summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--src/mainboard/emulation/qemu-i440fx/northbridge.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/mainboard/emulation/qemu-i440fx/northbridge.c b/src/mainboard/emulation/qemu-i440fx/northbridge.c
index a2cd37b37b..c87868925c 100644
--- a/src/mainboard/emulation/qemu-i440fx/northbridge.c
+++ b/src/mainboard/emulation/qemu-i440fx/northbridge.c
@@ -54,6 +54,7 @@ static void cpu_pci_domain_read_resources(struct device *dev)
{
u16 nbid = pci_read_config16(dev_find_slot(0, 0), PCI_DEVICE_ID);
int i440fx = (nbid == 0x1237);
+ int q35 = (nbid == 0x29c0);
struct resource *res;
unsigned long tomk = 0, high;
int idx = 10;
@@ -89,6 +90,21 @@ static void cpu_pci_domain_read_resources(struct device *dev)
set_top_of_ram(tomk * 1024);
#endif
+ if (q35 && ((tomk * 1024) < 0xb0000000)) {
+ /*
+ * Reserve the region between top-of-ram and the
+ * mmconf xbar (ar 0xb0000000), so coreboot doesn't
+ * place pci bars there. The region isn't declared as
+ * pci io window in the acpi tables (\_SB.PCI0._CRS).
+ */
+ res = new_resource(dev, idx++);
+ res->base = tomk * 1024;
+ res->size = 0xb0000000 - tomk * 1024;
+ res->limit = 0xffffffff;
+ res->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
+ IORESOURCE_STORED | IORESOURCE_ASSIGNED;
+ }
+
if (i440fx) {
/* Reserve space for the IOAPIC. This should be in
* the southbridge, but I couldn't tell which device