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author | Yong Wu <yong.wu@mediatek.com> | 2018-03-18 09:52:54 +0800 |
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committer | Joerg Roedel <jroedel@suse.de> | 2018-03-21 06:13:57 -0500 |
commit | 70ca608b2ec6dafa6bb1c2b0691852fc78f8f717 (patch) | |
tree | 9e1bc273b91fefbde05e482bd7a7539ba37430a4 /arch/m68k/Kconfig.devices | |
parent | f3e827d73ed454053d2ce6a4bf021b5adde3ac54 (diff) |
iommu/mediatek: Fix protect memory setting
In MediaTek's IOMMU design, When a iommu translation fault occurs
(HW can NOT translate the destination address to a valid physical
address), the IOMMU HW output the dirty data into a special memory
to avoid corrupting the main memory, this is called "protect memory".
the register(0x114) for protect memory is a little different between
mt8173 and mt2712.
In the mt8173, bit[30:6] in the register represents [31:7] of the
physical address. In the 4GB mode, the register bit[31] should be 1.
While in the mt2712, the bits don't shift. bit[31:7] in the register
represents [31:7] in the physical address, and bit[1:0] in the
register represents bit[33:32] of the physical address if it has.
Fixes: e6dec9230862 ("iommu/mediatek: Add mt2712 IOMMU support")
Reported-by: Honghui Zhang <honghui.zhang@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'arch/m68k/Kconfig.devices')
0 files changed, 0 insertions, 0 deletions