61 lines
1.4 KiB
C
Executable File
61 lines
1.4 KiB
C
Executable File
/*
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* Set OEM flags
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*
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* Copyright (C) 2018 Samsung Electronics, Inc.
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* Jonghun Song, <justin.song@samsung.com>
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* Egor Ulesykiy, <e.uelyskiy@samsung.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include "oemflag_arch.h"
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#define SMC_SET_FUSE 0x83000004
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#define SMC_GET_FUSE 0x83000003
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static uint32_t run_cmd_kinibi(uint32_t cmd, uint32_t arg1,
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uint32_t arg2, uint32_t arg3)
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{
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register u64 reg0 __asm__("x0") = cmd;
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register u64 reg1 __asm__("x1") = arg1;
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register u64 reg2 __asm__("x2") = arg2;
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register u64 reg3 __asm__("x3") = arg3;
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__asm__ volatile (
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"dsb sy\n"
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"smc 0\n"
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: "+r"(reg0), "+r"(reg1), "+r"(reg2), "+r"(reg3)
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);
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return reg1;
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}
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int set_tamper_fuse(enum oemflag_id name)
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{
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int ret;
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ret = run_cmd_kinibi(SMC_SET_FUSE, 0, name, 0);
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return ret;
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}
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int get_tamper_fuse(enum oemflag_id name)
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{
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int ret;
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pr_info("[oemflag]kinibi cmd\n");
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ret = run_cmd_kinibi(SMC_GET_FUSE, 1, name, 0);
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return ret;
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}
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