diff options
| -rw-r--r-- | OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c index 54f859de9f..a577aea556 100644 --- a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c +++ b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c @@ -114,9 +114,17 @@ QemuFlashDetected ( DEBUG ((DEBUG_INFO, "QemuFlashDetected => FD behaves as RAM\n"));
*Ptr = OriginalUint8;
} else if (ProbeUint8 == CLEARED_ARRAY_STATUS) {
- DEBUG ((DEBUG_INFO, "QemuFlashDetected => FD behaves as FLASH\n"));
- FlashDetected = TRUE;
- *Ptr = READ_ARRAY_CMD;
+ *Ptr = WRITE_BYTE_CMD;
+ *Ptr = OriginalUint8;
+ *Ptr = READ_STATUS_CMD;
+ ProbeUint8 = *Ptr;
+ *Ptr = READ_ARRAY_CMD;
+ if (ProbeUint8 & 0x10 /* programming error */) {
+ DEBUG ((DEBUG_INFO, "QemuFlashDetected => FD behaves as FLASH, write-protected\n"));
+ } else {
+ DEBUG ((DEBUG_INFO, "QemuFlashDetected => FD behaves as FLASH, writable\n"));
+ FlashDetected = TRUE;
+ }
}
}
|