dev: Add ATA command used in recent Linux kernels

Add a case for the ATA command ATAPI_IDENTIFY_DEVICE.
This avoids the panic: Unsupported ATA command when booting a recent Linux
kernel. This was tested on 4.8.13.

Change-Id: Ib297a2c02da0730d8698c59801254dd0f5ee9f7f
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/2863
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Gabe Black <gabeblack@google.com>

diff --git a/src/dev/storage/ide_disk.cc b/src/dev/storage/ide_disk.cc
index e4b4e625a68617fc60a09243f5ab38395dbb5f7a..de0986e458d9eebb892a712c80d87559e2c1c7aa 100644 (file)
--- a/src/dev/storage/ide_disk.cc
+++ b/src/dev/storage/ide_disk.cc
@@ -657,6 +657,7 @@ IdeDisk::startCommand()
 
         // Supported PIO data-in commands
       case WDCC_IDENTIFY:
+      case ATAPI_IDENTIFY_DEVICE:
         cmdBytes = cmdBytesLeft = sizeof(struct ataparams);
         devState = Prepare_Data_In;
         action = ACT_DATA_READY;
@@ -852,7 +853,8 @@ IdeDisk::updateState(DevAction_t action)
             status |= STATUS_DRQ_BIT;
 
             // copy the data into the data buffer
-            if (cmdReg.command == WDCC_IDENTIFY) {
+            if (cmdReg.command == WDCC_IDENTIFY ||
+                cmdReg.command == ATAPI_IDENTIFY_DEVICE) {
                 // Reset the drqBytes for this block
                 drqBytesLeft = sizeof(struct ataparams);