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diff --git a/arch/alpha/include/asm/core_polaris.h b/arch/alpha/include/asm/core_polaris.h
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+++ b/arch/alpha/include/asm/core_polaris.h
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+#ifndef __ALPHA_POLARIS__H__
+#define __ALPHA_POLARIS__H__
+
+#include <linux/types.h>
+#include <asm/compiler.h>
+
+/*
+ * POLARIS is the internal name for a core logic chipset which provides
+ * memory controller and PCI access for the 21164PC chip based systems.
+ *
+ * This file is based on:
+ *
+ * Polaris System Controller
+ * Device Functional Specification
+ * 22-Jan-98
+ * Rev. 4.2
+ *
+ */
+
+/* Polaris memory regions */
+#define POLARIS_SPARSE_MEM_BASE (IDENT_ADDR + 0xf800000000UL)
+#define POLARIS_DENSE_MEM_BASE (IDENT_ADDR + 0xf900000000UL)
+#define POLARIS_SPARSE_IO_BASE (IDENT_ADDR + 0xf980000000UL)
+#define POLARIS_SPARSE_CONFIG_BASE (IDENT_ADDR + 0xf9c0000000UL)
+#define POLARIS_IACK_BASE (IDENT_ADDR + 0xf9f8000000UL)
+#define POLARIS_DENSE_IO_BASE (IDENT_ADDR + 0xf9fc000000UL)
+#define POLARIS_DENSE_CONFIG_BASE (IDENT_ADDR + 0xf9fe000000UL)
+
+#define POLARIS_IACK_SC POLARIS_IACK_BASE
+
+/* The Polaris command/status registers live in PCI Config space for
+ * bus 0/device 0. As such, they may be bytes, words, or doublewords.
+ */
+#define POLARIS_W_VENID (POLARIS_DENSE_CONFIG_BASE)
+#define POLARIS_W_DEVID (POLARIS_DENSE_CONFIG_BASE+2)
+#define POLARIS_W_CMD (POLARIS_DENSE_CONFIG_BASE+4)
+#define POLARIS_W_STATUS (POLARIS_DENSE_CONFIG_BASE+6)
+
+/*
+ * Data structure for handling POLARIS machine checks:
+ */
+struct el_POLARIS_sysdata_mcheck {
+ u_long psc_status;
+ u_long psc_pcictl0;
+ u_long psc_pcictl1;
+ u_long psc_pcictl2;
+};
+
+#ifdef __KERNEL__
+
+#ifndef __EXTERN_INLINE
+#define __EXTERN_INLINE extern inline
+#define __IO_EXTERN_INLINE
+#endif
+
+/*
+ * I/O functions:
+ *
+ * POLARIS, the PCI/memory support chipset for the PCA56 (21164PC)
+ * processors, can use either a sparse address mapping scheme, or the
+ * so-called byte-word PCI address space, to get at PCI memory and I/O.
+ *
+ * However, we will support only the BWX form.
+ */
+
+/*
+ * Memory functions. Polaris allows all accesses (byte/word
+ * as well as long/quad) to be done through dense space.
+ *
+ * We will only support DENSE access via BWX insns.
+ */
+
+__EXTERN_INLINE void __iomem *polaris_ioportmap(unsigned long addr)
+{
+ return (void __iomem *)(addr + POLARIS_DENSE_IO_BASE);
+}
+
+__EXTERN_INLINE void __iomem *polaris_ioremap(unsigned long addr,
+ unsigned long size)
+{
+ return (void __iomem *)(addr + POLARIS_DENSE_MEM_BASE);
+}
+
+__EXTERN_INLINE int polaris_is_ioaddr(unsigned long addr)
+{
+ return addr >= POLARIS_SPARSE_MEM_BASE;
+}
+
+__EXTERN_INLINE int polaris_is_mmio(const volatile void __iomem *addr)
+{
+ return (unsigned long)addr < POLARIS_SPARSE_IO_BASE;
+}
+
+#undef __IO_PREFIX
+#define __IO_PREFIX polaris
+#define polaris_trivial_rw_bw 1
+#define polaris_trivial_rw_lq 1
+#define polaris_trivial_io_bw 1
+#define polaris_trivial_io_lq 1
+#define polaris_trivial_iounmap 1
+#include <asm/io_trivial.h>
+
+#ifdef __IO_EXTERN_INLINE
+#undef __EXTERN_INLINE
+#undef __IO_EXTERN_INLINE
+#endif
+
+#endif /* __KERNEL__ */
+
+#endif /* __ALPHA_POLARIS__H__ */