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62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
#ifndef __IPC_H__
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#define __IPC_H__
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#define L4_NILTHREAD 0xFFFFFFFF
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#define L4_ANYTHREAD 0xFFFFFFFE
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#define L4_IPC_TAG_MR_OFFSET 0
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/* Pagefault */
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#define L4_IPC_TAG_PFAULT 0
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#define L4_IPC_FLAGS_TYPE_MASK 0x0000000F
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#define L4_IPC_FLAGS_SHORT 0x00000000 /* Short IPC involves just primary message registers */
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#define L4_IPC_FLAGS_FULL 0x00000001 /* Full IPC involves full UTCB copy */
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#define L4_IPC_FLAGS_EXTENDED 0x00000002 /* Extended IPC can page-fault and copy up to 2KB */
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/* Extended IPC extra fields */
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#define L4_IPC_FLAGS_MSG_INDEX_MASK 0x00000FF0 /* Index of message register with buffer pointer */
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#define L4_IPC_FLAGS_SIZE_MASK 0x0FFF0000
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#define L4_IPC_FLAGS_SIZE_SHIFT 16
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#define L4_IPC_FLAGS_MSG_INDEX_SHIFT 4
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#define L4_IPC_EXTENDED_MAX_SIZE (SZ_1K*2)
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#if defined (__KERNEL__)
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/* Kernel-only flags */
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#define IPC_FLAGS_SHORT L4_IPC_FLAGS_SHORT
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#define IPC_FLAGS_FULL L4_IPC_FLAGS_FULL
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#define IPC_FLAGS_EXTENDED L4_IPC_FLAGS_EXTENDED
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#define IPC_FLAGS_MSG_INDEX_MASK L4_IPC_FLAGS_MSG_INDEX_MASK
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#define IPC_FLAGS_TYPE_MASK L4_IPC_FLAGS_TYPE_MASK
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#define IPC_FLAGS_SIZE_MASK L4_IPC_FLAGS_SIZE_MASK
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#define IPC_FLAGS_SIZE_SHIFT L4_IPC_FLAGS_SIZE_SHIFT
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#define IPC_FLAGS_MSG_INDEX_SHIFT L4_IPC_FLAGS_MSG_INDEX_SHIFT
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#define IPC_FLAGS_ERROR_MASK 0xF0000000
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#define IPC_FLAGS_ERROR_SHIFT 28
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#define IPC_EFAULT (1 << 28)
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#define IPC_ENOIPC (1 << 29)
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#define IPC_EXTENDED_MAX_SIZE L4_IPC_EXTENDED_MAX_SIZE
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/*
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* ipc syscall uses an ipc_dir variable and send/recv
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* details are embedded in this variable.
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*/
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enum IPC_DIR {
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IPC_INVALID = 0,
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IPC_SEND = 1,
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IPC_RECV = 2,
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IPC_SENDRECV = 3,
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};
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/* These are for internally created ipc paths. */
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int ipc_send(l4id_t to, unsigned int flags);
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int ipc_sendrecv(l4id_t to, l4id_t from, unsigned int flags);
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#endif
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#endif /* __IPC_H__ */
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