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2ae4f1fd16
to select a serial console and debug port (resp). On ia64 these replace
the use of hints completely and take precedence over hints on alpha,
amd64 and i386. On sparc64 these variables are not yet recognised.
The reasons for introducing these variables are:
1. Hints have side-effects. They reserve the unit number for use by
isa or acpi devices and therefore cannot be used to select a pci
device. Also, the use of a unit number to select a device prior
to bus enumeration is nonsense. The new variables have no side-
effects and are not based on unit numbers.
2. Hints don't have the expression power to allow the sysadmin to
select UARTs that are not legacy PC devices and need the support
of compile-time constants to give the sysadmin some level of
flexibility.
The hw.uart.console and hw.uart.dbgport variables specify a list of
attributes. An attribute is a tag-value pair, seperated by a colon.
Attributes are seperated by a comma. Where possible, tags are the
same as those in /etc/remote (only br and pa in practice). Details
can be found in the manpage (not part of this commit).
Not tested on: amd64, pc98
121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/*
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* Copyright (c) 2003, 2004 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _DEV_UART_CPU_H_
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#define _DEV_UART_CPU_H_
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/*
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* Low-level operations for use by console and/or debug port support.
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*/
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struct uart_ops {
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int (*probe)(struct uart_bas *);
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void (*init)(struct uart_bas *, int, int, int, int);
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void (*term)(struct uart_bas *);
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void (*putc)(struct uart_bas *, int);
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int (*poll)(struct uart_bas *);
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int (*getc)(struct uart_bas *);
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};
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extern struct uart_ops uart_i8251_ops;
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extern struct uart_ops uart_ns8250_ops;
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extern struct uart_ops uart_sab82532_ops;
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extern struct uart_ops uart_z8530_ops;
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extern bus_space_tag_t uart_bus_space_io;
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extern bus_space_tag_t uart_bus_space_mem;
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/*
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* Console and debug port device info.
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*/
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struct uart_softc;
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struct uart_devinfo {
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SLIST_ENTRY(uart_devinfo) next;
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struct uart_ops ops;
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struct uart_bas bas;
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int baudrate;
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int databits;
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int stopbits;
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int parity;
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int type;
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#define UART_DEV_CONSOLE 0
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#define UART_DEV_DBGPORT 1
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#define UART_DEV_KEYBOARD 2
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int (*attach)(struct uart_softc*);
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int (*detach)(struct uart_softc*);
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void *cookie; /* Type dependent use. */
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};
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int uart_cpu_eqres(struct uart_bas *, struct uart_bas *);
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int uart_cpu_getdev(int, struct uart_devinfo *);
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int uart_getenv(int, struct uart_devinfo *);
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void uart_add_sysdev(struct uart_devinfo *);
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/*
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* Operations for low-level access to the UART. Primarily for use
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* by console and debug port logic.
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*/
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static __inline int
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uart_probe(struct uart_devinfo *di)
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{
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return (di->ops.probe(&di->bas));
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}
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static __inline void
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uart_init(struct uart_devinfo *di)
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{
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di->ops.init(&di->bas, di->baudrate, di->databits, di->stopbits,
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di->parity);
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}
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static __inline void
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uart_term(struct uart_devinfo *di)
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{
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di->ops.term(&di->bas);
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}
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static __inline void
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uart_putc(struct uart_devinfo *di, int c)
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{
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di->ops.putc(&di->bas, c);
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}
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static __inline int
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uart_poll(struct uart_devinfo *di)
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{
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return (di->ops.poll(&di->bas));
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}
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static __inline int
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uart_getc(struct uart_devinfo *di)
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{
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return (di->ops.getc(&di->bas));
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}
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#endif /* _DEV_UART_CPU_H_ */
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