forked from Minki/linux
4e508b259e
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
30 lines
541 B
C
30 lines
541 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2015-2016 MediaTek Inc.
|
|
* Author: Yong Wu <yong.wu@mediatek.com>
|
|
*/
|
|
#ifndef MTK_IOMMU_SMI_H
|
|
#define MTK_IOMMU_SMI_H
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/device.h>
|
|
|
|
#if IS_ENABLED(CONFIG_MTK_SMI)
|
|
|
|
enum iommu_atf_cmd {
|
|
IOMMU_ATF_CMD_CONFIG_SMI_LARB, /* For mm master to en/disable iommu */
|
|
IOMMU_ATF_CMD_MAX,
|
|
};
|
|
|
|
#define MTK_SMI_MMU_EN(port) BIT(port)
|
|
|
|
struct mtk_smi_larb_iommu {
|
|
struct device *dev;
|
|
unsigned int mmu;
|
|
unsigned char bank[32];
|
|
};
|
|
|
|
#endif
|
|
|
|
#endif
|