1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright (c) 1998-1999 by Sun Microsystems, Inc. 24*0Sstevel@tonic-gate * All rights reserved. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ifndef _SYS_POLLED_IO_H 28*0Sstevel@tonic-gate #define _SYS_POLLED_IO_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #ifdef __cplusplus 33*0Sstevel@tonic-gate extern "C" { 34*0Sstevel@tonic-gate #endif 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate typedef struct polled_device { 37*0Sstevel@tonic-gate /* 38*0Sstevel@tonic-gate * This lock is only used to lock writing from 39*0Sstevel@tonic-gate * the fields on the structure. The values in the 40*0Sstevel@tonic-gate * structure can be read under obp, so the lock 41*0Sstevel@tonic-gate * isn't valid then. 42*0Sstevel@tonic-gate */ 43*0Sstevel@tonic-gate kmutex_t polled_device_lock; 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate /* 46*0Sstevel@tonic-gate * When we switch over the console, this is the old value 47*0Sstevel@tonic-gate * so that we can restore it later. 48*0Sstevel@tonic-gate */ 49*0Sstevel@tonic-gate uint64_t polled_old_handle; 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate /* 52*0Sstevel@tonic-gate * Pointer to registerd polled I/O callbacks. 53*0Sstevel@tonic-gate */ 54*0Sstevel@tonic-gate cons_polledio_t *polled_io; 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate } polled_device_t; 57*0Sstevel@tonic-gate 58*0Sstevel@tonic-gate _NOTE(MUTEX_PROTECTS_DATA(polled_device_t::polled_device_lock, 59*0Sstevel@tonic-gate polled_device_t)) 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate /* 62*0Sstevel@tonic-gate * The lower layers did not find any characters. 63*0Sstevel@tonic-gate */ 64*0Sstevel@tonic-gate #define CIF_NO_CHARACTERS ((uint_t)-2) 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate /* 67*0Sstevel@tonic-gate * Every CIF has at least 3 arguments: 0 (name), 1 (in args), and 2 (out args). 68*0Sstevel@tonic-gate */ 69*0Sstevel@tonic-gate #define CIF_MIN_SIZE 3 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate #define CIF_NAME 0 /* name of function */ 72*0Sstevel@tonic-gate #define CIF_NUMBER_IN_ARGS 1 /* number of arguments passed in */ 73*0Sstevel@tonic-gate #define CIF_NUMBER_OUT_ARGS 2 /* number of arguments for return */ 74*0Sstevel@tonic-gate #define CIF_BUFFER_ADDRESS 3 /* address to write data */ 75*0Sstevel@tonic-gate #define CIF_BUFFER_LENGTH 4 /* length of BUFFER_ADDRESS */ 76*0Sstevel@tonic-gate #define CIF_RETURN_VALUE 5 /* return status of operation */ 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate /* 80*0Sstevel@tonic-gate * This is the size of the structure that we are expecting to be passed 81*0Sstevel@tonic-gate * in. This is based on CIF_MIN_SIZE + address + length + value (see above) 82*0Sstevel@tonic-gate */ 83*0Sstevel@tonic-gate #define CIF_SIZE 6 /* size of cif structure */ 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate /* 86*0Sstevel@tonic-gate * These are the types of polled I/O that this module handles. 87*0Sstevel@tonic-gate */ 88*0Sstevel@tonic-gate typedef enum polled_io_console_type { 89*0Sstevel@tonic-gate POLLED_IO_CONSOLE_INPUT = 0, 90*0Sstevel@tonic-gate POLLED_IO_CONSOLE_OUTPUT = 1 91*0Sstevel@tonic-gate } polled_io_console_type_t; 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate /* 94*0Sstevel@tonic-gate * Initialize the polled I/O kernel structures 95*0Sstevel@tonic-gate */ 96*0Sstevel@tonic-gate void polled_io_init(void); 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate /* 99*0Sstevel@tonic-gate * De-initialize the polled I/O kernel structures 100*0Sstevel@tonic-gate */ 101*0Sstevel@tonic-gate void polled_io_fini(void); 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate /* 104*0Sstevel@tonic-gate * Register a device to be used as a console for OBP. 105*0Sstevel@tonic-gate */ 106*0Sstevel@tonic-gate int polled_io_register_callbacks(cons_polledio_t *, int); 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gate /* 109*0Sstevel@tonic-gate * Unregister a device to be used as a console for OBP. 110*0Sstevel@tonic-gate */ 111*0Sstevel@tonic-gate int polled_io_unregister_callbacks(cons_polledio_t *, int); 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate #ifdef __cplusplus 114*0Sstevel@tonic-gate } 115*0Sstevel@tonic-gate #endif 116*0Sstevel@tonic-gate 117*0Sstevel@tonic-gate #endif /* _SYS_POLLED_IO_H */ 118