pnor: Fall back to AST mbox transport if IPMI is unavailable

Avoid a flag-day transition by allowing for old BMC releases. Eventually
support for the AST mailbox will be removed and the indirection with it.

Change-Id: Ic62ee6a0f2132583cba290098a52417d32eb772d
Signed-off-by: Andrew Jeffery <andrewrj@au1.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/66122
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/src/usr/pnor/pnorif.H b/src/usr/pnor/pnorif.H
new file mode 100644
index 000000000..598ea2555
--- /dev/null
+++ b/src/usr/pnor/pnorif.H
@@ -0,0 +1,81 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/pnor/pnorif.H $                                       */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2011,2018                        */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* 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.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#ifndef __PNORIF_H
+#define __PNORIF_H
+
+#include <errl/errlentry.H>
+
+class PnorIf
+{
+    public:
+        /**
+         * @brief Performs a PNOR Read Operation
+         *
+         * @parm o_buffer  Buffer to read data into
+         * @parm io_buflen  Input: Number of bytes to read,
+         *       Output: Number of bytes actually read
+         * @parm i_address  Offset into flash to read
+         *
+         * @return Error from operation
+         */
+        virtual errlHndl_t readFlash(void* o_buffer,
+                                     size_t& io_buflen,
+                                     uint64_t i_address) = 0;
+
+        /**
+         * @brief Performs a PNOR Write Operation
+         *
+         * @parm i_buffer  Buffer to write data from
+         * @parm io_buflen  Input: Number of bytes to write,
+         *       Output: Number of bytes actually written
+         * @parm i_address  Offset into flash to write
+         *
+         * @return Error from operation
+         */
+        virtual errlHndl_t writeFlash(const void* i_buffer,
+                                      size_t& io_buflen,
+                                      uint64_t i_address) = 0;
+
+        /**
+         * @brief Retrieve size of NOR flash
+         * @return Size of PNOR in bytes
+         */
+        virtual uint32_t getNorSize(void) = 0;
+
+        /**
+         * @brief Retrieve bitstring of NOR workarounds
+         * @return NOR workarounds (see VendorWorkarounds in norflash.H)
+         */
+        virtual uint32_t getNorWorkarounds(void) = 0;
+
+        /**
+         * @brief Destructor
+         */
+        virtual ~PnorIf(void)
+        {
+        }
+};
+
+#endif