[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/char/ramoops.c b/ap/os/linux/linux-3.4.x/drivers/char/ramoops.c
new file mode 100644
index 0000000..2a5e45d
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/char/ramoops.c
@@ -0,0 +1,250 @@
+/*
+ * 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
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/err.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/slab.h>
+#include <linux/ramoops.h>
+
+#define RAMOOPS_KERNMSG_HDR "===="
+#define MIN_MEM_SIZE 4096UL
+
+static ulong record_size = MIN_MEM_SIZE;
+module_param(record_size, ulong, 0400);
+MODULE_PARM_DESC(record_size,
+ "size of each dump done on oops/panic");
+
+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;
+ unsigned long record_size;
+ int dump_oops;
+ int count;
+ int max_count;
+} oops_cxt;
+
+static struct platform_device *dummy;
+static struct ramoops_platform_data *dummy_data;
+
+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, hdr_size;
+ char *buf, *buf_orig;
+ struct timeval timestamp;
+
+ if (reason != KMSG_DUMP_OOPS &&
+ reason != KMSG_DUMP_PANIC)
+ return;
+
+ /* Only dump oopses if dump_oops is set */
+ if (reason == KMSG_DUMP_OOPS && !cxt->dump_oops)
+ return;
+
+ buf = cxt->virt_addr + (cxt->count * cxt->record_size);
+ buf_orig = buf;
+
+ memset(buf, '\0', cxt->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;
+
+ hdr_size = buf - buf_orig;
+ l2_cpy = min(l2, cxt->record_size - hdr_size);
+ l1_cpy = min(l1, cxt->record_size - hdr_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->record_size) {
+ pr_err("The memory size and the record size must be "
+ "non-zero\n");
+ goto fail3;
+ }
+
+ pdata->mem_size = rounddown_pow_of_two(pdata->mem_size);
+ pdata->record_size = rounddown_pow_of_two(pdata->record_size);
+
+ /* Check for the minimum memory size */
+ if (pdata->mem_size < MIN_MEM_SIZE &&
+ pdata->record_size < MIN_MEM_SIZE) {
+ pr_err("memory size too small, minium is %lu\n", MIN_MEM_SIZE);
+ goto fail3;
+ }
+
+ if (pdata->mem_size < pdata->record_size) {
+ pr_err("The memory size must be larger than the "
+ "records size\n");
+ goto fail3;
+ }
+
+ cxt->max_count = pdata->mem_size / pdata->record_size;
+ cxt->count = 0;
+ cxt->size = pdata->mem_size;
+ cxt->phys_addr = pdata->mem_address;
+ cxt->record_size = pdata->record_size;
+ cxt->dump_oops = pdata->dump_oops;
+
+ if (!request_mem_region(cxt->phys_addr, cxt->size, "ramoops")) {
+ pr_err("request mem region failed\n");
+ err = -EINVAL;
+ goto fail3;
+ }
+
+ cxt->virt_addr = ioremap(cxt->phys_addr, cxt->size);
+ if (!cxt->virt_addr) {
+ pr_err("ioremap failed\n");
+ goto fail2;
+ }
+
+ cxt->dump.dump = ramoops_do_dump;
+ err = kmsg_dump_register(&cxt->dump);
+ if (err) {
+ pr_err("registering kmsg dumper failed\n");
+ goto fail1;
+ }
+
+ /*
+ * Update the module parameter variables as well so they are visible
+ * through /sys/module/ramoops/parameters/
+ */
+ mem_size = pdata->mem_size;
+ mem_address = pdata->mem_address;
+ record_size = pdata->record_size;
+ dump_oops = pdata->dump_oops;
+
+ 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)
+ pr_warn("could not unregister kmsg_dumper\n");
+
+ 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)
+{
+ int ret;
+ ret = platform_driver_probe(&ramoops_driver, ramoops_probe);
+ if (ret == -ENODEV) {
+ /*
+ * If we didn't find a platform device, we use module parameters
+ * building platform data on the fly.
+ */
+ pr_info("platform device not found, using module parameters\n");
+ dummy_data = kzalloc(sizeof(struct ramoops_platform_data),
+ GFP_KERNEL);
+ if (!dummy_data)
+ return -ENOMEM;
+ dummy_data->mem_size = mem_size;
+ dummy_data->mem_address = mem_address;
+ dummy_data->record_size = record_size;
+ dummy_data->dump_oops = dump_oops;
+ dummy = platform_create_bundle(&ramoops_driver, ramoops_probe,
+ NULL, 0, dummy_data,
+ sizeof(struct ramoops_platform_data));
+
+ if (IS_ERR(dummy))
+ ret = PTR_ERR(dummy);
+ else
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static void __exit ramoops_exit(void)
+{
+ platform_driver_unregister(&ramoops_driver);
+ kfree(dummy_data);
+}
+
+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");