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For concerns about security, the register to enable/disable IOMMU of SMI LARB should only be configured in secure world. Thus, we add some SMC command for multimedia master to enable/disable MM IOMMU in ATF by setting the register of SMI LARB. This function is prepared for MT8188. Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220817124608.10062-4-chengci.xu@mediatek.com
29 lines
541 B
C
29 lines
541 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2015-2016 MediaTek Inc.
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* Author: Yong Wu <yong.wu@mediatek.com>
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*/
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#ifndef MTK_IOMMU_SMI_H
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#define MTK_IOMMU_SMI_H
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#include <linux/bitops.h>
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#include <linux/device.h>
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#if IS_ENABLED(CONFIG_MTK_SMI)
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enum iommu_atf_cmd {
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IOMMU_ATF_CMD_CONFIG_SMI_LARB, /* For mm master to en/disable iommu */
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IOMMU_ATF_CMD_MAX,
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};
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#define MTK_SMI_MMU_EN(port) BIT(port)
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struct mtk_smi_larb_iommu {
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struct device *dev;
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unsigned int mmu;
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unsigned char bank[32];
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};
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#endif
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#endif
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