[Qemu-devel] [PATCH 4/4] uninorth: remove token register from uninorth device

[Mark Cave-Ayland]

>From observation of various OS sources it can be seen that the token register
introduced in 4e46dcdbd3 "PPC: Newworld: Add uninorth token register" is not
required, since the only register currently implemented is the uninorth hardware
version which is read-only.

Remove the token register implementation and instead return the uninorth
version corresponding to the hardware.

Signed-off-by: Mark Cave-Ayland <address@hidden>
---
 hw/pci-host/uninorth.c         | 11 +++++------
 include/hw/pci-host/uninorth.h |  4 +++-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/hw/pci-host/uninorth.c b/hw/pci-host/uninorth.c
index a658f9230a..abebfaf755 100644
--- a/hw/pci-host/uninorth.c
+++ b/hw/pci-host/uninorth.c
@@ -524,19 +524,18 @@ static void unin_write(void *opaque, hwaddr addr, 
uint64_t value,
                        unsigned size)
 {
     trace_unin_write(addr, value);
-    if (addr == 0x0) {
-        *(int *)opaque = value;
-    }
 }
 
 static uint64_t unin_read(void *opaque, hwaddr addr, unsigned size)
 {
     uint32_t value;
 
-    value = 0;
     switch (addr) {
     case 0:
-        value = *(int *)opaque;
+        value = UNINORTH_VERSION_10A;
+        break;
+    default:
+        value = 0;
     }
 
     trace_unin_read(addr, value);
@@ -559,7 +558,7 @@ static void unin_init(Object *obj)
     UNINState *s = UNI_NORTH(obj);
     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 
-    memory_region_init_io(&s->mem, obj, &unin_ops, &s->token, "unin", 0x1000);
+    memory_region_init_io(&s->mem, obj, &unin_ops, s, "unin", 0x1000);
 
     sysbus_init_mmio(sbd, &s->mem);
 }
diff --git a/include/hw/pci-host/uninorth.h b/include/hw/pci-host/uninorth.h
index f6654bad9b..2a1cf9f284 100644
--- a/include/hw/pci-host/uninorth.h
+++ b/include/hw/pci-host/uninorth.h
@@ -29,6 +29,9 @@
 
 #include "hw/ppc/openpic.h"
 
+/* UniNorth version */
+#define UNINORTH_VERSION_10A    0x7
+
 #define TYPE_UNI_NORTH_PCI_HOST_BRIDGE "uni-north-pci-pcihost"
 #define TYPE_UNI_NORTH_AGP_HOST_BRIDGE "uni-north-agp-pcihost"
 #define TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE 
"uni-north-internal-pci-pcihost"
@@ -57,7 +60,6 @@ typedef struct UNINState {
     SysBusDevice parent_obj;
 
     MemoryRegion mem;
-    int token[1];
 } UNINState;
 
 #define TYPE_UNI_NORTH "uni-north"
-- 
2.11.0