137 lines
3.2 KiB
C
Executable file
137 lines
3.2 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2016 MediaTek Inc.
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*/
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#include <stdarg.h>
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/processor.h>
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#include <mt-plat/mboot_params.h>
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#include <mrdump.h>
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#include "mrdump_private.h"
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static unsigned long mrdump_output_lbaooo;
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void __mrdump_create_oops_dump(enum AEE_REBOOT_MODE reboot_mode,
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struct pt_regs *regs, const char *msg, ...)
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{
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va_list ap;
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struct mrdump_crash_record *crash_record;
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void *creg;
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int cpu;
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elf_gregset_t *reg;
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if (mrdump_cblock) {
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crash_record = &mrdump_cblock->crash_record;
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local_irq_disable();
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cpu = get_HW_cpuid();
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if (cpu < 0 || cpu >= nr_cpu_ids)
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return;
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switch (sizeof(unsigned long)) {
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case 4:
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reg = (elf_gregset_t *)&crash_record->cpu_reg[cpu].arm32_reg.arm32_regs;
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creg = (void *)&crash_record->cpu_reg[cpu].arm32_reg.arm32_creg;
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break;
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case 8:
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reg = (elf_gregset_t *)&crash_record->cpu_reg[cpu].arm64_reg.arm64_regs;
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creg = (void *)&crash_record->cpu_reg[cpu].arm64_reg.arm64_creg;
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break;
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default:
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BUILD_BUG();
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}
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if (cpu >= 0 && cpu < nr_cpu_ids) {
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/* null regs, no register dump */
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if (regs)
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elf_core_copy_kernel_regs(reg, regs);
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mrdump_save_control_register(creg);
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}
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va_start(ap, msg);
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vsnprintf(crash_record->msg, sizeof(crash_record->msg), msg,
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ap);
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va_end(ap);
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crash_record->fault_cpu = cpu;
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/* FIXME: Check reboot_mode is valid */
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crash_record->reboot_mode = reboot_mode;
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}
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}
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#if IS_ENABLED(CONFIG_SYSFS)
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static ssize_t mrdump_version_show(struct kobject *kobj,
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struct kobj_attribute *kattr, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%s", MRDUMP_GO_DUMP);
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}
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static struct kobj_attribute mrdump_version_attribute =
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__ATTR(mrdump_version, 0400, mrdump_version_show, NULL);
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static struct attribute *attrs[] = {
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&mrdump_version_attribute.attr,
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NULL,
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};
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static struct attribute_group attr_group = {
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.attrs = attrs,
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};
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#endif
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int __init mrdump_full_init(void)
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{
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mrdump_cblock->enabled = MRDUMP_ENABLE_COOKIE;
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/* TODO: remove flush APIs after full ramdump support HW_Reboot*/
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aee__flush_dcache_area(mrdump_cblock,
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sizeof(struct mrdump_control_block));
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pr_info("%s: MT-RAMDUMP enabled done\n", __func__);
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#if IS_ENABLED(CONFIG_SYSFS)
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if (sysfs_create_group(kernel_kobj, &attr_group)) {
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pr_notice("MT-RAMDUMP: sysfs create sysfs failed\n");
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return -ENOMEM;
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}
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#endif
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return 0;
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}
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static int param_set_mrdump_lbaooo(const char *val,
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const struct kernel_param *kp)
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{
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int retval = 0;
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if (mrdump_cblock) {
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retval = param_set_ulong(val, kp);
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if (!retval) {
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mrdump_cblock->output_fs_lbaooo = mrdump_output_lbaooo;
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/* TODO: remove flush APIs after full ramdump support HW_Reboot*/
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aee__flush_dcache_area(mrdump_cblock,
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sizeof(struct mrdump_control_block));
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}
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}
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return retval;
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}
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/* sys/modules/mrdump/parameter/lbaooo */
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struct kernel_param_ops param_ops_mrdump_lbaooo = {
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.set = param_set_mrdump_lbaooo,
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.get = param_get_ulong,
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};
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param_check_ulong(lbaooo, &mrdump_output_lbaooo);
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/* 0644: S_IRUGO | S_IWUSR */
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module_param_cb(lbaooo, ¶m_ops_mrdump_lbaooo, &mrdump_output_lbaooo,
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0644);
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__MODULE_PARM_TYPE(lbaooo, "ulong");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("MediaTek MRDUMP module");
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MODULE_AUTHOR("MediaTek Inc.");
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