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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
48483760 AK |
2 | #include <linux/mm.h> |
3 | #include <linux/hugetlb.h> | |
4 | #include <asm/pgtable.h> | |
5 | #include <asm/pgalloc.h> | |
6 | #include <asm/cacheflush.h> | |
7 | #include <asm/machdep.h> | |
8 | #include <asm/mman.h> | |
fbfa26d8 | 9 | #include <asm/tlb.h> |
48483760 AK |
10 | |
11 | void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) | |
12 | { | |
fbfa26d8 | 13 | int psize; |
48483760 AK |
14 | struct hstate *hstate = hstate_file(vma->vm_file); |
15 | ||
fbfa26d8 AK |
16 | psize = hstate_get_psize(hstate); |
17 | radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, psize); | |
48483760 AK |
18 | } |
19 | ||
20 | void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) | |
21 | { | |
fbfa26d8 | 22 | int psize; |
48483760 AK |
23 | struct hstate *hstate = hstate_file(vma->vm_file); |
24 | ||
fbfa26d8 AK |
25 | psize = hstate_get_psize(hstate); |
26 | radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, psize); | |
48483760 AK |
27 | } |
28 | ||
5491ae7b AK |
29 | void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long start, |
30 | unsigned long end) | |
31 | { | |
32 | int psize; | |
33 | struct hstate *hstate = hstate_file(vma->vm_file); | |
34 | ||
35 | psize = hstate_get_psize(hstate); | |
36 | radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize); | |
37 | } | |
38 | ||
48483760 AK |
39 | /* |
40 | * A vairant of hugetlb_get_unmapped_area doing topdown search | |
41 | * FIXME!! should we do as x86 does or non hugetlb area does ? | |
42 | * ie, use topdown or not based on mmap_is_legacy check ? | |
43 | */ | |
44 | unsigned long | |
45 | radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
46 | unsigned long len, unsigned long pgoff, | |
47 | unsigned long flags) | |
48 | { | |
49 | struct mm_struct *mm = current->mm; | |
50 | struct vm_area_struct *vma; | |
51 | struct hstate *h = hstate_file(file); | |
52 | struct vm_unmapped_area_info info; | |
53 | ||
f4ea6dcb AK |
54 | if (unlikely(addr > mm->context.addr_limit && addr < TASK_SIZE)) |
55 | mm->context.addr_limit = TASK_SIZE; | |
56 | ||
48483760 AK |
57 | if (len & ~huge_page_mask(h)) |
58 | return -EINVAL; | |
be77e999 | 59 | if (len > mm->task_size) |
48483760 AK |
60 | return -ENOMEM; |
61 | ||
62 | if (flags & MAP_FIXED) { | |
63 | if (prepare_hugepage_range(file, addr, len)) | |
64 | return -EINVAL; | |
65 | return addr; | |
66 | } | |
67 | ||
68 | if (addr) { | |
69 | addr = ALIGN(addr, huge_page_size(h)); | |
70 | vma = find_vma(mm, addr); | |
be77e999 | 71 | if (mm->task_size - len >= addr && |
1be7107f | 72 | (!vma || addr + len <= vm_start_gap(vma))) |
48483760 AK |
73 | return addr; |
74 | } | |
75 | /* | |
76 | * We are always doing an topdown search here. Slice code | |
77 | * does that too. | |
78 | */ | |
79 | info.flags = VM_UNMAPPED_AREA_TOPDOWN; | |
80 | info.length = len; | |
81 | info.low_limit = PAGE_SIZE; | |
82 | info.high_limit = current->mm->mmap_base; | |
83 | info.align_mask = PAGE_MASK & ~huge_page_mask(h); | |
84 | info.align_offset = 0; | |
f4ea6dcb AK |
85 | |
86 | if (addr > DEFAULT_MAP_WINDOW) | |
87 | info.high_limit += mm->context.addr_limit - DEFAULT_MAP_WINDOW; | |
88 | ||
48483760 AK |
89 | return vm_unmapped_area(&info); |
90 | } |