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: Avi Kivity <avi@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/hw/pci.c b/hw/pci.c
index 3ee48715fc..410b67bace 100644
--- a/hw/pci.c
+++ b/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)
 {