Revert "mb/aopen/dxplplusu: Remove board"
This reverts commit eb76a455cd39ec59b7f2ba28baeec9538befd59e
and applies minor fixes to make it build again.
PARALLEL_MP was working prior to board removal and no
relevant SMI handlers were implemented. So NO_SMM choice
is now selected.
Change-Id: Ia1cd02278240d1b5d006fb2a7730d3d86390f85b
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69339
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/southbridge/intel/i82870/ioapic.c b/src/southbridge/intel/i82870/ioapic.c
new file mode 100644
index 0000000..65fecd1
--- /dev/null
+++ b/src/southbridge/intel/i82870/ioapic.c
@@ -0,0 +1,79 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <arch/ioapic.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <assert.h>
+#include "82870.h"
+
+static int num_p64h2_ioapics = 0;
+
+static void p64h2_ioapic_enable(struct device *dev)
+{
+ /* We have to enable MEM and Bus Master for IOAPIC */
+ uint16_t command = PCI_COMMAND_SERR | PCI_COMMAND_PARITY | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+
+ pci_write_config16(dev, PCI_COMMAND, command);
+}
+
+/**
+ * Configure one of the IOAPICs in a P64H2.
+ *
+ * Note that a PCI bus scan will detect both IOAPICs, so this function
+ * will be called twice for each P64H2 in the system.
+ *
+ * @param dev PCI bus/device/function of P64H2 IOAPIC.
+ * NOTE: There are two IOAPICs per P64H2, at D28:F0 and D30:F0.
+ */
+static void p64h2_ioapic_init(struct device *dev)
+{
+ uint32_t memoryBase;
+ int apic_index, apic_id;
+
+ apic_index = num_p64h2_ioapics;
+ num_p64h2_ioapics++;
+
+ // A note on IOAPIC addresses:
+ // 0 and 1 are used for the local APICs of the dual virtual
+ // (hyper-threaded) CPUs of physical CPU 0 (devicetree.cb).
+ // 6 and 7 are used for the local APICs of the dual virtual
+ // (hyper-threaded) CPUs of physical CPU 1 (devicetree.cb).
+ // 2 is used for the IOAPIC in the 82801 southbridge (hard-coded in i82801xx_lpc.c)
+
+ // Map APIC index into APIC ID
+ // IDs 3, 4, 5, and 8+ are available (see above note)
+
+ if (apic_index < 3)
+ apic_id = apic_index + 3;
+ else
+ apic_id = apic_index + 5;
+
+ ASSERT(apic_id < 16); // ID is only 4 bits
+
+ // Read the MBAR address for setting up the IOAPIC in memory space
+ // NOTE: this address was assigned during enumeration of the bus
+
+ memoryBase = pci_read_config32(dev, PCI_BASE_ADDRESS_0);
+
+ set_ioapic_id((void *)memoryBase, apic_id);
+
+ // Use Processor System Bus to deliver interrupts
+ ioapic_set_boot_config((void *)memoryBase, true);
+}
+
+static struct device_operations ioapic_ops = {
+ .read_resources = pci_dev_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .init = p64h2_ioapic_init,
+ .enable = p64h2_ioapic_enable,
+};
+
+static const struct pci_driver ioapic_driver __pci_driver = {
+ .ops = &ioapic_ops,
+ .vendor = PCI_VID_INTEL,
+ .device = PCI_DID_INTEL_82870_1E0,
+
+};