Пример #1
0
static void ia64_machine_kexec(struct unw_frame_info *info, void *arg)
{
	xen_kexec_image_t *image = arg;
	int ii;

	/* Interrupts aren't acceptable while we reboot */
	local_irq_disable();

	/* Mask CMC and Performance Monitor interrupts */
	ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
	ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);

	/* Mask ITV and Local Redirect Registers */
	ia64_set_itv(1 << 16);
	ia64_set_lrr0(1 << 16);
	ia64_set_lrr1(1 << 16);

	/* terminate possible nested in-service interrupts */
	for (ii = 0; ii < 16; ii++)
		ia64_eoi();

	/* unmask TPR and clear any pending interrupts */
	ia64_setreg(_IA64_REG_CR_TPR, 0);
	ia64_srlz_d();
	while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
		ia64_eoi();
	platform_kernel_launch_event();
	relocate_new_kernel(image->indirection_page, image->start_address,
			    __pa(ia64_boot_param), image->reboot_code_buffer);
	BUG();
}
Пример #2
0
static void ia64_machine_kexec(struct unw_frame_info *info, void *arg)
{
	struct kimage *image = arg;
	relocate_new_kernel_t rnk;
	void *pal_addr = efi_get_pal_addr();
	unsigned long code_addr = (unsigned long)page_address(image->control_code_page);
	unsigned long vector;
	int ii;
	u64 fp, gp;
	ia64_fptr_t *init_handler = (ia64_fptr_t *)ia64_os_init_on_kdump;

	BUG_ON(!image);
	if (image->type == KEXEC_TYPE_CRASH) {
		crash_save_this_cpu();
		current->thread.ksp = (__u64)info->sw - 16;

		/* Register noop init handler */
		fp = ia64_tpa(init_handler->fp);
		gp = ia64_tpa(ia64_getreg(_IA64_REG_GP));
		ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, fp, gp, 0, fp, gp, 0);
	} else {
		/* Unregister init handlers of current kernel */
		ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, 0, 0, 0, 0, 0, 0);
	}

	/* Unregister mca handler - No more recovery on current kernel */
	ia64_sal_set_vectors(SAL_VECTOR_OS_MCA, 0, 0, 0, 0, 0, 0);

	/* Interrupts aren't acceptable while we reboot */
	local_irq_disable();

	/* Mask CMC and Performance Monitor interrupts */
	ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
	ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);

	/* Mask ITV and Local Redirect Registers */
	ia64_set_itv(1 << 16);
	ia64_set_lrr0(1 << 16);
	ia64_set_lrr1(1 << 16);

	/* terminate possible nested in-service interrupts */
	for (ii = 0; ii < 16; ii++)
		ia64_eoi();

	/* unmask TPR and clear any pending interrupts */
	ia64_setreg(_IA64_REG_CR_TPR, 0);
	ia64_srlz_d();
	vector = ia64_get_ivr();
	while (vector != IA64_SPURIOUS_INT_VECTOR) {
		ia64_eoi();
		vector = ia64_get_ivr();
	}
	platform_kernel_launch_event();
	rnk = (relocate_new_kernel_t)&code_addr;
	(*rnk)(image->head, image->start, ia64_boot_param,
		     GRANULEROUNDDOWN((unsigned long) pal_addr));
	BUG();
}
Пример #3
0
void
ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
{
	struct pt_regs *old_regs = set_irq_regs(regs);
	unsigned long saved_tpr;

#if IRQ_DEBUG
	{
		unsigned long bsp, sp;

		bsp = ia64_getreg(_IA64_REG_AR_BSP);
		sp = ia64_getreg(_IA64_REG_SP);

		if ((sp - bsp) < 1024) {
			static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);

			if (__ratelimit(&ratelimit)) {
				printk("ia64_handle_irq: DANGER: less than "
				       "1KB of free stack space!!\n"
				       "(bsp=0x%lx, sp=%lx)\n", bsp, sp);
			}
		}
	}
#endif 

	irq_enter();
	saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
	ia64_srlz_d();
	while (vector != IA64_SPURIOUS_INT_VECTOR) {
		int irq = local_vector_to_irq(vector);
		struct irq_desc *desc = irq_to_desc(irq);

		if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
			smp_local_flush_tlb();
			kstat_incr_irqs_this_cpu(irq, desc);
		} else if (unlikely(IS_RESCHEDULE(vector))) {
			scheduler_ipi();
			kstat_incr_irqs_this_cpu(irq, desc);
		} else {
			ia64_setreg(_IA64_REG_CR_TPR, vector);
			ia64_srlz_d();

			if (unlikely(irq < 0)) {
				printk(KERN_ERR "%s: Unexpected interrupt "
				       "vector %d on CPU %d is not mapped "
				       "to any IRQ!\n", __func__, vector,
				       smp_processor_id());
			} else
				generic_handle_irq(irq);

			local_irq_disable();
			ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
		}
		ia64_eoi();
		vector = ia64_get_ivr();
	}
	irq_exit();
	set_irq_regs(old_regs);
}
Пример #4
0
/*
 * This function emulates a interrupt processing when a cpu is about to be
 * brought down.
 */
void ia64_process_pending_intr(void)
{
	ia64_vector vector;
	unsigned long saved_tpr;
	extern unsigned int vectors_in_migration[NR_IRQS];

	vector = ia64_get_ivr();

	irq_enter();
	saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
	ia64_srlz_d();

	 /*
	  * Perform normal interrupt style processing
	  */
	while (vector != IA64_SPURIOUS_INT_VECTOR) {
		int irq = local_vector_to_irq(vector);
		struct irq_desc *desc = irq_to_desc(irq);

		if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
			smp_local_flush_tlb();
			kstat_incr_irqs_this_cpu(irq, desc);
		} else if (unlikely(IS_RESCHEDULE(vector))) {
			kstat_incr_irqs_this_cpu(irq, desc);
		} else {
			struct pt_regs *old_regs = set_irq_regs(NULL);

			ia64_setreg(_IA64_REG_CR_TPR, vector);
			ia64_srlz_d();

			/*
			 * Now try calling normal ia64_handle_irq as it would have got called
			 * from a real intr handler. Try passing null for pt_regs, hopefully
			 * it will work. I hope it works!.
			 * Probably could shared code.
			 */
			if (unlikely(irq < 0)) {
				printk(KERN_ERR "%s: Unexpected interrupt "
				       "vector %d on CPU %d not being mapped "
				       "to any IRQ!!\n", __func__, vector,
				       smp_processor_id());
			} else {
				vectors_in_migration[irq]=0;
				generic_handle_irq(irq);
			}
			set_irq_regs(old_regs);

			/*
			 * Disable interrupts and send EOI
			 */
			local_irq_disable();
			ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
		}
		ia64_eoi();
		vector = ia64_get_ivr();
	}
	irq_exit();
}
Пример #5
0
void __init
check_sal_cache_flush (void)
{
	unsigned long flags;
	int cpu;
	u64 vector, cache_type = 3;
	struct ia64_sal_retval isrv;

	if (sal_cache_flush_drops_interrupts)
		return;

	cpu = get_cpu();
	local_irq_save(flags);

	/*
	 * Send ourselves a timer interrupt, wait until it's reported, and see
	 * if SAL_CACHE_FLUSH drops it.
	 */
	platform_send_ipi(cpu, IA64_TIMER_VECTOR, IA64_IPI_DM_INT, 0);

	while (!ia64_get_irr(IA64_TIMER_VECTOR))
		cpu_relax();

	SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);

	if (isrv.status)
		printk(KERN_ERR "SAL_CAL_FLUSH failed with %ld\n", isrv.status);

	if (ia64_get_irr(IA64_TIMER_VECTOR)) {
		vector = ia64_get_ivr();
		ia64_eoi();
		WARN_ON(vector != IA64_TIMER_VECTOR);
	} else {
		sal_cache_flush_drops_interrupts = 1;
		printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; "
			"PAL_CACHE_FLUSH will be used instead\n");
		ia64_eoi();
	}

	local_irq_restore(flags);
	put_cpu();
}
Пример #6
0
/*
 * Do not allocate memory (or fail in any way) in machine_kexec().
 * We are past the point of no return, committed to rebooting now.
 */
static void ia64_machine_kexec(struct unw_frame_info *info, void *arg)
{
    struct kimage *image = arg;
    relocate_new_kernel_t rnk;
    void *pal_addr = efi_get_pal_addr();
    unsigned long code_addr = (unsigned long)page_address(image->control_code_page);
    int ii;

    BUG_ON(!image);
    if (image->type == KEXEC_TYPE_CRASH) {
        crash_save_this_cpu();
        current->thread.ksp = (__u64)info->sw - 16;
    }

    /* Interrupts aren't acceptable while we reboot */
    local_irq_disable();

    /* Mask CMC and Performance Monitor interrupts */
    ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
    ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);

    /* Mask ITV and Local Redirect Registers */
    ia64_set_itv(1 << 16);
    ia64_set_lrr0(1 << 16);
    ia64_set_lrr1(1 << 16);

    /* terminate possible nested in-service interrupts */
    for (ii = 0; ii < 16; ii++)
        ia64_eoi();

    /* unmask TPR and clear any pending interrupts */
    ia64_setreg(_IA64_REG_CR_TPR, 0);
    ia64_srlz_d();
    while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
        ia64_eoi();
    platform_kernel_launch_event();
    rnk = (relocate_new_kernel_t)&code_addr;
    (*rnk)(image->head, image->start, ia64_boot_param,
             GRANULEROUNDDOWN((unsigned long) pal_addr));
    BUG();
}
Пример #7
0
static inline void
sn_get_all_ivr(void) {
	int vector;

	vector = ia64_get_ivr();
	while (vector != IA64_SPURIOUS_INT_VECTOR) {
		__set_bit(vector, (volatile void *)pda.sn_soft_irr);
		ia64_eoi();
		if (vector > IA64_LAST_DEVICE_VECTOR) return;
		vector = ia64_get_ivr();
	}
}
Пример #8
0
static void __init
check_sal_cache_flush (void)
{
	unsigned long flags;
	int cpu;
	u64 vector;

	cpu = get_cpu();
	local_irq_save(flags);

	/*
	 * Schedule a timer interrupt, wait until it's reported, and see if
	 * SAL_CACHE_FLUSH drops it.
	 */
	ia64_set_itv(IA64_TIMER_VECTOR);
	ia64_set_itm(ia64_get_itc() + 1000);

	while (!ia64_get_irr(IA64_TIMER_VECTOR))
		cpu_relax();

	ia64_sal_cache_flush(3);

	if (ia64_get_irr(IA64_TIMER_VECTOR)) {
		vector = ia64_get_ivr();
		ia64_eoi();
		WARN_ON(vector != IA64_TIMER_VECTOR);
	} else {
		sal_cache_flush_drops_interrupts = 1;
		printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; "
			"PAL_CACHE_FLUSH will be used instead\n");
		ia64_eoi();
	}

	local_irq_restore(flags);
	put_cpu();
}
Пример #9
0
void ia64_process_pending_intr(void)
{
	ia64_vector vector;
	unsigned long saved_tpr;
	extern unsigned int vectors_in_migration[NR_IRQS];

	vector = ia64_get_ivr();

	irq_enter();
	saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
	ia64_srlz_d();

	while (vector != IA64_SPURIOUS_INT_VECTOR) {
		int irq = local_vector_to_irq(vector);
		struct irq_desc *desc = irq_to_desc(irq);

		if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
			smp_local_flush_tlb();
			kstat_incr_irqs_this_cpu(irq, desc);
		} else if (unlikely(IS_RESCHEDULE(vector))) {
			kstat_incr_irqs_this_cpu(irq, desc);
		} else {
			struct pt_regs *old_regs = set_irq_regs(NULL);

			ia64_setreg(_IA64_REG_CR_TPR, vector);
			ia64_srlz_d();

			if (unlikely(irq < 0)) {
				printk(KERN_ERR "%s: Unexpected interrupt "
				       "vector %d on CPU %d not being mapped "
				       "to any IRQ!!\n", __func__, vector,
				       smp_processor_id());
			} else {
				vectors_in_migration[irq]=0;
				generic_handle_irq(irq);
			}
			set_irq_regs(old_regs);

			local_irq_disable();
			ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
		}
		ia64_eoi();
		vector = ia64_get_ivr();
	}
	irq_exit();
}
Пример #10
0
/*
 * That's where the IVT branches when we get an external
 * interrupt. This branches to the correct hardware IRQ handler via
 * function ptr.
 */
void
ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
{
	struct pt_regs *old_regs = set_irq_regs(regs);
	unsigned long saved_tpr;

#if IRQ_DEBUG
	{
		unsigned long bsp, sp;

		/*
		 * Note: if the interrupt happened while executing in
		 * the context switch routine (ia64_switch_to), we may
		 * get a spurious stack overflow here.  This is
		 * because the register and the memory stack are not
		 * switched atomically.
		 */
		bsp = ia64_getreg(_IA64_REG_AR_BSP);
		sp = ia64_getreg(_IA64_REG_SP);

		if ((sp - bsp) < 1024) {
			static unsigned char count;
			static long last_time;

			if (time_after(jiffies, last_time + 5 * HZ))
				count = 0;
			if (++count < 5) {
				last_time = jiffies;
				printk("ia64_handle_irq: DANGER: less than "
				       "1KB of free stack space!!\n"
				       "(bsp=0x%lx, sp=%lx)\n", bsp, sp);
			}
		}
	}
#endif /* IRQ_DEBUG */

	/*
	 * Always set TPR to limit maximum interrupt nesting depth to
	 * 16 (without this, it would be ~240, which could easily lead
	 * to kernel stack overflows).
	 */
	irq_enter();
	saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
	ia64_srlz_d();
	while (vector != IA64_SPURIOUS_INT_VECTOR) {
		int irq = local_vector_to_irq(vector);
		struct irq_desc *desc = irq_to_desc(irq);

		if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
			smp_local_flush_tlb();
			kstat_incr_irqs_this_cpu(irq, desc);
		} else if (unlikely(IS_RESCHEDULE(vector))) {
			kstat_incr_irqs_this_cpu(irq, desc);
		} else {
			ia64_setreg(_IA64_REG_CR_TPR, vector);
			ia64_srlz_d();

			if (unlikely(irq < 0)) {
				printk(KERN_ERR "%s: Unexpected interrupt "
				       "vector %d on CPU %d is not mapped "
				       "to any IRQ!\n", __func__, vector,
				       smp_processor_id());
			} else
				generic_handle_irq(irq);

			/*
			 * Disable interrupts and send EOI:
			 */
			local_irq_disable();
			ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
		}
		ia64_eoi();
		vector = ia64_get_ivr();
	}
	/*
	 * This must be done *after* the ia64_eoi().  For example, the keyboard softirq
	 * handler needs to be able to wait for further keyboard interrupts, which can't
	 * come through until ia64_eoi() has been done.
	 */
	irq_exit();
	set_irq_regs(old_regs);
}
Пример #11
0
static void ia64_ack_msi_irq(unsigned int irq)
{
	irq_complete_move(irq);
	move_native_irq(irq);
	ia64_eoi();
}
static void sn_ack_msi_irq(struct irq_data *data)
{
	irq_move_irq(data);
	ia64_eoi();
}
Пример #13
0
static void ia64_ack_msi_irq(unsigned int irq)
{
	move_native_irq(irq);
	ia64_eoi();
}
Пример #14
0
static void ia64_ack_msi_irq(struct irq_data *data)
{
	irq_complete_move(data->irq);
	irq_move_irq(data);
	ia64_eoi();
}