diff options
Diffstat (limited to 'arch/ia64/xen/xencomm.c')
-rw-r--r-- | arch/ia64/xen/xencomm.c | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/arch/ia64/xen/xencomm.c b/arch/ia64/xen/xencomm.c deleted file mode 100644 index 73d903ca2d64..000000000000 --- a/arch/ia64/xen/xencomm.c +++ /dev/null | |||
@@ -1,106 +0,0 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2006 Hollis Blanchard <hollisb@us.ibm.com>, IBM Corporation | ||
3 | * | ||
4 | * This program is free software; you can redistribute it and/or modify | ||
5 | * it under the terms of the GNU General Public License as published by | ||
6 | * the Free Software Foundation; either version 2 of the License, or | ||
7 | * (at your option) any later version. | ||
8 | * | ||
9 | * This program is distributed in the hope that it will be useful, | ||
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | * GNU General Public License for more details. | ||
13 | * | ||
14 | * You should have received a copy of the GNU General Public License | ||
15 | * along with this program; if not, write to the Free Software | ||
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
17 | */ | ||
18 | |||
19 | #include <linux/mm.h> | ||
20 | #include <linux/err.h> | ||
21 | |||
22 | static unsigned long kernel_virtual_offset; | ||
23 | static int is_xencomm_initialized; | ||
24 | |||
25 | /* for xen early printk. It uses console io hypercall which uses xencomm. | ||
26 | * However early printk may use it before xencomm initialization. | ||
27 | */ | ||
28 | int | ||
29 | xencomm_is_initialized(void) | ||
30 | { | ||
31 | return is_xencomm_initialized; | ||
32 | } | ||
33 | |||
34 | void | ||
35 | xencomm_initialize(void) | ||
36 | { | ||
37 | kernel_virtual_offset = KERNEL_START - ia64_tpa(KERNEL_START); | ||
38 | is_xencomm_initialized = 1; | ||
39 | } | ||
40 | |||
41 | /* Translate virtual address to physical address. */ | ||
42 | unsigned long | ||
43 | xencomm_vtop(unsigned long vaddr) | ||
44 | { | ||
45 | struct page *page; | ||
46 | struct vm_area_struct *vma; | ||
47 | |||
48 | if (vaddr == 0) | ||
49 | return 0UL; | ||
50 | |||
51 | if (REGION_NUMBER(vaddr) == 5) { | ||
52 | pgd_t *pgd; | ||
53 | pud_t *pud; | ||
54 | pmd_t *pmd; | ||
55 | pte_t *ptep; | ||
56 | |||
57 | /* On ia64, TASK_SIZE refers to current. It is not initialized | ||
58 | during boot. | ||
59 | Furthermore the kernel is relocatable and __pa() doesn't | ||
60 | work on addresses. */ | ||
61 | if (vaddr >= KERNEL_START | ||
62 | && vaddr < (KERNEL_START + KERNEL_TR_PAGE_SIZE)) | ||
63 | return vaddr - kernel_virtual_offset; | ||
64 | |||
65 | /* In kernel area -- virtually mapped. */ | ||
66 | pgd = pgd_offset_k(vaddr); | ||
67 | if (pgd_none(*pgd) || pgd_bad(*pgd)) | ||
68 | return ~0UL; | ||
69 | |||
70 | pud = pud_offset(pgd, vaddr); | ||
71 | if (pud_none(*pud) || pud_bad(*pud)) | ||
72 | return ~0UL; | ||
73 | |||
74 | pmd = pmd_offset(pud, vaddr); | ||
75 | if (pmd_none(*pmd) || pmd_bad(*pmd)) | ||
76 | return ~0UL; | ||
77 | |||
78 | ptep = pte_offset_kernel(pmd, vaddr); | ||
79 | if (!ptep) | ||
80 | return ~0UL; | ||
81 | |||
82 | return (pte_val(*ptep) & _PFN_MASK) | (vaddr & ~PAGE_MASK); | ||
83 | } | ||
84 | |||
85 | if (vaddr > TASK_SIZE) { | ||
86 | /* percpu variables */ | ||
87 | if (REGION_NUMBER(vaddr) == 7 && | ||
88 | REGION_OFFSET(vaddr) >= (1ULL << IA64_MAX_PHYS_BITS)) | ||
89 | ia64_tpa(vaddr); | ||
90 | |||
91 | /* kernel address */ | ||
92 | return __pa(vaddr); | ||
93 | } | ||
94 | |||
95 | /* XXX double-check (lack of) locking */ | ||
96 | vma = find_extend_vma(current->mm, vaddr); | ||
97 | if (!vma) | ||
98 | return ~0UL; | ||
99 | |||
100 | /* We assume the page is modified. */ | ||
101 | page = follow_page(vma, vaddr, FOLL_WRITE | FOLL_TOUCH); | ||
102 | if (IS_ERR_OR_NULL(page)) | ||
103 | return ~0UL; | ||
104 | |||
105 | return (page_to_pfn(page) << PAGE_SHIFT) | (vaddr & ~PAGE_MASK); | ||
106 | } | ||