mirror of
https://github.com/hardkernel/kernel_common_drivers.git
synced 2026-06-25 12:03:48 +09:00
Yan Wang
76cd63506b
PD#SWPL-175090 Problem: check mte enable/disable, if mte disable, update flag to notify AO CPU. Solution: if mte disable, update flag to notify AO CPU. Verify: BL201 Change-Id: Ic1416ae5262b548f681a02ccbe15e4d98f0dc532 Signed-off-by: Yan Wang <yan.wang@amlogic.com>
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (c) 2019 Amlogic, Inc. All rights reserved.
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*/
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#if IS_ENABLED(CONFIG_ARM64_MTE)
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#include <linux/irqflags.h>
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#include <linux/moduleparam.h>
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#include <linux/module.h>
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#include <linux/cpuset.h>
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#include <linux/sched/isolation.h>
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#include <linux/amlogic/gki_module.h>
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#include <linux/sched.h>
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#include <asm/cpufeature.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/errno.h>
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#include <linux/of_address.h>
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static void __iomem *debug_mte_reg;
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/* SYSCTRL_DEBUG_REG4[0]=0b1: stop writing MTE clock */
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#define MTE_CLK_STOP BIT(0)
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int aml_debug_mte_init(void)
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{
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struct device_node *node;
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unsigned int val;
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if (!system_supports_mte()) {
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node = of_find_node_by_path("/mte_debug");
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if (!node) {
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pr_info("no mte_debug node\n");
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return -EINVAL;
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}
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debug_mte_reg = of_iomap(node, 0);
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if (!debug_mte_reg) {
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pr_info("mte_debug map fail\n");
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return -ENOMEM;
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}
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val = readl_relaxed(debug_mte_reg);
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val |= MTE_CLK_STOP;
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writel_relaxed(val, debug_mte_reg);
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pr_info("mte disabled\n");
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} else {
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pr_info("mte enabled\n");
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}
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return 0;
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}
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void aml_debug_mte_exit(void)
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{
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if (debug_mte_reg)
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iounmap(debug_mte_reg);
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}
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#endif
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