1 files changed, 286 insertions, 0 deletions

diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h
new file mode 100644
index 00000000000..69bc7a3e816
--- /dev/null
+++ b/include/asm-arm/io.h
@@ -0,0 +1,286 @@
+/*
+ *  linux/include/asm-arm/io.h
+ *
+ *  Copyright (C) 1996-2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Modifications:
+ *  16-Sep-1996 RMK     Inlined the inx/outx functions & optimised for both
+ *                      constant addresses and variable addresses.
+ *  04-Dec-1997 RMK     Moved a lot of this stuff to the new architecture
+ *                      specific IO header files.
+ *  27-Mar-1999 PJB     Second parameter of memcpy_toio is const..
+ *  04-Apr-1999 PJB     Added check_signature.
+ *  12-Dec-1999 RMK     More cleanups
+ *  18-Jun-2000 RMK     Removed virt_to_* and friends definitions
+ *  05-Oct-2004 BJD     Moved memory string functions to use void __iomem
+ */
+#ifndef __ASM_ARM_IO_H
+#define __ASM_ARM_IO_H
+
+#ifdef __KERNEL__
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+#include <asm/memory.h>
+#include <asm/arch/hardware.h>
+
+/*
+ * ISA I/O bus memory addresses are 1:1 with the physical address.
+ */
+#define isa_virt_to_bus virt_to_phys
+#define isa_page_to_bus page_to_phys
+#define isa_bus_to_virt phys_to_virt
+
+/*
+ * Generic IO read/write.  These perform native-endian accesses.  Note
+ * that some architectures will want to re-define __raw_{read,write}w.
+ */
+extern void __raw_writesb(void __iomem *addr, const void *data, int bytelen);
+extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);
+extern void __raw_writesl(void __iomem *addr, const void *data, int longlen);
+
+extern void __raw_readsb(void __iomem *addr, void *data, int bytelen);
+extern void __raw_readsw(void __iomem *addr, void *data, int wordlen);
+extern void __raw_readsl(void __iomem *addr, void *data, int longlen);
+
+#define __raw_writeb(v,a)       (__chk_io_ptr(a), *(volatile unsigned char __force  *)(a) = (v))
+#define __raw_writew(v,a)       (__chk_io_ptr(a), *(volatile unsigned short __force *)(a) = (v))
+#define __raw_writel(v,a)       (__chk_io_ptr(a), *(volatile unsigned int __force   *)(a) = (v))
+
+#define __raw_readb(a)          (__chk_io_ptr(a), *(volatile unsigned char __force  *)(a))
+#define __raw_readw(a)          (__chk_io_ptr(a), *(volatile unsigned short __force *)(a))
+#define __raw_readl(a)          (__chk_io_ptr(a), *(volatile unsigned int __force   *)(a))
+
+/*
+ * Bad read/write accesses...
+ */
+extern void __readwrite_bug(const char *fn);
+
+/*
+ * Now, pick up the machine-defined IO definitions
+ */
+#include <asm/arch/io.h>
+
+#ifdef __io_pci
+#warning machine class uses buggy __io_pci
+#endif
+#if defined(__arch_putb) || defined(__arch_putw) || defined(__arch_putl) || \
+    defined(__arch_getb) || defined(__arch_getw) || defined(__arch_getl)
+#warning machine class uses old __arch_putw or __arch_getw
+#endif
+
+/*
+ *  IO port access primitives
+ *  -------------------------
+ *
+ * The ARM doesn't have special IO access instructions; all IO is memory
+ * mapped.  Note that these are defined to perform little endian accesses
+ * only.  Their primary purpose is to access PCI and ISA peripherals.
+ *
+ * Note that for a big endian machine, this implies that the following
+ * big endian mode connectivity is in place, as described by numerious
+ * ARM documents:
+ *
+ *    PCI:  D0-D7   D8-D15 D16-D23 D24-D31
+ *    ARM: D24-D31 D16-D23  D8-D15  D0-D7
+ *
+ * The machine specific io.h include defines __io to translate an "IO"
+ * address to a memory address.
+ *
+ * Note that we prevent GCC re-ordering or caching values in expressions
+ * by introducing sequence points into the in*() definitions.  Note that
+ * __raw_* do not guarantee this behaviour.
+ *
+ * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
+ */
+#ifdef __io
+#define outb(v,p)               __raw_writeb(v,__io(p))
+#define outw(v,p)               __raw_writew(cpu_to_le16(v),__io(p))
+#define outl(v,p)               __raw_writel(cpu_to_le32(v),__io(p))
+
+#define inb(p)  ({ unsigned int __v = __raw_readb(__io(p)); __v; })
+#define inw(p)  ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; })
+#define inl(p)  ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; })
+
+#define outsb(p,d,l)            __raw_writesb(__io(p),d,l)
+#define outsw(p,d,l)            __raw_writesw(__io(p),d,l)
+#define outsl(p,d,l)            __raw_writesl(__io(p),d,l)
+
+#define insb(p,d,l)             __raw_readsb(__io(p),d,l)
+#define insw(p,d,l)             __raw_readsw(__io(p),d,l)
+#define insl(p,d,l)             __raw_readsl(__io(p),d,l)
+#endif
+
+#define outb_p(val,port)        outb((val),(port))
+#define outw_p(val,port)        outw((val),(port))
+#define outl_p(val,port)        outl((val),(port))
+#define inb_p(port)             inb((port))
+#define inw_p(port)             inw((port))
+#define inl_p(port)             inl((port))
+
+#define outsb_p(port,from,len)  outsb(port,from,len)
+#define outsw_p(port,from,len)  outsw(port,from,len)
+#define outsl_p(port,from,len)  outsl(port,from,len)
+#define insb_p(port,to,len)     insb(port,to,len)
+#define insw_p(port,to,len)     insw(port,to,len)
+#define insl_p(port,to,len)     insl(port,to,len)
+
+/*
+ * String version of IO memory access ops:
+ */
+extern void _memcpy_fromio(void *, void __iomem *, size_t);
+extern void _memcpy_toio(void __iomem *, const void *, size_t);
+extern void _memset_io(void __iomem *, int, size_t);
+
+#define mmiowb()
+
+/*
+ *  Memory access primitives
+ *  ------------------------
+ *
+ * These perform PCI memory accesses via an ioremap region.  They don't
+ * take an address as such, but a cookie.
+ *
+ * Again, this are defined to perform little endian accesses.  See the
+ * IO port primitives for more information.
+ */
+#ifdef __mem_pci
+#define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; })
+#define readw(c) ({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
+#define readl(c) ({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })
+#define readb_relaxed(addr) readb(addr)
+#define readw_relaxed(addr) readw(addr)
+#define readl_relaxed(addr) readl(addr)
+
+#define readsb(p,d,l)           __raw_readsb(__mem_pci(p),d,l)
+#define readsw(p,d,l)           __raw_readsw(__mem_pci(p),d,l)
+#define readsl(p,d,l)           __raw_readsl(__mem_pci(p),d,l)
+
+#define writeb(v,c)             __raw_writeb(v,__mem_pci(c))
+#define writew(v,c)             __raw_writew(cpu_to_le16(v),__mem_pci(c))
+#define writel(v,c)             __raw_writel(cpu_to_le32(v),__mem_pci(c))
+
+#define writesb(p,d,l)          __raw_writesb(__mem_pci(p),d,l)
+#define writesw(p,d,l)          __raw_writesw(__mem_pci(p),d,l)
+#define writesl(p,d,l)          __raw_writesl(__mem_pci(p),d,l)
+
+#define memset_io(c,v,l)        _memset_io(__mem_pci(c),(v),(l))
+#define memcpy_fromio(a,c,l)    _memcpy_fromio((a),__mem_pci(c),(l))
+#define memcpy_toio(c,a,l)      _memcpy_toio(__mem_pci(c),(a),(l))
+
+#define eth_io_copy_and_sum(s,c,l,b) \
+                                eth_copy_and_sum((s),__mem_pci(c),(l),(b))
+
+static inline int
+check_signature(void __iomem *io_addr, const unsigned char *signature,
+                int length)
+{
+        int retval = 0;
+        do {
+                if (readb(io_addr) != *signature)
+                        goto out;
+                io_addr++;
+                signature++;
+                length--;
+        } while (length);
+        retval = 1;
+out:
+        return retval;
+}
+
+#elif !defined(readb)
+
+#define readb(c)                        (__readwrite_bug("readb"),0)
+#define readw(c)                        (__readwrite_bug("readw"),0)
+#define readl(c)                        (__readwrite_bug("readl"),0)
+#define writeb(v,c)                     __readwrite_bug("writeb")
+#define writew(v,c)                     __readwrite_bug("writew")
+#define writel(v,c)                     __readwrite_bug("writel")
+
+#define eth_io_copy_and_sum(s,c,l,b)    __readwrite_bug("eth_io_copy_and_sum")
+
+#define check_signature(io,sig,len)     (0)
+
+#endif  /* __mem_pci */
+
+/*
+ * If this architecture has ISA IO, then define the isa_read/isa_write
+ * macros.
+ */
+#ifdef __mem_isa
+
+#define isa_readb(addr)                 __raw_readb(__mem_isa(addr))
+#define isa_readw(addr)                 __raw_readw(__mem_isa(addr))
+#define isa_readl(addr)                 __raw_readl(__mem_isa(addr))
+#define isa_writeb(val,addr)            __raw_writeb(val,__mem_isa(addr))
+#define isa_writew(val,addr)            __raw_writew(val,__mem_isa(addr))
+#define isa_writel(val,addr)            __raw_writel(val,__mem_isa(addr))
+#define isa_memset_io(a,b,c)            _memset_io(__mem_isa(a),(b),(c))
+#define isa_memcpy_fromio(a,b,c)        _memcpy_fromio((a),__mem_isa(b),(c))
+#define isa_memcpy_toio(a,b,c)          _memcpy_toio(__mem_isa((a)),(b),(c))
+
+#define isa_eth_io_copy_and_sum(a,b,c,d) \
+                                eth_copy_and_sum((a),__mem_isa(b),(c),(d))
+
+#else   /* __mem_isa */
+
+#define isa_readb(addr)                 (__readwrite_bug("isa_readb"),0)
+#define isa_readw(addr)                 (__readwrite_bug("isa_readw"),0)
+#define isa_readl(addr)                 (__readwrite_bug("isa_readl"),0)
+#define isa_writeb(val,addr)            __readwrite_bug("isa_writeb")
+#define isa_writew(val,addr)            __readwrite_bug("isa_writew")
+#define isa_writel(val,addr)            __readwrite_bug("isa_writel")
+#define isa_memset_io(a,b,c)            __readwrite_bug("isa_memset_io")
+#define isa_memcpy_fromio(a,b,c)        __readwrite_bug("isa_memcpy_fromio")
+#define isa_memcpy_toio(a,b,c)          __readwrite_bug("isa_memcpy_toio")
+
+#define isa_eth_io_copy_and_sum(a,b,c,d) \
+                                __readwrite_bug("isa_eth_io_copy_and_sum")
+
+#endif  /* __mem_isa */
+
+/*
+ * ioremap and friends.
+ *
+ * ioremap takes a PCI memory address, as specified in
+ * Documentation/IO-mapping.txt.
+ */
+extern void __iomem * __ioremap(unsigned long, size_t, unsigned long, unsigned long);
+extern void __iounmap(void __iomem *addr);
+
+#ifndef __arch_ioremap
+#define ioremap(cookie,size)            __ioremap(cookie,size,0,1)
+#define ioremap_nocache(cookie,size)    __ioremap(cookie,size,0,1)
+#define ioremap_cached(cookie,size)     __ioremap(cookie,size,L_PTE_CACHEABLE,1)
+#define iounmap(cookie)                 __iounmap(cookie)
+#else
+#define ioremap(cookie,size)            __arch_ioremap((cookie),(size),0,1)
+#define ioremap_nocache(cookie,size)    __arch_ioremap((cookie),(size),0,1)
+#define ioremap_cached(cookie,size)     __arch_ioremap((cookie),(size),L_PTE_CACHEABLE,1)
+#define iounmap(cookie)                 __arch_iounmap(cookie)
+#endif
+
+/*
+ * can the hardware map this into one segment or not, given no other
+ * constraints.
+ */
+#define BIOVEC_MERGEABLE(vec1, vec2)    \
+        ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2)))
+
+/*
+ * 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_ARM_IO_H */