On Fri, Sep 6, 2013 at 2:40 PM, Laszlo Ersek <[email protected]> wrote:
> In preparation for the next patch, collect active UEFI boot options in
> advance into a new array. Rebase the current inner loop (the matching
> loop) to this array.
>
> Contributed-under: TianoCore Contribution Agreement 1.0
>
> Signed-off-by: Laszlo Ersek <[email protected]>
> ---
> OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c | 115
> ++++++++++++++++++++----
> 1 files changed, 97 insertions(+), 18 deletions(-)
>
> diff --git a/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c
> b/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c
> index e9580b9..7139cc2 100644
> --- a/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c
> +++ b/OvmfPkg/Library/PlatformBdsLib/QemuBootOrder.c
> @@ -238,6 +238,15 @@ typedef struct {
>
>
> /**
> + Array element tracking an enumerated boot option that has the
> + LOAD_OPTION_ACTIVE attribute.
> +**/
> +typedef struct {
> + CONST BDS_COMMON_OPTION *BootOption; // reference only, no ownership
> +} ACTIVE_OPTION;
> +
> +
> +/**
>
> Append BootOptionId to BootOrder, reallocating the latter if needed.
>
> @@ -283,6 +292,75 @@ BootOrderAppend (
>
>
> /**
> +
> + Create an array of ACTIVE_OPTION elements for a boot option list.
> +
> + @param[in] BootOptionList A boot option list, created with
> + BdsLibEnumerateAllBootOption().
> +
> + @param[out] ActiveOption Pointer to the first element in the new array.
> + The caller is responsible for freeing the array
> + with FreePool() after use.
> +
> + @param[out] Count Number of elements in the new array.
> +
> +
> + @retval RETURN_SUCCESS The ActiveOption array has been created.
> +
> + @retval RETURN_NOT_FOUND No active entry has been found in
> + BootOptionList.
> +
> + @retval RETURN_OUT_OF_RESOURCES Memory allocation failed.
> +
> +**/
> +STATIC
> +RETURN_STATUS
> +CollectActiveOptions (
> + IN CONST LIST_ENTRY *BootOptionList,
> + OUT ACTIVE_OPTION **ActiveOption,
> + OUT UINTN *Count
> + )
> +{
> + UINTN ScanMode;
> +
GCC 4.7 for IA32 wants to issue a warning unless I set *ActiveOption
to NULL here. Do you see the same?
> + //
> + // Scan the list twice:
> + // - count active entries,
> + // - store links to active entries.
> + //
> + for (ScanMode = 0; ScanMode < 2; ++ScanMode) {
> + CONST LIST_ENTRY *Link;
> +
> + Link = BootOptionList->ForwardLink;
> + *Count = 0;
> + while (Link != BootOptionList) {
> + CONST BDS_COMMON_OPTION *Current;
> +
> + Current = CR (Link, BDS_COMMON_OPTION, Link,
> BDS_LOAD_OPTION_SIGNATURE);
> + if (IS_LOAD_OPTION_TYPE (Current->Attribute, LOAD_OPTION_ACTIVE)) {
> + if (ScanMode == 1) {
> + (*ActiveOption)[*Count].BootOption = Current;
> + }
> + ++*Count;
> + }
> + Link = Link->ForwardLink;
> + }
> +
> + if (ScanMode == 0) {
> + if (*Count == 0) {
> + return RETURN_NOT_FOUND;
> + }
> + *ActiveOption = AllocatePool (*Count * sizeof **ActiveOption);
> + if (*ActiveOption == NULL) {
> + return RETURN_OUT_OF_RESOURCES;
> + }
> + }
> + }
> + return RETURN_SUCCESS;
> +}
> +
> +
> +/**
> OpenFirmware device path node
> **/
> typedef struct {
> @@ -967,6 +1045,8 @@ SetBootOrderFromQemu (
> CONST CHAR8 *FwCfgPtr;
>
> BOOT_ORDER BootOrder;
> + ACTIVE_OPTION *ActiveOption;
> + UINTN ActiveCount;
>
> UINTN TranslatedSize;
> CHAR16 Translated[TRANSLATION_OUTPUT_SIZE];
> @@ -1007,6 +1087,11 @@ SetBootOrderFromQemu (
> goto ErrorFreeFwCfg;
> }
>
> + Status = CollectActiveOptions (BootOptionList, &ActiveOption,
> &ActiveCount);
> + if (RETURN_ERROR (Status)) {
> + goto ErrorFreeBootOrder;
> + }
> +
> //
> // translate each OpenFirmware path
> //
> @@ -1016,38 +1101,29 @@ SetBootOrderFromQemu (
> Status == RETURN_UNSUPPORTED ||
> Status == RETURN_BUFFER_TOO_SMALL) {
> if (Status == RETURN_SUCCESS) {
> - CONST LIST_ENTRY *Link;
> + UINTN Idx;
>
> //
> - // match translated OpenFirmware path against all enumerated boot
> options
> + // match translated OpenFirmware path against all active boot options
> //
> - for (Link = BootOptionList->ForwardLink; Link != BootOptionList;
> - Link = Link->ForwardLink) {
> - CONST BDS_COMMON_OPTION *BootOption;
> -
> - BootOption = CR (
> - Link,
> - BDS_COMMON_OPTION,
> - Link,
> - BDS_LOAD_OPTION_SIGNATURE
> - );
> - if (IS_LOAD_OPTION_TYPE (BootOption->Attribute, LOAD_OPTION_ACTIVE)
> &&
> - Match (
> + for (Idx = 0; Idx < ActiveCount; ++Idx) {
> + if (Match (
> Translated,
> TranslatedSize, // contains length, not size, in CHAR16's here
> - BootOption->DevicePath
> + ActiveOption[Idx].BootOption->DevicePath
> )
> ) {
> //
> // match found, store ID and continue with next OpenFirmware path
> //
> - Status = BootOrderAppend (&BootOrder, BootOption->BootCurrent);
> + Status = BootOrderAppend (&BootOrder,
> + ActiveOption[Idx].BootOption->BootCurrent);
> if (Status != RETURN_SUCCESS) {
> - goto ErrorFreeBootOrder;
> + goto ErrorFreeActiveOption;
> }
> break;
> }
> - } // scanned all enumerated boot options
> + } // scanned all active boot options
> } // translation successful
>
> TranslatedSize = sizeof (Translated) / sizeof (Translated[0]);
> @@ -1077,6 +1153,9 @@ SetBootOrderFromQemu (
> ));
> }
>
> +ErrorFreeActiveOption:
> + FreePool (ActiveOption);
> +
> ErrorFreeBootOrder:
> FreePool (BootOrder.Data);
>
> --
> 1.7.1
>
>
>
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