226 palkovsky 154
 
1958 decky 155
/** Handler of IRQ exceptions */
156
static void irq_interrupt(int n, istate_t *istate)
157
{
158
    ASSERT(n >= IVT_IRQBASE);
159
 
160
    int inum = n - IVT_IRQBASE;
2218 decky 161
    bool ack = false;
1958 decky 162
    ASSERT(inum < IRQ_COUNT);
163
    ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
2218 decky 164
 
1958 decky 165
    irq_t *irq = irq_dispatch_and_lock(inum);
166
    if (irq) {
167
        /*
168
         * The IRQ handler was found.
169
         */
2218 decky 170
 
171
        if (irq->preack) {
172
            /* Send EOI before processing the interrupt */
173
            trap_virtual_eoi();
174
            ack = true;
175
        }
1958 decky 176
        irq->handler(irq, irq->arg);
177
        spinlock_unlock(&irq->lock);
178
    } else {
179
        /*
180
         * Spurious interrupt.
181
         */
182
#ifdef CONFIG_DEBUG
183
        printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
184
#endif
185
    }
2218 decky 186
 
187
    if (!ack)
188
        trap_virtual_eoi();
1958 decky 189
}
190
 
191
void interrupt_init(void)
192
{
193
    int i;
194
 
195
    for (i = 0; i < IVT_ITEMS; i++)
196
        exc_register(i, "null", (iroutine) null_interrupt);
197
 
198
    for (i = 0; i < IRQ_COUNT; i++) {
199
        if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
2604 jermar 200
            exc_register(IVT_IRQBASE + i, "irq",
201
                (iroutine) irq_interrupt);
1958 decky 202
    }
203
 
204
    exc_register(7, "nm_fault", (iroutine) nm_fault);
205
    exc_register(12, "ss_fault", (iroutine) ss_fault);
206
    exc_register(13, "gp_fault", (iroutine) gp_fault);
207
    exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
208
 
209
#ifdef CONFIG_SMP
2604 jermar 210
    exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
211
        (iroutine) tlb_shootdown_ipi);
1958 decky 212
#endif
213
}
214
 
1780 jermar 215
void trap_virtual_enable_irqs(uint16_t irqmask)
226 palkovsky 216
{
217
    if (enable_irqs_function)
218
        enable_irqs_function(irqmask);
219
    else
3790 svoboda 220
        panic("No enable_irqs_function.");
226 palkovsky 221
}
222
 
1780 jermar 223
void trap_virtual_disable_irqs(uint16_t irqmask)
226 palkovsky 224
{
225
    if (disable_irqs_function)
226
        disable_irqs_function(irqmask);
227
    else
3790 svoboda 228
        panic("No disable_irqs_function.");
226 palkovsky 229
}
230
 
1888 jermar 231
/** @}
1702 cejka 232
 */