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431 jermar 1
/*
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 * Copyright (C) 2005 Jakub Jermar
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 * Copyright (C) 2005 Jakub Vana
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 * 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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 */
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#include <arch/interrupt.h>
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#include <panic.h>
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#include <print.h>
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#include <console/console.h>
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#include <arch/types.h>
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#include <arch/asm.h>
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#include <arch/barrier.h>
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#include <arch/register.h>
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#include <arch/drivers/it.h>
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#include <arch.h>
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#include <symtab.h>
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#include <debug.h>
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#include <syscall/syscall.h>
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#include <print.h>
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#define VECTORS_64_BUNDLE   20
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#define VECTORS_16_BUNDLE   48
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#define VECTORS_16_BUNDLE_START 0x5000
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#define VECTOR_MAX      0x7f00
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#define BUNDLE_SIZE     16
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char *vector_names_64_bundle[VECTORS_64_BUNDLE] = {
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    "VHPT Translation vector",
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    "Instruction TLB vector",
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    "Data TLB vector",
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    "Alternate Instruction TLB vector",
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    "Alternate Data TLB vector",
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    "Data Nested TLB vector",
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    "Instruction Key Miss vector",
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    "Data Key Miss vector",
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    "Dirty-Bit vector",
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    "Instruction Access-Bit vector",
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    "Data Access-Bit vector"
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    "Break Instruction vector",
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    "External Interrupt vector"
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "Reserved"
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};
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char *vector_names_16_bundle[VECTORS_16_BUNDLE] = {
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    "Page Not Present vector",
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    "Key Permission vector",
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    "Instruction Access rights vector",
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    "Data Access Rights vector",
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    "General Exception vector",
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    "Disabled FP-Register vector",
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    "NaT Consumption vector",
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    "Speculation vector",
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    "Reserved",
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    "Debug vector",
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    "Unaligned Reference vector",
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    "Unsupported Data Reference vector",
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    "Floating-point Fault vector",
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    "Floating-point Trap vector",
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    "Lower-Privilege Transfer Trap vector",
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    "Taken Branch Trap vector",
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    "Single STep Trap vector",
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "Reserved",
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    "IA-32 Exception vector",
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    "IA-32 Intercept vector",
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    "IA-32 Interrupt vector",
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    "Reserved",
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    "Reserved",
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    "Reserved"
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};
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static char *vector_to_string(__u16 vector);
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static void dump_interrupted_context(struct exception_regdump *pstate);
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char *vector_to_string(__u16 vector)
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{
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    ASSERT(vector <= VECTOR_MAX);
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    if (vector >= VECTORS_16_BUNDLE_START)
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        return vector_names_16_bundle[(vector-VECTORS_16_BUNDLE_START)/(16*BUNDLE_SIZE)];
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    else
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        return vector_names_64_bundle[vector/(64*BUNDLE_SIZE)];
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}
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void dump_interrupted_context(struct exception_regdump *pstate)
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{
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    char *ifa, *iipa, *iip;
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    ifa = get_symtab_entry(pstate->cr_ifa);
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    iipa = get_symtab_entry(pstate->cr_iipa);
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    iip = get_symtab_entry(pstate->cr_iip);
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    putchar('\n');
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    printf("Interrupted context dump:\n");
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    printf("ar.bsp=%P\tar.bspstore=%P\n", pstate->ar_bsp, pstate->ar_bspstore);
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    printf("ar.rnat=%Q\tar.rsc=%Q\n", pstate->ar_rnat, pstate->ar_rsc);
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    printf("ar.ifs=%Q\tar.pfs=%Q\n", pstate->ar_ifs, pstate->ar_pfs);
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    printf("cr.isr=%Q\tcr.ipsr=%Q\t\n", pstate->cr_isr.value, pstate->cr_ipsr);
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    printf("cr.iip=%Q, #%d\t(%s)\n", pstate->cr_iip, pstate->cr_isr.ei ,iip ? iip : "?");
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    printf("cr.iipa=%Q\t(%s)\n", pstate->cr_iipa, iipa ? iipa : "?");
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    printf("cr.ifa=%Q\t(%s)\n", pstate->cr_ifa, ifa ? ifa : "?");
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}
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void general_exception(__u64 vector, struct exception_regdump *pstate)
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{
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    char *desc = "";
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    dump_interrupted_context(pstate);
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    switch (pstate->cr_isr.ge_code) {
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        case GE_ILLEGALOP:
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        desc = "Illegal Operation fault";
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        break;
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        case GE_PRIVOP:
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        desc = "Privileged Operation fault";
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        break;
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        case GE_PRIVREG:
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        desc = "Privileged Register fault";
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        break;
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        case GE_RESREGFLD:
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        desc = "Reserved Register/Field fault";
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        break;
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        case GE_DISBLDISTRAN:
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        desc = "Disabled Instruction Set Transition fault";
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        break;
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        case GE_ILLEGALDEP:
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        desc = "Illegal Dependency fault";
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        break;
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        default:
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            desc = "unknown";
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        break;
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    }
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    panic("General Exception (%s)\n", desc);
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}
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/** Handle syscall. */
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int break_instruction(__u64 vector, struct exception_regdump *pstate)
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{
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    /*
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     * Move to next instruction after BREAK.
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     */
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    if (pstate->cr_ipsr.ri == 2) {
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        pstate->cr_ipsr.ri = 0;
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        pstate->cr_iip += 16;
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    } else {
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        pstate->cr_ipsr.ri++;
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    }
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    if (pstate->in0 < SYSCALL_END)
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        return syscall_table[pstate->in0](pstate->in1, pstate->in2, pstate->in3);
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    else
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        panic("Undefined syscall %d", pstate->in0);
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    return -1;
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}
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void universal_handler(__u64 vector, struct exception_regdump *pstate)
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{
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    dump_interrupted_context(pstate);
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    panic("Interruption: %W (%s)\n", (__u16) vector, vector_to_string(vector));
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}
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void external_interrupt(__u64 vector, struct exception_regdump *pstate)
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{
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    cr_ivr_t ivr;
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    ivr.value = ivr_read();
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    srlz_d();
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    switch(ivr.vector) {
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        case INTERRUPT_TIMER:
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        it_interrupt();
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            break;
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        case INTERRUPT_SPURIOUS:
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            printf("cpu%d: spurious interrupt\n", CPU->id);
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        break;
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        default:
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        panic("\nUnhandled External Interrupt Vector %d\n", ivr.vector);
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        break;
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    }
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}