15 // incoming mailbox 0-3  register offsets
16 extern inline int INCOMING_MAILBOX_REG(unsigned int mailbox)  in INCOMING_MAILBOX_REG()  argument
18 	return (0x10 + 4 * mailbox);  in INCOMING_MAILBOX_REG()
31 // select byte 0 to 3 of incoming mailbox
37 // select incoming mailbox 0 to 3
38 extern inline int INBOX_SELECT_BITS(unsigned int mailbox)  in INBOX_SELECT_BITS()  argument
40 	return (mailbox & 0x3) << 10;  in INBOX_SELECT_BITS()
43 // select byte 0 to 3 of outgoing mailbox
49 // select outgoing mailbox 0 to 3
50 extern inline int OUTBOX_SELECT_BITS(unsigned int mailbox)  in OUTBOX_SELECT_BITS()  argument
52 	return (mailbox & 0x3) << 2;  in OUTBOX_SELECT_BITS()
57 	MBOX_FLAGS_RESET_BIT = 0x08000000,	// resets mailbox empty/full flags