hw/ppc/pegasos2: Let pegasos2 machine configure SuperI/O functions

This is a preparation for implementing relocation and toggling of SuperI/O
functions in the VT8231 device model. Upon reset, all SuperI/O functions will be
deactivated, so in case if no -bios is given, let the machine configure those
functions the same way Pegasos II firmware would do.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <20240114123911.4877-11-shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/ppc/pegasos2.c

@@ -285,6 +285,12 @@ static void pegasos2_pci_config_write(Pegasos2MachineState *pm, int bus,
     pegasos2_mv_reg_write(pm, pcicfg + 4, len, val);
 }
 
+static void pegasos2_superio_write(uint8_t addr, uint8_t val)
+{
+    cpu_physical_memory_write(PCI1_IO_BASE + 0x3f0, &addr, 1);
+    cpu_physical_memory_write(PCI1_IO_BASE + 0x3f1, &val, 1);
+}
+
 static void pegasos2_machine_reset(MachineState *machine, ShutdownCause reason)
 {
     Pegasos2MachineState *pm = PEGASOS2_MACHINE(machine);
@@ -310,6 +316,12 @@ static void pegasos2_machine_reset(MachineState *machine, ShutdownCause reason)
 
     pegasos2_pci_config_write(pm, 1, (PCI_DEVFN(12, 0) << 8) |
                               PCI_INTERRUPT_LINE, 2, 0x9);
+    pegasos2_pci_config_write(pm, 1, (PCI_DEVFN(12, 0) << 8) |
+                              0x50, 1, 0x6);
+    pegasos2_superio_write(0xf4, 0xbe);
+    pegasos2_superio_write(0xf6, 0xef);
+    pegasos2_superio_write(0xf7, 0xfc);
+    pegasos2_superio_write(0xf2, 0x14);
     pegasos2_pci_config_write(pm, 1, (PCI_DEVFN(12, 0) << 8) |
                               0x50, 1, 0x2);
     pegasos2_pci_config_write(pm, 1, (PCI_DEVFN(12, 0) << 8) |