Added a PCD to turn on/off probing Block IO devices to detect add/remove/change. FAT driver does not do this so if the shell does not do this you will get dir hits on an SD Card that has been removed. Default is ON. I moved this feature from device command to main command loop so it gets done after you type return before your command is processed.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10479 6f19259b-4bc3-4df7-8a09-765794883524

3 files changed, 45 insertions, 21 deletions

diff --git a/EmbeddedPkg/Ebl/Ebl.inf b/EmbeddedPkg/Ebl/Ebl.inf
index bd8b67e552..44bab64b07 100644
--- a/EmbeddedPkg/Ebl/Ebl.inf
+++ b/EmbeddedPkg/Ebl/Ebl.inf
@@ -99,6 +99,7 @@
   gEmbeddedTokenSpaceGuid.PcdEmbeddedIoEnable

   gEmbeddedTokenSpaceGuid.PcdEmbeddedScriptCmd

   gEmbeddedTokenSpaceGuid.PcdEmbeddedPciDebugCmd

+  gEmbeddedTokenSpaceGuid.PcdEmbeddedProbeRemovable

 

 [FixedPcd.common]

   gEmbeddedTokenSpaceGuid.PcdEmbeddedAutomaticBootCommand

diff --git a/EmbeddedPkg/Ebl/EfiDevice.c b/EmbeddedPkg/Ebl/EfiDevice.c
index 354a6d7720..2f9a606726 100644
--- a/EmbeddedPkg/Ebl/EfiDevice.c
+++ b/EmbeddedPkg/Ebl/EfiDevice.c
@@ -210,34 +210,13 @@ EblDeviceCmd (
   UINTN         Index;

   UINTN         CurrentRow;

   UINTN         Max;

-  EFI_OPEN_FILE *File;

 

   CurrentRow = 0;

 

   // Need to call here to make sure Device Counts are valid

   EblUpdateDeviceLists ();

 

-  //

-  // Probe for media insertion/removal in removable media devices

-  //

-  Max = EfiGetDeviceCounts (EfiOpenBlockIo);

-  if (Max != 0) {

-    for (Index = 0; Index < Max; Index++) {

-      File = EfiDeviceOpenByType (EfiOpenBlockIo, Index);

-      if (File != NULL) {

-        if (File->FsBlockIoMedia->RemovableMedia) {

-          // Probe to see if media is present (or not) or media changed

-          //  this causes the ReinstallProtocolInterface() to fire in the

-          //  block io driver to update the system about media change events

-          File->FsBlockIo->ReadBlocks (File->FsBlockIo, File->FsBlockIo->Media->MediaId, (EFI_LBA)0, 0, NULL);

-        }

-        EfiClose (File);

-      }

-    }

-  }

-

   // Now we can print out the info...

-

   Max = EfiGetDeviceCounts (EfiOpenFirmwareVolume);

   if (Max != 0) {

     AsciiPrint ("Firmware Volume Devices:\n");

diff --git a/EmbeddedPkg/Ebl/Main.c b/EmbeddedPkg/Ebl/Main.c
index 6d536fd79c..98097e4be1 100644
--- a/EmbeddedPkg/Ebl/Main.c
+++ b/EmbeddedPkg/Ebl/Main.c
@@ -456,6 +456,45 @@ EblPrintStartupBanner (
 

 

 /**

+  Send null requests to all removable media block IO devices so the a media add/remove/change

+  can be detected in real before we execute a command. 

+

+  This is mainly due to the fact that the FAT driver does not do this today so you can get stale 

+  dir commands after an SD Card has been removed.

+**/

+VOID

+EblProbeRemovableMedia (

+  VOID

+  )

+{

+  UINTN         Index;

+  UINTN         Max;

+  EFI_OPEN_FILE *File;

+

+  //

+  // Probe for media insertion/removal in removable media devices

+  //

+  Max = EfiGetDeviceCounts (EfiOpenBlockIo);

+  if (Max != 0) {

+    for (Index = 0; Index < Max; Index++) {

+      File = EfiDeviceOpenByType (EfiOpenBlockIo, Index);

+      if (File != NULL) {

+        if (File->FsBlockIoMedia->RemovableMedia) {

+          // Probe to see if media is present (or not) or media changed

+          //  this causes the ReinstallProtocolInterface() to fire in the

+          //  block io driver to update the system about media change events

+          File->FsBlockIo->ReadBlocks (File->FsBlockIo, File->FsBlockIo->Media->MediaId, (EFI_LBA)0, 0, NULL);

+        }

+        EfiClose (File);

+      }

+    }

+  }

+}

+

+

+

+

+/**

   Print the prompt for the EBL.

 **/

 VOID

@@ -611,6 +650,11 @@ EdkBootLoaderEntry (
     EblPrompt ();

     GetCmd (CmdLine, MAX_CMD_LINE);

     SetCmdHistory (CmdLine);

+

+    if (FeaturePcdGet (PcdEmbeddedProbeRemovable)) {

+      // Probe removable media devices to see if media has been inserted or removed.

+      EblProbeRemovableMedia ();

+    }

   }

 }