95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/mm.h>
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#include <linux/uaccess.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/irq.h>
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#include <linux/sched.h>
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#include <linux/list.h>
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#include <linux/timer.h>
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#include <linux/workqueue.h>
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#include <mt-plat/mtk_device_apc.h>
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#include <mt-plat/sync_write.h>
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#include <mt-plat/dma.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include "mach/emi_mpu.h"
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#include <linux/arm-smccc.h>
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#include <linux/soc/mediatek/mtk_sip_svc.h>
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static void __iomem *emi_base;
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#if defined(CONFIG_ARM_PSCI) || defined(CONFIG_MTK_PSCI)
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static int is_emi_mpu_reg(unsigned int offset)
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{
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if ((offset >= EMI_MPU_START) && (offset <= EMI_MPU_END))
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return 1;
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return 0;
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}
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#endif
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void mt_emi_reg_write(unsigned int data, unsigned int offset)
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{
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#if defined(CONFIG_ARM_PSCI) || defined(CONFIG_MTK_PSCI)
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struct arm_smccc_res res;
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if (is_emi_mpu_reg(offset)) {
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arm_smccc_smc(MTK_SIP_KERNEL_EMIMPU_WRITE, offset,data, 0, 0, 0, 0, 0, &res);
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return;
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}
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#endif
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if (emi_base)
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mt_reg_sync_writel(data, emi_base + offset);
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}
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unsigned int mt_emi_reg_read(unsigned int offset)
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{
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#if defined(CONFIG_ARM_PSCI) || defined(CONFIG_MTK_PSCI)
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struct arm_smccc_res res;
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if (is_emi_mpu_reg(offset))
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arm_smccc_smc(MTK_SIP_KERNEL_EMIMPU_READ, offset,0, 0, 0, 0, 0, 0, &res);
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return res.a0;
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#endif
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if (emi_base)
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return readl((const void __iomem *)(emi_base + offset));
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return 0;
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}
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int mt_emi_mpu_set_region_protection(unsigned long long start,
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unsigned long long end,
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unsigned int region_permission)
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{
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#ifdef CONFIG_ARM64
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#if defined(CONFIG_ARM_PSCI) || defined(CONFIG_MTK_PSCI)
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struct arm_smccc_res res;
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arm_smccc_smc(MTK_SIP_KERNEL_EMIMPU_SET, start,end, region_permission, 0, 0, 0, 0, &res);
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return 0;
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#endif
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#endif
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return 0;
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}
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void mt_emi_reg_base_set(void *base)
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{
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emi_base = base;
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}
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void *mt_emi_reg_base_get(void)
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{
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return emi_base;
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}
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