mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-15 08:44:14 +08:00
4e9e95a355
So the iSeries console will be faster since it can send up to 200 bytes at a time to the Hypervisor. This only affects the tty part of the console, the console writes are still in 16 byte lots. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/*
|
|
* hvc_console.h
|
|
* Copyright (C) 2005 IBM Corporation
|
|
*
|
|
* Author(s):
|
|
* Ryan S. Arnold <rsa@us.ibm.com>
|
|
*
|
|
* hvc_console header information:
|
|
* moved here from include/asm-powerpc/hvconsole.h
|
|
* and drivers/char/hvc_console.c
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef HVC_CONSOLE_H
|
|
#define HVC_CONSOLE_H
|
|
|
|
/*
|
|
* This is the max number of console adapters that can/will be found as
|
|
* console devices on first stage console init. Any number beyond this range
|
|
* can't be used as a console device but is still a valid tty device.
|
|
*/
|
|
#define MAX_NR_HVC_CONSOLES 16
|
|
|
|
/*
|
|
* The Linux TTY code does not support dynamic addition of tty derived devices
|
|
* so we need to know how many tty devices we might need when space is allocated
|
|
* for the tty device. Since this driver supports hotplug of vty adapters we
|
|
* need to make sure we have enough allocated.
|
|
*/
|
|
#define HVC_ALLOC_TTY_ADAPTERS 8
|
|
|
|
|
|
/* implemented by a low level driver */
|
|
struct hv_ops {
|
|
int (*get_chars)(uint32_t vtermno, char *buf, int count);
|
|
int (*put_chars)(uint32_t vtermno, const char *buf, int count);
|
|
};
|
|
|
|
struct hvc_struct;
|
|
|
|
/* Register a vterm and a slot index for use as a console (console_init) */
|
|
extern int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops);
|
|
|
|
/* register a vterm for hvc tty operation (module_init or hotplug add) */
|
|
extern struct hvc_struct * __devinit hvc_alloc(uint32_t vtermno, int irq,
|
|
struct hv_ops *ops, int outbuf_size);
|
|
/* remove a vterm from hvc tty operation (modele_exit or hotplug remove) */
|
|
extern int __devexit hvc_remove(struct hvc_struct *hp);
|
|
|
|
#endif // HVC_CONSOLE_H
|