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Author SHA1 Message Date
Joseph Chen fc7ff0f015 lib: bidram: add bidram_reserved_is_overlap() interface 
Check if the region is overlap with reserved regions.

Change-Id: Ifd9b6a4438dcf954b7e48930e31d0c6cd5d1274c
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
 2019-07-22 14:23:49 +08:00
Joseph Chen 356575c3e2 lib: bidram: handle only-one dram bank available situation 
LMB default init lmb->reserved.region[0] as zero.

Change-Id: Ib46d9630581bb3a03c5846288b16ae805e3e6944
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
 2019-03-29 18:29:19 +08:00
Joseph Chen 483d049321 lib: introduce bidram for GD board bi_dram[] memory management 
Some platform provides more than one dram banks and reserved firmware
regions (eg. ATF, OP-TEE, etc) by pre-loader dynamically. It means
there are memory holes in board dram layout. What's more, U-Boot will
reserved regions at the late bootflow(eg. firmware reserved for AMP).

So we introduce bidram mechanism to manage GD board bi_dram[], which
provides a way to easily manage memory holes and update bi_dram[]. It
dpends on LMB which provides a good algorithm to manage memory blocks.

What's different from sysmem?
- bidram manage and pass the avaliable memory blocks to kernel;
- sysmem is only for U-Boot memory management to avoid ram overlap,
  it doesn't matter about kernel avaliable memory.

Change-Id: I697cbb80bdc961e4ad5ab94548e2dc93feefde6f
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
 2019-03-26 11:04:33 +08:00