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Commit | Line | Data |
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45516216 | 1 | extern struct page *mem_map; |
2 | struct page { | |
3 | unsigned long flags; | |
4 | }; | |
5 | struct scatterlist { | |
6 | struct page *page; | |
7 | unsigned int offset; | |
8 | }; | |
9 | struct request { | |
10 | unsigned int cmd_flags; | |
11 | }; | |
12 | inline __attribute__ ((always_inline)) | |
13 | void sg_set_buf(struct scatterlist *sg, const void *buf, unsigned int buflen) | |
14 | { | |
15 | sg->page = | |
16 | (mem_map + | |
17 | ((((unsigned long)(buf) - 0x80000000) >> 12) - | |
18 | ((0x0C000000 >> 12)))); | |
19 | sg->offset = ((unsigned long)(buf) & ~(~((1UL << 12) - 1))); | |
20 | } | |
21 | ||
22 | inline __attribute__ ((always_inline)) | |
23 | void sg_init_one(struct scatterlist *sg, const void *buf, unsigned int buflen) | |
24 | { | |
25 | memset(sg, 0, sizeof(*sg)); | |
26 | sg_set_buf(sg, buf, buflen); | |
27 | }; | |
28 | struct mmc_card { | |
29 | unsigned int state; | |
30 | }; | |
31 | struct mmc_queue { | |
32 | struct mmc_card *card; | |
33 | void *data; | |
34 | }; | |
35 | struct mmc_blk_data { | |
36 | struct mmc_queue queue; | |
37 | }; | |
38 | static unsigned int mmc_sd_num_wr_blocks(struct mmc_card *card) | |
39 | { | |
40 | unsigned int blocks; | |
41 | struct scatterlist sg; | |
42 | sg_init_one(&sg, &blocks, 4); | |
43 | } | |
44 | int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) | |
45 | { | |
46 | struct mmc_blk_data *md = mq->data; | |
47 | struct mmc_card *card = md->queue.card; | |
48 | if (((req)->cmd_flags & 1) != 0 && ((card)->state & (1 << 3))) { | |
49 | unsigned int blocks; | |
50 | blocks = mmc_sd_num_wr_blocks(card); | |
51 | if (blocks != (unsigned int)-1) { | |
52 | do { | |
53 | local_irq_disable(); | |
54 | } | |
55 | while (0); | |
56 | } | |
57 | } | |
58 | } |