acpi.c: make qemu_system_device_hot_add piix independent.

introruce piix4_device_hot_add() for piix4 specific code
and make qemu_system_device_hot_add() generic.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 18 insertions, 2 deletions

diff --git a/hw/acpi.c b/hw/acpi.c
index fccae69dd6..5928fe74d5 100644
--- a/hw/acpi.c
+++ b/hw/acpi.c
@@ -714,7 +714,9 @@ static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
 #endif
 }
 
-void qemu_system_hot_add_init(void)
+static void piix4_device_hot_add(int bus, int slot, int state);
+
+void piix4_acpi_system_hot_add_init(void)
 {
     register_ioport_write(GPE_BASE, 4, 1, gpe_writeb, &gpe);
     register_ioport_read(GPE_BASE, 4, 1,  gpe_readb, &gpe);
@@ -724,6 +726,8 @@ void qemu_system_hot_add_init(void)
 
     register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, NULL);
     register_ioport_read(PCI_EJ_BASE, 4, 4,  pciej_read, NULL);
+
+    qemu_system_device_hot_add_register(piix4_device_hot_add);
 }
 
 static void enable_device(struct pci_status *p, struct gpe_regs *g, int slot)
@@ -738,7 +742,7 @@ static void disable_device(struct pci_status *p, struct gpe_regs *g, int slot)
     p->down |= (1 << slot);
 }
 
-void qemu_system_device_hot_add(int bus, int slot, int state)
+static void piix4_device_hot_add(int bus, int slot, int state)
 {
     pci0_status.up = 0;
     pci0_status.down = 0;
@@ -752,6 +756,18 @@ void qemu_system_device_hot_add(int bus, int slot, int state)
     }
 }
 
+static qemu_system_device_hot_add_t device_hot_add_callback;
+void qemu_system_device_hot_add_register(qemu_system_device_hot_add_t callback)
+{
+    device_hot_add_callback = callback;
+}
+
+void qemu_system_device_hot_add(int pcibus, int slot, int state)
+{
+    if (device_hot_add_callback)
+        device_hot_add_callback(pcibus, slot, state);
+}
+
 struct acpi_table_header
 {
     char signature [4];    /* ACPI signature (4 ASCII characters) */