u-boot.git/common/bootstage.c, branch v2017.07

bootstage: Adjust to use const * where possible

2017-06-05T18:13:08+00:00

There are a few places that should use const *, such as
bootstage_unstash(). Update these to make it clearer when parameters are
changed.

Signed-off-by: Simon Glass

bootstage: Tidy up error return values

2017-06-05T18:13:08+00:00

We should return a proper error number instead of just -1. This helps the
caller to determine what when wrong. Update a few functions to fix this.

Signed-off-by: Simon Glass

bootstage: Support relocating boostage data

2017-06-05T18:13:06+00:00

Some boards cannot access pre-relocation data after relocation. Reserve
space for this and copy it during preparation for relocation.

Signed-off-by: Simon Glass

bootstage: Use debug() for stashing messages

2017-06-05T18:13:06+00:00

We don't normally want to see these messages. Change them to debug-only.

Signed-off-by: Simon Glass

bootstage: Show records with a zero time

2017-06-05T18:13:06+00:00

We can now use the record count to determine whether a record is valid or
not. Drop the test for a zero time.

Signed-off-by: Simon Glass

bootstage: Use rec_count as the array index

2017-06-05T18:13:05+00:00

At present bootstage has a large array with all possible bootstage IDs
recorded. It adds times to the array element indexed by the ID. This is
inefficient because many IDs are not used during boot. We can save space
by only recording those IDs which actually have timestamps.

Update the array to use a record count, which increments with each
addition of a new timestamp. This takes longer to record a time, since it
may involve an array search. Such a search may be particularly expensive
before relocation when the CPU is running slowly or the cache is off. But
at that stage there should be very few records.

Signed-off-by: Simon Glass

bootstage: Fix up code style and comments

2017-06-05T18:13:05+00:00

There are several code style and comment nits. Fix them and also remove
the comment about passing bootstage to the kernel being TBD. This is
already supported.

Signed-off-by: Simon Glass

bootstage: Convert to use malloc()

2017-06-05T18:13:04+00:00

At present bootstage uses the data section of the image to store its
information. There are a few problems with this:

- It does not work on all boards (e.g. those which run from flash before
relocation)
- Allocated strings still point back to the pre-relocation data after
relocation

Now that U-Boot has a pre-relocation malloc() we can use this instead,
with a pointer to the data in global_data. Update bootstage to do this and
set up an init routine to allocate the memory.

Now that we have a real init function, we can drop the fake 'reset' record
and add a normal one instead.

Note that part of the problem with allocated strings remains. They are
reallocated but this will only work where pre-relocation memory is
accessible after relocation.

Signed-off-by: Simon Glass

bootstage: Require timer_get_boot_us() to be defined

2017-06-05T18:13:04+00:00

At present we provide a default version of this function for use by
bootstage. However it uses the system timer and therefore likely requires
driver model. This makes it impossible to time driver-model init.

Drop the function and require boards to provide their own. Add a sandbox
version also. There is a default implememtation in lib/time.c for boards
which use CONFIG_SYS_TIMER_COUNTER.

Signed-off-by: Simon Glass

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24T13:44:38+00:00

Signed-off-by: Wolfgang Denk 
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini