152840/ice.i.3

   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 }