Add HPET emulation to qemu (Beth Kon)

This patch adds HPET emulation.  It can be disabled with -disable-hpet.  An hpet
provides a more finely granular clocksource than otherwise available on PC.
This means that latency-dependent applications (e.g. multimedia) will generally
be smoother when using the HPET.

Signed-off-by: Beth Kon <eak@us.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6081 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 4 insertions, 0 deletions

diff --git a/hw/pc.c b/hw/pc.c
index fe03704288..64c08a4342 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -35,6 +35,7 @@
 #include "fw_cfg.h"
 #include "virtio-blk.h"
 #include "virtio-balloon.h"
+#include "hpet_emul.h"
 
 /* output Bochs bios info messages */
 //#define DEBUG_BIOS
@@ -977,6 +978,9 @@ static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
     }
     pit = pit_init(0x40, i8259[0]);
     pcspk_init(pit);
+    if (!no_hpet) {
+        hpet_init(i8259);
+    }
     if (pci_enabled) {
         pic_set_alt_irq_func(isa_pic, ioapic_set_irq, ioapic);
     }