kdebugfs.c (5b45fe6b39e1d01c45de7b8e6d3ff72585eee6cf) kdebugfs.c (f7750a79568788473c5e8092ee58a52248f34329)
1/*
2 * Architecture specific debugfs files
3 *
4 * Copyright (C) 2007, Intel Corp.
5 * Huang Ying <ying.huang@intel.com>
6 *
7 * This file is released under the GPLv2.
8 */

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28};
29
30static ssize_t setup_data_read(struct file *file, char __user *user_buf,
31 size_t count, loff_t *ppos)
32{
33 struct setup_data_node *node = file->private_data;
34 unsigned long remain;
35 loff_t pos = *ppos;
1/*
2 * Architecture specific debugfs files
3 *
4 * Copyright (C) 2007, Intel Corp.
5 * Huang Ying <ying.huang@intel.com>
6 *
7 * This file is released under the GPLv2.
8 */

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28};
29
30static ssize_t setup_data_read(struct file *file, char __user *user_buf,
31 size_t count, loff_t *ppos)
32{
33 struct setup_data_node *node = file->private_data;
34 unsigned long remain;
35 loff_t pos = *ppos;
36 struct page *pg;
37 void *p;
38 u64 pa;
39
40 if (pos < 0)
41 return -EINVAL;
42
43 if (pos >= node->len)
44 return 0;
45
46 if (count > node->len - pos)
47 count = node->len - pos;
48
49 pa = node->paddr + sizeof(struct setup_data) + pos;
36 void *p;
37 u64 pa;
38
39 if (pos < 0)
40 return -EINVAL;
41
42 if (pos >= node->len)
43 return 0;
44
45 if (count > node->len - pos)
46 count = node->len - pos;
47
48 pa = node->paddr + sizeof(struct setup_data) + pos;
50 pg = pfn_to_page((pa + count - 1) >> PAGE_SHIFT);
51 if (PageHighMem(pg)) {
52 p = ioremap_cache(pa, count);
53 if (!p)
54 return -ENXIO;
55 } else
56 p = __va(pa);
49 p = memremap(pa, count, MEMREMAP_WB);
50 if (!p)
51 return -ENOMEM;
57
58 remain = copy_to_user(user_buf, p, count);
59
52
53 remain = copy_to_user(user_buf, p, count);
54
60 if (PageHighMem(pg))
61 iounmap(p);
55 memunmap(p);
62
63 if (remain)
64 return -EFAULT;
65
66 *ppos = pos + count;
67
68 return count;
69}

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104}
105
106static int __init create_setup_data_nodes(struct dentry *parent)
107{
108 struct setup_data_node *node;
109 struct setup_data *data;
110 int error;
111 struct dentry *d;
56
57 if (remain)
58 return -EFAULT;
59
60 *ppos = pos + count;
61
62 return count;
63}

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98}
99
100static int __init create_setup_data_nodes(struct dentry *parent)
101{
102 struct setup_data_node *node;
103 struct setup_data *data;
104 int error;
105 struct dentry *d;
112 struct page *pg;
113 u64 pa_data;
114 int no = 0;
115
116 d = debugfs_create_dir("setup_data", parent);
117 if (!d)
118 return -ENOMEM;
119
120 pa_data = boot_params.hdr.setup_data;
121
122 while (pa_data) {
123 node = kmalloc(sizeof(*node), GFP_KERNEL);
124 if (!node) {
125 error = -ENOMEM;
126 goto err_dir;
127 }
128
106 u64 pa_data;
107 int no = 0;
108
109 d = debugfs_create_dir("setup_data", parent);
110 if (!d)
111 return -ENOMEM;
112
113 pa_data = boot_params.hdr.setup_data;
114
115 while (pa_data) {
116 node = kmalloc(sizeof(*node), GFP_KERNEL);
117 if (!node) {
118 error = -ENOMEM;
119 goto err_dir;
120 }
121
129 pg = pfn_to_page((pa_data+sizeof(*data)-1) >> PAGE_SHIFT);
130 if (PageHighMem(pg)) {
131 data = ioremap_cache(pa_data, sizeof(*data));
132 if (!data) {
133 kfree(node);
134 error = -ENXIO;
135 goto err_dir;
136 }
137 } else
138 data = __va(pa_data);
122 data = memremap(pa_data, sizeof(*data), MEMREMAP_WB);
123 if (!data) {
124 kfree(node);
125 error = -ENOMEM;
126 goto err_dir;
127 }
139
140 node->paddr = pa_data;
141 node->type = data->type;
142 node->len = data->len;
143 error = create_setup_data_node(d, no, node);
144 pa_data = data->next;
145
128
129 node->paddr = pa_data;
130 node->type = data->type;
131 node->len = data->len;
132 error = create_setup_data_node(d, no, node);
133 pa_data = data->next;
134
146 if (PageHighMem(pg))
147 iounmap(data);
135 memunmap(data);
148 if (error)
149 goto err_dir;
150 no++;
151 }
152
153 return 0;
154
155err_dir:

--- 59 unchanged lines hidden --- 		136 if (error)
137 goto err_dir;
138 no++;
139 }
140
141 return 0;
142
143err_dir:

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