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00019 #ifndef _RTAI_ASM_I386_SHM_H
00020 #define _RTAI_ASM_I386_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 if (!pgd_none(*pgd) && !pgd_bad(*pgd)) {
00051 pmd_t *pmd;
00052 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
00053 pmd = pmd_offset(pgd, adr);
00054 #else
00055 pmd = pmd_offset(pud_offset(pgd, adr), adr);
00056 #endif
00057 if (!pmd_none(*pmd)) {
00058 pte_t *ptep, pte;
00059 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
00060 ptep = pte_offset(pmd, adr);
00061 #else
00062 ptep = pte_offset_kernel(pmd, adr);
00063 #endif
00064 pte = *ptep;
00065 if (pte_present(pte)) {
00066 return (((unsigned long)page_address(pte_page(pte))) | (adr & (PAGE_SIZE - 1)));
00067 }
00068 }
00069 }
00070 return 0UL;
00071 }
00072
00073 static inline unsigned long kvirt_to_pa(unsigned long adr)
00074 {
00075 return virt_to_phys((void *)uvirt_to_kva(pgd_offset_k(adr), adr));
00076 }
00077
00078 static inline unsigned long uvirt_to_bus(unsigned long adr)
00079 {
00080 return virt_to_bus((void *)uvirt_to_kva(pgd_offset(current->mm, adr), adr));
00081 }
00082
00083 static inline unsigned long kvirt_to_bus(unsigned long adr)
00084 {
00085 unsigned long va;
00086
00087 va = VMALLOC_VMADDR(adr);
00088 return virt_to_bus((void *)uvirt_to_kva(pgd_offset_k(va), va));
00089 }
00090
00091 #endif
00092
00093 #endif