qemu: reserve ports
QEMU has a bunch of non-standard virtual devices on various I/O ports.
Allocate resources for them so the coreboot resource management knows
those ports are used.
Change-Id: I51a85967cf2dcd634b0c883210bb52c0c34c8283
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-on: http://review.coreboot.org/3851
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/mainboard/emulation/qemu-i440fx/northbridge.c b/src/mainboard/emulation/qemu-i440fx/northbridge.c
index a3c2f51..f975b6c 100644
--- a/src/mainboard/emulation/qemu-i440fx/northbridge.c
+++ b/src/mainboard/emulation/qemu-i440fx/northbridge.c
@@ -28,6 +28,23 @@
return high;
}
+static void qemu_reserve_ports(struct device *dev, unsigned int idx,
+ unsigned int base, unsigned int size,
+ const char *name)
+{
+ unsigned int end = base + size -1;
+ struct resource *res;
+
+ printk(BIOS_DEBUG, "QEMU: reserve ioports 0x%04x-0x%04x [%s]\n",
+ base, end, name);
+ res = new_resource(dev, idx);
+ res->base = base;
+ res->size = size;
+ res->limit = 0xffff;
+ res->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_STORED |
+ IORESOURCE_ASSIGNED;
+}
+
static void cpu_pci_domain_set_resources(device_t dev)
{
assign_resources(dev->link_list);
@@ -53,6 +70,19 @@
if (high)
ram_resource(dev, idx++, 4 * 1024 * 1024, high);
+ /* Reserve I/O ports used by QEMU */
+ qemu_reserve_ports(dev, idx++, 0x0510, 0x02, "firmware-config");
+ qemu_reserve_ports(dev, idx++, 0x5658, 0x01, "vmware-port");
+ if (i440fx) {
+ qemu_reserve_ports(dev, idx++, 0xae00, 0x10, "pci-hotplug");
+ qemu_reserve_ports(dev, idx++, 0xaf00, 0x20, "cpu-hotplug");
+ qemu_reserve_ports(dev, idx++, 0xafe0, 0x04, "piix4-gpe0");
+ }
+ if (inb(CONFIG_CONSOLE_QEMU_DEBUGCON_PORT) == 0xe9) {
+ qemu_reserve_ports(dev, idx++, CONFIG_CONSOLE_QEMU_DEBUGCON_PORT, 1,
+ "debugcon");
+ }
+
#if !CONFIG_DYNAMIC_CBMEM
/* Leave some space for ACPI, PIRQ and MP tables */
high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;