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/*
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 * Project: S.Ha.R.K.
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 *
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 * Coordinators:
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 *   Giorgio Buttazzo    <giorgio@sssup.it>
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *
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 * Authors     :
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *   Massimiliano Giorgi <massy@gandalf.sssup.it>
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 *   Luca Abeni          <luca@gandalf.sssup.it>
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 *   (see the web pages for full authors list)
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 *
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 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
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 *
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 * http://www.sssup.it
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 * http://retis.sssup.it
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 * http://shark.sssup.it
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 */
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#ifndef __FS_MACCESS_H
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#define __FS_MACCESS_H
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/*+ if defined: the following functions are 'dummy' function +*/
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#define DUMMY_MACCESS
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//#undef  DUMMY_MACCESS
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#ifdef DUMMY_MACCESS
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#include <fs/util.h>
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#endif
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/*
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 * port in/out
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 */
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#include <ll/i386/hw-instr.h>
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/*
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 *
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 * address translation
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 *
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 */
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//#include <x86/xsys.h>
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//#define __lin_to_phy(ptr) appl2linear(ptr)
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//#define __phy_to_lin(addr) linear2appl(addr)
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#define __lin_to_phy(ptr)  ((int)ptr)
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#define __phy_to_lin(addr) ((void*)addr)
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/*
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 *
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 * verify read/write access to user space
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 *
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 */
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#include <arch/sys/cdefs.h>
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__BEGIN_DECLS
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extern int verifyuserread(const void * addr, unsigned long size);
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extern int verifyuserwrite(const void * addr, unsigned long size);
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extern int verifyuserreadnolen(const void *addr);
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#ifdef DUMMY_MACCESS
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#define __verify_write(x,y) (-1)
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#define __verify_read(x,y) (-1)
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#define __verify_read_nolen(x) (1)
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#else
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#define __verify_write(x,y) verifyuserwrite(x,y)
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#define __verify_read(x,y) verifyuserread(x,y)
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#define __verify_read_nolen(x) verifyuserreadnolen(x)
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#endif
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/*
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 *
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 * copy data to/from user space
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 *
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 */
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#ifdef DUMMY_MACCESS
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extern __inline__ void memcpytouser(void *to, void *from, int size)
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{ memcpy(to,from,size); }
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extern __inline__ void memcpyfromuser(void *to, void *from, int size)
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{ memcpy(to,from,size); }
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#define declare_buffer(type,name,maxlen) type *name
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#define init_buffer(name) name=NULL
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#define __copy_from_user(to,from,size) ((to)=(from))
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#define __copy_to_user(to,from,size) memcpy(to,from,size)
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#else
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extern void memcpytouser(void *to, void *from, int size);
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extern void memcpyfromuser(void *to, void *from, int size);
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#define declare_buffer(type,name,maxlen) type name[maxlen]
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#define init_buffer(name)
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#define __copy_from_user(to,from,size) memcpyfromuser(to,from,size)
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#define __copy_to_user(to,from,size) memcpytouser(to,from,size)
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#endif    
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/*
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 *
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 * physical resource allocator
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 *
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 */
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extern int requestiospace(void *startaddr, int size);
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extern int releaseiospace(void *startaddr, int size);
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#ifdef DUMMY_MACCESS
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#define __request_io_space(x,y) (-1)
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#define __release_io_space(x,y)
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#else
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#define __request_io_space(x,y) requestiospace(x,y)
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#define __release_io_space(x,y) releaseiospace(x,y)
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#endif
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__END_DECLS
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#endif