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
|
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/cacheflush.h>
#include <asm/machdep.h>
#include <asm/mman.h>
#include <asm/tlb.h>
void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
int psize;
struct hstate *hstate = hstate_file(vma->vm_file);
psize = hstate_get_psize(hstate);
radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
}
void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
int psize;
struct hstate *hstate = hstate_file(vma->vm_file);
psize = hstate_get_psize(hstate);
radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
}
void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
int psize;
struct hstate *hstate = hstate_file(vma->vm_file);
psize = hstate_get_psize(hstate);
radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize);
}
/*
* A vairant of hugetlb_get_unmapped_area doing topdown search
* FIXME!! should we do as x86 does or non hugetlb area does ?
* ie, use topdown or not based on mmap_is_legacy check ?
*/
unsigned long
radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
unsigned long len, unsigned long pgoff,
unsigned long flags)
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
struct hstate *h = hstate_file(file);
int fixed = (flags & MAP_FIXED);
unsigned long high_limit;
struct vm_unmapped_area_info info;
high_limit = DEFAULT_MAP_WINDOW;
if (addr >= high_limit || (fixed && (addr + len > high_limit)))
high_limit = TASK_SIZE;
if (len & ~huge_page_mask(h))
return -EINVAL;
if (len > high_limit)
return -ENOMEM;
if (fixed) {
if (addr > high_limit - len)
return -ENOMEM;
if (prepare_hugepage_range(file, addr, len))
return -EINVAL;
return addr;
}
if (addr) {
addr = ALIGN(addr, huge_page_size(h));
vma = find_vma(mm, addr);
if (high_limit - len >= addr &&
(!vma || addr + len <= vm_start_gap(vma)))
return addr;
}
/*
* We are always doing an topdown search here. Slice code
* does that too.
*/
info.flags = VM_UNMAPPED_AREA_TOPDOWN;
info.length = len;
info.low_limit = PAGE_SIZE;
info.high_limit = mm->mmap_base + (high_limit - DEFAULT_MAP_WINDOW);
info.align_mask = PAGE_MASK & ~huge_page_mask(h);
info.align_offset = 0;
return vm_unmapped_area(&info);
}
|
