[SeaBIOS] [PATCH 06/12] pciinit: bridges can have two regions too

[Alexey Korolev]

Patch takes into account PCI bar and ROM regions of PCI bridges

Original patch by: Gerd Hoffmann 
Signed-off-by: Kevin O'Connor 
Signed-off-by: Alexey Korolev 
---
 src/pci.h     |    1 +
 src/pciinit.c |    8 +++++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/pci.h b/src/pci.h
index 5598100..6be838c 100644
--- a/src/pci.h
+++ b/src/pci.h
@@ -5,6 +5,7 @@

#define PCI_ROM_SLOT 6
 #define PCI_NUM_REGIONS 7
+#define PCI_BRIDGE_NUM_REGIONS 2

static inline u8 pci_bdf_to_bus(u16 bdf) {
     return bdf >> 8;
diff --git a/src/pciinit.c b/src/pciinit.c
index 2bd4426..9b521e3 100644
--- a/src/pciinit.c
+++ b/src/pciinit.c
@@ -370,13 +370,15 @@ static int pci_bios_check_devices(struct pci_bus *busses)
     // Calculate resources needed for regular (non-bus) devices.
     struct pci_device *pci;
     foreachpci(pci) {
-        if (pci->class == PCI_CLASS_BRIDGE_PCI) {
+        if (pci->class == PCI_CLASS_BRIDGE_PCI)
             busses[pci->secondary_bus].bus_dev = pci;
-            continue;
-        }
+
         struct pci_bus *bus = &busses[pci_bdf_to_bus(pci->bdf)];
         int i;
         for (i = 0; i < PCI_NUM_REGIONS; i++) {
+            if ((pci->class == PCI_CLASS_BRIDGE_PCI) &&
+                (i >= PCI_BRIDGE_NUM_REGIONS && i < PCI_ROM_SLOT))
+                continue;
             u32 val, size;
             pci_bios_get_bar(pci, i, &val, &size);
             if (val == 0)