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Add HPET emulation to qemu (Beth Kon)

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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
This commit is contained in:
aliguori 2008-12-17 23:28:44 +00:00
parent 0bacd1300d
commit 16b29ae180
13 changed files with 938 additions and 6 deletions
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4
hw/pc.c
View file

@ -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);
}