[Xen-devel] [v3][PATCH 2/4] hw:i386:pc_piix: split pc_init1()

[Tiejun Chen <tiejun.chen@xxxxxxxxx>]

We'd like to split pc_init1 and then we can share something
with other stuff.

Signed-off-by: Tiejun Chen <tiejun.chen@xxxxxxxxx>
---
 hw/i386/pc_piix.c | 117 +++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 93 insertions(+), 24 deletions(-)

v3:

* Rebase

v2:

* Fix some coding style

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 928c12c..0c40b06 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -71,36 +71,29 @@ static bool smbios_legacy_mode;
 static bool gigabyte_align = true;
 static bool has_reserved_memory = true;
 
-/* PC hardware initialisation */
-static void pc_init1(MachineState *machine,
-                     int pci_enabled,
-                     int kvmclock_enabled)
+static ram_addr_t below_4g_mem_size;
+static ram_addr_t above_4g_mem_size;
+static void pc_machine_base_init(MachineState *machine,
+                                 int pci_enabled,
+                                 int kvmclock_enabled,
+                                 DeviceState **pc_icc_bridge,
+                                 MemoryRegion **pc_ram_memory,
+                                 MemoryRegion **pc_pci_memory,
+                                 qemu_irq **pc_gsi,
+                                 GSIState **pc_gsi_state,
+                                 FWCfgState **pc_fw_cfg)
 {
     PCMachineState *pc_machine = PC_MACHINE(machine);
     MemoryRegion *system_memory = get_system_memory();
-    MemoryRegion *system_io = get_system_io();
-    int i;
-    ram_addr_t below_4g_mem_size, above_4g_mem_size;
-    PCIBus *pci_bus;
-    ISABus *isa_bus;
-    PCII440FXState *i440fx_state;
-    int piix3_devfn = -1;
-    qemu_irq *cpu_irq;
-    qemu_irq *gsi;
-    qemu_irq *i8259;
-    qemu_irq *smi_irq;
-    GSIState *gsi_state;
-    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
-    BusState *idebus[MAX_IDE_BUS];
-    ISADevice *rtc_state;
-    ISADevice *floppy;
-    MemoryRegion *ram_memory;
-    MemoryRegion *pci_memory;
     MemoryRegion *rom_memory;
-    DeviceState *icc_bridge;
-    FWCfgState *fw_cfg = NULL;
     PcGuestInfo *guest_info;
     ram_addr_t lowmem;
+    DeviceState *icc_bridge;
+    MemoryRegion *ram_memory;
+    MemoryRegion *pci_memory;
+    qemu_irq *gsi;
+    GSIState *gsi_state;
+    FWCfgState *fw_cfg;
 
     /* Check whether RAM fits below 4G (leaving 1/2 GByte for IO memory).
      * If it doesn't, we need to split it in chunks below and above 4G.
@@ -193,6 +186,31 @@ static void pc_init1(MachineState *machine,
         gsi = qemu_allocate_irqs(gsi_handler, gsi_state, GSI_NUM_PINS);
     }
 
+    *pc_icc_bridge = icc_bridge;
+    *pc_ram_memory = ram_memory;
+    *pc_pci_memory = pci_memory;
+    *pc_gsi = gsi;
+    *pc_gsi_state = gsi_state;
+    *pc_fw_cfg = fw_cfg;
+}
+
+static void pc_machine_pci_bus_init(MachineState *machine,
+                                    int pci_enabled,
+                                    PCII440FXState **pc_i440fx_state,
+                                    int *pc_piix3_devfn,
+                                    PCIBus **pc_pci_bus,
+                                    ISABus **pc_isa_bus,
+                                    qemu_irq *gsi,
+                                    MemoryRegion *pci_memory,
+                                    MemoryRegion *ram_memory)
+{
+    MemoryRegion *system_memory = get_system_memory();
+    MemoryRegion *system_io = get_system_io();
+    PCII440FXState *i440fx_state;
+    int piix3_devfn;
+    PCIBus *pci_bus;
+    ISABus *isa_bus;
+
     if (pci_enabled) {
         pci_bus = i440fx_init(TYPE_I440FX_PCI_HOST_BRIDGE,
                               TYPE_I440FX_PCI_DEVICE,
@@ -207,6 +225,33 @@ static void pc_init1(MachineState *machine,
         isa_bus = isa_bus_new(NULL, system_io);
         no_hpet = 1;
     }
+
+    *pc_i440fx_state = i440fx_state;
+    *pc_piix3_devfn = piix3_devfn;
+    *pc_pci_bus = pci_bus;
+    *pc_isa_bus = isa_bus;
+}
+
+static void pc_machine_device_init(MachineState *machine,
+                                   int pci_enabled,
+                                   GSIState *gsi_state,
+                                   DeviceState *icc_bridge,
+                                   int piix3_devfn,
+                                   FWCfgState *fw_cfg,
+                                   PCIBus *pci_bus,
+                                   ISABus *isa_bus,
+                                   qemu_irq *gsi)
+{
+    int i;
+    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
+    BusState *idebus[MAX_IDE_BUS];
+    qemu_irq *smi_irq;
+    PCMachineState *pc_machine = PC_MACHINE(machine);
+    qemu_irq *cpu_irq;
+    qemu_irq *i8259;
+    ISADevice *rtc_state;
+    ISADevice *floppy;
+
     isa_bus_irqs(isa_bus, gsi);
 
     if (kvm_irqchip_in_kernel()) {
@@ -294,6 +339,30 @@ static void pc_init1(MachineState *machine,
     }
 }
 
+/* PC hardware initialisation */
+static void pc_init1(MachineState *machine,
+                     int pci_enabled,
+                     int kvmclock_enabled)
+{
+    PCIBus *pci_bus = NULL;
+    ISABus *isa_bus = NULL;
+    PCII440FXState *i440fx_state = NULL;
+    int piix3_devfn = -1;
+    qemu_irq *gsi = NULL;
+    GSIState *gsi_state = NULL;
+    MemoryRegion *ram_memory = NULL;
+    MemoryRegion *pci_memory = NULL;
+    DeviceState *icc_bridge = NULL;
+    FWCfgState *fw_cfg = NULL;
+
+    pc_machine_base_init(machine, pci_enabled, kvmclock_enabled, &icc_bridge,
+                         &ram_memory, &pci_memory, &gsi, &gsi_state, &fw_cfg);
+    pc_machine_pci_bus_init(machine, pci_enabled, &i440fx_state, &piix3_devfn,
+                            &pci_bus, &isa_bus, gsi, pci_memory, ram_memory);
+    pc_machine_device_init(machine, pci_enabled, gsi_state, icc_bridge,
+                           piix3_devfn, fw_cfg, pci_bus, isa_bus, gsi);
+}
+
 static void pc_init_pci(MachineState *machine)
 {
     pc_init1(machine, 1, 1);
-- 
1.9.1


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