prep: Move int-ack register from PReP to Raven PCI emulation

Register is one byte-wide (as per specification), so there is no need
to specify endianness.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
[AF: Limit access validity to size 1]
Signed-off-by: Andreas Färber <andreas.faerber@web.de>

1 files changed, 17 insertions, 0 deletions

diff --git a/hw/prep_pci.c b/hw/prep_pci.c
index 8b29da9..38dbff44 100644
--- a/hw/prep_pci.c
+++ b/hw/prep_pci.c
@@ -25,10 +25,12 @@
 #include "hw.h"
 #include "pci.h"
 #include "pci_host.h"
+#include "pc.h"
 #include "exec-memory.h"
 
 typedef struct PRePPCIState {
     PCIHostState host_state;
+    MemoryRegion intack;
     qemu_irq irq[4];
 } PREPPCIState;
 
@@ -67,6 +69,19 @@ static const MemoryRegionOps PPC_PCIIO_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
+static uint64_t ppc_intack_read(void *opaque, target_phys_addr_t addr,
+                                unsigned int size)
+{
+    return pic_read_irq(isa_pic);
+}
+
+static const MemoryRegionOps PPC_intack_ops = {
+    .read = ppc_intack_read,
+    .valid = {
+        .max_access_size = 1,
+    },
+};
+
 static int prep_map_irq(PCIDevice *pci_dev, int irq_num)
 {
     return (irq_num + (pci_dev->devfn >> 3)) & 1;
@@ -110,6 +125,8 @@ static int raven_pcihost_init(SysBusDevice *dev)
     memory_region_init_io(&h->mmcfg, &PPC_PCIIO_ops, s, "pciio", 0x00400000);
     memory_region_add_subregion(address_space_mem, 0x80800000, &h->mmcfg);
 
+    memory_region_init_io(&s->intack, &PPC_intack_ops, s, "pci-intack", 1);
+    memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->intack);
     pci_create_simple(bus, 0, "raven");
 
     return 0;