PRCM: 34XX: Fix wrong shift value used in dpll4_m4x2_ck enable bit
[linux-ginger.git] / arch / x86 / xen / grant-table.c
blob49ba9b5224d1a71da3b5d3dc139ca726f41bcd5e
1 /******************************************************************************
2 * grant_table.c
3 * x86 specific part
5 * Granting foreign access to our memory reservation.
7 * Copyright (c) 2005-2006, Christopher Clark
8 * Copyright (c) 2004-2005, K A Fraser
9 * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
10 * VA Linux Systems Japan. Split out x86 specific part.
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License version 2
14 * as published by the Free Software Foundation; or, when distributed
15 * separately from the Linux kernel or incorporated into other
16 * software packages, subject to the following license:
18 * Permission is hereby granted, free of charge, to any person obtaining a copy
19 * of this source file (the "Software"), to deal in the Software without
20 * restriction, including without limitation the rights to use, copy, modify,
21 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
22 * and to permit persons to whom the Software is furnished to do so, subject to
23 * the following conditions:
25 * The above copyright notice and this permission notice shall be included in
26 * all copies or substantial portions of the Software.
28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
29 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
30 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
31 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
32 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
33 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
34 * IN THE SOFTWARE.
37 #include <linux/sched.h>
38 #include <linux/mm.h>
39 #include <linux/vmalloc.h>
41 #include <xen/interface/xen.h>
42 #include <xen/page.h>
43 #include <xen/grant_table.h>
45 #include <asm/pgtable.h>
47 static int map_pte_fn(pte_t *pte, struct page *pmd_page,
48 unsigned long addr, void *data)
50 unsigned long **frames = (unsigned long **)data;
52 set_pte_at(&init_mm, addr, pte, mfn_pte((*frames)[0], PAGE_KERNEL));
53 (*frames)++;
54 return 0;
57 static int unmap_pte_fn(pte_t *pte, struct page *pmd_page,
58 unsigned long addr, void *data)
61 set_pte_at(&init_mm, addr, pte, __pte(0));
62 return 0;
65 int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
66 unsigned long max_nr_gframes,
67 struct grant_entry **__shared)
69 int rc;
70 struct grant_entry *shared = *__shared;
72 if (shared == NULL) {
73 struct vm_struct *area =
74 xen_alloc_vm_area(PAGE_SIZE * max_nr_gframes);
75 BUG_ON(area == NULL);
76 shared = area->addr;
77 *__shared = shared;
80 rc = apply_to_page_range(&init_mm, (unsigned long)shared,
81 PAGE_SIZE * nr_gframes,
82 map_pte_fn, &frames);
83 return rc;
86 void arch_gnttab_unmap_shared(struct grant_entry *shared,
87 unsigned long nr_gframes)
89 apply_to_page_range(&init_mm, (unsigned long)shared,
90 PAGE_SIZE * nr_gframes, unmap_pte_fn, NULL);