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OvmfPkg: PlatformDxe: connect ExtractConfig() to platform data 

Establish the full stack of conversions in retrieving the platform
configuration:

    MultiConfigAltResp       -- form engine / HII communication
            ^
            |
     [BlockToConfig]
            |
     MAIN_FORM_STATE         -- binary representation of form/widget state
            ^
            |
[PlatformConfigToFormState]
            |
     PLATFORM_CONFIG         -- accessible to DXE and UEFI drivers
            ^
            |
   [PlatformConfigLoad]
            |
  UEFI non-volatile variable -- accessible to external utilities

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15374 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Laszlo Ersek 2014-03-22 07:14:03 +00:00 committed by jljusten
parent 1df57ba3e6
commit cbd08bcc17
1 changed files with 86 additions and 4 deletions
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90
OvmfPkg/PlatformDxe/Platform.c
View File

@ -15,6 +15,7 @@
**/
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/DevicePathLib.h>
#include <Library/HiiLib.h>
@ -125,6 +126,79 @@ STATIC UINTN mNumGopModes;
STATIC GOP_MODE *mGopModes;
/**
Load the persistent platform configuration and translate it to binary form
state.
If the platform configuration is missing, then the function fills in a
default state.
@param[out] MainFormState Binary form/widget state after translation.
@retval EFI_SUCCESS Form/widget state ready.
@return Error codes from underlying functions.
**/
STATIC
EFI_STATUS
EFIAPI
PlatformConfigToFormState (
OUT MAIN_FORM_STATE *MainFormState
)
{
EFI_STATUS Status;
PLATFORM_CONFIG PlatformConfig;
UINT64 OptionalElements;
UINTN ModeNumber;
ZeroMem (MainFormState, sizeof *MainFormState);
Status = PlatformConfigLoad (&PlatformConfig, &OptionalElements);
switch (Status) {
case EFI_SUCCESS:
if (OptionalElements & PLATFORM_CONFIG_F_GRAPHICS_RESOLUTION) {
//
// Format the preferred resolution as text.
//
UnicodeSPrintAsciiFormat (
(CHAR16 *) MainFormState->CurrentPreferredResolution,
sizeof MainFormState->CurrentPreferredResolution,
"%Ldx%Ld",
(INT64) PlatformConfig.HorizontalResolution,
(INT64) PlatformConfig.VerticalResolution);
//
// Try to locate it in the drop-down list too. This may not succeed, but
// that's fine.
//
for (ModeNumber = 0; ModeNumber < mNumGopModes; ++ModeNumber) {
if (mGopModes[ModeNumber].X == PlatformConfig.HorizontalResolution &&
mGopModes[ModeNumber].Y == PlatformConfig.VerticalResolution) {
MainFormState->NextPreferredResolution = (UINT32) ModeNumber;
break;
}
}
break;
}
//
// fall through otherwise
//
case EFI_NOT_FOUND:
UnicodeSPrintAsciiFormat (
(CHAR16 *) MainFormState->CurrentPreferredResolution,
sizeof MainFormState->CurrentPreferredResolution,
"Unset");
break;
default:
return Status;
}
return EFI_SUCCESS;
}
/**
This function is called by the HII machinery when it fetches the form state.
@ -142,7 +216,9 @@ STATIC GOP_MODE *mGopModes;
all values filled in for the names in the Request
string.
@return Status codes from gHiiConfigRouting->BlockToConfig().
@retval EFI_SUCCESS Extraction of form state in <MultiConfigAltResp>
encoding successful.
@return Status codes from underlying functions.
**/
STATIC
@ -160,9 +236,15 @@ ExtractConfig (
DEBUG ((EFI_D_VERBOSE, "%a: Request=\"%s\"\n", __FUNCTION__, Request));
StrnCpy ((CHAR16 *) MainFormState.CurrentPreferredResolution,
L"Unset", MAXSIZE_RES_CUR);
MainFormState.NextPreferredResolution = 0;
Status = PlatformConfigToFormState (&MainFormState);
if (EFI_ERROR (Status)) {
*Progress = Request;
return Status;
}
//
// Answer the textual request keying off the binary form state.
//
Status = gHiiConfigRouting->BlockToConfig (gHiiConfigRouting, Request,
(VOID *) &MainFormState, sizeof MainFormState,
Results, Progress);