KVM: In kernel PIT model

[pandora-kernel.git] / arch / x86 / kvm / i8254.h

diff --git a/arch/x86/kvm/i8254.h b/arch/x86/kvm/i8254.h
new file mode 100644 (file)
index 0000000..d77d6b7
--- /dev/null
+++ b/arch/x86/kvm/i8254.h
@@ -0,0 +1,61 @@
+#ifndef __I8254_H
+#define __I8254_H
+
+#include "iodev.h"
+
+struct kvm_kpit_timer {
+       struct hrtimer timer;
+       int irq;
+       s64 period; /* unit: ns */
+       s64 scheduled;
+       ktime_t last_update;
+       atomic_t pending;
+};
+
+struct kvm_kpit_channel_state {
+       u32 count; /* can be 65536 */
+       u16 latched_count;
+       u8 count_latched;
+       u8 status_latched;
+       u8 status;
+       u8 read_state;
+       u8 write_state;
+       u8 write_latch;
+       u8 rw_mode;
+       u8 mode;
+       u8 bcd; /* not supported */
+       u8 gate; /* timer start */
+       ktime_t count_load_time;
+};
+
+struct kvm_kpit_state {
+       struct kvm_kpit_channel_state channels[3];
+       struct kvm_kpit_timer pit_timer;
+       u32    speaker_data_on;
+       struct mutex lock;
+       struct kvm_pit *pit;
+       bool inject_pending; /* if inject pending interrupts */
+       unsigned long last_injected_time;
+};
+
+struct kvm_pit {
+       unsigned long base_addresss;
+       struct kvm_io_device dev;
+       struct kvm_io_device speaker_dev;
+       struct kvm *kvm;
+       struct kvm_kpit_state pit_state;
+};
+
+#define KVM_PIT_BASE_ADDRESS       0x40
+#define KVM_SPEAKER_BASE_ADDRESS    0x61
+#define KVM_PIT_MEM_LENGTH         4
+#define KVM_PIT_FREQ               1193181
+#define KVM_MAX_PIT_INTR_INTERVAL   HZ / 100
+#define KVM_PIT_CHANNEL_MASK       0x3
+
+void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu);
+void kvm_pit_timer_intr_post(struct kvm_vcpu *vcpu, int vec);
+struct kvm_pit *kvm_create_pit(struct kvm *kvm);
+void kvm_free_pit(struct kvm *kvm);
+
+#endif