/usr/include/asm-x86_64/rtai_shm.h is in librtai-dev 3.9.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | /*
* Copyright (C) 1999-2003 Paolo Mantegazza <mantegazza@aero.polimi.it>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _RTAI_ASM_X8664_SHM_H
#define _RTAI_ASM_X8664_SHM_H
#if 0
#ifndef __KERNEL__
#include <asm/rtai_vectors.h>
static inline long long rtai_shmrq(int srq, unsigned long args)
{
long long retval;
RTAI_DO_TRAP(RTAI_SYS_VECTOR, retval, srq, args);
return retval;
}
#endif /* __KERNEL__ */
#include <asm/pgtable.h>
#include <asm/io.h>
#include <rtai_wrappers.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
#define VMALLOC_VMADDR(x) ((unsigned long)(x))
#endif /* >= 2.6.0 */
/* convert virtual user memory address to physical address */
/* (virt_to_phys only works for kmalloced kernel memory) */
static inline unsigned long uvirt_to_kva(pgd_t *pgd, unsigned long adr)
{
unsigned long ret = 0UL;
pmd_t *pmd;
pte_t *ptep, pte;
if(!pgd_none(*pgd)) {
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
pmd = pmd_offset(pgd, adr);
#else /* >= 2.6.11 */
pmd = pmd_offset(pud_offset(pgd, adr), adr);
#endif /* < 2.6.11 */
if (!pmd_none(*pmd)) {
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
ptep = pte_offset(pmd, adr);
#else /* >= 2.6.0 */
ptep = pte_offset_kernel(pmd, adr);
#endif /* < 2.6.0 */
pte = *ptep;
if(pte_present(pte)){
ret = (unsigned long) page_address(pte_page(pte));
ret |= (adr&(PAGE_SIZE-1));
}
}
}
return ret;
}
static inline unsigned long uvirt_to_bus(unsigned long adr)
{
unsigned long kva, ret;
kva = uvirt_to_kva(pgd_offset(current->mm, adr), adr);
ret = virt_to_bus((void *)kva);
return ret;
}
static inline unsigned long kvirt_to_bus(unsigned long adr)
{
unsigned long va, kva, ret;
va = VMALLOC_VMADDR(adr);
kva = uvirt_to_kva(pgd_offset_k(va), va);
ret = virt_to_bus((void *)kva);
return ret;
}
static inline unsigned long kvirt_to_pa(unsigned long adr)
{
unsigned long va, kva, ret;
va = VMALLOC_VMADDR(adr);
kva = uvirt_to_kva(pgd_offset_k(va), va);
ret = __pa(kva);
return ret;
}
#endif
#endif /* !_RTAI_ASM_X8664_SHM_H */
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