x86: Add basic Intel Quark processor support

[oweals/u-boot.git] / arch / x86 / cpu / quark / pci.c

diff --git a/arch/x86/cpu/quark/pci.c b/arch/x86/cpu/quark/pci.c
new file mode 100644 (file)
index 0000000..354e15a
--- /dev/null
+++ b/arch/x86/cpu/quark/pci.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <pci.h>
+#include <asm/pci.h>
+#include <asm/arch/device.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void board_pci_setup_hose(struct pci_controller *hose)
+{
+       hose->first_busno = 0;
+       hose->last_busno = 0;
+
+       /* PCI memory space */
+       pci_set_region(hose->regions + 0,
+                      CONFIG_PCI_MEM_BUS,
+                      CONFIG_PCI_MEM_PHYS,
+                      CONFIG_PCI_MEM_SIZE,
+                      PCI_REGION_MEM);
+
+       /* PCI IO space */
+       pci_set_region(hose->regions + 1,
+                      CONFIG_PCI_IO_BUS,
+                      CONFIG_PCI_IO_PHYS,
+                      CONFIG_PCI_IO_SIZE,
+                      PCI_REGION_IO);
+
+       pci_set_region(hose->regions + 2,
+                      CONFIG_PCI_PREF_BUS,
+                      CONFIG_PCI_PREF_PHYS,
+                      CONFIG_PCI_PREF_SIZE,
+                      PCI_REGION_PREFETCH);
+
+       pci_set_region(hose->regions + 3,
+                      0,
+                      0,
+                      gd->ram_size,
+                      PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
+
+       hose->region_count = 4;
+}
+
+int board_pci_post_scan(struct pci_controller *hose)
+{
+       return 0;
+}
+
+int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev)
+{
+       /*
+        * TODO:
+        *
+        * For some unknown reason, the PCI enumeration process hangs
+        * when it scans to the PCIe root port 0 (D23:F0) & 1 (D23:F1).
+        *
+        * For now we just skip these two devices, and this needs to
+        * be revisited later.
+        */
+       if (dev == QUARK_HOST_BRIDGE ||
+           dev == QUARK_PCIE0 || dev == QUARK_PCIE1) {
+               return 1;
+       }
+
+       return 0;
+}