i8254: Factor out pit_get_channel_info

Instead of providing 4 individual query functions for mode, gate, output
and initial counter state, introduce a service that queries all
information at once. This comes with tiny additional costs for
pcspk_callback but with a much cleaner interface. Also, it will simplify
the implementation of the KVM in-kernel PIT model.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/hw/i8254.h b/hw/i8254.h
index 8ad8e07..a1d2e98 100644
--- a/hw/i8254.h
+++ b/hw/i8254.h
@@ -30,6 +30,13 @@
 
 #define PIT_FREQ 1193182
 
+typedef struct PITChannelInfo {
+    int gate;
+    int mode;
+    int initial_count;
+    int out;
+} PITChannelInfo;
+
 static inline ISADevice *pit_init(ISABus *bus, int base, int isa_irq,
                                   qemu_irq alt_irq)
 {
@@ -45,9 +52,6 @@ static inline ISADevice *pit_init(ISABus *bus, int base, int isa_irq,
 }
 
 void pit_set_gate(ISADevice *dev, int channel, int val);
-int pit_get_gate(ISADevice *dev, int channel);
-int pit_get_initial_count(ISADevice *dev, int channel);
-int pit_get_mode(ISADevice *dev, int channel);
-int pit_get_out(ISADevice *dev, int channel, int64_t current_time);
+void pit_get_channel_info(ISADevice *dev, int channel, PITChannelInfo *info);
 
 #endif /* !HW_I8254_H */