cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ioctl.h (2646B)

      1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
      2#ifndef _SPARC_IOCTL_H
      3#define _SPARC_IOCTL_H
      4
      5/*
      6 * Our DIR and SIZE overlap in order to simulteneously provide
      7 * a non-zero _IOC_NONE (for binary compatibility) and
      8 * 14 bits of size as on i386. Here's the layout:
      9 *
     10 *   0xE0000000   DIR
     11 *   0x80000000     DIR = WRITE
     12 *   0x40000000     DIR = READ
     13 *   0x20000000     DIR = NONE
     14 *   0x3FFF0000   SIZE (overlaps NONE bit)
     15 *   0x0000FF00   TYPE
     16 *   0x000000FF   NR (CMD)
     17 */
     18
     19#define _IOC_NRBITS      8
     20#define _IOC_TYPEBITS    8
     21#define _IOC_SIZEBITS   13	/* Actually 14, see below. */
     22#define _IOC_DIRBITS     3
     23
     24#define _IOC_NRMASK      ((1 << _IOC_NRBITS)-1)
     25#define _IOC_TYPEMASK    ((1 << _IOC_TYPEBITS)-1)
     26#define _IOC_SIZEMASK    ((1 << _IOC_SIZEBITS)-1)
     27#define _IOC_XSIZEMASK   ((1 << (_IOC_SIZEBITS+1))-1)
     28#define _IOC_DIRMASK     ((1 << _IOC_DIRBITS)-1)
     29
     30#define _IOC_NRSHIFT     0
     31#define _IOC_TYPESHIFT   (_IOC_NRSHIFT + _IOC_NRBITS)
     32#define _IOC_SIZESHIFT   (_IOC_TYPESHIFT + _IOC_TYPEBITS)
     33#define _IOC_DIRSHIFT    (_IOC_SIZESHIFT + _IOC_SIZEBITS)
     34
     35#define _IOC_NONE        1U
     36#define _IOC_READ        2U
     37#define _IOC_WRITE       4U
     38
     39#define _IOC(dir,type,nr,size) \
     40        (((dir)  << _IOC_DIRSHIFT) | \
     41         ((type) << _IOC_TYPESHIFT) | \
     42         ((nr)   << _IOC_NRSHIFT) | \
     43         ((size) << _IOC_SIZESHIFT))
     44
     45#define _IO(type,nr)        _IOC(_IOC_NONE,(type),(nr),0)
     46#define _IOR(type,nr,size)  _IOC(_IOC_READ,(type),(nr),sizeof(size))
     47#define _IOW(type,nr,size)  _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
     48#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
     49
     50/* Used to decode ioctl numbers in drivers despite the leading underscore... */
     51#define _IOC_DIR(nr)    \
     52 ( (((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) != 0)?   \
     53                            (((nr) >> _IOC_DIRSHIFT) & (_IOC_WRITE|_IOC_READ)):  \
     54                            (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) )
     55#define _IOC_TYPE(nr)       (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
     56#define _IOC_NR(nr)         (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
     57#define _IOC_SIZE(nr)   \
     58 ((((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) == 0)?    \
     59                         0: (((nr) >> _IOC_SIZESHIFT) & _IOC_XSIZEMASK))
     60
     61/* ...and for the PCMCIA and sound. */
     62#define IOC_IN          (_IOC_WRITE << _IOC_DIRSHIFT)
     63#define IOC_OUT         (_IOC_READ << _IOC_DIRSHIFT)
     64#define IOC_INOUT       ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
     65#define IOCSIZE_MASK    (_IOC_XSIZEMASK << _IOC_SIZESHIFT)
     66#define IOCSIZE_SHIFT   (_IOC_SIZESHIFT)
     67
     68#endif /* !(_SPARC_IOCTL_H) */