| 1 | /*
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| 2 | * Constants etc. for the Bochs/Etherboot pseudo-NIC
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| 3 | *
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| 4 | * This header file must be valid C and C++.
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| 5 | *
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| 6 | * Operation of the pseudo-NIC (PNIC) is pretty simple. To write a
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| 7 | * command plus data, first write the length of the data to
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| 8 | * PNIC_REG_LEN, then write the data a byte at a type to
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| 9 | * PNIC_REG_DATA, then write the command code to PNIC_REG_CMD. The
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| 10 | * status will be available from PNIC_REG_STAT. The length of any
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| 11 | * data returned will be in PNIC_REG_LEN and can be read a byte at a
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| 12 | * time from PNIC_REG_DATA.
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| 13 | */
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| 14 |
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| 15 | /*
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| 16 | * PCI parameters
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| 17 | */
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| 18 | #define PNIC_PCI_VENDOR 0xfefe /* Hopefully these won't clash with */
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| 19 | #define PNIC_PCI_DEVICE 0xefef /* any real PCI device IDs. */
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| 20 |
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| 21 | /*
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| 22 | * 'Hardware' register addresses, offset from io_base
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| 23 | */
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| 24 | #define PNIC_REG_CMD 0x00 /* Command register, 2 bytes, write only */
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| 25 | #define PNIC_REG_STAT 0x00 /* Status register, 2 bytes, read only */
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| 26 | #define PNIC_REG_LEN 0x02 /* Length register, 2 bytes, read-write */
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| 27 | #define PNIC_REG_DATA 0x04 /* Data port, 1 byte, read-write */
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| 28 | /*
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| 29 | * PNIC_MAX_REG used in Bochs to claim i/o space
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| 30 | */
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| 31 | #define PNIC_MAX_REG 0x04
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| 32 |
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| 33 | /*
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| 34 | * Command code definitions: write these into PNIC_REG_CMD
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| 35 | */
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| 36 | #define PNIC_CMD_NOOP 0x0000
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| 37 | #define PNIC_CMD_API_VER 0x0001
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| 38 | #define PNIC_CMD_READ_MAC 0x0002
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| 39 | #define PNIC_CMD_RESET 0x0003
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| 40 | #define PNIC_CMD_XMIT 0x0004
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| 41 | #define PNIC_CMD_RECV 0x0005
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| 42 | #define PNIC_CMD_RECV_QLEN 0x0006
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| 43 | #define PNIC_CMD_MASK_IRQ 0x0007
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| 44 | #define PNIC_CMD_FORCE_IRQ 0x0008
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| 45 |
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| 46 | /*
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| 47 | * Status code definitions: read these from PNIC_REG_STAT
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| 48 | *
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| 49 | * We avoid using status codes that might be confused with
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| 50 | * randomly-read data (e.g. 0x0000, 0xffff etc.)
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| 51 | */
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| 52 | #define PNIC_STATUS_OK 0x4f4b /* 'OK' */
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| 53 | #define PNIC_STATUS_UNKNOWN_CMD 0x3f3f /* '??' */
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| 54 |
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| 55 | /*
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| 56 | * Other miscellaneous information
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| 57 | */
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| 58 |
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| 59 | #define PNIC_API_VERSION 0x0101 /* 1.1 */
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