diff options
Diffstat (limited to 'drivers/char/ramoops.c')
| -rw-r--r-- | drivers/char/ramoops.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/drivers/char/ramoops.c b/drivers/char/ramoops.c deleted file mode 100644 index 73dcb0ee41f..00000000000 --- a/drivers/char/ramoops.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * RAM Oops/Panic logger - * - * Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - * 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., 51 Franklin St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/kmsg_dump.h> -#include <linux/time.h> -#include <linux/io.h> -#include <linux/ioport.h> -#include <linux/platform_device.h> -#include <linux/ramoops.h> - -#define RAMOOPS_KERNMSG_HDR "====" -#define RAMOOPS_HEADER_SIZE (5 + sizeof(struct timeval)) - -#define RECORD_SIZE 4096 - -static ulong mem_address; -module_param(mem_address, ulong, 0400); -MODULE_PARM_DESC(mem_address, - "start of reserved RAM used to store oops/panic logs"); - -static ulong mem_size; -module_param(mem_size, ulong, 0400); -MODULE_PARM_DESC(mem_size, - "size of reserved RAM used to store oops/panic logs"); - -static int dump_oops = 1; -module_param(dump_oops, int, 0600); -MODULE_PARM_DESC(dump_oops, - "set to 1 to dump oopses, 0 to only dump panics (default 1)"); - -static struct ramoops_context { - struct kmsg_dumper dump; - void *virt_addr; - phys_addr_t phys_addr; - unsigned long size; - int count; - int max_count; -} oops_cxt; - -static void ramoops_do_dump(struct kmsg_dumper *dumper, - enum kmsg_dump_reason reason, const char *s1, unsigned long l1, - const char *s2, unsigned long l2) -{ - struct ramoops_context *cxt = container_of(dumper, - struct ramoops_context, dump); - unsigned long s1_start, s2_start; - unsigned long l1_cpy, l2_cpy; - int res; - char *buf; - struct timeval timestamp; - - /* Only dump oopses if dump_oops is set */ - if (reason == KMSG_DUMP_OOPS && !dump_oops) - return; - - buf = (char *)(cxt->virt_addr + (cxt->count * RECORD_SIZE)); - memset(buf, '\0', RECORD_SIZE); - res = sprintf(buf, "%s", RAMOOPS_KERNMSG_HDR); - buf += res; - do_gettimeofday(×tamp); - res = sprintf(buf, "%lu.%lu\n", (long)timestamp.tv_sec, (long)timestamp.tv_usec); - buf += res; - - l2_cpy = min(l2, (unsigned long)(RECORD_SIZE - RAMOOPS_HEADER_SIZE)); - l1_cpy = min(l1, (unsigned long)(RECORD_SIZE - RAMOOPS_HEADER_SIZE) - l2_cpy); - - s2_start = l2 - l2_cpy; - s1_start = l1 - l1_cpy; - - memcpy(buf, s1 + s1_start, l1_cpy); - memcpy(buf + l1_cpy, s2 + s2_start, l2_cpy); - - cxt->count = (cxt->count + 1) % cxt->max_count; -} - -static int __init ramoops_probe(struct platform_device *pdev) -{ - struct ramoops_platform_data *pdata = pdev->dev.platform_data; - struct ramoops_context *cxt = &oops_cxt; - int err = -EINVAL; - - if (pdata) { - mem_size = pdata->mem_size; - mem_address = pdata->mem_address; - } - - if (!mem_size) { - printk(KERN_ERR "ramoops: invalid size specification"); - goto fail3; - } - - rounddown_pow_of_two(mem_size); - - if (mem_size < RECORD_SIZE) { - printk(KERN_ERR "ramoops: size too small"); - goto fail3; - } - - cxt->max_count = mem_size / RECORD_SIZE; - cxt->count = 0; - cxt->size = mem_size; - cxt->phys_addr = mem_address; - - if (!request_mem_region(cxt->phys_addr, cxt->size, "ramoops")) { - printk(KERN_ERR "ramoops: request mem region failed"); - err = -EINVAL; - goto fail3; - } - - cxt->virt_addr = ioremap(cxt->phys_addr, cxt->size); - if (!cxt->virt_addr) { - printk(KERN_ERR "ramoops: ioremap failed"); - goto fail2; - } - - cxt->dump.dump = ramoops_do_dump; - err = kmsg_dump_register(&cxt->dump); - if (err) { - printk(KERN_ERR "ramoops: registering kmsg dumper failed"); - goto fail1; - } - - return 0; - -fail1: - iounmap(cxt->virt_addr); -fail2: - release_mem_region(cxt->phys_addr, cxt->size); -fail3: - return err; -} - -static int __exit ramoops_remove(struct platform_device *pdev) -{ - struct ramoops_context *cxt = &oops_cxt; - - if (kmsg_dump_unregister(&cxt->dump) < 0) - printk(KERN_WARNING "ramoops: could not unregister kmsg_dumper"); - - iounmap(cxt->virt_addr); - release_mem_region(cxt->phys_addr, cxt->size); - return 0; -} - -static struct platform_driver ramoops_driver = { - .remove = __exit_p(ramoops_remove), - .driver = { - .name = "ramoops", - .owner = THIS_MODULE, - }, -}; - -static int __init ramoops_init(void) -{ - return platform_driver_probe(&ramoops_driver, ramoops_probe); -} - -static void __exit ramoops_exit(void) -{ - platform_driver_unregister(&ramoops_driver); -} - -module_init(ramoops_init); -module_exit(ramoops_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Marco Stornelli <marco.stornelli@gmail.com>"); -MODULE_DESCRIPTION("RAM Oops/Panic logger/driver"); |