708 lines
19 KiB
C
708 lines
19 KiB
C
/*
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* Portions Copyright 2008, 2009 and 2011 VMware, Inc.
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*/
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#ifndef _ASM_IO_H
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#define _ASM_IO_H
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/*
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* This file contains the definitions for the x86 IO instructions
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* inb/inw/inl/outb/outw/outl and the "string versions" of the same
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* (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
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* versions of the single-IO instructions (inb_p/inw_p/..).
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*
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* This file is not meant to be obfuscating: it's just complicated
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* to (a) handle it all in a way that makes gcc able to optimize it
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* as well as possible and (b) trying to avoid writing the same thing
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* over and over again with slight variations and possibly making a
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* mistake somewhere.
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*/
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/*
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* Thanks to James van Artsdalen for a better timing-fix than
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* the two short jumps: using outb's to a nonexistent port seems
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* to guarantee better timings even on fast machines.
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*
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* On the other hand, I'd like to be sure of a non-existent port:
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* I feel a bit unsafe about using 0x80 (should be safe, though)
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*
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* Linus
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*/
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/*
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* Bit simplified and optimized by Jan Hubicka
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* Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
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*
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* isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,
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* isa_read[wl] and isa_write[wl] fixed
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* - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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*/
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#define __SLOW_DOWN_IO "\noutb %%al,$0x80"
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#ifdef REALLY_SLOW_IO
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#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
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#else
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#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO
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#endif
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/*
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* In case of any code change below, make sure you
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* go and update the corresponding documentation.
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* The documentation file can be found at
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* vmkdrivers/src_92/doc/dummyDefs.doc
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*
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* outb
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* outb_p
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* outw
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* outl
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* outsw
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*/
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/*
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* Talk about misusing macros..
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*/
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#define __OUT1(s,x) \
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static inline void out##s(unsigned x value, unsigned short port) {
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#if defined(__VMKLNX__)
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#define __OUT2(s,s1,s2) \
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vmk_CPUEnsureClearDF(); \
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__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
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#else /* !defined(__VMKLNX__) */
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#define __OUT2(s,s1,s2) \
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__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
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#endif /* defined(__VMKLNX__) */
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#define __OUT(s,s1,x) \
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__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \
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__OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));} \
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#define __IN1(s) \
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static inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v;
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#if defined(__VMKLNX__)
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#define __IN2(s,s1,s2) \
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vmk_CPUEnsureClearDF(); \
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__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
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#else /* !defined(__VMKLNX__) */
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#define __IN2(s,s1,s2) \
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__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
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#endif /* defined(__VMKLNX__) */
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#define __IN(s,s1,i...) \
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__IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
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__IN1(s##_p) __IN2(s,s1,"w") __FULL_SLOW_DOWN_IO : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
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#if defined(__VMKLNX__)
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#define __INS(s) \
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static inline void ins##s(unsigned short port, void * addr, unsigned long count) \
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{ \
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vmk_CPUEnsureClearDF(); \
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__asm__ __volatile__ ("rep ; ins" #s \
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: "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
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#else /* !defined(__VMKLNX__) */
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#define __INS(s) \
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static inline void ins##s(unsigned short port, void * addr, unsigned long count) \
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{ __asm__ __volatile__ ("rep ; ins" #s \
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: "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
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#endif /* defined(__VMKLNX__) */
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#if defined(__VMKLNX__)
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#define __OUTS(s) \
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static inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
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{ \
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vmk_CPUEnsureClearDF(); \
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__asm__ __volatile__ ("rep ; outs" #s \
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: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
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#else /* !defined(__VMKLNX__) */
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#define __OUTS(s) \
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static inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
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{ __asm__ __volatile__ ("rep ; outs" #s \
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: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
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#endif /* defined(__VMKLNX__) */
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#define RETURN_TYPE unsigned char
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__IN(b,"")
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#undef RETURN_TYPE
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#define RETURN_TYPE unsigned short
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__IN(w,"")
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#undef RETURN_TYPE
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#define RETURN_TYPE unsigned int
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__IN(l,"")
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#undef RETURN_TYPE
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__OUT(b,"b",char)
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__OUT(w,"w",short)
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__OUT(l,,int)
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__INS(b)
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__INS(w)
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__INS(l)
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__OUTS(b)
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__OUTS(w)
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__OUTS(l)
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#define IO_SPACE_LIMIT 0xffff
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#if defined(__KERNEL__) && __x86_64__
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#include <linux/vmalloc.h>
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#ifndef __i386__
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/*
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* Change virtual addresses to physical addresses and vv.
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* These are pretty trivial
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*/
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static inline unsigned long virt_to_phys(volatile void * address)
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{
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return __pa(address);
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}
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static inline void * phys_to_virt(unsigned long address)
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{
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return __va(address);
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}
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#endif
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/*
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* Change "struct page" to page number.
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*/
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#if defined(__VMKLNX__)
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/**
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* phys_to_page - machine address to page handle
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* @maddr : machine address
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*
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* ESX Deviation Notes:
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* The resulting page handle cannot be derefenced. The returned value
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* doesn't correspond to an address of page structure but to the actual page
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* number. This page handle needs to be handled through the page api only.
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*
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*/
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/* _VMKLNX_CODECHECK_: phys_to_page */
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#define phys_to_page(maddr) ((struct page *)pfn_to_page(maddr >> PAGE_SHIFT))
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/**
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* page_to_phys - page handle to machine address
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* @page : page handle
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*
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* Gets the machine address that corresponds to the page parameter
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*
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* ESX Deviation Notes:
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* None.
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*
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* RETURN VALUE:
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* A machine address
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*
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*/
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/* _VMKLNX_CODECHECK_: page_to_phys */
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#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
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#else /* !defined(__VMKLNX__) */
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#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
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#endif /* defined(__VMKLNX__) */
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#include <asm-generic/iomap.h>
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extern void __iomem *__ioremap(unsigned long offset, unsigned long size, unsigned long flags);
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/**
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* ioremap - perform a cachable mapping of a physically contiguous range
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* @offset: physical address to map
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* @size: number of bytes to map
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*
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* Map in a physically contiguous range into kernel virtual memory and
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* get a pointer to the mapped region. The region is mapped cacheable.
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*
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* RETURN VALUE:
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* None.
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*
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*/
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/* _VMKLNX_CODECHECK_: ioremap */
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static inline void __iomem * ioremap (unsigned long offset, unsigned long size)
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{
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return __ioremap(offset, size, 0);
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}
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extern void *early_ioremap(unsigned long addr, unsigned long size);
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extern void early_iounmap(void *addr, unsigned long size);
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/*
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* This one maps high address device memory and turns off caching for that area.
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* it's useful if some control registers are in such an area and write combining
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* or read caching is not desirable:
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*/
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extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
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extern void iounmap(volatile void __iomem *addr);
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/*
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* ISA I/O bus memory addresses are 1:1 with the physical address.
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*/
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#define isa_virt_to_bus virt_to_phys
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#define isa_page_to_bus page_to_phys
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#define isa_bus_to_virt phys_to_virt
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/*
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* However PCI ones are not necessarily 1:1 and therefore these interfaces
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* are forbidden in portable PCI drivers.
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*
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* Allow them on x86 for legacy drivers, though.
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*/
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#if !defined(__VMKLNX__)
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#define virt_to_bus virt_to_phys
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#define bus_to_virt phys_to_virt
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#endif
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/*
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* readX/writeX() are used to access memory mapped devices. On some
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* architectures the memory mapped IO stuff needs to be accessed
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* differently. On the x86 architecture, we just read/write the
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* memory location directly.
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*/
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/**
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* __readb - Read a byte from specified address
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* @addr: memory address to read from
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*
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* Reads a byte from a memory location that is mapped to a
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* device.
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*
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* RETURN VALUE:
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* An 8-bit unsigned byte value
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*
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* SEE ALSO:
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* readb
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*/
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/* _VMKLNX_CODECHECK_: __readb */
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static inline __u8 __readb(const volatile void __iomem *addr)
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{
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return *(__force volatile __u8 *)addr;
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}
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/**
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* __readw - Read a word (16 bits) from specified address
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* @addr: memory address to read from
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*
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* Reads a word (16 bits) from a memory location
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* that is mapped to a device
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*
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* RETURN VALUE:
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* A 16-bit unsigned short word value
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*
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* SEE ALSO:
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* readw
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*/
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/* _VMKLNX_CODECHECK_: __readw */
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static inline __u16 __readw(const volatile void __iomem *addr)
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{
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return *(__force volatile __u16 *)addr;
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}
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/**
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* __readl - Read a long (32 bits) from specified address
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* @addr: memory address to read from
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*
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* Reads a long (32 bits) from a memory location that is
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* mapped to a device
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*
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* RETURN VALUE:
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* A 32-bit unsigned long word value
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*
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* SEE ALSO:
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* readl
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*/
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/* _VMKLNX_CODECHECK_: __readl */
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static __always_inline __u32 __readl(const volatile void __iomem *addr)
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{
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return *(__force volatile __u32 *)addr;
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}
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/**
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* __readq - Read a quad word (64 bits) from specified address
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* @addr: memory address to read from
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*
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* Reads a quad word (64 bits) from a memory location
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* that is mapped to a device
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*
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* RETURN VALUE:
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* A 64-bit unsigned quard word value
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*
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* SEE ALSO:
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* readq
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*/
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/* _VMKLNX_CODECHECK_: __readq */
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static inline __u64 __readq(const volatile void __iomem *addr)
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{
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return *(__force volatile __u64 *)addr;
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}
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/**
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* readb - Read a byte from specified address
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* @x: memory address to read from
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*
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* Reads a byte from a memory location that is mapped to a device.
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* readb is an alias to __readb.
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*
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* RETURN VALUE:
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* An 8-bit unsigned byte value
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*
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* SEE ALSO:
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* __readb
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*/
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/* _VMKLNX_CODECHECK_: readb */
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#define readb(x) __readb(x)
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/**
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* readw - Read a word (16 bits) from specified address
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* @x: memory address to read from
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*
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* Reads a word (16 bits) from a memory location that is mapped to a device.
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* readw is an alias to __readw.
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*
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* RETURN VALUE:
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* A 16-bit unsigned short word value
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*
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* SEE ALSO:
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* __readw
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*/
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/* _VMKLNX_CODECHECK_: readw */
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#define readw(x) __readw(x)
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/**
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* readl - Read a long (32 bits) from specified address
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* @x: memory address to read from
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*
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* Reads a long (32 bits) from a memory location that is mapped to a device.
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* readl is an alias to __readl.
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*
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* RETURN VALUE:
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* A 32-bit unsigned long word value
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*
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* SEE ALSO:
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* __readl
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*/
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/* _VMKLNX_CODECHECK_: readl */
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#define readl(x) __readl(x)
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/**
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* readq - Read a quad word (64 bits) from specified address
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* @x: memory address to read from
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*
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* Reads a quad word (64 bits) from a memory location that is mapped to a device.
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* readq is an alias to __readq.
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*
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* RETURN VALUE:
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* A 64-bit unsigned quard word value
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*
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* SEE ALSO:
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* __readq
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*/
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/* _VMKLNX_CODECHECK_: readq */
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#define readq(x) __readq(x)
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#define readb_relaxed(a) readb(a)
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/**
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* readw_relaxed - Read a word (16 bits) from specified address
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* @a: memory address to read from
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*
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* Reads a word (16 bits) from a memory location that is mapped to a device.
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* readw_relaxed is an alias to __readw.
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*
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* RETURN VALUE:
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* A 16-bit unsigned short word value
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*
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* SEE ALSO:
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* __readw readw
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*/
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/* _VMKLNX_CODECHECK_: readw_relaxed */
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#define readw_relaxed(a) readw(a)
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/**
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* readl_relaxed - Read a long (32 bits) from specified address
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* @a: memory address to read from
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*
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* Reads a long (32 bits) from a memory location that is mapped to a device.
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* readw_relaxed is an alias to __readl.
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*
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* RETURN VALUE:
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* A 32-bit unsigned long word value
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*
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* SEE ALSO:
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* __readl readl
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*/
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/* _VMKLNX_CODECHECK_: readl_relaxed */
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#define readl_relaxed(a) readl(a)
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#define readq_relaxed(a) readq(a)
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#define __raw_readb readb
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#define __raw_readw readw
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#define __raw_readl readl
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#define __raw_readq readq
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#define mmiowb()
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/**
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* __writel - write an u32 value to I/O device memory
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* @b: the u32 value to be written
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* @addr: the iomapped memory address that is obtained from ioremap() or from ioremap_nocache()
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*
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* This is an internal function. Please call writel instead.
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*
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* RETURN VALUE:
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* This function does not return a value.
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*
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* SEE ALSO:
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* ioremap(), ioremap_nocache()
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*
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*/
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/* _VMKLNX_CODECHECK_: __writel */
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static inline void __writel(__u32 b, volatile void __iomem *addr)
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{
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*(__force volatile __u32 *)addr = b;
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}
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/**
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*__writeq - write a u64 value to I/O device memory
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* @b: the u64 value to be written
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* @addr: the iomapped memory address that is obtained from ioremap()
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* or from ioremap_nocache()
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*
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* This is an internal function. Please call writeq instead.
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*
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* RETURN VALUE:
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* This function does not return a value.
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*
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* SEE ALSO:
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* ioremap(), ioremap_nocache()
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*
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*/
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/* _VMKLNX_CODECHECK_: __writeq */
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static inline void __writeq(__u64 b, volatile void __iomem *addr)
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{
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*(__force volatile __u64 *)addr = b;
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}
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/**
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* __writeb - write an u8 value to I/O device memory
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* @b: the u8 value to be written
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* @addr: the iomapped memory address that is obtained from ioremap() or from ioremap_nocache()
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*
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* This is an internal function. Please call writeb instead.
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*
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* RETURN VALUE:
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* This function does not return a value.
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*
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* SEE ALSO:
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* ioremap(), ioremap_nocache()
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*
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*/
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/* _VMKLNX_CODECHECK_: __writeb */
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static inline void __writeb(__u8 b, volatile void __iomem *addr)
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{
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*(__force volatile __u8 *)addr = b;
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}
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/**
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* __writew - write an u16 value to I/O device memory
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* @b: the u16 value to be written
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* @addr: the iomapped memory address that is obtained from ioremap() or from ioremap_nocache()
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*
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* This is an internal function. Please call writew instead.
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*
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* RETURN VALUE:
|
|
* This function does not return a value.
|
|
*
|
|
* SEE ALSO:
|
|
* ioremap(), ioremap_nocache()
|
|
*
|
|
*/
|
|
/* _VMKLNX_CODECHECK_: __writew */
|
|
static inline void __writew(__u16 b, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile __u16 *)addr = b;
|
|
}
|
|
#define writeq(val,addr) __writeq((val),(addr))
|
|
/**
|
|
* writel - write an u32 value to I/O device memory
|
|
* @val: the u32 value to be written
|
|
* @addr: the iomapped memory address that is generated by ioremap() or ioremap_nocache()
|
|
*
|
|
* Write an u32 value to I/O device memory.
|
|
*
|
|
* SYNOPSIS:
|
|
* #define writel(val,addr)
|
|
*
|
|
* RETURN VALUE:
|
|
* This function does not return a value.
|
|
*
|
|
* SEE ALSO:
|
|
* ioremap(), ioremap_nocache()
|
|
*
|
|
*/
|
|
/* _VMKLNX_CODECHECK_: writel */
|
|
#define writel(val,addr) __writel((val),(addr))
|
|
|
|
/**
|
|
* writew - write an u16 value to I/O device memory
|
|
* @val: the u16 value to be written
|
|
* @addr: the iomapped memory address that is obtained from ioremap() or from ioremap_nocache()
|
|
*
|
|
* Write an u16 value to I/O device memory.
|
|
*
|
|
* SYNOPSIS:
|
|
* #define writew(val,addr)
|
|
*
|
|
* RETURN VALUE:
|
|
* This function does not return a value.
|
|
*
|
|
* SEE ALSO:
|
|
* ioremap(), ioremap_nocache()
|
|
*
|
|
*/
|
|
/* _VMKLNX_CODECHECK_: writew */
|
|
#define writew(val,addr) __writew((val),(addr))
|
|
|
|
/**
|
|
* writeb - write an u8 value to I/O device memory
|
|
* @val: the u8 value to be written
|
|
* @addr: the iomapped memory address that is generated by ioremap() or ioremap_nocache()
|
|
*
|
|
* Write an u8 value to I/O device memory.
|
|
*
|
|
* SYNOPSIS:
|
|
* #define writeb(val,addr)
|
|
*
|
|
* RETURN VALUE:
|
|
* This function does not return a value.
|
|
*
|
|
* SEE ALSO:
|
|
* ioremap(), ioremap_nocache()
|
|
*
|
|
*/
|
|
/* _VMKLNX_CODECHECK_: writeb */
|
|
#define writeb(val,addr) __writeb((val),(addr))
|
|
#define __raw_writeb writeb
|
|
#define __raw_writew writew
|
|
#define __raw_writel writel
|
|
#define __raw_writeq writeq
|
|
|
|
#if defined(__VMKLNX__)
|
|
/**
|
|
* memcpy_fromio - copy from an IO device space to main memory space
|
|
* @from: the address for the IO Device in PCI space
|
|
* @to: the address to where the copy is to happen
|
|
* @len: the number of bytes to be copied
|
|
*
|
|
* Copy @len bytes from @from address of an IO device in the PCI space to
|
|
* @to address in main memory space
|
|
*
|
|
* RETURN VALUE:
|
|
* None
|
|
*/
|
|
/* _VMKLNX_CODECHECK_: memcpy_fromio */
|
|
static inline void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len)
|
|
{
|
|
vmk_Memcpy(to, (void *)from, len);
|
|
}
|
|
|
|
/**
|
|
* memcpy_toio - copy from main memory space to IO device space
|
|
* @to: the address for the IO Device in PCI space
|
|
* @from: the address from where the copy is to happen
|
|
* @len: the number of bytes to be copied
|
|
*
|
|
* Copy @len bytes from @from address to @to address of a IO Device in the PCI
|
|
* space.
|
|
*
|
|
* RETURN VALUE
|
|
* None
|
|
*/
|
|
/* _VMKLNX_CODECHECK_: memcpy_toio */
|
|
static inline void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len)
|
|
{
|
|
vmk_Memcpy((void *)to, from, len);
|
|
}
|
|
#else /* !defined(__VMKLNX__) */
|
|
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);
|
|
}
|
|
#endif /* defined(__VMKLNX__) */
|
|
|
|
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))
|
|
|
|
/*
|
|
* 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))
|
|
|
|
/**
|
|
* 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
|