Subversion Repositories c0or1k

#ifndef __IPC_H__

#define __IPC_H__

#define L4_NILTHREAD            0xFFFFFFFF

#define L4_ANYTHREAD            0xFFFFFFFE

#define L4_IPC_TAG_MR_OFFSET            0

/* Pagefault */

#define L4_IPC_TAG_PFAULT               0

#define L4_IPC_TAG_UNDEF_FAULT          1

#define L4_IPC_FLAGS_TYPE_MASK          0x0000000F

#define L4_IPC_FLAGS_SHORT              0x00000000      /* Short IPC involves just primary message registers */

#define L4_IPC_FLAGS_FULL               0x00000001      /* Full IPC involves full UTCB copy */

#define L4_IPC_FLAGS_EXTENDED           0x00000002      /* Extended IPC can page-fault and copy up to 2KB */

/* Extended IPC extra fields */

#define L4_IPC_FLAGS_MSG_INDEX_MASK     0x00000FF0      /* Index of message register with buffer pointer */

#define L4_IPC_FLAGS_SIZE_MASK          0x0FFF0000

#define L4_IPC_FLAGS_SIZE_SHIFT         16

#define L4_IPC_FLAGS_MSG_INDEX_SHIFT    4

#define L4_IPC_EXTENDED_MAX_SIZE        (SZ_1K*2)

#if defined (__KERNEL__)

/* Kernel-only flags */

#define IPC_FLAGS_SHORT                 L4_IPC_FLAGS_SHORT

#define IPC_FLAGS_FULL                  L4_IPC_FLAGS_FULL

#define IPC_FLAGS_EXTENDED              L4_IPC_FLAGS_EXTENDED

#define IPC_FLAGS_MSG_INDEX_MASK        L4_IPC_FLAGS_MSG_INDEX_MASK

#define IPC_FLAGS_TYPE_MASK             L4_IPC_FLAGS_TYPE_MASK

#define IPC_FLAGS_SIZE_MASK             L4_IPC_FLAGS_SIZE_MASK

#define IPC_FLAGS_SIZE_SHIFT            L4_IPC_FLAGS_SIZE_SHIFT

#define IPC_FLAGS_MSG_INDEX_SHIFT       L4_IPC_FLAGS_MSG_INDEX_SHIFT

#define IPC_FLAGS_ERROR_MASK            0xF0000000

#define IPC_FLAGS_ERROR_SHIFT           28

#define IPC_EFAULT                      (1 << 28)

#define IPC_ENOIPC                      (1 << 29)

#define IPC_EXTENDED_MAX_SIZE           L4_IPC_EXTENDED_MAX_SIZE

/*

 * ipc syscall uses an ipc_dir variable and send/recv

 * details are embedded in this variable.

 */

enum IPC_DIR {

        IPC_INVALID = 0,

        IPC_SEND = 1,

        IPC_RECV = 2,

        IPC_SENDRECV = 3,

};

/* These are for internally created ipc paths. */

int ipc_send(l4id_t to, unsigned int flags);

int ipc_sendrecv(l4id_t to, l4id_t from, unsigned int flags);

#endif

#endif /* __IPC_H__ */