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2d026a316a
DMA and CPU address view is different, we need to convert them:
+--------+ +--------+ +---------+ +--------+
| | | | | | | |
| CPUs | | DEV0 | | IOMMU <----+ | DEV1 |
| | | | | | | | |
+----+---+ +----+---+ +----+----+ | +----+---+
| | | | |
0x200000 | 0x1000 | 0x1000 | | 0x8000 |
| | | | |
+-------------+-----------+ +----------+
|
|
+--------v----------------------------------------------------+
| |
| Address BUS |
| |
+-------------------------------------------------------------+
Signed-off-by: GuEe-GUI <2991707448@qq.com>