mirror of
https://git.rtems.org/rtems-libbsd/
synced 2025-05-14 06:19:16 +08:00
6514d56158
- Refactor the libio interface - Move syscalls into an rtemsbsd location - Provide a root directory mount point Update #4475
17 lines
576 B
C
17 lines
576 B
C
#ifndef RTEMS_VM_OBJCT_H
|
|
#define RTEMS_VM_OBJCT_H
|
|
|
|
/*
|
|
* Helpers to perform conversion between vm_object page indexes and offsets.
|
|
* IDX_TO_OFF() converts an index into an offset.
|
|
* OFF_TO_IDX() converts an offset into an index.
|
|
* OBJ_MAX_SIZE specifies the maximum page index corresponding to the
|
|
* maximum unsigned offset.
|
|
*/
|
|
#define IDX_TO_OFF(idx) (((vm_ooffset_t)(idx)) << PAGE_SHIFT)
|
|
#define OFF_TO_IDX(off) ((vm_pindex_t)(((vm_ooffset_t)(off)) >> PAGE_SHIFT))
|
|
#define UOFF_TO_IDX(off) OFF_TO_IDX(off)
|
|
#define OBJ_MAX_SIZE (OFF_TO_IDX(UINT64_MAX) + 1)
|
|
|
|
#endif
|