pci: add pci_register_bar_simple() API

This is similar to pci_register_bar(), but automatically registers a single
memory region spanning the entire BAR.
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/pci.c

@@ -866,6 +866,7 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num,
     r->filtered_size = size;
     r->type = type;
     r->map_func = map_func;
+    r->ram_addr = IO_MEM_UNASSIGNED;
 
     wmask = ~(size - 1);
     addr = pci_bar(pci_dev, region_num);
@@ -884,6 +885,22 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num,
     }
 }
 
+static void pci_simple_bar_mapfunc(PCIDevice *pci_dev, int region_num,
+                                   pcibus_t addr, pcibus_t size, int type)
+{
+    cpu_register_physical_memory(addr, size,
+                                 pci_dev->io_regions[region_num].ram_addr);
+}
+
+void pci_register_bar_simple(PCIDevice *pci_dev, int region_num,
+                             pcibus_t size,  uint8_t attr, ram_addr_t ram_addr)
+{
+    pci_register_bar(pci_dev, region_num, size,
+                     PCI_BASE_ADDRESS_SPACE_MEMORY | attr,
+                     pci_simple_bar_mapfunc);
+    pci_dev->io_regions[region_num].ram_addr = ram_addr;
+}
+
 static void pci_bridge_filter(PCIDevice *d, pcibus_t *addr, pcibus_t *size,
                               uint8_t type)
 {

hw/pci.h

@@ -92,6 +92,7 @@ typedef struct PCIIORegion {
     pcibus_t filtered_size;
     uint8_t type;
     PCIMapIORegionFunc *map_func;
+    ram_addr_t ram_addr;
 } PCIIORegion;
 
 #define PCI_ROM_SLOT 6
@@ -200,6 +201,8 @@ PCIDevice *pci_register_device(PCIBus *bus, const char *name,
 void pci_register_bar(PCIDevice *pci_dev, int region_num,
                             pcibus_t size, uint8_t type,
                             PCIMapIORegionFunc *map_func);
+void pci_register_bar_simple(PCIDevice *pci_dev, int region_num,
+                             pcibus_t size, uint8_t attr, ram_addr_t ram_addr);
 
 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
                        uint8_t offset, uint8_t size);