1 files changed, 95 insertions, 0 deletions
diff --git a/src/include/kernel/memstate.H b/src/include/kernel/memstate.H
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+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/include/kernel/misc.H $                                   */
+/*                                                                        */
+/* IBM CONFIDENTIAL                                                       */
+/*                                                                        */
+/* COPYRIGHT International Business Machines Corp. 2011,2013              */
+/*                                                                        */
+/* p1                                                                     */
+/*                                                                        */
+/* Object Code Only (OCO) source materials                                */
+/* Licensed Internal Code Source Materials                                */
+/* IBM HostBoot Licensed Internal Code                                    */
+/*                                                                        */
+/* The source code for this program is not published or otherwise         */
+/* divested of its trade secrets, irrespective of what has been           */
+/* deposited with the U.S. Copyright Office.                              */
+/*                                                                        */
+/* Origin: 30                                                             */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+/** @file misc.H
+ *  @brief Misc. Kernel functions and utilities.
+ */
+
+#ifndef __KERNEL_MEMSTATE_H
+#define __KERNEL_MEMSTATE_H
+
+namespace KernelMemState
+{
+    // hb_Mem_Location struct values are defined below.
+    /* Core Scratch 6 (Scom 0x10013289) will be used to indicate the memory
+     state
+
+     Register Bit Definition:
+     - 0:7 - Indicator of memory mode
+     NOTE:  having no bits on in this range indicated the memory is not ready.
+     - - 0b00000000 = Hostboot contained in L3
+     - - 0b00000001 = Hostboot expanded to mainstore
+     - 8:31 - Reserved/Unused
+     - 32:63 - Size of active Hostboot memory in MB
+     - - 0 = Hostboot is not ready yet.
+     - - 4 = Hostboot is using half a cache
+     - - 8 = Hostboot is using the full cache
+     - - 32 = Hostboot is using 32 MB of mainstore*/
+
+
+    enum MemLocation
+    {
+          MEM_CONTAINED_NR  = 0x0,
+          MEM_CONTAINED_L3  = 0x80,
+          MEM_CONTAINED_MS  = 0x40,
+    };
+
+    enum MemSize
+    {
+          NO_MEM          =  0x0,
+          HALF_CACHE      =  0x00000004,
+          FULL_CACHE      =  0x00000008,
+          MS_32MEG        =  0x00000020,
+          PRE_SECURE_BOOT =  0x000000FF,
+    };
+
+    struct mem_location
+    {
+
+        union{
+            struct {
+                uint64_t memMode:8;     /**< indicator of memory mode HostBoot
+                                             contained in l3 or mainstore  */
+
+                uint64_t reserved:24;   /**< reserved */
+                uint64_t memSize:32;    /**< Size of the memory */
+            };
+            uint64_t Scratch6Data;      /**< Full double word */
+        }; 
+   };
+
+    /** @fn set
+     *
+     *  @brief Sets the Hostboot memory location and size in the scratch
+     *     register 6
+     *
+     *  This is used to update the core scratch reg 6 with the current
+     *  location of hostboot memory and the size it is.
+     *
+     *  @param[in] uint16_t - location of the memory (L3 or Mainstore)
+     *  @param[in] uint32_t - size of the memory
+     */
+    void setMemScratchReg(MemLocation i_location,MemSize i_size);
+
+};
+
+#endif