include/asm-x86/io_64.h - kernel/msm-4.19 - Gitiles

 #ifndef _ASM_IO_H
 #define _ASM_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 <acme@conectiva.com.br>
   */

 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

 /*
  * Talk about misusing macros..
  */
 #define __OUT1(s, x)							\
 static inline void out##s(unsigned x value, unsigned short port) {

 #define __OUT2(s, s1, s2)				\
 asm volatile ("out" #s " %" s1 "0,%" s2 "1"

 #ifndef REALLY_SLOW_IO
 #define REALLY_SLOW_IO
 #define UNSET_REALLY_SLOW_IO
 #endif

 #define __OUT(s, s1, x)							\
 	__OUT1(s, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port));	\
 	}								\
 	__OUT1(s##_p, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
 	slow_down_io();							\
 }

 #define __IN1(s)							\
 static 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") : "=a" (_v) : "Nd" (port), ##i);	\
 	slow_down_io(); \
 	return _v; }

 #ifdef UNSET_REALLY_SLOW_IO
 #undef REALLY_SLOW_IO
 #endif

 #define __INS(s)							\
 static 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)							\
 static 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__) && defined(__x86_64__)

 #include <linux/vmalloc.h>

 #ifndef __i386__
 /*
  * Change virtual addresses to physical addresses and vv.
  * These are pretty trivial
  */
 static inline unsigned long virt_to_phys(volatile void *address)
 {
 	return __pa(address);
 }

 static inline void *phys_to_virt(unsigned long address)
 {
 	return __va(address);
 }
 #endif

 /*
  * Change "struct page" to physical address.
  */
 #define page_to_phys(page)    ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)

 #include <asm-generic/iomap.h>

 extern void *early_ioremap(unsigned long addr, unsigned long size);
 extern void early_iounmap(void *addr, unsigned long size);

 /*
  * 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(resource_size_t offset, unsigned long size);
 extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size);

 /*
  * The default ioremap() behavior is non-cached:
  */
 static inline void __iomem *ioremap(resource_size_t offset, unsigned long size)
 {
 	return ioremap_nocache(offset, size);
 }

 extern void iounmap(volatile void __iomem *addr);

 extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);

 /*
  * 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 __always_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()

 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;
 }

 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 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
	#ifndef _ASM_IO_H
	#define _ASM_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 <acme@conectiva.com.br>
	*/

	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

	/*
	* Talk about misusing macros..
	*/
	#define __OUT1(s, x) \
	static inline void out##s(unsigned x value, unsigned short port) {

	#define __OUT2(s, s1, s2) \
	asm volatile ("out" #s " %" s1 "0,%" s2 "1"

	#ifndef REALLY_SLOW_IO
	#define REALLY_SLOW_IO
	#define UNSET_REALLY_SLOW_IO
	#endif

	#define __OUT(s, s1, x) \
	__OUT1(s, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
	} \
	__OUT1(s##_p, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
	slow_down_io(); \
	}

	#define __IN1(s) \
	static 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") : "=a" (_v) : "Nd" (port), ##i); \
	slow_down_io(); \
	return _v; }

	#ifdef UNSET_REALLY_SLOW_IO
	#undef REALLY_SLOW_IO
	#endif

	#define __INS(s) \
	static 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) \
	static 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__) && defined(__x86_64__)

	#include <linux/vmalloc.h>

	#ifndef __i386__
	/*
	* Change virtual addresses to physical addresses and vv.
	* These are pretty trivial
	*/
	static inline unsigned long virt_to_phys(volatile void *address)
	{
	return __pa(address);
	}

	static inline void *phys_to_virt(unsigned long address)
	{
	return __va(address);
	}
	#endif

	/*
	* Change "struct page" to physical address.
	*/
	#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)

	#include <asm-generic/iomap.h>

	extern void *early_ioremap(unsigned long addr, unsigned long size);
	extern void early_iounmap(void *addr, unsigned long size);

	/*
	* 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(resource_size_t offset, unsigned long size);
	extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size);

	/*
	* The default ioremap() behavior is non-cached:
	*/
	static inline void __iomem *ioremap(resource_size_t offset, unsigned long size)
	{
	return ioremap_nocache(offset, size);
	}

	extern void iounmap(volatile void __iomem *addr);

	extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);

	/*
	* 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 __always_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()

	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;
	}

	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 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