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48483760 AK |
1 | #include <linux/mm.h> |
2 | #include <linux/hugetlb.h> | |
3 | #include <asm/pgtable.h> | |
4 | #include <asm/pgalloc.h> | |
5 | #include <asm/cacheflush.h> | |
6 | #include <asm/machdep.h> | |
7 | #include <asm/mman.h> | |
8 | ||
9 | void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) | |
10 | { | |
11 | unsigned long ap, shift; | |
12 | struct hstate *hstate = hstate_file(vma->vm_file); | |
13 | ||
14 | shift = huge_page_shift(hstate); | |
15 | if (shift == mmu_psize_defs[MMU_PAGE_2M].shift) | |
16 | ap = mmu_get_ap(MMU_PAGE_2M); | |
17 | else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift) | |
18 | ap = mmu_get_ap(MMU_PAGE_1G); | |
19 | else { | |
20 | WARN(1, "Wrong huge page shift\n"); | |
21 | return ; | |
22 | } | |
f22dfc91 | 23 | radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, ap); |
48483760 AK |
24 | } |
25 | ||
26 | void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) | |
27 | { | |
28 | unsigned long ap, shift; | |
29 | struct hstate *hstate = hstate_file(vma->vm_file); | |
30 | ||
31 | shift = huge_page_shift(hstate); | |
32 | if (shift == mmu_psize_defs[MMU_PAGE_2M].shift) | |
33 | ap = mmu_get_ap(MMU_PAGE_2M); | |
34 | else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift) | |
35 | ap = mmu_get_ap(MMU_PAGE_1G); | |
36 | else { | |
37 | WARN(1, "Wrong huge page shift\n"); | |
38 | return ; | |
39 | } | |
f22dfc91 | 40 | radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, ap); |
48483760 AK |
41 | } |
42 | ||
43 | /* | |
44 | * A vairant of hugetlb_get_unmapped_area doing topdown search | |
45 | * FIXME!! should we do as x86 does or non hugetlb area does ? | |
46 | * ie, use topdown or not based on mmap_is_legacy check ? | |
47 | */ | |
48 | unsigned long | |
49 | radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
50 | unsigned long len, unsigned long pgoff, | |
51 | unsigned long flags) | |
52 | { | |
53 | struct mm_struct *mm = current->mm; | |
54 | struct vm_area_struct *vma; | |
55 | struct hstate *h = hstate_file(file); | |
56 | struct vm_unmapped_area_info info; | |
57 | ||
58 | if (len & ~huge_page_mask(h)) | |
59 | return -EINVAL; | |
60 | if (len > TASK_SIZE) | |
61 | return -ENOMEM; | |
62 | ||
63 | if (flags & MAP_FIXED) { | |
64 | if (prepare_hugepage_range(file, addr, len)) | |
65 | return -EINVAL; | |
66 | return addr; | |
67 | } | |
68 | ||
69 | if (addr) { | |
70 | addr = ALIGN(addr, huge_page_size(h)); | |
71 | vma = find_vma(mm, addr); | |
72 | if (TASK_SIZE - len >= addr && | |
73 | (!vma || addr + len <= vma->vm_start)) | |
74 | return addr; | |
75 | } | |
76 | /* | |
77 | * We are always doing an topdown search here. Slice code | |
78 | * does that too. | |
79 | */ | |
80 | info.flags = VM_UNMAPPED_AREA_TOPDOWN; | |
81 | info.length = len; | |
82 | info.low_limit = PAGE_SIZE; | |
83 | info.high_limit = current->mm->mmap_base; | |
84 | info.align_mask = PAGE_MASK & ~huge_page_mask(h); | |
85 | info.align_offset = 0; | |
86 | return vm_unmapped_area(&info); | |
87 | } |