sun4u: switch m48t59 NVRAM to MMIO access

Real sun4u systems memory-map the NVRAM on the (ISA) ebus, so switch over to
MMIO from ioport access whilst setting the base year to 1968 as used by Sun
systems. This allows all SPARC64 OSs included in my tests to correctly detect
the NVRAM IC and read the hardware clock correctly upon boot.

Note that this also requires a corresponding OpenBIOS update to r1330 in order
to switch the SPARC64 NVRAM accessors over from ioport to MMIO.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

hw/sparc64/sun4u.c

diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index 53aec80..f027caf 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -612,7 +612,7 @@
                              0, 0x1000000);
     pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar0);
     memory_region_init_alias(&s->bar1, OBJECT(s), "bar1", get_system_io(),
-                             0, 0x1000);
+                             0, 0x4000);
     pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &s->bar1);
     return 0;
 }
@@ -825,6 +825,7 @@
     uint64_t initrd_addr, initrd_size, kernel_addr, kernel_size, kernel_entry;
     PCIBus *pci_bus, *pci_bus2, *pci_bus3;
     ISABus *isa_bus;
+    SysBusDevice *s;
     qemu_irq *ivec_irqs, *pbm_irqs;
     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
     DriveInfo *fd[MAX_FD];
@@ -868,8 +869,13 @@
         fd[i] = drive_get(IF_FLOPPY, 0, i);
     }
     fdctrl_init_isa(isa_bus, fd);
-    nvram = m48t59_init_isa(isa_bus, 0x0074, NVRAM_SIZE, 2000, 59);
 
+    /* Map NVRAM into I/O (ebus) space */
+    nvram = m48t59_init(NULL, 0, 0, NVRAM_SIZE, 1968, 59);
+    s = SYS_BUS_DEVICE(nvram);
+    memory_region_add_subregion(get_system_io(), 0x2000,
+                                sysbus_mmio_get_region(s, 0));
+ 
     initrd_size = 0;
     initrd_addr = 0;
     kernel_size = sun4u_load_kernel(machine->kernel_filename,

pc-bios/openbios-ppc

diff --git a/pc-bios/openbios-ppc b/pc-bios/openbios-ppc
index 994052f..91e4193 100644
--- a/pc-bios/openbios-ppc
+++ b/pc-bios/openbios-ppc
Binary files differ

pc-bios/openbios-sparc32

diff --git a/pc-bios/openbios-sparc32 b/pc-bios/openbios-sparc32
index 6d5a381..d693865 100644
--- a/pc-bios/openbios-sparc32
+++ b/pc-bios/openbios-sparc32
Binary files differ

pc-bios/openbios-sparc64

diff --git a/pc-bios/openbios-sparc64 b/pc-bios/openbios-sparc64
index 61bd46b..e5d9e5a 100644
--- a/pc-bios/openbios-sparc64
+++ b/pc-bios/openbios-sparc64
Binary files differ

roms/openbios

diff --git a/roms/openbios b/roms/openbios
index 038aa78..b8dea39 160000
--- a/roms/openbios
+++ b/roms/openbios
@@ -1 +1 @@
-Subproject commit 038aa78d3c331731733378a73e778ee620a5b9da
+Subproject commit b8dea39718916f4d7d391cd1664314d52a45b872