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Lines 54-64
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#ifndef USE_XREAD |
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#ifndef USE_XREAD |
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static struct edd_packet packet; |
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static struct edd_packet packet; |
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static char bounce_buffer[512]; |
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static int drvread_one(struct dsk *, void *, daddr_t, unsigned); |
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#endif |
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#endif |
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int |
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int |
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drvread(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk) |
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drvread(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk) |
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{ |
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{ |
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#ifndef USE_XREAD |
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int i; |
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/* If the buffer is below 1MB, pass it through directly. */ |
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if (VTOP((char *)buf + nblk * 512) >> 20 == 0) |
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return (drvread_one(dskp, buf, lba, nblk)); |
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/* |
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* Use the bounce buffer to transfer the data one sector at a |
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* time. |
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*/ |
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for (i = 0; i < nblk; i++) { |
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if (drvread_one(dskp, bounce_buffer, lba + i, 1) < 0) |
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return (-1); |
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memcpy((char *)buf + 512 * i, bounce_buffer, 512); |
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} |
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return (0); |
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} |
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static int |
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drvread_one(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk) |
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{ |
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#endif |
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static unsigned c = 0x2d5c7c2f; |
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static unsigned c = 0x2d5c7c2f; |
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int retries = 3; |
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int retries = 3; |
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