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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [IA64] remove evtchn_ia64.c
# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID 7c406cefc1aa82a33296086e41a9f61a504277ed
# Parent ceaae8fbe3f7ec0a489c4bf6b329b68bf4846df1
[IA64] remove evtchn_ia64.c
Signed-off-by Kevin Tian <kevin.tian@xxxxxxxxx>
---
linux-2.6-xen-sparse/arch/ia64/xen/drivers/evtchn_ia64.c | 261 ---------------
1 files changed, 261 deletions(-)
diff -r ceaae8fbe3f7 -r 7c406cefc1aa
linux-2.6-xen-sparse/arch/ia64/xen/drivers/evtchn_ia64.c
--- a/linux-2.6-xen-sparse/arch/ia64/xen/drivers/evtchn_ia64.c Wed May 24
16:44:20 2006 -0600
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,261 +0,0 @@
-/* NOTE: This file split off from evtchn.c because there was
- some discussion that the mechanism is sufficiently different.
- It may be possible to merge it back in the future... djm */
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <asm/hw_irq.h>
-#include <xen/evtchn.h>
-
-#define MAX_EVTCHN 1024
-
-/* Xen will never allocate port zero for any purpose. */
-#define VALID_EVTCHN(_chn) (((_chn) != 0) && ((_chn) < MAX_EVTCHN))
-
-/* Binding types. Hey, only IRQT_VIRQ and IRQT_EVTCHN are supported now
- * for XEN/IA64 - ktian1
- */
-enum { IRQT_UNBOUND, IRQT_PIRQ, IRQT_VIRQ, IRQT_IPI, IRQT_EVTCHN };
-
-/* Constructor for packed IRQ information. */
-#define mk_irq_info(type, index, evtchn) \
- (((u32)(type) << 24) | ((u32)(index) << 16) | (u32)(evtchn))
-/* Convenient shorthand for packed representation of an unbound IRQ. */
-#define IRQ_UNBOUND mk_irq_info(IRQT_UNBOUND, 0, 0)
-/* Accessor macros for packed IRQ information. */
-#define evtchn_from_irq(irq) ((u16)(irq_info[irq]))
-#define index_from_irq(irq) ((u8)(irq_info[irq] >> 16))
-#define type_from_irq(irq) ((u8)(irq_info[irq] >> 24))
-
-/* Packed IRQ information: binding type, sub-type index, and event channel. */
-static u32 irq_info[NR_IRQS];
-
-/* One note for XEN/IA64 is that we have all event channels bound to one
- * physical irq vector. So we always mean evtchn vector identical to 'irq'
- * vector in this context. - ktian1
- */
-static struct {
- irqreturn_t (*handler)(int, void *, struct pt_regs *);
- void *dev_id;
- char opened; /* Whether allocated */
-} evtchns[MAX_EVTCHN];
-
-/*
- * This lock protects updates to the following mapping and reference-count
- * arrays. The lock does not need to be acquired to read the mapping tables.
- */
-static spinlock_t irq_mapping_update_lock;
-
-void mask_evtchn(int port)
-{
- shared_info_t *s = HYPERVISOR_shared_info;
- synch_set_bit(port, &s->evtchn_mask[0]);
-}
-EXPORT_SYMBOL(mask_evtchn);
-
-void unmask_evtchn(int port)
-{
- shared_info_t *s = HYPERVISOR_shared_info;
- unsigned int cpu = smp_processor_id();
- vcpu_info_t *vcpu_info = &s->vcpu_info[cpu];
-
-#if 0 // FIXME: diverged from x86 evtchn.c
- /* Slow path (hypercall) if this is a non-local port. */
- if (unlikely(cpu != cpu_from_evtchn(port))) {
- struct evtchn_unmask op = { .port = port };
- (void)HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &op);
- return;
- }
-#endif
-
- synch_clear_bit(port, &s->evtchn_mask[0]);
-
- /*
- * The following is basically the equivalent of 'hw_resend_irq'. Just
- * like a real IO-APIC we 'lose the interrupt edge' if the channel is
- * masked.
- */
- if (synch_test_bit(port, &s->evtchn_pending[0]) &&
- !synch_test_and_set_bit(port / BITS_PER_LONG,
- &vcpu_info->evtchn_pending_sel)) {
- vcpu_info->evtchn_upcall_pending = 1;
- if (!vcpu_info->evtchn_upcall_mask)
- force_evtchn_callback();
- }
-}
-EXPORT_SYMBOL(unmask_evtchn);
-
-
-#define unbound_irq(e) (VALID_EVTCHN(e) && (!evtchns[(e)].opened))
-int bind_virq_to_irqhandler(
- unsigned int virq,
- unsigned int cpu,
- irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags,
- const char *devname,
- void *dev_id)
-{
- struct evtchn_bind_virq bind_virq;
- int evtchn;
-
- spin_lock(&irq_mapping_update_lock);
-
- bind_virq.virq = virq;
- bind_virq.vcpu = cpu;
- if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq, &bind_virq) != 0)
- BUG();
- evtchn = bind_virq.port;
-
- if (!unbound_irq(evtchn)) {
- evtchn = -EINVAL;
- goto out;
- }
-
- evtchns[evtchn].handler = handler;
- evtchns[evtchn].dev_id = dev_id;
- evtchns[evtchn].opened = 1;
- irq_info[evtchn] = mk_irq_info(IRQT_VIRQ, virq, evtchn);
-
- unmask_evtchn(evtchn);
-out:
- spin_unlock(&irq_mapping_update_lock);
- return evtchn;
-}
-
-int bind_evtchn_to_irqhandler(unsigned int evtchn,
- irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags, const char * devname, void *dev_id)
-{
- spin_lock(&irq_mapping_update_lock);
-
- if (!unbound_irq(evtchn)) {
- evtchn = -EINVAL;
- goto out;
- }
-
- evtchns[evtchn].handler = handler;
- evtchns[evtchn].dev_id = dev_id;
- evtchns[evtchn].opened = 1;
- irq_info[evtchn] = mk_irq_info(IRQT_EVTCHN, 0, evtchn);
-
- unmask_evtchn(evtchn);
-out:
- spin_unlock(&irq_mapping_update_lock);
- return evtchn;
-}
-
-int bind_ipi_to_irqhandler(
- unsigned int ipi,
- unsigned int cpu,
- irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags,
- const char *devname,
- void *dev_id)
-{
- printk("%s is called which has not been supported now...?\n",
__FUNCTION__);
- while(1);
-}
-
-void unbind_from_irqhandler(unsigned int irq, void *dev_id)
-{
- struct evtchn_close close;
- int evtchn = evtchn_from_irq(irq);
-
- spin_lock(&irq_mapping_update_lock);
-
- if (unbound_irq(irq))
- goto out;
-
- close.port = evtchn;
- if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0)
- BUG();
-
- switch (type_from_irq(irq)) {
- case IRQT_VIRQ:
- /* Add smp stuff later... */
- break;
- case IRQT_IPI:
- /* Add smp stuff later... */
- break;
- default:
- break;
- }
-
- mask_evtchn(evtchn);
- evtchns[evtchn].handler = NULL;
- evtchns[evtchn].opened = 0;
-
-out:
- spin_unlock(&irq_mapping_update_lock);
-}
-
-void notify_remote_via_irq(int irq)
-{
- int evtchn = evtchn_from_irq(irq);
-
- if (!unbound_irq(evtchn))
- notify_remote_via_evtchn(evtchn);
-}
-
-irqreturn_t evtchn_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
- unsigned long l1, l2;
- unsigned int l1i, l2i, port;
- irqreturn_t (*handler)(int, void *, struct pt_regs *);
- shared_info_t *s = HYPERVISOR_shared_info;
- vcpu_info_t *vcpu_info = &s->vcpu_info[smp_processor_id()];
-
- vcpu_info->evtchn_upcall_mask = 1;
- vcpu_info->evtchn_upcall_pending = 0;
-
- /* NB. No need for a barrier here -- XCHG is a barrier on x86. */
- l1 = xchg(&vcpu_info->evtchn_pending_sel, 0);
- while ( l1 != 0 )
- {
- l1i = __ffs(l1);
- l1 &= ~(1UL << l1i);
-
- while ( (l2 = s->evtchn_pending[l1i] & ~s->evtchn_mask[l1i]) != 0 )
- {
- l2i = __ffs(l2);
- l2 &= ~(1UL << l2i);
-
- port = (l1i * BITS_PER_LONG) + l2i;
- if ( (handler = evtchns[port].handler) != NULL )
- {
- clear_evtchn(port);
- handler(port, evtchns[port].dev_id, regs);
- }
- else
- {
- evtchn_device_upcall(port);
- }
- }
- }
- vcpu_info->evtchn_upcall_mask = 0;
- return IRQ_HANDLED;
-}
-
-void force_evtchn_callback(void)
-{
- //(void)HYPERVISOR_xen_version(0, NULL);
-}
-
-static struct irqaction evtchn_irqaction = {
- .handler = evtchn_interrupt,
- .flags = SA_INTERRUPT,
- .name = "xen-event-channel"
-};
-
-static int evtchn_irq = 0xe9;
-void __init evtchn_init(void)
-{
- shared_info_t *s = HYPERVISOR_shared_info;
-
- register_percpu_irq(evtchn_irq, &evtchn_irqaction);
-
- s->arch.evtchn_vector = evtchn_irq;
- printk("xen-event-channel using irq %d\n", evtchn_irq);
-
- spin_lock_init(&irq_mapping_update_lock);
- memset(evtchns, 0, sizeof(evtchns));
-}
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