v4.19.13 snapshot.
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
new file mode 100644
index 0000000..c2e94cf
--- /dev/null
+++ b/arch/mips/pci/pci.c
@@ -0,0 +1,58 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Copyright (C) 2003, 04, 11 Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2011 Wind River Systems,
+ * written by Ralf Baechle (ralf@linux-mips.org)
+ */
+#include <linux/bug.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/of_address.h>
+
+#include <asm/cpu-info.h>
+
+unsigned long PCIBIOS_MIN_IO;
+EXPORT_SYMBOL(PCIBIOS_MIN_IO);
+
+unsigned long PCIBIOS_MIN_MEM;
+EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
+
+static int __init pcibios_set_cache_line_size(void)
+{
+ unsigned int lsize;
+
+ /*
+ * Set PCI cacheline size to that of the highest level in the
+ * cache hierarchy.
+ */
+ lsize = cpu_dcache_line_size();
+ lsize = cpu_scache_line_size() ? : lsize;
+ lsize = cpu_tcache_line_size() ? : lsize;
+
+ BUG_ON(!lsize);
+
+ pci_dfl_cache_line_size = lsize >> 2;
+
+ pr_debug("PCI: pci_cache_line_size set to %d bytes\n", lsize);
+ return 0;
+}
+arch_initcall(pcibios_set_cache_line_size);
+
+void pci_resource_to_user(const struct pci_dev *dev, int bar,
+ const struct resource *rsrc, resource_size_t *start,
+ resource_size_t *end)
+{
+ phys_addr_t size = resource_size(rsrc);
+
+ *start = fixup_bigphys_addr(rsrc->start, size);
+ *end = rsrc->start + size - 1;
+}