v4.19.13 snapshot.
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
new file mode 100644
index 0000000..d63b488
--- /dev/null
+++ b/arch/powerpc/kernel/pci_32.c
@@ -0,0 +1,312 @@
+/*
+ * Common pmac/prep/chrp pci routines. -- Cort
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/capability.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/bootmem.h>
+#include <linux/syscalls.h>
+#include <linux/irq.h>
+#include <linux/list.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/syscalls.h>
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/sections.h>
+#include <asm/pci-bridge.h>
+#include <asm/ppc-pci.h>
+#include <asm/byteorder.h>
+#include <linux/uaccess.h>
+#include <asm/machdep.h>
+
+#undef DEBUG
+
+unsigned long isa_io_base = 0;
+unsigned long pci_dram_offset = 0;
+int pcibios_assign_bus_offset = 1;
+EXPORT_SYMBOL(isa_io_base);
+EXPORT_SYMBOL(pci_dram_offset);
+
+void pcibios_make_OF_bus_map(void);
+
+static void fixup_cpc710_pci64(struct pci_dev* dev);
+static u8* pci_to_OF_bus_map;
+
+/* By default, we don't re-assign bus numbers. We do this only on
+ * some pmacs
+ */
+static int pci_assign_all_buses;
+
+static int pci_bus_count;
+
+/* This will remain NULL for now, until isa-bridge.c is made common
+ * to both 32-bit and 64-bit.
+ */
+struct pci_dev *isa_bridge_pcidev;
+EXPORT_SYMBOL_GPL(isa_bridge_pcidev);
+
+static void
+fixup_cpc710_pci64(struct pci_dev* dev)
+{
+ /* Hide the PCI64 BARs from the kernel as their content doesn't
+ * fit well in the resource management
+ */
+ dev->resource[0].start = dev->resource[0].end = 0;
+ dev->resource[0].flags = 0;
+ dev->resource[1].start = dev->resource[1].end = 0;
+ dev->resource[1].flags = 0;
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixup_cpc710_pci64);
+
+/*
+ * Functions below are used on OpenFirmware machines.
+ */
+static void
+make_one_node_map(struct device_node* node, u8 pci_bus)
+{
+ const int *bus_range;
+ int len;
+
+ if (pci_bus >= pci_bus_count)
+ return;
+ bus_range = of_get_property(node, "bus-range", &len);
+ if (bus_range == NULL || len < 2 * sizeof(int)) {
+ printk(KERN_WARNING "Can't get bus-range for %pOF, "
+ "assuming it starts at 0\n", node);
+ pci_to_OF_bus_map[pci_bus] = 0;
+ } else
+ pci_to_OF_bus_map[pci_bus] = bus_range[0];
+
+ for_each_child_of_node(node, node) {
+ struct pci_dev* dev;
+ const unsigned int *class_code, *reg;
+
+ class_code = of_get_property(node, "class-code", NULL);
+ if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
+ (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
+ continue;
+ reg = of_get_property(node, "reg", NULL);
+ if (!reg)
+ continue;
+ dev = pci_get_domain_bus_and_slot(0, pci_bus,
+ ((reg[0] >> 8) & 0xff));
+ if (!dev || !dev->subordinate) {
+ pci_dev_put(dev);
+ continue;
+ }
+ make_one_node_map(node, dev->subordinate->number);
+ pci_dev_put(dev);
+ }
+}
+
+void
+pcibios_make_OF_bus_map(void)
+{
+ int i;
+ struct pci_controller *hose, *tmp;
+ struct property *map_prop;
+ struct device_node *dn;
+
+ pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL);
+ if (!pci_to_OF_bus_map) {
+ printk(KERN_ERR "Can't allocate OF bus map !\n");
+ return;
+ }
+
+ /* We fill the bus map with invalid values, that helps
+ * debugging.
+ */
+ for (i=0; i<pci_bus_count; i++)
+ pci_to_OF_bus_map[i] = 0xff;
+
+ /* For each hose, we begin searching bridges */
+ list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
+ struct device_node* node = hose->dn;
+
+ if (!node)
+ continue;
+ make_one_node_map(node, hose->first_busno);
+ }
+ dn = of_find_node_by_path("/");
+ map_prop = of_find_property(dn, "pci-OF-bus-map", NULL);
+ if (map_prop) {
+ BUG_ON(pci_bus_count > map_prop->length);
+ memcpy(map_prop->value, pci_to_OF_bus_map, pci_bus_count);
+ }
+ of_node_put(dn);
+#ifdef DEBUG
+ printk("PCI->OF bus map:\n");
+ for (i=0; i<pci_bus_count; i++) {
+ if (pci_to_OF_bus_map[i] == 0xff)
+ continue;
+ printk("%d -> %d\n", i, pci_to_OF_bus_map[i]);
+ }
+#endif
+}
+
+
+/*
+ * Returns the PCI device matching a given OF node
+ */
+int pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
+{
+ struct pci_dev *dev = NULL;
+ const __be32 *reg;
+ int size;
+
+ /* Check if it might have a chance to be a PCI device */
+ if (!pci_find_hose_for_OF_device(node))
+ return -ENODEV;
+
+ reg = of_get_property(node, "reg", &size);
+ if (!reg || size < 5 * sizeof(u32))
+ return -ENODEV;
+
+ *bus = (be32_to_cpup(®[0]) >> 16) & 0xff;
+ *devfn = (be32_to_cpup(®[0]) >> 8) & 0xff;
+
+ /* Ok, here we need some tweak. If we have already renumbered
+ * all busses, we can't rely on the OF bus number any more.
+ * the pci_to_OF_bus_map is not enough as several PCI busses
+ * may match the same OF bus number.
+ */
+ if (!pci_to_OF_bus_map)
+ return 0;
+
+ for_each_pci_dev(dev)
+ if (pci_to_OF_bus_map[dev->bus->number] == *bus &&
+ dev->devfn == *devfn) {
+ *bus = dev->bus->number;
+ pci_dev_put(dev);
+ return 0;
+ }
+
+ return -ENODEV;
+}
+EXPORT_SYMBOL(pci_device_from_OF_node);
+
+/* We create the "pci-OF-bus-map" property now so it appears in the
+ * /proc device tree
+ */
+void __init
+pci_create_OF_bus_map(void)
+{
+ struct property* of_prop;
+ struct device_node *dn;
+
+ of_prop = memblock_virt_alloc(sizeof(struct property) + 256, 0);
+ dn = of_find_node_by_path("/");
+ if (dn) {
+ memset(of_prop, -1, sizeof(struct property) + 256);
+ of_prop->name = "pci-OF-bus-map";
+ of_prop->length = 256;
+ of_prop->value = &of_prop[1];
+ of_add_property(dn, of_prop);
+ of_node_put(dn);
+ }
+}
+
+void pcibios_setup_phb_io_space(struct pci_controller *hose)
+{
+ unsigned long io_offset;
+ struct resource *res = &hose->io_resource;
+
+ /* Fixup IO space offset */
+ io_offset = pcibios_io_space_offset(hose);
+ res->start += io_offset;
+ res->end += io_offset;
+}
+
+static int __init pcibios_init(void)
+{
+ struct pci_controller *hose, *tmp;
+ int next_busno = 0;
+
+ printk(KERN_INFO "PCI: Probing PCI hardware\n");
+
+ if (pci_has_flag(PCI_REASSIGN_ALL_BUS))
+ pci_assign_all_buses = 1;
+
+ /* Scan all of the recorded PCI controllers. */
+ list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
+ if (pci_assign_all_buses)
+ hose->first_busno = next_busno;
+ hose->last_busno = 0xff;
+ pcibios_scan_phb(hose);
+ pci_bus_add_devices(hose->bus);
+ if (pci_assign_all_buses || next_busno <= hose->last_busno)
+ next_busno = hose->last_busno + pcibios_assign_bus_offset;
+ }
+ pci_bus_count = next_busno;
+
+ /* OpenFirmware based machines need a map of OF bus
+ * numbers vs. kernel bus numbers since we may have to
+ * remap them.
+ */
+ if (pci_assign_all_buses)
+ pcibios_make_OF_bus_map();
+
+ /* Call common code to handle resource allocation */
+ pcibios_resource_survey();
+
+ /* Call machine dependent post-init code */
+ if (ppc_md.pcibios_after_init)
+ ppc_md.pcibios_after_init();
+
+ return 0;
+}
+
+subsys_initcall(pcibios_init);
+
+static struct pci_controller*
+pci_bus_to_hose(int bus)
+{
+ struct pci_controller *hose, *tmp;
+
+ list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
+ if (bus >= hose->first_busno && bus <= hose->last_busno)
+ return hose;
+ return NULL;
+}
+
+/* Provide information on locations of various I/O regions in physical
+ * memory. Do this on a per-card basis so that we choose the right
+ * root bridge.
+ * Note that the returned IO or memory base is a physical address
+ */
+
+SYSCALL_DEFINE3(pciconfig_iobase, long, which,
+ unsigned long, bus, unsigned long, devfn)
+{
+ struct pci_controller* hose;
+ long result = -EOPNOTSUPP;
+
+ hose = pci_bus_to_hose(bus);
+ if (!hose)
+ return -ENODEV;
+
+ switch (which) {
+ case IOBASE_BRIDGE_NUMBER:
+ return (long)hose->first_busno;
+ case IOBASE_MEMORY:
+ return (long)hose->mem_offset[0];
+ case IOBASE_IO:
+ return (long)hose->io_base_phys;
+ case IOBASE_ISA_IO:
+ return (long)isa_io_base;
+ case IOBASE_ISA_MEM:
+ return (long)isa_mem_base;
+ }
+
+ return result;
+}