5 * Purpose: Provide a simple buffer management driver
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11 /********************************************************************/
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17 * Buffer sizes in bytes
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20 #define RX_BUF_SZ 1520 //2048
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23 #define TX_BUF_SZ 1520
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27 * Buffer Descriptor Format
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29 #pragma options align= packed
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32 unsigned short status; /* control and status */
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33 unsigned short length; /* transfer length */
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34 unsigned char *data; /* buffer address */
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38 * Bit level definitions for status field of buffer descriptors
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40 #define TX_BD_R 0x8000
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41 #define TX_BD_TO1 0x4000
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42 #define TX_BD_W 0x2000
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43 #define TX_BD_TO2 0x1000
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44 #define TX_BD_INTERRUPT 0x1000 /* MCF547x/8x Only */
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45 #define TX_BD_L 0x0800
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46 #define TX_BD_TC 0x0400
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47 #define TX_BD_DEF 0x0200 /* MCF5272 Only */
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48 #define TX_BD_ABC 0x0200
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49 #define TX_BD_HB 0x0100 /* MCF5272 Only */
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50 #define TX_BD_LC 0x0080 /* MCF5272 Only */
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51 #define TX_BD_RL 0x0040 /* MCF5272 Only */
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52 #define TX_BD_UN 0x0002 /* MCF5272 Only */
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53 #define TX_BD_CSL 0x0001 /* MCF5272 Only */
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55 #define RX_BD_E 0x8000
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56 #define RX_BD_R01 0x4000
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57 #define RX_BD_W 0x2000
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58 #define RX_BD_R02 0x1000
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59 #define RX_BD_INTERRUPT 0x1000 /* MCF547x/8x Only */
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60 #define RX_BD_L 0x0800
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61 #define RX_BD_M 0x0100
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62 #define RX_BD_BC 0x0080
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63 #define RX_BD_MC 0x0040
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64 #define RX_BD_LG 0x0020
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65 #define RX_BD_NO 0x0010
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66 #define RX_BD_CR 0x0004
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67 #define RX_BD_OV 0x0002
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68 #define RX_BD_TR 0x0001
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69 #define RX_BD_ERROR (RX_BD_NO | RX_BD_CR | RX_BD_OV | RX_BD_TR)
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72 * The following defines are provided by the MCF547x/8x
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73 * DMA API. These are shown here to show their correlation
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74 * to the other FEC buffer descriptor status bits
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76 * #define MCD_FEC_BUF_READY 0x8000
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77 * #define MCD_FEC_WRAP 0x2000
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78 * #define MCD_FEC_INTERRUPT 0x1000
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79 * #define MCD_FEC_END_FRAME 0x0800
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83 * Functions provided in fec_bd.c
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85 int fecbd_init(int, int, int);
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86 void fecbd_flush(int);
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87 void fecbd_dump( void );
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88 unsigned long fecbd_get_start(int, int);
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89 FECBD* fecbd_rx_alloc(int);
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90 FECBD* fecbd_tx_alloc(int);
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91 FECBD* fecbd_tx_free(int);
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96 #define ERR_MALLOC (-1)
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97 #define ERR_NBUFALLOC (-2)
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99 /*******************************************************************/
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101 #endif /* _FECBD_H_ */
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