Commit Graph

5 Commits

Author SHA1 Message Date
Anup Patel
2dfed32c46 lib: Add a simple brain-dead allocator to manage extra scratch space
We have extra space above scratch space (sbi_scratch) which we are
currently using to manage per-HART IPI data and TLB request management.

In future, more parts of OpenSBI will use the extra scratch space so
it will become difficult to manage extra scratch space using just
defines and macros.

This patch adds a simple brain-dead allocator to manage extra scratch
space. This allocator never expects anything to be free-ed hence it
keeps incrementing to next allocation offset until it runs-out of space.

In future, we can have more sophisticated allocator which will allow
us to re-claim free-ed space and also allows us to track owner of
allocated space.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-24 08:22:47 +05:30
Olof Johansson
fbf986ac2a all: Annotate some tables to have clang-format leave them alone
One of the shortcomings of clang-format is that it doesn't allow
for aligned define tables, which is used for a number of constants.

Add annotation to disable the automatic formatting where needed.

Signed-off-by: Olof Johansson <olof@lixom.net>
2019-04-24 09:49:46 +05:30
Anup Patel
9dc95021db lib: More improvements to sbi_fifo
This patch does following improvements to sbi_fifo:
1. Use valid SBI_Exxxx error codes instead of -1
2. The sbi_fifo_is_full() and sbi_fifo_is_empty() did
   not acquire qlock before accessing head and tail
   hence fixed it
3. Added avail member for ease in debugging and simplifying
   head/tail updates.

Due to above changes size of sbi_fifo changes from 48 bytes
to 56 bytes.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-04-03 13:48:38 -07:00
Anup patel
20990ee0ab all: Update copyright header in all files
This patch updates copyright header in all files as follows:
1. Makes "SPDX-License-Identifier: BSD-2-Clause" as first line
2. Change copyright year to 2019 for Western Digital

Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-01-24 14:07:47 +05:30
Anup Patel
9e8ff05cb6 Initial commit.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
2018-12-11 19:24:06 +05:30