sitsang_eth_info.h

Intel XScale PXA255 引导Linux的Redboot 版bootloader源代码！

#include "lan91c96.h"


// ------------------------------------------------------------------------
//
//                      DEVICES AND PACKET QUEUES
//
// ------------------------------------------------------------------------
// The system seems to work OK with as few as 8 of RX and TX descriptors.
// It limps very painfully with only 4.
// Performance is better with more than 8.
// But the size of non-cached (so useless for anything else)
// memory window is 1Mb, so we might as well use it all.
//
// 128 for these uses the whole 1Mb, near enough.

#ifndef MAX_RX_DESCRIPTORS
#ifdef CYGPKG_REDBOOT
#define MAX_RX_DESCRIPTORS	4       // number of Rx descriptors
#else
#define MAX_RX_DESCRIPTORS	128     // number of Rx descriptors
#endif
#endif
#ifndef MAX_TX_DESCRIPTORS
#ifdef CYGPKG_REDBOOT
#define MAX_TX_DESCRIPTORS	4       // number of Tx descriptors
#else
#define MAX_TX_DESCRIPTORS	128     // number of Tx descriptors
#endif
#endif



typedef struct LAN91c96T {
    cyg_uint8                           // (split up for atomic byte access)
        found:1,                        // was hardware discovered?
        mac_addr_ok:1,                  // can we bring up?
        active:1,                       // has this if been brung up?
        spare1:5; 
    cyg_uint8
        spare2:8; 
    cyg_uint8
        tx_in_progress:1,               // transmit in progress flag
        tx_queue_full:1,                // all Tx descriptors used flag
        spare3:6; 
    cyg_uint8  index;                   // 0 or 1 or whatever
    cyg_uint32 devid;                   // PCI device id
    cyg_uint32 memory_address;          // PCI memory address
    cyg_uint32 io_address;              // memory mapped I/O address
    cyg_uint8  mac_address[6];          // mac (hardware) address
    void *ndp;                          // Network Device Pointer

    int next_rx_descriptor;             // descriptor index for RFDs
    struct rfd *rx_ring[MAX_RX_DESCRIPTORS]; // location of Rx descriptors

    int tx_descriptor_add;              // descriptor index for additions
    int tx_descriptor_active;           // descriptor index for active tx
    int tx_descriptor_remove;           // descriptor index for remove

    struct txcb *tx_ring[MAX_TX_DESCRIPTORS];  // location of Tx descriptors
    unsigned long tx_keys[MAX_TX_DESCRIPTORS];
                                        // keys for tx q management

    // Interrupt handling stuff
    cyg_vector_t    vector;             // interrupt vector
    cyg_handle_t    interrupt_handle;   // handle for int.handler
    cyg_interrupt   interrupt_object;

#ifdef KEEP_STATISTICS
    void *p_statistics;                 // pointer to statistical counters
#endif

} LAN91c96;