OvmfPkg/RiscVVirt: Add PlatformBootManagerLib library

[mirror_edk2.git] / OvmfPkg / RiscVVirt / Library / PlatformBootManagerLib / QemuKernel.c

diff --git a/OvmfPkg/RiscVVirt/Library/PlatformBootManagerLib/QemuKernel.c b/OvmfPkg/RiscVVirt/Library/PlatformBootManagerLib/QemuKernel.c
new file mode 100644 (file)
index 0000000..7366281
--- /dev/null
+++ b/OvmfPkg/RiscVVirt/Library/PlatformBootManagerLib/QemuKernel.c
@@ -0,0 +1,77 @@
+/** @file\r
+  Try to load an EFI-stubbed RISC-V Linux kernel from QEMU's fw_cfg.\r
+\r
+  This implementation differs from OvmfPkg/Library/LoadLinuxLib. An EFI\r
+  stub in the subject kernel is a hard requirement here.\r
+\r
+  Copyright (C) 2014-2016, Red Hat, Inc.\r
+\r
+  SPDX-License-Identifier: BSD-2-Clause-Patent\r
+**/\r
+\r
+#include <Library/QemuLoadImageLib.h>\r
+#include <Library/ReportStatusCodeLib.h>\r
+\r
+#include "PlatformBm.h"\r
+\r
+//\r
+// The entry point of the feature.\r
+//\r
+\r
+/**\r
+  Download the kernel, the initial ramdisk, and the kernel command line from\r
+  QEMU's fw_cfg. Construct a minimal SimpleFileSystem that contains the two\r
+  image files, and load and start the kernel from it.\r
+\r
+  The kernel will be instructed via its command line to load the initrd from\r
+  the same Simple FileSystem.\r
+\r
+  @retval EFI_NOT_FOUND         Kernel image was not found.\r
+  @retval EFI_OUT_OF_RESOURCES  Memory allocation failed.\r
+  @retval EFI_PROTOCOL_ERROR    Unterminated kernel command line.\r
+\r
+  @return                       Error codes from any of the underlying\r
+                                functions. On success, the function doesn't\r
+                                return.\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+TryRunningQemuKernel (\r
+  VOID\r
+  )\r
+{\r
+  EFI_STATUS  Status;\r
+  EFI_HANDLE  KernelImageHandle;\r
+\r
+  Status = QemuLoadKernelImage (&KernelImageHandle);\r
+  if (EFI_ERROR (Status)) {\r
+    return Status;\r
+  }\r
+\r
+  //\r
+  // Signal the EFI_EVENT_GROUP_READY_TO_BOOT event.\r
+  //\r
+  EfiSignalEventReadyToBoot ();\r
+\r
+  REPORT_STATUS_CODE (\r
+    EFI_PROGRESS_CODE,\r
+    (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_DXE_BS_PC_READY_TO_BOOT_EVENT)\r
+    );\r
+\r
+  //\r
+  // Start the image.\r
+  //\r
+  Status = QemuStartKernelImage (&KernelImageHandle);\r
+  if (EFI_ERROR (Status)) {\r
+    DEBUG ((\r
+      DEBUG_ERROR,\r
+      "%a: QemuStartKernelImage(): %r\n",\r
+      __FUNCTION__,\r
+      Status\r
+      ));\r
+  }\r
+\r
+  QemuUnloadKernelImage (KernelImageHandle);\r
+\r
+  return Status;\r
+}\r