threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/*
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* POWER Data Stream Control Register (DSCR) explicit test
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*
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* This test modifies the DSCR value using mtspr instruction and
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* verifies the change with mfspr instruction. It uses both the
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* privilege state SPR and the problem state SPR for this purpose.
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*
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* When using the privilege state SPR, the instructions such as
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* mfspr or mtspr are priviledged and the kernel emulates them
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* for us. Instructions using problem state SPR can be exuecuted
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* directly without any emulation if the HW supports them. Else
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* they also get emulated by the kernel.
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*
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* Copyright 2012, Anton Blanchard, IBM Corporation.
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* Copyright 2015, Anshuman Khandual, IBM Corporation.
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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 version 2 as published
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* by the Free Software Foundation.
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*/
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#include "dscr.h"
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int dscr_explicit(void)
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{
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unsigned long i, dscr = 0;
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srand(getpid());
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set_dscr(dscr);
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for (i = 0; i < COUNT; i++) {
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unsigned long cur_dscr, cur_dscr_usr;
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double ret = uniform_deviate(rand());
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if (ret < 0.001) {
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dscr++;
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if (dscr > DSCR_MAX)
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dscr = 0;
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set_dscr(dscr);
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}
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cur_dscr = get_dscr();
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if (cur_dscr != dscr) {
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fprintf(stderr, "Kernel DSCR should be %ld but "
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"is %ld\n", dscr, cur_dscr);
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return 1;
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}
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ret = uniform_deviate(rand());
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if (ret < 0.001) {
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dscr++;
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if (dscr > DSCR_MAX)
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dscr = 0;
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set_dscr_usr(dscr);
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}
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cur_dscr_usr = get_dscr_usr();
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if (cur_dscr_usr != dscr) {
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fprintf(stderr, "User DSCR should be %ld but "
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"is %ld\n", dscr, cur_dscr_usr);
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return 1;
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}
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}
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return 0;
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}
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int main(int argc, char *argv[])
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{
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return test_harness(dscr_explicit, "dscr_explicit_test");
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}
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