WebSVN – HelenOS-historic – Diff – //kernel/trunk/arch/ia64/src/mm/tlb.c



}
 
/** Instruction TLB fault handler for faults with VHPT turned off.
 *
 * @param vector Interruption vector.
 * @param istate Structure with saved interruption state.
 */
void alternate_instruction_tlb_fault(__u64 vector, istate_t *istate)
{
    region_register rr;
    __address va;
    pte_t *t;
   
    va = istate->cr_ifa;    /* faulting address */
    t = page_mapping_find(AS, va);
    if (t) {
        /*
         * The mapping was found in software page hash table.
         * Insert it into data translation cache.

    } else {
        /*
         * Forward the page fault to address space page fault handler.
         */
        if (!as_page_fault(va)) {
            panic("%s: va=%P, rid=%d\n", __FUNCTION__, istate->cr_ifa, rr.map.rid);
        }
    }
}
 
/** Data TLB fault handler for faults with VHPT turned off.
 *
 * @param vector Interruption vector.
 * @param istate Structure with saved interruption state.
 */
void alternate_data_tlb_fault(__u64 vector, istate_t *istate)
{
    region_register rr;
    rid_t rid;
    __address va;
    pte_t *t;
   
    va = istate->cr_ifa;    /* faulting address */
    rr.word = rr_read(VA2VRN(va));
    rid = rr.map.rid;
    if (RID2ASID(rid) == ASID_KERNEL) {
        if (VA2VRN(va) == VRN_KERNEL) {
            /*

    } else {
        /*
         * Forward the page fault to address space page fault handler.
         */
        if (!as_page_fault(va)) {
            panic("%s: va=%P, rid=%d\n", __FUNCTION__, istate->cr_ifa, rr.map.rid);
        }
    }
}
 
/** Data nested TLB fault handler.
 *
 * This fault should not occur.
 *
 * @param vector Interruption vector.
 * @param istate Structure with saved interruption state.
 */
void data_nested_tlb_fault(__u64 vector, istate_t *istate)
{
    panic("%s\n", __FUNCTION__);
}
 
/** Data Dirty bit fault handler.
 *
 * @param vector Interruption vector.
 * @param istate Structure with saved interruption state.
 */
void data_dirty_bit_fault(__u64 vector, istate_t *istate)
{
    pte_t *t;
 
    t = page_mapping_find(AS, istate->cr_ifa);
    ASSERT(t && t->p);
    if (t && t->p) {
        /*
         * Update the Dirty bit in page tables and reinsert
         * the mapping into DTC.

}
 
/** Instruction access bit fault handler.
 *
 * @param vector Interruption vector.
 * @param istate Structure with saved interruption state.
 */
void instruction_access_bit_fault(__u64 vector, istate_t *istate)
{
    pte_t *t;
 
    t = page_mapping_find(AS, istate->cr_ifa);
    ASSERT(t && t->p);
    if (t && t->p) {
        /*
         * Update the Accessed bit in page tables and reinsert
         * the mapping into ITC.

}
 
/** Data access bit fault handler.
 *
 * @param vector Interruption vector.
 * @param istate Structure with saved interruption state.
 */
void data_access_bit_fault(__u64 vector, istate_t *istate)
{
    pte_t *t;
 
    t = page_mapping_find(AS, istate->cr_ifa);
    ASSERT(t && t->p);
    if (t && t->p) {
        /*
         * Update the Accessed bit in page tables and reinsert
         * the mapping into DTC.

}
 
/** Page not present fault handler.
 *
 * @param vector Interruption vector.
 * @param istate Structure with saved interruption state.
 */
void page_not_present(__u64 vector, istate_t *istate)
{
    region_register rr;
    __address va;
    pte_t *t;
   
    va = istate->cr_ifa;    /* faulting address */
    t = page_mapping_find(AS, va);
    ASSERT(t);
   
    if (t->p) {
        /*

            itc_pte_copy(t);
        else
            dtc_pte_copy(t);
    } else {
        if (!as_page_fault(va)) {
            panic("%s: va=%P, rid=%d\n", __FUNCTION__, istate->cr_ifa, rr.map.rid);
        }
    }
}

Rev 947	Rev 958
Line 440...	Line 440...
440	}	440	}
441		441
442	/** Instruction TLB fault handler for faults with VHPT turned off.	442	/** Instruction TLB fault handler for faults with VHPT turned off.
443	*	443	*
444	* @param vector Interruption vector.	444	* @param vector Interruption vector.
445	* @param pstate Structure with saved interruption state.	445	* @param istate Structure with saved interruption state.
446	*/	446	*/
447	void alternate_instruction_tlb_fault(__u64 vector, struct exception_regdump *pstate)	447	void alternate_instruction_tlb_fault(__u64 vector, istate_t *istate)
448	{	448	{
449	region_register rr;	449	region_register rr;
450	__address va;	450	__address va;
451	pte_t *t;	451	pte_t *t;
452		452
453	va = pstate->cr_ifa; /* faulting address */	453	va = istate->cr_ifa; /* faulting address */
454	t = page_mapping_find(AS, va);	454	t = page_mapping_find(AS, va);
455	if (t) {	455	if (t) {
456	/*	456	/*
457	* The mapping was found in software page hash table.	457	* The mapping was found in software page hash table.
458	* Insert it into data translation cache.	458	* Insert it into data translation cache.
Line 461...	Line 461...
461	} else {	461	} else {
462	/*	462	/*
463	* Forward the page fault to address space page fault handler.	463	* Forward the page fault to address space page fault handler.
464	*/	464	*/
465	if (!as_page_fault(va)) {	465	if (!as_page_fault(va)) {
466	panic("%s: va=%P, rid=%d\n", __FUNCTION__, pstate->cr_ifa, rr.map.rid);	466	panic("%s: va=%P, rid=%d\n", __FUNCTION__, istate->cr_ifa, rr.map.rid);
467	}	467	}
468	}	468	}
469	}	469	}
470		470
471	/** Data TLB fault handler for faults with VHPT turned off.	471	/** Data TLB fault handler for faults with VHPT turned off.
472	*	472	*
473	* @param vector Interruption vector.	473	* @param vector Interruption vector.
474	* @param pstate Structure with saved interruption state.	474	* @param istate Structure with saved interruption state.
475	*/	475	*/
476	void alternate_data_tlb_fault(__u64 vector, struct exception_regdump *pstate)	476	void alternate_data_tlb_fault(__u64 vector, istate_t *istate)
477	{	477	{
478	region_register rr;	478	region_register rr;
479	rid_t rid;	479	rid_t rid;
480	__address va;	480	__address va;
481	pte_t *t;	481	pte_t *t;
482		482
483	va = pstate->cr_ifa; /* faulting address */	483	va = istate->cr_ifa; /* faulting address */
484	rr.word = rr_read(VA2VRN(va));	484	rr.word = rr_read(VA2VRN(va));
485	rid = rr.map.rid;	485	rid = rr.map.rid;
486	if (RID2ASID(rid) == ASID_KERNEL) {	486	if (RID2ASID(rid) == ASID_KERNEL) {
487	if (VA2VRN(va) == VRN_KERNEL) {	487	if (VA2VRN(va) == VRN_KERNEL) {
488	/*	488	/*
Line 504...	Line 504...
504	} else {	504	} else {
505	/*	505	/*
506	* Forward the page fault to address space page fault handler.	506	* Forward the page fault to address space page fault handler.
507	*/	507	*/
508	if (!as_page_fault(va)) {	508	if (!as_page_fault(va)) {
509	panic("%s: va=%P, rid=%d\n", __FUNCTION__, pstate->cr_ifa, rr.map.rid);	509	panic("%s: va=%P, rid=%d\n", __FUNCTION__, istate->cr_ifa, rr.map.rid);
510	}	510	}
511	}	511	}
512	}	512	}
513		513
514	/** Data nested TLB fault handler.	514	/** Data nested TLB fault handler.
515	*	515	*
516	* This fault should not occur.	516	* This fault should not occur.
517	*	517	*
518	* @param vector Interruption vector.	518	* @param vector Interruption vector.
519	* @param pstate Structure with saved interruption state.	519	* @param istate Structure with saved interruption state.
520	*/	520	*/
521	void data_nested_tlb_fault(__u64 vector, struct exception_regdump *pstate)	521	void data_nested_tlb_fault(__u64 vector, istate_t *istate)
522	{	522	{
523	panic("%s\n", __FUNCTION__);	523	panic("%s\n", __FUNCTION__);
524	}	524	}
525		525
526	/** Data Dirty bit fault handler.	526	/** Data Dirty bit fault handler.
527	*	527	*
528	* @param vector Interruption vector.	528	* @param vector Interruption vector.
529	* @param pstate Structure with saved interruption state.	529	* @param istate Structure with saved interruption state.
530	*/	530	*/
531	void data_dirty_bit_fault(__u64 vector, struct exception_regdump *pstate)	531	void data_dirty_bit_fault(__u64 vector, istate_t *istate)
532	{	532	{
533	pte_t *t;	533	pte_t *t;
534		534
535	t = page_mapping_find(AS, pstate->cr_ifa);	535	t = page_mapping_find(AS, istate->cr_ifa);
536	ASSERT(t && t->p);	536	ASSERT(t && t->p);
537	if (t && t->p) {	537	if (t && t->p) {
538	/*	538	/*
539	* Update the Dirty bit in page tables and reinsert	539	* Update the Dirty bit in page tables and reinsert
540	* the mapping into DTC.	540	* the mapping into DTC.
Line 545...	Line 545...
545	}	545	}
546		546
547	/** Instruction access bit fault handler.	547	/** Instruction access bit fault handler.
548	*	548	*
549	* @param vector Interruption vector.	549	* @param vector Interruption vector.
550	* @param pstate Structure with saved interruption state.	550	* @param istate Structure with saved interruption state.
551	*/	551	*/
552	void instruction_access_bit_fault(__u64 vector, struct exception_regdump *pstate)	552	void instruction_access_bit_fault(__u64 vector, istate_t *istate)
553	{	553	{
554	pte_t *t;	554	pte_t *t;
555		555
556	t = page_mapping_find(AS, pstate->cr_ifa);	556	t = page_mapping_find(AS, istate->cr_ifa);
557	ASSERT(t && t->p);	557	ASSERT(t && t->p);
558	if (t && t->p) {	558	if (t && t->p) {
559	/*	559	/*
560	* Update the Accessed bit in page tables and reinsert	560	* Update the Accessed bit in page tables and reinsert
561	* the mapping into ITC.	561	* the mapping into ITC.
Line 566...	Line 566...
566	}	566	}
567		567
568	/** Data access bit fault handler.	568	/** Data access bit fault handler.
569	*	569	*
570	* @param vector Interruption vector.	570	* @param vector Interruption vector.
571	* @param pstate Structure with saved interruption state.	571	* @param istate Structure with saved interruption state.
572	*/	572	*/
573	void data_access_bit_fault(__u64 vector, struct exception_regdump *pstate)	573	void data_access_bit_fault(__u64 vector, istate_t *istate)
574	{	574	{
575	pte_t *t;	575	pte_t *t;
576		576
577	t = page_mapping_find(AS, pstate->cr_ifa);	577	t = page_mapping_find(AS, istate->cr_ifa);
578	ASSERT(t && t->p);	578	ASSERT(t && t->p);
579	if (t && t->p) {	579	if (t && t->p) {
580	/*	580	/*
581	* Update the Accessed bit in page tables and reinsert	581	* Update the Accessed bit in page tables and reinsert
582	* the mapping into DTC.	582	* the mapping into DTC.
Line 587...	Line 587...
587	}	587	}
588		588
589	/** Page not present fault handler.	589	/** Page not present fault handler.
590	*	590	*
591	* @param vector Interruption vector.	591	* @param vector Interruption vector.
592	* @param pstate Structure with saved interruption state.	592	* @param istate Structure with saved interruption state.
593	*/	593	*/
594	void page_not_present(__u64 vector, struct exception_regdump *pstate)	594	void page_not_present(__u64 vector, istate_t *istate)
595	{	595	{
596	region_register rr;	596	region_register rr;
597	__address va;	597	__address va;
598	pte_t *t;	598	pte_t *t;
599		599
600	va = pstate->cr_ifa; /* faulting address */	600	va = istate->cr_ifa; /* faulting address */
601	t = page_mapping_find(AS, va);	601	t = page_mapping_find(AS, va);
602	ASSERT(t);	602	ASSERT(t);
603		603
604	if (t->p) {	604	if (t->p) {
605	/*	605	/*
Line 610...	Line 610...
610	itc_pte_copy(t);	610	itc_pte_copy(t);
611	else	611	else
612	dtc_pte_copy(t);	612	dtc_pte_copy(t);
613	} else {	613	} else {
614	if (!as_page_fault(va)) {	614	if (!as_page_fault(va)) {
615	panic("%s: va=%P, rid=%d\n", __FUNCTION__, pstate->cr_ifa, rr.map.rid);	615	panic("%s: va=%P, rid=%d\n", __FUNCTION__, istate->cr_ifa, rr.map.rid);
616	}	616	}
617	}	617	}
618	}	618	}

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(root)//kernel/trunk/arch/ia64/src/mm/tlb.c – Rev 947 → 958