iommu_area

Name:iommu_area_alloc

Proto:unsigned long iommu_area_alloc(unsigned long *map, unsigned long size, unsigned long start, unsigned int nr, unsigned long shift, unsigned long boundary_size, unsigned long align_mask)

Type:unsigned long

Parameter:

Type	Parameter	Name
unsigned long *	map
unsigned long	size
unsigned long	start
unsigned int	nr
unsigned long	shift
unsigned long	boundary_size
unsigned long	align_mask

size -= 1

again :

index = map_find_next_zero_area - find a contiguous aligned zero area*@map: The address to base the search on*@size: The bitmap size in bits*@start: The bitnumber to start searching at*@nr: The number of zeroed bits we're looking for*@align_mask: Alignment mask

If index < size Then

If iommu_is_span_boundary(index, nr, shift, boundary_size) Then

start = @a is a power of 2 value (shift + index, boundary_size) - shift

Go to again

bitmap_set(map, index, nr)

Return index

Return -1

**Caller**
Name	Describe
alloc_iommu

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion

Function report