u-boot.git/lib/efi_loader/efi_runtime.c, branch v2018.05

efi_loader: Fix return value for efi_add_runtime_mmio

2018-04-04T09:09:06+00:00

The efi_add_runtime_mmio function incorrectly returned the added
address as return value rather than EFI_SUCCESS. Fix it by checking
the return value of efi_add_memory_map properly.

Fixes: f057cfef5dc ("efi_loader: exit status for efi_reset_system_init")
Signed-off-by: Alexander Graf

efi_loader: add missing EFI_RESET_PLATFORM_SPECIFIC

2018-04-04T09:00:07+00:00

EFI_RESET_PLATFORM_SPECIFIC is one of the values that can be used for the
EFI service ResetSystem. The missing definition is added. The value has to
handled in efi_reset_system().

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: implement event groups

2018-04-04T09:00:07+00:00

If an event of a group event is signaled all other events of the same
group are signaled too.

Function efi_signal_event is renamed to efi_queue_event.
A new function efi_signal_event is introduced that checks if an event
belongs to a group and than signals all events of the group.
Event group notifciation is implemented for ExitBootServices,
InstallConfigurationTable, and ResetSystem.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: efi_get_time_init should return status code

2018-04-04T09:00:06+00:00

All EFI initialization functions should return a status code.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: exit status for efi_reset_system_init

2018-04-04T09:00:06+00:00

efi_reset_system_init provides the architecture or board specific
initialization of the EFI subsystem. Errors should be caught and
signalled by a return code.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: add missing runtime services stubs

2018-02-09T23:25:49+00:00

Add stubs for UpdateCapsule, QueryCapsuleCapabilities, and
QueryVariableInfo.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: efi variable support

2017-09-20T09:00:57+00:00

Add EFI variable support, mapping to u-boot environment variables.
Variables are pretty important for setting up boot order, among other
things.  If the board supports saveenv, then it will be called in
ExitBootServices() to persist variables set by the efi payload.  (For
example, fallback.efi configuring BootOrder and BootXXXX load-option
variables.)

Variables are *not* currently exposed at runtime, post ExitBootServices.
On boards without a dedicated device for storage, which the loaded OS
is not trying to also use, this is rather tricky.  One idea, at least
for boards that can persist RAM across reboot, is to keep a "journal"
of modified variables in RAM, and then turn halt into a reboot into
u-boot, plus store variables, plus halt.  Whatever the solution, it
likely involves some per-board support.

Mapping between EFI variables and u-boot variables:

  efi_$guid_$varname = {attributes}(type)value

For example:

  efi_8be4df61-93ca-11d2-aa0d-00e098032b8c_OsIndicationsSupported=
     "{ro,boot,run}(blob)0000000000000000"
  efi_8be4df61-93ca-11d2-aa0d-00e098032b8c_BootOrder=
     "(blob)00010000"

The attributes are a comma separated list of these possible
attributes:

  + ro   - read-only
  + boot - boot-services access
  + run  - runtime access

NOTE: with current implementation, no variables are available after
ExitBootServices, and all are persisted (if possible).

If not specified, the attributes default to "{boot}".

The required type is one of:

  + utf8 - raw utf8 string
  + blob - arbitrary length hex string

Signed-off-by: Rob Clark 
Signed-off-by: Alexander Graf

efi_loader: avoid obscure constants in efi_runtime.c

2017-09-18T21:53:56+00:00

We should use the predefined constants EFI_PAGE_SHIFT
and EFI_PAGE_MASK where applicable.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: use EFI_PAGE_MASK instead of EFI_PAGE_SIZE - 1

2017-08-12T12:05:45+00:00

We should be consistent in the way we calculate page sizes.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: Rename EFI_RUNTIME_{TEXT, DATA} to __efi_runtime{, _data}

2016-10-19T07:01:54+00:00

Compiler attributes are more commonly __foo style tags rather than big
upper case eye sores like EFI_RUNTIME_TEXT.

Simon Glass felt quite strongly about this, so this patch converts our
existing defines over to more eye friendly ones.

Signed-off-by: Alexander Graf 
Reviewed-by: Simon Glass