vpnor: create hostboot bootloader partition

The hostboot bootloader code doesn't use mbox.

It has specific requirements:
- The PNOR TOC should be at the 'PNOR end - TOC size - page size'
  offset. It searches for the TOC here, if not found, the search moves
  down page by page.
- The PNOR should be 64M. The page size and erase block should be 4K.
  The TOC should be 32K.

Copy what the bootloader expects to the LPC memory when mboxd starts up.
The same needs to be done in the case of an mbox reset (irrespective of
where the reset comes from).

Skiboot expects that the TOC should be at offset 0, but it uses mbox to
read the TOC. So this commit doesn't impact skiboot requirements.

Change-Id: I7de556dccfea85f2faa5f401177006a3a562494e
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/mboxd_lpc_virtual.cpp b/mboxd_lpc_virtual.cpp
new file mode 100644
index 0000000..802c761
--- /dev/null
+++ b/mboxd_lpc_virtual.cpp
@@ -0,0 +1,34 @@
+/*
+ * Mailbox Daemon LPC Helpers
+ *
+ * Copyright 2017 IBM
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include "mbox.h"
+#include "mboxd_lpc.h"
+#include "mboxd_pnor_partition_table.h"
+
+/*
+ * reset_lpc() - Reset the lpc bus mapping
+ * @context:     The mbox context pointer
+ *
+ * Return        0 on success otherwise negative error code
+ */
+int reset_lpc(struct mbox_context *context)
+{
+    vpnor_copy_bootloader_partition(context);
+    return point_to_memory(context);
+}