--- /dev/null
+/* io.h: FRV I/O operations
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * 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.
+ *
+ * This gets interesting when talking to the PCI bus - the CPU is in big endian
+ * mode, the PCI bus is little endian and the hardware in the middle can do
+ * byte swapping
+ */
+#ifndef _ASM_IO_H
+#define _ASM_IO_H
+
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+#include <asm/virtconvert.h>
+#include <asm/string.h>
+#include <asm/mb-regs.h>
+#include <linux/delay.h>
+
+/*
+ * swap functions are sometimes needed to interface little-endian hardware
+ */
+
+static inline unsigned short _swapw(unsigned short v)
+{
+ return ((v << 8) | (v >> 8));
+}
+
+static inline unsigned long _swapl(unsigned long v)
+{
+ return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24));
+}
+
+//#define __iormb() asm volatile("membar")
+//#define __iowmb() asm volatile("membar")
+
+#define __raw_readb(addr) __builtin_read8((void *) (addr))
+#define __raw_readw(addr) __builtin_read16((void *) (addr))
+#define __raw_readl(addr) __builtin_read32((void *) (addr))
+
+#define __raw_writeb(datum, addr) __builtin_write8((void *) (addr), datum)
+#define __raw_writew(datum, addr) __builtin_write16((void *) (addr), datum)
+#define __raw_writel(datum, addr) __builtin_write32((void *) (addr), datum)
+
+static inline void io_outsb(unsigned int addr, const void *buf, int len)
+{
+ unsigned long __ioaddr = (unsigned long) addr;
+ const uint8_t *bp = buf;
+
+ while (len--)
+ __builtin_write8((volatile void __iomem *) __ioaddr, *bp++);
+}
+
+static inline void io_outsw(unsigned int addr, const void *buf, int len)
+{
+ unsigned long __ioaddr = (unsigned long) addr;
+ const uint16_t *bp = buf;
+
+ while (len--)
+ __builtin_write16((volatile void __iomem *) __ioaddr, (*bp++));
+}
+
+extern void __outsl_ns(unsigned int addr, const void *buf, int len);
+extern void __outsl_sw(unsigned int addr, const void *buf, int len);
+static inline void __outsl(unsigned int addr, const void *buf, int len, int swap)
+{
+ unsigned long __ioaddr = (unsigned long) addr;
+
+ if (!swap)
+ __outsl_ns(__ioaddr, buf, len);
+ else
+ __outsl_sw(__ioaddr, buf, len);
+}
+
+static inline void io_insb(unsigned long addr, void *buf, int len)
+{
+ uint8_t *bp = buf;
+
+ while (len--)
+ *bp++ = __builtin_read8((volatile void __iomem *) addr);
+}
+
+static inline void io_insw(unsigned long addr, void *buf, int len)
+{
+ uint16_t *bp = buf;
+
+ while (len--)
+ *bp++ = __builtin_read16((volatile void __iomem *) addr);
+}
+
+extern void __insl_ns(unsigned long addr, void *buf, int len);
+extern void __insl_sw(unsigned long addr, void *buf, int len);
+static inline void __insl(unsigned long addr, void *buf, int len, int swap)
+{
+ if (!swap)
+ __insl_ns(addr, buf, len);
+ else
+ __insl_sw(addr, buf, len);
+}
+
+/*
+ * make the short names macros so specific devices
+ * can override them as required
+ */
+
+static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
+{
+ memset((void __force *) addr, val, count);
+}
+
+static inline void memcpy_fromio(void *dst, volatile void __iomem *src, int count)
+{
+ memcpy(dst, (void __force *) src, count);
+}
+
+static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
+{
+ memcpy((void __force *) dst, src, count);
+}
+
+static inline uint8_t inb(unsigned long addr)
+{
+ return __builtin_read8((void *)addr);
+}
+
+static inline uint16_t inw(unsigned long addr)
+{
+ uint16_t ret = __builtin_read16((void *)addr);
+
+ if (__is_PCI_IO(addr))
+ ret = _swapw(ret);
+
+ return ret;
+}
+
+static inline uint32_t inl(unsigned long addr)
+{
+ uint32_t ret = __builtin_read32((void *)addr);
+
+ if (__is_PCI_IO(addr))
+ ret = _swapl(ret);
+
+ return ret;
+}
+
+static inline void outb(uint8_t datum, unsigned long addr)
+{
+ __builtin_write8((void *)addr, datum);
+}
+
+static inline void outw(uint16_t datum, unsigned long addr)
+{
+ if (__is_PCI_IO(addr))
+ datum = _swapw(datum);
+ __builtin_write16((void *)addr, datum);
+}
+
+static inline void outl(uint32_t datum, unsigned long addr)
+{
+ if (__is_PCI_IO(addr))
+ datum = _swapl(datum);
+ __builtin_write32((void *)addr, datum);
+}
+
+#define inb_p(addr) inb(addr)
+#define inw_p(addr) inw(addr)
+#define inl_p(addr) inl(addr)
+#define outb_p(x,addr) outb(x,addr)
+#define outw_p(x,addr) outw(x,addr)
+#define outl_p(x,addr) outl(x,addr)
+
+#define outsb(a,b,l) io_outsb(a,b,l)
+#define outsw(a,b,l) io_outsw(a,b,l)
+#define outsl(a,b,l) __outsl(a,b,l,0)
+
+#define insb(a,b,l) io_insb(a,b,l)
+#define insw(a,b,l) io_insw(a,b,l)
+#define insl(a,b,l) __insl(a,b,l,0)
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+static inline uint8_t readb(const volatile void __iomem *addr)
+{
+ return __builtin_read8((volatile uint8_t __force *) addr);
+}
+
+static inline uint16_t readw(const volatile void __iomem *addr)
+{
+ uint16_t ret = __builtin_read16((volatile uint16_t __force *)addr);
+
+ if (__is_PCI_MEM(addr))
+ ret = _swapw(ret);
+ return ret;
+}
+
+static inline uint32_t readl(const volatile void __iomem *addr)
+{
+ uint32_t ret = __builtin_read32((volatile uint32_t __force *)addr);
+
+ if (__is_PCI_MEM(addr))
+ ret = _swapl(ret);
+
+ return ret;
+}
+
+static inline void writeb(uint8_t datum, volatile void __iomem *addr)
+{
+ __builtin_write8((volatile uint8_t __force *) addr, datum);
+ if (__is_PCI_MEM(addr))
+ __flush_PCI_writes();
+}
+
+static inline void writew(uint16_t datum, volatile void __iomem *addr)
+{
+ if (__is_PCI_MEM(addr))
+ datum = _swapw(datum);
+
+ __builtin_write16((volatile uint16_t __force *) addr, datum);
+ if (__is_PCI_MEM(addr))
+ __flush_PCI_writes();
+}
+
+static inline void writel(uint32_t datum, volatile void __iomem *addr)
+{
+ if (__is_PCI_MEM(addr))
+ datum = _swapl(datum);
+
+ __builtin_write32((volatile uint32_t __force *) addr, datum);
+ if (__is_PCI_MEM(addr))
+ __flush_PCI_writes();
+}
+
+
+/* Values for nocacheflag and cmode */
+#define IOMAP_FULL_CACHING 0
+#define IOMAP_NOCACHE_SER 1
+#define IOMAP_NOCACHE_NONSER 2
+#define IOMAP_WRITETHROUGH 3
+
+extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);
+extern void __iounmap(void __iomem *addr, unsigned long size);
+
+static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
+{
+ return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
+}
+
+static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned long size)
+{
+ return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
+}
+
+static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size)
+{
+ return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
+}
+
+static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size)
+{
+ return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
+}
+
+extern void iounmap(void __iomem *addr);
+
+static inline void flush_write_buffers(void)
+{
+ __asm__ __volatile__ ("membar" : : :"memory");
+}
+
+
+/*
+ * 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
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_IO_H */
git://git.onelab.eu / linux-2.6.git / blobdiff