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00019 #ifndef _RTAI_ASM_X8664_SHM_H
00020 #define _RTAI_ASM_X8664_SHM_H
00021
00022 #if 0
00023
00024 #ifndef __KERNEL__
00025
00026 #include <asm/rtai_vectors.h>
00027
00028 static inline long long rtai_shmrq(int srq, unsigned long args)
00029 {
00030 long long retval;
00031 RTAI_DO_TRAP(RTAI_SYS_VECTOR, retval, srq, args);
00032 return retval;
00033 }
00034
00035 #endif
00036
00037 #include <asm/pgtable.h>
00038 #include <asm/io.h>
00039 #include <rtai_wrappers.h>
00040
00041 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
00042 #define VMALLOC_VMADDR(x) ((unsigned long)(x))
00043 #endif
00044
00045
00046
00047
00048 static inline unsigned long uvirt_to_kva(pgd_t *pgd, unsigned long adr)
00049 {
00050 unsigned long ret = 0UL;
00051 pmd_t *pmd;
00052 pte_t *ptep, pte;
00053
00054 if(!pgd_none(*pgd)) {
00055 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
00056 pmd = pmd_offset(pgd, adr);
00057 #else
00058 pmd = pmd_offset(pud_offset(pgd, adr), adr);
00059 #endif
00060 if (!pmd_none(*pmd)) {
00061 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
00062 ptep = pte_offset(pmd, adr);
00063 #else
00064 ptep = pte_offset_kernel(pmd, adr);
00065 #endif
00066 pte = *ptep;
00067 if(pte_present(pte)){
00068 ret = (unsigned long) page_address(pte_page(pte));
00069 ret |= (adr&(PAGE_SIZE-1));
00070 }
00071 }
00072 }
00073 return ret;
00074 }
00075
00076 static inline unsigned long uvirt_to_bus(unsigned long adr)
00077 {
00078 unsigned long kva, ret;
00079
00080 kva = uvirt_to_kva(pgd_offset(current->mm, adr), adr);
00081 ret = virt_to_bus((void *)kva);
00082
00083 return ret;
00084 }
00085
00086 static inline unsigned long kvirt_to_bus(unsigned long adr)
00087 {
00088 unsigned long va, kva, ret;
00089
00090 va = VMALLOC_VMADDR(adr);
00091 kva = uvirt_to_kva(pgd_offset_k(va), va);
00092 ret = virt_to_bus((void *)kva);
00093
00094 return ret;
00095 }
00096
00097 static inline unsigned long kvirt_to_pa(unsigned long adr)
00098 {
00099 unsigned long va, kva, ret;
00100
00101 va = VMALLOC_VMADDR(adr);
00102 kva = uvirt_to_kva(pgd_offset_k(va), va);
00103 ret = __pa(kva);
00104
00105 return ret;
00106 }
00107
00108 #endif
00109
00110 #endif