Merge tag 'metag-v3.9-rc1-v4' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag

Pull new ImgTec Meta architecture from James Hogan:
 "This adds core architecture support for Imagination's Meta processor
  cores, followed by some later miscellaneous arch/metag cleanups and
  fixes which I kept separate to ease review:

   - Support for basic Meta 1 (ATP) and Meta 2 (HTP) core architecture
   - A few fixes all over, particularly for symbol prefixes
   - A few privilege protection fixes
   - Several cleanups (setup.c includes, split out a lot of
     metag_ksyms.c)
   - Fix some missing exports
   - Convert hugetlb to use vm_unmapped_area()
   - Copy device tree to non-init memory
   - Provide dma_get_sgtable()"

* tag 'metag-v3.9-rc1-v4' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag: (61 commits)
  metag: Provide dma_get_sgtable()
  metag: prom.h: remove declaration of metag_dt_memblock_reserve()
  metag: copy devicetree to non-init memory
  metag: cleanup metag_ksyms.c includes
  metag: move mm/init.c exports out of metag_ksyms.c
  metag: move usercopy.c exports out of metag_ksyms.c
  metag: move setup.c exports out of metag_ksyms.c
  metag: move kick.c exports out of metag_ksyms.c
  metag: move traps.c exports out of metag_ksyms.c
  metag: move irq enable out of irqflags.h on SMP
  genksyms: fix metag symbol prefix on crc symbols
  metag: hugetlb: convert to vm_unmapped_area()
  metag: export clear_page and copy_page
  metag: export metag_code_cache_flush_all
  metag: protect more non-MMU memory regions
  metag: make TXPRIVEXT bits explicit
  metag: kernel/setup.c: sort includes
  perf: Enable building perf tools for Meta
  metag: add boot time LNKGET/LNKSET check
  metag: add __init to metag_cache_probe()
  ...

1 files changed, 165 insertions, 0 deletions

diff --git a/arch/metag/include/asm/io.h b/arch/metag/include/asm/io.h
new file mode 100644
index 00000000000..9359e504844
--- /dev/null
+++ b/arch/metag/include/asm/io.h
@@ -0,0 +1,165 @@
+#ifndef _ASM_METAG_IO_H
+#define _ASM_METAG_IO_H
+
+#include <linux/types.h>
+
+#define IO_SPACE_LIMIT  0
+
+#define page_to_bus page_to_phys
+#define bus_to_page phys_to_page
+
+/*
+ * Generic I/O
+ */
+
+#define __raw_readb __raw_readb
+static inline u8 __raw_readb(const volatile void __iomem *addr)
+{
+	u8 ret;
+	asm volatile("GETB %0,[%1]"
+		     : "=da" (ret)
+		     : "da" (addr)
+		     : "memory");
+	return ret;
+}
+
+#define __raw_readw __raw_readw
+static inline u16 __raw_readw(const volatile void __iomem *addr)
+{
+	u16 ret;
+	asm volatile("GETW %0,[%1]"
+		     : "=da" (ret)
+		     : "da" (addr)
+		     : "memory");
+	return ret;
+}
+
+#define __raw_readl __raw_readl
+static inline u32 __raw_readl(const volatile void __iomem *addr)
+{
+	u32 ret;
+	asm volatile("GETD %0,[%1]"
+		     : "=da" (ret)
+		     : "da" (addr)
+		     : "memory");
+	return ret;
+}
+
+#define __raw_readq __raw_readq
+static inline u64 __raw_readq(const volatile void __iomem *addr)
+{
+	u64 ret;
+	asm volatile("GETL %0,%t0,[%1]"
+		     : "=da" (ret)
+		     : "da" (addr)
+		     : "memory");
+	return ret;
+}
+
+#define __raw_writeb __raw_writeb
+static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
+{
+	asm volatile("SETB [%0],%1"
+		     :
+		     : "da" (addr),
+		       "da" (b)
+		     : "memory");
+}
+
+#define __raw_writew __raw_writew
+static inline void __raw_writew(u16 b, volatile void __iomem *addr)
+{
+	asm volatile("SETW [%0],%1"
+		     :
+		     : "da" (addr),
+		       "da" (b)
+		     : "memory");
+}
+
+#define __raw_writel __raw_writel
+static inline void __raw_writel(u32 b, volatile void __iomem *addr)
+{
+	asm volatile("SETD [%0],%1"
+		     :
+		     : "da" (addr),
+		       "da" (b)
+		     : "memory");
+}
+
+#define __raw_writeq __raw_writeq
+static inline void __raw_writeq(u64 b, volatile void __iomem *addr)
+{
+	asm volatile("SETL [%0],%1,%t1"
+		     :
+		     : "da" (addr),
+		       "da" (b)
+		     : "memory");
+}
+
+/*
+ * The generic io.h can define all the other generic accessors
+ */
+
+#include <asm-generic/io.h>
+
+/*
+ * Despite being a 32bit architecture, Meta can do 64bit memory accesses
+ * (assuming the bus supports it).
+ */
+
+#define readq	__raw_readq
+#define writeq	__raw_writeq
+
+/*
+ * Meta specific I/O for accessing non-MMU areas.
+ *
+ * These can be provided with a physical address rather than an __iomem pointer
+ * and should only be used by core architecture code for accessing fixed core
+ * registers. Generic drivers should use ioremap and the generic I/O accessors.
+ */
+
+#define metag_in8(addr)		__raw_readb((volatile void __iomem *)(addr))
+#define metag_in16(addr)	__raw_readw((volatile void __iomem *)(addr))
+#define metag_in32(addr)	__raw_readl((volatile void __iomem *)(addr))
+#define metag_in64(addr)	__raw_readq((volatile void __iomem *)(addr))
+
+#define metag_out8(b, addr)	__raw_writeb(b, (volatile void __iomem *)(addr))
+#define metag_out16(b, addr)	__raw_writew(b, (volatile void __iomem *)(addr))
+#define metag_out32(b, addr)	__raw_writel(b, (volatile void __iomem *)(addr))
+#define metag_out64(b, addr)	__raw_writeq(b, (volatile void __iomem *)(addr))
+
+/*
+ * io remapping functions
+ */
+
+extern void __iomem *__ioremap(unsigned long offset,
+			       size_t size, unsigned long flags);
+extern void __iounmap(void __iomem *addr);
+
+/**
+ *	ioremap		-	map bus memory into CPU space
+ *	@offset:	bus address of the memory
+ *	@size:		size of the resource to map
+ *
+ *	ioremap performs a platform specific sequence of operations to
+ *	make bus memory CPU accessible via the readb/readw/readl/writeb/
+ *	writew/writel functions and the other mmio helpers. The returned
+ *	address is not guaranteed to be usable directly as a virtual
+ *	address.
+ */
+#define ioremap(offset, size)                   \
+	__ioremap((offset), (size), 0)
+
+#define ioremap_nocache(offset, size)           \
+	__ioremap((offset), (size), 0)
+
+#define ioremap_cached(offset, size)            \
+	__ioremap((offset), (size), _PAGE_CACHEABLE)
+
+#define ioremap_wc(offset, size)                \
+	__ioremap((offset), (size), _PAGE_WR_COMBINE)
+
+#define iounmap(addr)                           \
+	__iounmap(addr)
+
+#endif  /* _ASM_METAG_IO_H */