interrupt.c

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/*
 * Copyright (C) 2005 Jakub Jermar
 * Copyright (C) 2005 Jakub Vana
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <arch/interrupt.h>
#include <panic.h>
#include <print.h>
#include <console/console.h>
#include <arch/types.h>
#include <arch/asm.h>
#include <arch/barrier.h>
#include <arch/register.h>
#include <arch/drivers/it.h>
#include <arch.h>
#include <symtab.h>
#include <debug.h>
#include <syscall/syscall.h>
#include <print.h>
#include <proc/scheduler.h>
#include <ipc/sysipc.h>
#include <ipc/irq.h>
#include <ipc/ipc.h>
#include <interrupt.h>


#define VECTORS_64_BUNDLE       20
#define VECTORS_16_BUNDLE       48
#define VECTORS_16_BUNDLE_START 0x5000
#define VECTOR_MAX              0x7f00

#define BUNDLE_SIZE             16


char *vector_names_64_bundle[VECTORS_64_BUNDLE] = {
        "VHPT Translation vector",
        "Instruction TLB vector",
        "Data TLB vector",
        "Alternate Instruction TLB vector",
        "Alternate Data TLB vector",
        "Data Nested TLB vector",
        "Instruction Key Miss vector",
        "Data Key Miss vector",
        "Dirty-Bit vector",
        "Instruction Access-Bit vector",
        "Data Access-Bit vector"
        "Break Instruction vector",
        "External Interrupt vector"
        "Reserved",
        "Reserved",
        "Reserved",
        "Reserved",
        "Reserved",
        "Reserved",
        "Reserved"
};

char *vector_names_16_bundle[VECTORS_16_BUNDLE] = {
        "Page Not Present vector",
        "Key Permission vector",
        "Instruction Access rights vector",
        "Data Access Rights vector",
        "General Exception vector",
        "Disabled FP-Register vector",
        "NaT Consumption vector",
        "Speculation vector",
        "Reserved",
        "Debug vector",
        "Unaligned Reference vector",
        "Unsupported Data Reference vector",
        "Floating-point Fault vector",
        "Floating-point Trap vector",
        "Lower-Privilege Transfer Trap vector",
        "Taken Branch Trap vector",
        "Single STep Trap vector",
        "Reserved",
        "Reserved",
        "Reserved",
        "Reserved",
        "Reserved",
        "Reserved",
        "Reserved",
        "Reserved",
        "IA-32 Exception vector",
        "IA-32 Intercept vector",
        "IA-32 Interrupt vector",
        "Reserved",
        "Reserved",
        "Reserved"
};

static char *vector_to_string(__u16 vector);
static void dump_interrupted_context(istate_t *istate);

char *vector_to_string(__u16 vector)
{
        ASSERT(vector <= VECTOR_MAX);
        
        if (vector >= VECTORS_16_BUNDLE_START)
                return vector_names_16_bundle[(vector-VECTORS_16_BUNDLE_START)/(16*BUNDLE_SIZE)];
        else
                return vector_names_64_bundle[vector/(64*BUNDLE_SIZE)];
}

void dump_interrupted_context(istate_t *istate)
{
        char *ifa, *iipa, *iip;

        ifa = get_symtab_entry(istate->cr_ifa);
        iipa = get_symtab_entry(istate->cr_iipa);
        iip = get_symtab_entry(istate->cr_iip);

        putchar('\n');
        printf("Interrupted context dump:\n");
        printf("ar.bsp=%p\tar.bspstore=%p\n", istate->ar_bsp, istate->ar_bspstore);
        printf("ar.rnat=%#018llx\tar.rsc=%#018llx\n", istate->ar_rnat, istate->ar_rsc);
        printf("ar.ifs=%#018llx\tar.pfs=%#018llx\n", istate->ar_ifs, istate->ar_pfs);
        printf("cr.isr=%#018llx\tcr.ipsr=%#018llx\t\n", istate->cr_isr.value, istate->cr_ipsr);
        
        printf("cr.iip=%#018llx, #%d\t(%s)\n", istate->cr_iip, istate->cr_isr.ei, iip);
        printf("cr.iipa=%#018llx\t(%s)\n", istate->cr_iipa, iipa);
        printf("cr.ifa=%#018llx\t(%s)\n", istate->cr_ifa, ifa);
}

void general_exception(__u64 vector, istate_t *istate)
{
        char *desc = "";

        switch (istate->cr_isr.ge_code) {
            case GE_ILLEGALOP:
                desc = "Illegal Operation fault";
                break;
            case GE_PRIVOP:
                desc = "Privileged Operation fault";
                break;
            case GE_PRIVREG:
                desc = "Privileged Register fault";
                break;
            case GE_RESREGFLD:
                desc = "Reserved Register/Field fault";
                break;
            case GE_DISBLDISTRAN:
                desc = "Disabled Instruction Set Transition fault";
                break;
            case GE_ILLEGALDEP:
                desc = "Illegal Dependency fault";
                break;
            default:
                desc = "unknown";
                break;
        }

        fault_if_from_uspace(istate, "General Exception (%s)", desc);

        dump_interrupted_context(istate);
        panic("General Exception (%s)\n", desc);
}

void fpu_enable(void);

void disabled_fp_register(__u64 vector, istate_t *istate)
{
#ifdef CONFIG_FPU_LAZY 
        scheduler_fpu_lazy_request();   
#else
        fault_if_from_uspace(istate, "Interruption: %#hx (%s)", (__u16) vector, vector_to_string(vector));
        dump_interrupted_context(istate);
        panic("Interruption: %#hx (%s)\n", (__u16) vector, vector_to_string(vector));
#endif
}


void nop_handler(__u64 vector, istate_t *istate)
{
}



int break_instruction(__u64 vector, istate_t *istate)
{
        /*
         * Move to next instruction after BREAK.
         */
        if (istate->cr_ipsr.ri == 2) {
                istate->cr_ipsr.ri = 0;
                istate->cr_iip += 16;
        } else {
                istate->cr_ipsr.ri++;
        }

        if (istate->in4 < SYSCALL_END)
                return syscall_table[istate->in4](istate->in0, istate->in1, istate->in2, istate->in3);
        else
                panic("Undefined syscall %d", istate->in4);
                
        return -1;
}

void universal_handler(__u64 vector, istate_t *istate)
{
        fault_if_from_uspace(istate,"Interruption: %#hx (%s)\n",(__u16) vector, vector_to_string(vector));
        dump_interrupted_context(istate);
        panic("Interruption: %#hx (%s)\n", (__u16) vector, vector_to_string(vector));
}

void external_interrupt(__u64 vector, istate_t *istate)
{
        cr_ivr_t ivr;
        
        ivr.value = ivr_read();
        srlz_d();

        switch(ivr.vector) {
            case INTERRUPT_TIMER:
                it_interrupt();
                break;
            case INTERRUPT_SPURIOUS:
                printf("cpu%d: spurious interrupt\n", CPU->id);
                break;
            default:
                panic("\nUnhandled External Interrupt Vector %d\n", ivr.vector);
                break;
        }
}

void virtual_interrupt(__u64 irq,void *param)
{
        switch(irq) {
                case IRQ_KBD:
                        if(kbd_uspace) ipc_irq_send_notif(irq);
                        break;
                default:
                        panic("\nUnhandled Virtual Interrupt request %d\n", irq);
                break;
        }
}

/* Reregister irq to be IPC-ready */
void irq_ipc_bind_arch(__native irq)
{
        if(irq==IRQ_KBD) {
                kbd_uspace=1;
                return;
        }
        return;
        panic("not implemented\n");
        /* TODO */
}

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