by Brian Gerst

[permalink] [raw]

Subject: [tip:x86/io] x86: Merge io.h

Commit-ID: 1c5b9069e12e20d2fe883076ae0bf73966492108
Gitweb: http://git.kernel.org/tip/1c5b9069e12e20d2fe883076ae0bf73966492108
Author: Brian Gerst <[email protected]>
AuthorDate: Fri, 5 Feb 2010 09:37:09 -0500
Committer: H. Peter Anvin <[email protected]>
CommitDate: Fri, 5 Feb 2010 13:57:40 -0800

x86: Merge io.h

io_32.h and io_64.h are now identical. Merge them into io.h.

Signed-off-by: Brian Gerst <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
---
arch/x86/include/asm/io.h | 155 +++++++++++++++++++++++++++++++++++++++-
arch/x86/include/asm/io_32.h | 161 ------------------------------------------
arch/x86/include/asm/io_64.h | 161 ------------------------------------------
3 files changed, 152 insertions(+), 325 deletions(-)

diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 7373932..a1dcfa3 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -1,8 +1,42 @@
#ifndef _ASM_X86_IO_H
#define _ASM_X86_IO_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 <[email protected]>
+ */
+
#define ARCH_HAS_IOREMAP_WC

+#include <linux/string.h>
#include <linux/compiler.h>
#include <asm-generic/int-ll64.h>
#include <asm/page.h>
@@ -173,11 +207,126 @@ static inline void __iomem *ioremap(resource_size_t offset, unsigned long size)
extern void iounmap(volatile void __iomem *addr);

-#ifdef CONFIG_X86_32
-# include "io_32.h"
+#ifdef __KERNEL__
+
+#include <asm-generic/iomap.h>
+
+#include <linux/vmalloc.h>
+
+/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
+#define xlate_dev_kmem_ptr(p) p
+
+static inline void
+memset_io(volatile void __iomem *addr, unsigned char val, size_t count)
+{
+ memset((void __force *)addr, val, count);
+}
+
+static inline void
+memcpy_fromio(void *dst, const volatile void __iomem *src, size_t count)
+{
+ memcpy(dst, (const void __force *)src, count);
+}
+
+static inline void
+memcpy_toio(volatile void __iomem *dst, const void *src, size_t count)
+{
+ memcpy((void __force *)dst, src, count);
+}
+
+/*
+ * 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))
+
+/*
+ * Cache management
+ *
+ * This needed for two cases
+ * 1. Out of order aware processors
+ * 2. Accidentally out of order processors (PPro errata #51)
+ */
+
+static inline void flush_write_buffers(void)
+{
+#if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE)
+ asm volatile("lock; addl $0,0(%%esp)": : :"memory");
+#endif
+}
+
+#endif /* __KERNEL__ */
+
+extern void native_io_delay(void);
+
+extern int io_delay_type;
+extern void io_delay_init(void);
+
+#if defined(CONFIG_PARAVIRT)
+#include <asm/paravirt.h>
#else
-# include "io_64.h"
+
+static inline void slow_down_io(void)
+{
+ native_io_delay();
+#ifdef REALLY_SLOW_IO
+ native_io_delay();
+ native_io_delay();
+ native_io_delay();
#endif
+}
+
+#endif
+
+#define BUILDIO(bwl, bw, type) \
+static inline void out##bwl(unsigned type value, int port) \
+{ \
+ asm volatile("out" #bwl " %" #bw "0, %w1" \
+ : : "a"(value), "Nd"(port)); \
+} \
+ \
+static inline unsigned type in##bwl(int port) \
+{ \
+ unsigned type value; \
+ asm volatile("in" #bwl " %w1, %" #bw "0" \
+ : "=a"(value) : "Nd"(port)); \
+ return value; \
+} \
+ \
+static inline void out##bwl##_p(unsigned type value, int port) \
+{ \
+ out##bwl(value, port); \
+ slow_down_io(); \
+} \
+ \
+static inline unsigned type in##bwl##_p(int port) \
+{ \
+ unsigned type value = in##bwl(port); \
+ slow_down_io(); \
+ return value; \
+} \
+ \
+static inline void outs##bwl(int port, const void *addr, unsigned long count) \
+{ \
+ asm volatile("rep; outs" #bwl \
+ : "+S"(addr), "+c"(count) : "d"(port)); \
+} \
+ \
+static inline void ins##bwl(int port, void *addr, unsigned long count) \
+{ \
+ asm volatile("rep; ins" #bwl \
+ : "+D"(addr), "+c"(count) : "d"(port)); \
+}
+
+BUILDIO(b, b, char)
+BUILDIO(w, w, short)
+BUILDIO(l, , int)

extern void *xlate_dev_mem_ptr(unsigned long phys);
extern void unxlate_dev_mem_ptr(unsigned long phys, void *addr);
diff --git a/arch/x86/include/asm/io_32.h b/arch/x86/include/asm/io_32.h
deleted file mode 100644
index e8177f3..0000000
--- a/arch/x86/include/asm/io_32.h
+++ /dev/null
@@ -1,161 +0,0 @@
-#ifndef _ASM_X86_IO_32_H
-#define _ASM_X86_IO_32_H
-
-#include <linux/string.h>
-#include <linux/compiler.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 <[email protected]>
- */
-
-#ifdef __KERNEL__
-
-#include <asm-generic/iomap.h>
-
-#include <linux/vmalloc.h>
-
-/*
- * Convert a virtual cached pointer to an uncached pointer
- */
-#define xlate_dev_kmem_ptr(p) p
-
-static inline void
-memset_io(volatile void __iomem *addr, unsigned char val, size_t count)
-{
- memset((void __force *)addr, val, count);
-}
-
-static inline void
-memcpy_fromio(void *dst, const volatile void __iomem *src, size_t count)
-{
- memcpy(dst, (const void __force *)src, count);
-}
-
-static inline void
-memcpy_toio(volatile void __iomem *dst, const void *src, size_t count)
-{
- memcpy((void __force *)dst, src, count);
-}
-
-/*
- * 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))
-
-/*
- * Cache management
- *
- * This needed for two cases
- * 1. Out of order aware processors
- * 2. Accidentally out of order processors (PPro errata #51)
- */
-
-static inline void flush_write_buffers(void)
-{
-#if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE)
- asm volatile("lock; addl $0,0(%%esp)": : :"memory");
-#endif
-}
-
-#endif /* __KERNEL__ */
-
-extern void native_io_delay(void);
-
-extern int io_delay_type;
-extern void io_delay_init(void);
-
-#if defined(CONFIG_PARAVIRT)
-#include <asm/paravirt.h>
-#else
-
-static inline void slow_down_io(void)
-{
- native_io_delay();
-#ifdef REALLY_SLOW_IO
- native_io_delay();
- native_io_delay();
- native_io_delay();
-#endif
-}
-
-#endif
-
-#define BUILDIO(bwl, bw, type) \
-static inline void out##bwl(unsigned type value, int port) \
-{ \
- asm volatile("out" #bwl " %" #bw "0, %w1" \
- : : "a"(value), "Nd"(port)); \
-} \
- \
-static inline unsigned type in##bwl(int port) \
-{ \
- unsigned type value; \
- asm volatile("in" #bwl " %w1, %" #bw "0" \
- : "=a"(value) : "Nd"(port)); \
- return value; \
-} \
- \
-static inline void out##bwl##_p(unsigned type value, int port) \
-{ \
- out##bwl(value, port); \
- slow_down_io(); \
-} \
- \
-static inline unsigned type in##bwl##_p(int port) \
-{ \
- unsigned type value = in##bwl(port); \
- slow_down_io(); \
- return value; \
-} \
- \
-static inline void outs##bwl(int port, const void *addr, unsigned long count) \
-{ \
- asm volatile("rep; outs" #bwl \
- : "+S"(addr), "+c"(count) : "d"(port)); \
-} \
- \
-static inline void ins##bwl(int port, void *addr, unsigned long count) \
-{ \
- asm volatile("rep; ins" #bwl \
- : "+D"(addr), "+c"(count) : "d"(port)); \
-}
-
-BUILDIO(b, b, char)
-BUILDIO(w, w, short)
-BUILDIO(l, , int)
-
-#endif /* _ASM_X86_IO_32_H */
diff --git a/arch/x86/include/asm/io_64.h b/arch/x86/include/asm/io_64.h
deleted file mode 100644
index 6964a1c..0000000
--- a/arch/x86/include/asm/io_64.h
+++ /dev/null
@@ -1,161 +0,0 @@
-#ifndef _ASM_X86_IO_64_H
-#define _ASM_X86_IO_64_H
-
-#include <linux/string.h>
-#include <linux/compiler.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 <[email protected]>
- */
-
-#ifdef __KERNEL__
-
-#include <asm-generic/iomap.h>
-
-#include <linux/vmalloc.h>
-
-/*
- * Convert a virtual cached pointer to an uncached pointer
- */
-#define xlate_dev_kmem_ptr(p) p
-
-static inline void
-memset_io(volatile void __iomem *addr, unsigned char val, size_t count)
-{
- memset((void __force *)addr, val, count);
-}
-
-static inline void
-memcpy_fromio(void *dst, const volatile void __iomem *src, size_t count)
-{
- memcpy(dst, (const void __force *)src, count);
-}
-
-static inline void
-memcpy_toio(volatile void __iomem *dst, const void *src, size_t count)
-{
- memcpy((void __force *)dst, src, count);
-}
-
-/*
- * 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))
-
-/*
- * Cache management
- *
- * This needed for two cases
- * 1. Out of order aware processors
- * 2. Accidentally out of order processors (PPro errata #51)
- */
-
-static inline void flush_write_buffers(void)
-{
-#if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE)
- asm volatile("lock; addl $0,0(%%esp)": : :"memory");
-#endif
-}
-
-#endif /* __KERNEL__ */
-
-extern void native_io_delay(void);
-
-extern int io_delay_type;
-extern void io_delay_init(void);
-
-#if defined(CONFIG_PARAVIRT)
-#include <asm/paravirt.h>
-#else
-
-static inline void slow_down_io(void)
-{
- native_io_delay();
-#ifdef REALLY_SLOW_IO
- native_io_delay();
- native_io_delay();
- native_io_delay();
-#endif
-}
-
-#endif
-
-#define BUILDIO(bwl, bw, type) \
-static inline void out##bwl(unsigned type value, int port) \
-{ \
- asm volatile("out" #bwl " %" #bw "0, %w1" \
- : : "a"(value), "Nd"(port)); \
-} \
- \
-static inline unsigned type in##bwl(int port) \
-{ \
- unsigned type value; \
- asm volatile("in" #bwl " %w1, %" #bw "0" \
- : "=a"(value) : "Nd"(port)); \
- return value; \
-} \
- \
-static inline void out##bwl##_p(unsigned type value, int port) \
-{ \
- out##bwl(value, port); \
- slow_down_io(); \
-} \
- \
-static inline unsigned type in##bwl##_p(int port) \
-{ \
- unsigned type value = in##bwl(port); \
- slow_down_io(); \
- return value; \
-} \
- \
-static inline void outs##bwl(int port, const void *addr, unsigned long count) \
-{ \
- asm volatile("rep; outs" #bwl \
- : "+S"(addr), "+c"(count) : "d"(port)); \
-} \
- \
-static inline void ins##bwl(int port, void *addr, unsigned long count) \
-{ \
- asm volatile("rep; ins" #bwl \
- : "+D"(addr), "+c"(count) : "d"(port)); \
-}
-
-BUILDIO(b, b, char)
-BUILDIO(w, w, short)
-BUILDIO(l, , int)
-
-#endif /* _ASM_X86_IO_64_H */