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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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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);
1100 palkovsky 83
#ifdef CONFIG_DEBUG_ALLREGS 
2604 jermar 84
    printf("%%r12=%#llx, %%r13=%#llx, %%r14=%#llx\n", istate->r12,
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        istate->r13, istate->r14);
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    printf("%%r15=%#llx, %%rbx=%#llx, %%rbp=%#llx\n", istate->r15,
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        istate->rbx, &istate->rbp);
1100 palkovsky 88
#endif
1735 decky 89
    printf("%%rsp=%#llx\n", &istate->stack[0]);
286 palkovsky 90
}
91
 
1958 decky 92
static void trap_virtual_eoi(void)
93
{
94
    if (eoi_function)
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        eoi_function();
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    else
97
        panic("no eoi_function\n");
226 palkovsky 98
 
1958 decky 99
}
226 palkovsky 100
 
1958 decky 101
static void null_interrupt(int n, istate_t *istate)
226 palkovsky 102
{
1595 palkovsky 103
    fault_if_from_uspace(istate, "unserviced interrupt: %d", n);
1958 decky 104
    decode_istate(n, istate);
226 palkovsky 105
    panic("unserviced interrupt\n");
106
}
107
 
1256 jermar 108
/** General Protection Fault. */
1958 decky 109
static void gp_fault(int n, istate_t *istate)
226 palkovsky 110
{
1256 jermar 111
    if (TASK) {
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        count_t ver;
113
 
114
        spinlock_lock(&TASK->lock);
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        ver = TASK->arch.iomapver;
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        spinlock_unlock(&TASK->lock);
117
 
118
        if (CPU->arch.iomapver_copy != ver) {
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            /*
120
             * 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;
128
        }
1595 palkovsky 129
        fault_if_from_uspace(istate, "general protection fault");
1256 jermar 130
    }
131
 
1958 decky 132
    decode_istate(n, istate);
226 palkovsky 133
    panic("general protection fault\n");
134
}
135
 
1958 decky 136
static void ss_fault(int n, istate_t *istate)
226 palkovsky 137
{
1595 palkovsky 138
    fault_if_from_uspace(istate, "stack fault");
1958 decky 139
    decode_istate(n, istate);
226 palkovsky 140
    panic("stack fault\n");
141
}
142
 
1958 decky 143
static void nm_fault(int n, istate_t *istate)
226 palkovsky 144
{
458 decky 145
#ifdef CONFIG_FPU_LAZY     
309 palkovsky 146
    scheduler_fpu_lazy_request();
147
#else
1595 palkovsky 148
    fault_if_from_uspace(istate, "fpu fault");
309 palkovsky 149
    panic("fpu fault");
150
#endif
226 palkovsky 151
}
152
 
1958 decky 153
static void tlb_shootdown_ipi(int n, istate_t *istate)
226 palkovsky 154
{
155
    trap_virtual_eoi();
156
    tlb_shootdown_ipi_recv();
157
}
158
 
1958 decky 159
/** Handler of IRQ exceptions */
160
static void irq_interrupt(int n, istate_t *istate)
161
{
162
    ASSERT(n >= IVT_IRQBASE);
163
 
164
    int inum = n - IVT_IRQBASE;
2218 decky 165
    bool ack = false;
1958 decky 166
    ASSERT(inum < IRQ_COUNT);
167
    ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
2218 decky 168
 
1958 decky 169
    irq_t *irq = irq_dispatch_and_lock(inum);
170
    if (irq) {
171
        /*
172
         * The IRQ handler was found.
173
         */
2218 decky 174
 
175
        if (irq->preack) {
176
            /* Send EOI before processing the interrupt */
177
            trap_virtual_eoi();
178
            ack = true;
179
        }
1958 decky 180
        irq->handler(irq, irq->arg);
181
        spinlock_unlock(&irq->lock);
182
    } else {
183
        /*
184
         * Spurious interrupt.
185
         */
186
#ifdef CONFIG_DEBUG
187
        printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
188
#endif
189
    }
2218 decky 190
 
191
    if (!ack)
192
        trap_virtual_eoi();
1958 decky 193
}
194
 
195
void interrupt_init(void)
196
{
197
    int i;
198
 
199
    for (i = 0; i < IVT_ITEMS; i++)
200
        exc_register(i, "null", (iroutine) null_interrupt);
201
 
202
    for (i = 0; i < IRQ_COUNT; i++) {
203
        if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
2604 jermar 204
            exc_register(IVT_IRQBASE + i, "irq",
205
                (iroutine) irq_interrupt);
1958 decky 206
    }
207
 
208
    exc_register(7, "nm_fault", (iroutine) nm_fault);
209
    exc_register(12, "ss_fault", (iroutine) ss_fault);
210
    exc_register(13, "gp_fault", (iroutine) gp_fault);
211
    exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
212
 
213
#ifdef CONFIG_SMP
2604 jermar 214
    exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
215
        (iroutine) tlb_shootdown_ipi);
1958 decky 216
#endif
217
}
218
 
1780 jermar 219
void trap_virtual_enable_irqs(uint16_t irqmask)
226 palkovsky 220
{
221
    if (enable_irqs_function)
222
        enable_irqs_function(irqmask);
223
    else
224
        panic("no enable_irqs_function\n");
225
}
226
 
1780 jermar 227
void trap_virtual_disable_irqs(uint16_t irqmask)
226 palkovsky 228
{
229
    if (disable_irqs_function)
230
        disable_irqs_function(irqmask);
231
    else
232
        panic("no disable_irqs_function\n");
233
}
234
 
1888 jermar 235
/** @}
1702 cejka 236
 */