microblaze_v8: io.h IO operations

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 209 insertions, 0 deletions

diff --git a/arch/microblaze/include/asm/io.h b/arch/microblaze/include/asm/io.h
new file mode 100644
index 000000000000..cfab0342588d
--- /dev/null
+++ b/arch/microblaze/include/asm/io.h
@@ -0,0 +1,209 @@
+/*
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASM_MICROBLAZE_IO_H
+#define _ASM_MICROBLAZE_IO_H
+
+#include <asm/byteorder.h>
+#include <asm/page.h>
+#include <linux/types.h>
+#include <asm/page.h>
+
+#define IO_SPACE_LIMIT (0xFFFFFFFF)
+
+static inline unsigned char __raw_readb(const volatile void __iomem *addr)
+{
+        return *(volatile unsigned char __force *)addr;
+}
+static inline unsigned short __raw_readw(const volatile void __iomem *addr)
+{
+        return *(volatile unsigned short __force *)addr;
+}
+static inline unsigned int __raw_readl(const volatile void __iomem *addr)
+{
+        return *(volatile unsigned int __force *)addr;
+}
+static inline unsigned long __raw_readq(const volatile void __iomem *addr)
+{
+        return *(volatile unsigned long __force *)addr;
+}
+static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
+{
+        *(volatile unsigned char __force *)addr = v;
+}
+static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
+{
+        *(volatile unsigned short __force *)addr = v;
+}
+static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
+{
+        *(volatile unsigned int __force *)addr = v;
+}
+static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
+{
+        *(volatile unsigned long __force *)addr = v;
+}
+
+/*
+ * read (readb, readw, readl, readq) and write (writeb, writew,
+ * writel, writeq) accessors are for PCI and thus littel endian.
+ * Linux 2.4 for Microblaze had this wrong.
+ */
+static inline unsigned char readb(const volatile void __iomem *addr)
+{
+        return *(volatile unsigned char __force *)addr;
+}
+static inline unsigned short readw(const volatile void __iomem *addr)
+{
+        return le16_to_cpu(*(volatile unsigned short __force *)addr);
+}
+static inline unsigned int readl(const volatile void __iomem *addr)
+{
+        return le32_to_cpu(*(volatile unsigned int __force *)addr);
+}
+static inline void writeb(unsigned char v, volatile void __iomem *addr)
+{
+        *(volatile unsigned char __force *)addr = v;
+}
+static inline void writew(unsigned short v, volatile void __iomem *addr)
+{
+        *(volatile unsigned short __force *)addr = cpu_to_le16(v);
+}
+static inline void writel(unsigned int v, volatile void __iomem *addr)
+{
+        *(volatile unsigned int __force *)addr = cpu_to_le32(v);
+}
+
+/* ioread and iowrite variants. thease are for now same as __raw_
+ * variants of accessors. we might check for endianess in the feature
+ */
+#define ioread8(addr)           __raw_readb((u8 *)(addr))
+#define ioread16(addr)          __raw_readw((u16 *)(addr))
+#define ioread32(addr)          __raw_readl((u32 *)(addr))
+#define iowrite8(v, addr)       __raw_writeb((u8)(v), (u8 *)(addr))
+#define iowrite16(v, addr)      __raw_writew((u16)(v), (u16 *)(addr))
+#define iowrite32(v, addr)      __raw_writel((u32)(v), (u32 *)(addr))
+
+/* These are the definitions for the x86 IO instructions
+ * inb/inw/inl/outb/outw/outl, the "string" versions
+ * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
+ * inb_p/inw_p/...
+ * The macros don't do byte-swapping.
+ */
+#define inb(port)               readb((u8 *)((port)))
+#define outb(val, port)         writeb((val), (u8 *)((unsigned long)(port)))
+#define inw(port)               readw((u16 *)((port)))
+#define outw(val, port)         writew((val), (u16 *)((unsigned long)(port)))
+#define inl(port)               readl((u32 *)((port)))
+#define outl(val, port)         writel((val), (u32 *)((unsigned long)(port)))
+
+#define inb_p(port)             inb((port))
+#define outb_p(val, port)       outb((val), (port))
+#define inw_p(port)             inw((port))
+#define outw_p(val, port)       outw((val), (port))
+#define inl_p(port)             inl((port))
+#define outl_p(val, port)       outl((val), (port))
+
+#define memset_io(a, b, c)      memset((void *)(a), (b), (c))
+#define memcpy_fromio(a, b, c)  memcpy((a), (void *)(b), (c))
+#define memcpy_toio(a, b, c)    memcpy((void *)(a), (b), (c))
+
+/**
+ *      virt_to_phys - map virtual addresses to physical
+ *      @address: address to remap
+ *
+ *      The returned physical address is the physical (CPU) mapping for
+ *      the memory address given. It is only valid to use this function on
+ *      addresses directly mapped or allocated via kmalloc.
+ *
+ *      This function does not give bus mappings for DMA transfers. In
+ *      almost all conceivable cases a device driver should not be using
+ *      this function
+ */
+static inline unsigned long __iomem virt_to_phys(volatile void *address)
+{
+        return __pa((unsigned long)address);
+}
+
+#define virt_to_bus virt_to_phys
+
+/**
+ *      phys_to_virt - map physical address to virtual
+ *      @address: address to remap
+ *
+ *      The returned virtual address is a current CPU mapping for
+ *      the memory address given. It is only valid to use this function on
+ *      addresses that have a kernel mapping
+ *
+ *      This function does not handle bus mappings for DMA transfers. In
+ *      almost all conceivable cases a device driver should not be using
+ *      this function
+ */
+static inline void *phys_to_virt(unsigned long address)
+{
+        return (void *)__va(address);
+}
+
+#define bus_to_virt(a) phys_to_virt(a)
+
+static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
+                        unsigned long flags)
+{
+        return (void *)address;
+}
+
+#define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
+#define iounmap(addr)           ((void)0)
+#define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
+
+/*
+ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
+ * access
+ */
+#define xlate_dev_mem_ptr(p)    __va(p)
+
+/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
+#define xlate_dev_kmem_ptr(p)   p
+
+/*
+ * Big Endian
+ */
+#define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
+#define out_be16(a, v) __raw_writew((v), (a))
+
+#define in_be32(a) __raw_readl((const void __iomem __force *)(a))
+#define in_be16(a) __raw_readw(a)
+
+/*
+ * Little endian
+ */
+
+#define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a));
+#define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
+
+#define in_le32(a) __le32_to_cpu(__raw_readl(a))
+#define in_le16(a) __le16_to_cpu(__raw_readw(a))
+
+/* Byte ops */
+#define out_8(a, v) __raw_writeb((v), (a))
+#define in_8(a) __raw_readb(a)
+
+/* FIXME */
+static inline void __iomem *ioport_map(unsigned long port, unsigned int len)
+{
+        return (void __iomem *) (port);
+}
+
+static inline void ioport_unmap(void __iomem *addr)
+{
+        /* Nothing to do */
+}
+
+#endif /* _ASM_MICROBLAZE_IO_H */