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| -rw-r--r-- | docs/porting-guide.md | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/porting-guide.md b/docs/porting-guide.md index 0d713c4a..aaa6db6e 100644 --- a/docs/porting-guide.md +++ b/docs/porting-guide.md @@ -448,6 +448,14 @@ must also be defined: Defines the maximum number of open IO handles. Attempting to open more IO entities than this value using `io_open()` will fail with -ENOMEM. +* **#define : MAX_IO_BLOCK_DEVICES** + + Defines the maximum number of registered IO block devices. Attempting to + register more devices this value using `io_dev_open()` will fail + with -ENOMEM. MAX_IO_BLOCK_DEVICES should be less than MAX_IO_DEVICES. + With this macro, multiple block devices could be supported at the same + time. + If the platform needs to allocate data within the per-cpu data framework in BL31, it should define the following macro. Currently this is only required if the platform decides not to use the coherent memory section by undefining the |