[PATCH v5 09/20] iommu/mediatek: Refine protect memory definition

Yong Wu
2019-01-01T03:59:24Z

The protect memory setting is a little different in the different SoCs.
In the register REG_MMU_CTRL_REG(0x110), the TF_PROT(translation fault
protect) shift bit is normally 4 while it shift 5 bits only in the
mt8173. This patch delete the complex MACRO and use a common if-else
instead.

Also, use "F_MMU_TF_PROT_TO_PROGRAM_ADDR" instead of the hard code(2)
which means the M4U will output the dirty data to the programmed
address that we allocated dynamically when translation fault occurs.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
@Nicalos, I don't put it in the plat_data since only the previous mt8173
shift 5. As I know, the latest SoC always use the new setting like mt2712
and mt8183. Thus, I think it is unnecessary to put it in plat_data and
let all the latest SoC set it. Hence, I still keep "== mt8173" for this
like the reg REG_MMU_CTRL_REG.
---
drivers/iommu/mtk_iommu.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index eca1536..35a1263 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -53,11 +53,7 @@

#define REG_MMU_CTRL_REG 0x110
#define F_MMU_PREFETCH_RT_REPLACE_MOD BIT(4)
-#define F_MMU_TF_PROTECT_SEL_SHIFT(data) \
- ((data)->plat_data->m4u_plat == M4U_MT2712 ? 4 : 5)
-/* It's named by F_MMU_TF_PROT_SEL in mt2712. */
-#define F_MMU_TF_PROTECT_SEL(prot, data) \
- (((prot) & 0x3) << F_MMU_TF_PROTECT_SEL_SHIFT(data))
+#define F_MMU_TF_PROT_TO_PROGRAM_ADDR 2

#define REG_MMU_IVRP_PADDR 0x114

@@ -521,9 +517,11 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
return ret;
}

- regval = F_MMU_TF_PROTECT_SEL(2, data);
if (data->plat_data->m4u_plat == M4U_MT8173)
- regval |= F_MMU_PREFETCH_RT_REPLACE_MOD;
+ regval = F_MMU_PREFETCH_RT_REPLACE_MOD |
+ (F_MMU_TF_PROT_TO_PROGRAM_ADDR << 5);
+ else
+ regval = F_MMU_TF_PROT_TO_PROGRAM_ADDR << 4;
writel_relaxed(regval, data->base + REG_MMU_CTRL_REG);

regval = F_L2_MULIT_HIT_EN |
--
1.9.1