1 files changed, 341 insertions, 0 deletions

diff --git a/include/asm-x86_64/io.h b/include/asm-x86_64/io.h
new file mode 100644
index 000000000000..94202703fae2
--- /dev/null
+++ b/include/asm-x86_64/io.h
@@ -0,0 +1,341 @@
+#ifndef _ASM_IO_H
+#define _ASM_IO_H
+
+#include <linux/config.h>
+
+/*
+ * This file contains the definitions for the x86 IO instructions
+ * inb/inw/inl/outb/outw/outl and the "string versions" of the same
+ * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
+ * versions of the single-IO instructions (inb_p/inw_p/..).
+ *
+ * This file is not meant to be obfuscating: it's just complicated
+ * to (a) handle it all in a way that makes gcc able to optimize it
+ * as well as possible and (b) trying to avoid writing the same thing
+ * over and over again with slight variations and possibly making a
+ * mistake somewhere.
+ */
+
+/*
+ * Thanks to James van Artsdalen for a better timing-fix than
+ * the two short jumps: using outb's to a nonexistent port seems
+ * to guarantee better timings even on fast machines.
+ *
+ * On the other hand, I'd like to be sure of a non-existent port:
+ * I feel a bit unsafe about using 0x80 (should be safe, though)
+ *
+ *              Linus
+ */
+
+ /*
+  *  Bit simplified and optimized by Jan Hubicka
+  *  Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
+  *
+  *  isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,
+  *  isa_read[wl] and isa_write[wl] fixed
+  *  - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+  */
+
+#define __SLOW_DOWN_IO "\noutb %%al,$0x80"
+
+#ifdef REALLY_SLOW_IO
+#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
+#else
+#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO
+#endif
+
+/*
+ * Talk about misusing macros..
+ */
+#define __OUT1(s,x) \
+extern inline void out##s(unsigned x value, unsigned short port) {
+
+#define __OUT2(s,s1,s2) \
+__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
+
+#define __OUT(s,s1,x) \
+__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \
+__OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));} \
+
+#define __IN1(s) \
+extern inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v;
+
+#define __IN2(s,s1,s2) \
+__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
+
+#define __IN(s,s1,i...) \
+__IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
+__IN1(s##_p) __IN2(s,s1,"w") __FULL_SLOW_DOWN_IO : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
+
+#define __INS(s) \
+extern inline void ins##s(unsigned short port, void * addr, unsigned long count) \
+{ __asm__ __volatile__ ("rep ; ins" #s \
+: "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
+
+#define __OUTS(s) \
+extern inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
+{ __asm__ __volatile__ ("rep ; outs" #s \
+: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
+
+#define RETURN_TYPE unsigned char
+__IN(b,"")
+#undef RETURN_TYPE
+#define RETURN_TYPE unsigned short
+__IN(w,"")
+#undef RETURN_TYPE
+#define RETURN_TYPE unsigned int
+__IN(l,"")
+#undef RETURN_TYPE
+
+__OUT(b,"b",char)
+__OUT(w,"w",short)
+__OUT(l,,int)
+
+__INS(b)
+__INS(w)
+__INS(l)
+
+__OUTS(b)
+__OUTS(w)
+__OUTS(l)
+
+#define IO_SPACE_LIMIT 0xffff
+
+#if defined(__KERNEL__) && __x86_64__
+
+#include <linux/vmalloc.h>
+
+#ifndef __i386__
+/*
+ * Change virtual addresses to physical addresses and vv.
+ * These are pretty trivial
+ */
+extern inline unsigned long virt_to_phys(volatile void * address)
+{
+        return __pa(address);
+}
+
+extern inline void * phys_to_virt(unsigned long address)
+{
+        return __va(address);
+}
+#endif
+
+/*
+ * Change "struct page" to physical address.
+ */
+#ifdef CONFIG_DISCONTIGMEM
+#include <asm/mmzone.h>
+#define page_to_phys(page)    ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
+#else
+#define page_to_phys(page)      ((page - mem_map) << PAGE_SHIFT)
+#endif
+
+#include <asm-generic/iomap.h>
+
+extern void __iomem *__ioremap(unsigned long offset, unsigned long size, unsigned long flags);
+
+extern inline void __iomem * ioremap (unsigned long offset, unsigned long size)
+{
+        return __ioremap(offset, size, 0);
+}
+
+/*
+ * This one maps high address device memory and turns off caching for that area.
+ * it's useful if some control registers are in such an area and write combining
+ * or read caching is not desirable:
+ */
+extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
+extern void iounmap(volatile void __iomem *addr);
+
+/*
+ * 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
+
+/*
+ * However PCI ones are not necessarily 1:1 and therefore these interfaces
+ * are forbidden in portable PCI drivers.
+ *
+ * Allow them on x86 for legacy drivers, though.
+ */
+#define virt_to_bus virt_to_phys
+#define bus_to_virt phys_to_virt
+
+/*
+ * readX/writeX() are used to access memory mapped devices. On some
+ * architectures the memory mapped IO stuff needs to be accessed
+ * differently. On the x86 architecture, we just read/write the
+ * memory location directly.
+ */
+
+static inline __u8 __readb(const volatile void __iomem *addr)
+{
+        return *(__force volatile __u8 *)addr;
+}
+static inline __u16 __readw(const volatile void __iomem *addr)
+{
+        return *(__force volatile __u16 *)addr;
+}
+static inline __u32 __readl(const volatile void __iomem *addr)
+{
+        return *(__force volatile __u32 *)addr;
+}
+static inline __u64 __readq(const volatile void __iomem *addr)
+{
+        return *(__force volatile __u64 *)addr;
+}
+#define readb(x) __readb(x)
+#define readw(x) __readw(x)
+#define readl(x) __readl(x)
+#define readq(x) __readq(x)
+#define readb_relaxed(a) readb(a)
+#define readw_relaxed(a) readw(a)
+#define readl_relaxed(a) readl(a)
+#define readq_relaxed(a) readq(a)
+#define __raw_readb readb
+#define __raw_readw readw
+#define __raw_readl readl
+#define __raw_readq readq
+
+#define mmiowb()
+
+#ifdef CONFIG_UNORDERED_IO
+static inline void __writel(__u32 val, volatile void __iomem *addr)
+{
+        volatile __u32 __iomem *target = addr;
+        asm volatile("movnti %1,%0"
+                     : "=m" (*target)
+                     : "r" (val) : "memory");
+}
+
+static inline void __writeq(__u64 val, volatile void __iomem *addr)
+{
+        volatile __u64 __iomem *target = addr;
+        asm volatile("movnti %1,%0"
+                     : "=m" (*target)
+                     : "r" (val) : "memory");
+}
+#else
+static inline void __writel(__u32 b, volatile void __iomem *addr)
+{
+        *(__force volatile __u32 *)addr = b;
+}
+static inline void __writeq(__u64 b, volatile void __iomem *addr)
+{
+        *(__force volatile __u64 *)addr = b;
+}
+#endif
+static inline void __writeb(__u8 b, volatile void __iomem *addr)
+{
+        *(__force volatile __u8 *)addr = b;
+}
+static inline void __writew(__u16 b, volatile void __iomem *addr)
+{
+        *(__force volatile __u16 *)addr = b;
+}
+#define writeq(val,addr) __writeq((val),(addr))
+#define writel(val,addr) __writel((val),(addr))
+#define writew(val,addr) __writew((val),(addr))
+#define writeb(val,addr) __writeb((val),(addr))
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+#define __raw_writeq writeq
+
+void __memcpy_fromio(void*,unsigned long,unsigned);
+void __memcpy_toio(unsigned long,const void*,unsigned);
+
+static inline void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len)
+{
+        __memcpy_fromio(to,(unsigned long)from,len);
+}
+static inline void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len)
+{
+        __memcpy_toio((unsigned long)to,from,len);
+}
+
+void memset_io(volatile void __iomem *a, int b, size_t c);
+
+/*
+ * ISA space is 'always mapped' on a typical x86 system, no need to
+ * explicitly ioremap() it. The fact that the ISA IO space is mapped
+ * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
+ * are physical addresses. The following constant pointer can be
+ * used as the IO-area pointer (it can be iounmapped as well, so the
+ * analogy with PCI is quite large):
+ */
+#define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET))
+
+#define isa_readb(a) readb(__ISA_IO_base + (a))
+#define isa_readw(a) readw(__ISA_IO_base + (a))
+#define isa_readl(a) readl(__ISA_IO_base + (a))
+#define isa_writeb(b,a) writeb(b,__ISA_IO_base + (a))
+#define isa_writew(w,a) writew(w,__ISA_IO_base + (a))
+#define isa_writel(l,a) writel(l,__ISA_IO_base + (a))
+#define isa_memset_io(a,b,c)            memset_io(__ISA_IO_base + (a),(b),(c))
+#define isa_memcpy_fromio(a,b,c)        memcpy_fromio((a),__ISA_IO_base + (b),(c))
+#define isa_memcpy_toio(a,b,c)          memcpy_toio(__ISA_IO_base + (a),(b),(c))
+
+
+/*
+ * Again, x86-64 does not require mem IO specific function.
+ */
+
+#define eth_io_copy_and_sum(a,b,c,d)            eth_copy_and_sum((a),(void *)(b),(c),(d))
+#define isa_eth_io_copy_and_sum(a,b,c,d)        eth_copy_and_sum((a),(void *)(__ISA_IO_base + (b)),(c),(d))
+
+/**
+ *      check_signature         -       find BIOS signatures
+ *      @io_addr: mmio address to check 
+ *      @signature:  signature block
+ *      @length: length of signature
+ *
+ *      Perform a signature comparison with the mmio address io_addr. This
+ *      address should have been obtained by ioremap.
+ *      Returns 1 on a match.
+ */
+ 
+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;
+}
+
+/* Nothing to do */
+
+#define dma_cache_inv(_start,_size)             do { } while (0)
+#define dma_cache_wback(_start,_size)           do { } while (0)
+#define dma_cache_wback_inv(_start,_size)       do { } while (0)
+
+#define flush_write_buffers() 
+
+extern int iommu_bio_merge;
+#define BIO_VMERGE_BOUNDARY iommu_bio_merge
+
+/*
+ * 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