66 lines
1.5 KiB
C
Executable File
66 lines
1.5 KiB
C
Executable File
/*
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* sec_debug_init_log.c
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*
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* Copyright (c) 2016 Samsung Electronics Co., Ltd
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* http://www.samsung.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/sec_debug.h>
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static char *buf_ptr;
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static unsigned long buf_size;
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static unsigned long buf_idx;
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size_t sec_debug_get_curr_init_ptr(void)
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{
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#ifdef CONFIG_SEC_DEBUG_SYSRQ_KMSG
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if (!buf_ptr || !buf_size)
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return 0;
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else
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return (size_t)(buf_ptr + buf_idx);
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#endif
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return 0;
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}
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static void sec_debug_hook_init_log(const char *str, size_t size)
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{
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int len;
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if (buf_idx + size > buf_size) {
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len = buf_size - buf_idx;
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memcpy(buf_ptr + buf_idx, str, len);
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memcpy(buf_ptr, str + len, size - len);
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buf_idx = size - len;
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} else {
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memcpy(buf_ptr + buf_idx, str, size);
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buf_idx = (buf_idx + size) % buf_size;
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}
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}
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static int __init sec_debug_init_init_log(void)
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{
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pr_err("%s: start\n", __func__);
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buf_ptr = (char *)phys_to_virt((sec_debug_get_buf_base(SDN_MAP_INITTASK_LOG)));
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buf_size = sec_debug_get_buf_size(SDN_MAP_INITTASK_LOG);
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pr_err("%s: buffer size 0x%llx at addr 0x%llx\n", __func__, buf_size ,buf_ptr);
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if (!buf_ptr || !buf_size)
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return 0;
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memset(buf_ptr, 0, buf_size);
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register_init_log_hook_func(sec_debug_hook_init_log);
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pr_err("%s: done\n", __func__);
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return 0;
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}
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late_initcall(sec_debug_init_init_log);
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