hw/pci-host/piix: Move i440FX declarations to hw/pci-host/i440fx.h

The hw/pci-host/piix.c contains a mix of PIIX3 and i440FX chipsets
functions. To be able to split it, we need to export some
declarations first.

Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>

MAINTAINERS

@@ -1244,6 +1244,7 @@ F: hw/i386/
 F: hw/pci-host/piix.c
 F: hw/pci-host/q35.c
 F: hw/pci-host/pam.c
+F: include/hw/pci-host/i440fx.h
 F: include/hw/pci-host/q35.h
 F: include/hw/pci-host/pam.h
 F: hw/isa/lpc_ich9.c

hw/acpi/pcihp.c

@@ -27,7 +27,7 @@
 #include "qemu/osdep.h"
 #include "hw/acpi/pcihp.h"
 
-#include "hw/i386/pc.h"
+#include "hw/pci-host/i440fx.h"
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_bridge.h"
 #include "hw/acpi/acpi.h"

hw/i386/pc_piix.c

@@ -30,6 +30,7 @@
 #include "hw/i386/x86.h"
 #include "hw/i386/pc.h"
 #include "hw/i386/apic.h"
+#include "hw/pci-host/i440fx.h"
 #include "hw/southbridge/piix.h"
 #include "hw/display/ramfb.h"
 #include "hw/firmware/smbios.h"

hw/pci-host/piix.c

@@ -27,6 +27,7 @@
 #include "hw/irq.h"
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_host.h"
+#include "hw/pci-host/i440fx.h"
 #include "hw/southbridge/piix.h"
 #include "hw/qdev-properties.h"
 #include "hw/isa/isa.h"

include/hw/i386/pc.h

@@ -231,28 +231,6 @@ int cmos_get_fd_drive_type(FloppyDriveType fd0);
 /* hpet.c */
 extern int no_hpet;
 
-/* piix_pci.c */
-struct PCII440FXState;
-typedef struct PCII440FXState PCII440FXState;
-
-#define TYPE_I440FX_PCI_HOST_BRIDGE "i440FX-pcihost"
-#define TYPE_I440FX_PCI_DEVICE "i440FX"
-
-#define TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE "igd-passthrough-i440FX"
-
-PCIBus *i440fx_init(const char *host_type, const char *pci_type,
-                    PCII440FXState **pi440fx_state, int *piix_devfn,
-                    ISABus **isa_bus, qemu_irq *pic,
-                    MemoryRegion *address_space_mem,
-                    MemoryRegion *address_space_io,
-                    ram_addr_t ram_size,
-                    ram_addr_t below_4g_mem_size,
-                    ram_addr_t above_4g_mem_size,
-                    MemoryRegion *pci_memory,
-                    MemoryRegion *ram_memory);
-
-PCIBus *find_i440fx(void);
-
 /* pc_sysfw.c */
 void pc_system_flash_create(PCMachineState *pcms);
 void pc_system_firmware_init(PCMachineState *pcms, MemoryRegion *rom_memory);

include/hw/pci-host/i440fx.h

@@ -0,0 +1,37 @@
+/*
+ * QEMU i440FX North Bridge Emulation
+ *
+ * Copyright (c) 2006 Fabrice Bellard
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef HW_PCI_I440FX_H
+#define HW_PCI_I440FX_H
+
+#include "hw/hw.h"
+#include "hw/pci/pci_bus.h"
+
+typedef struct PCII440FXState PCII440FXState;
+
+#define TYPE_I440FX_PCI_HOST_BRIDGE "i440FX-pcihost"
+#define TYPE_I440FX_PCI_DEVICE "i440FX"
+
+#define TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE "igd-passthrough-i440FX"
+
+PCIBus *i440fx_init(const char *host_type, const char *pci_type,
+                    PCII440FXState **pi440fx_state, int *piix_devfn,
+                    ISABus **isa_bus, qemu_irq *pic,
+                    MemoryRegion *address_space_mem,
+                    MemoryRegion *address_space_io,
+                    ram_addr_t ram_size,
+                    ram_addr_t below_4g_mem_size,
+                    ram_addr_t above_4g_mem_size,
+                    MemoryRegion *pci_memory,
+                    MemoryRegion *ram_memory);
+
+PCIBus *find_i440fx(void);
+
+#endif

stubs/pci-host-piix.c

@@ -1,5 +1,6 @@
 #include "qemu/osdep.h"
-#include "hw/i386/pc.h"
+#include "hw/pci-host/i440fx.h"
+
 PCIBus *find_i440fx(void)
 {
     return NULL;