litmus-rt.git - The LITMUS^RT kernel.

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author	Nick Piggin <nickpiggin@yahoo.com.au>	2005-11-13 19:07:23 -0500
committer	Linus Torvalds <torvalds@g5.osdl.org>	2005-11-13 21:14:15 -0500
commit	53e86b91b7ae66d4c2757195cbd42e00d9199cf2 (patch)
tree	80c44aeb046ac91a5bc7465da91a7b2519c53096 /include/asm-alpha/atomic.h
parent	dbdf65b1b7f8ec48bda1604cfea7ac09ce583d6b (diff)

[PATCH] i386: generic cmpxchg

- Make cmpxchg generally available on the i386 platform. - Provide emulation of cmpxchg suitable for uniprocessor if built and run on 386. From: Christoph Lameter <clameter@sgi.com> - Cut down patch and small style changes. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Diffstat (limited to 'include/asm-alpha/atomic.h')

0 files changed, 0 insertions, 0 deletions

/* * vio driver interface to hvc_console.c * * This code was moved here to allow the remaing code to be reused as a * generic polling mode with semi-reliable transport driver core to the * console and tty subsystems. * * * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM * Copyright (C) 2001 Paul Mackerras <paulus@au.ibm.com>, IBM * Copyright (C) 2004 Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp. * Copyright (C) 2004 IBM Corporation * * Additional Author(s): * Ryan S. Arnold <rsa@us.ibm.com> * * 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 */ #include <linux/types.h> #include <linux/init.h> #include <asm/hvconsole.h> #include <asm/vio.h> #include <asm/prom.h> #include "hvc_console.h" char hvc_driver_name[] = "hvc_console"; static struct vio_device_id hvc_driver_table[] __devinitdata = { {"serial", "hvterm1"}, { "", "" } }; MODULE_DEVICE_TABLE(vio, hvc_driver_table); static int filtered_get_chars(uint32_t vtermno, char *buf, int count) { unsigned long got; int i; /* * Vio firmware will read up to SIZE_VIO_GET_CHARS at its own discretion * so we play safe and avoid the situation where got > count which could * overload the flip buffer. */ if (count < SIZE_VIO_GET_CHARS) return -EAGAIN; got = hvc_get_chars(vtermno, buf, count); /* * Work around a HV bug where it gives us a null * after every \r. -- paulus */ for (i = 1; i < got; ++i) { if (buf[i] == 0 && buf[i-1] == '\r') { --got; if (i < got) memmove(&buf[i], &buf[i+1], got - i); } } return got; } static struct hv_ops hvc_get_put_ops = { .get_chars = filtered_get_chars, .put_chars = hvc_put_chars, }; static int __devinit hvc_vio_probe(struct vio_dev *vdev, const struct vio_device_id *id) { struct hvc_struct *hp; /* probed with invalid parameters. */ if (!vdev || !id) return -EPERM; hp = hvc_alloc(vdev->unit_address, vdev->irq, &hvc_get_put_ops); if (IS_ERR(hp)) return PTR_ERR(hp); dev_set_drvdata(&vdev->dev, hp); return 0; } static int __devexit hvc_vio_remove(struct vio_dev *vdev) { struct hvc_struct *hp = dev_get_drvdata(&vdev->dev); return hvc_remove(hp); } static struct vio_driver hvc_vio_driver = { .id_table = hvc_driver_table, .probe = hvc_vio_probe, .remove = hvc_vio_remove, .driver = { .name = hvc_driver_name, .owner = THIS_MODULE, } }; static int hvc_vio_init(void) { int rc; /* Register as a vio device to receive callbacks */ rc = vio_register_driver(&hvc_vio_driver); return rc; } module_init(hvc_vio_init); /* after drivers/char/hvc_console.c */ static void hvc_vio_exit(void) { vio_unregister_driver(&hvc_vio_driver); } module_exit(hvc_vio_exit); /* the device tree order defines our numbering */ static int hvc_find_vtys(void) { struct device_node *vty; int num_found = 0; for (vty = of_find_node_by_name(NULL, "vty"); vty != NULL; vty = of_find_node_by_name(vty, "vty")) { uint32_t *vtermno; /* We have statically defined space for only a certain number * of console adapters. */ if (num_found >= MAX_NR_HVC_CONSOLES) break; vtermno = (uint32_t *)get_property(vty, "reg", NULL); if (!vtermno) continue; if (device_is_compatible(vty, "hvterm1")) { hvc_instantiate(*vtermno, num_found, &hvc_get_put_ops); ++num_found; } } return num_found; } console_initcall(hvc_find_vtys);


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