Messages in this thread | | | From | Suzuki K Poulose <> | Subject | [sample] A sample program for MRS emulation | Date | Wed, 30 Nov 2016 15:15:01 +0000 |
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Here is a sample program which demonstrates how to use mrs emulation to fetch the ID registers.
----8>---- /* * Sample program to demonstrate the MRS emulation * ABI. * Copyright (C) 2015-2016, ARM Ltd * * Author: Suzuki K Poulose <suzuki.poulose@arm.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. * 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. */
#include <stdio.h>
#define get_cpu_ftr(id) ({ \ unsigned long long __val; \ asm("mrs %0, "#id : "=r" (__val)); \ printf("%-20s: 0x%016lx\n", #id, __val); \ })
int main() {
get_cpu_ftr(ID_AA64ISAR0_EL1); get_cpu_ftr(ID_AA64ISAR1_EL1); get_cpu_ftr(ID_AA64MMFR0_EL1); get_cpu_ftr(ID_AA64MMFR1_EL1); get_cpu_ftr(ID_AA64PFR0_EL1); get_cpu_ftr(ID_AA64PFR1_EL1); get_cpu_ftr(ID_AA64DFR0_EL1); get_cpu_ftr(ID_AA64DFR1_EL1);
get_cpu_ftr(MIDR_EL1); get_cpu_ftr(MPIDR_EL1); get_cpu_ftr(REVIDR_EL1); return 0; }
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