Virtual File System module load and unload

Change-Id: Iaa6a256a8a15ac48bfba5bc1cab292c5ac246166
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/253
Tested-by: Jenkins Server
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

2 files changed, 44 insertions, 4 deletions

diff --git a/src/include/sys/mm.h b/src/include/sys/mm.h
index 4719ff7df..71e41d24c 100644
--- a/src/include/sys/mm.h
+++ b/src/include/sys/mm.h
@@ -2,6 +2,7 @@
 #define __SYS_MM_H
 
 #include <stdint.h>
+#include <limits.h>
 #include <sys/msg.h>
 
 #ifdef __cplusplus
@@ -24,4 +25,13 @@ int mm_alloc_block(msg_q_t mq,void* va,uint64_t size);
 }
 #endif
 
+/** @fs mm_icache_invalidate()
+ *  @brief Invalidate the ICACHE for the given memory
+ *
+ *  @param[in] i_addr - Destination address
+ *  @param[in] i_cpu_word_count - number of CPU_WORDs (uint64_t)
+ */
+void mm_icache_invalidate(void * i_addr, size_t i_cpu_word_count);
+
+
 #endif
diff --git a/src/include/sys/vfs.h b/src/include/sys/vfs.h
index 5c28e29b8..27337f469 100644
--- a/src/include/sys/vfs.h
+++ b/src/include/sys/vfs.h
@@ -2,12 +2,20 @@
 #define __SYS_VFS_H
 
 #include <stdint.h>
+// NOTE!. This file is included by linker.C and can't include non standard header files
+#ifndef LINKER_C
+// other includes not visable to the linker
+#include <sys/task.h>
+#endif
 
 // make TODO VFS_MODULE_MAX equal to the actual number of modules in the base image (+ 2?)
 #define VFS_MODULE_MAX 64
 // Extended use 4 4k pages
+//  Extended Module Virtual address at 1GB
+#define VFS_EXTENDED_MODULE_VADDR (1 * 1024 * 1024 * 1024)
+#define VFS_EXTENDED_MODULE_TABLE_ADDRESS (VFS_EXTENDED_MODULE_VADDR)
+#define VFS_EXTENDED_MODULE_TABLE_OFFSET 0
 #define VFS_EXTENDED_MODULE_MAX 128
-#define VFS_EXTENDED_MODULE_TABLE_ADDRESS 0x0000000040000000UL
 #define VFS_MODULE_NAME_MAX 64
 #define VFS_SYMBOL_INIT _init
 #define VFS_SYMBOL_START _start
@@ -32,12 +40,15 @@ extern const char* VFS_ROOT;
 extern const char* VFS_ROOT_BIN;
 extern const char* VFS_ROOT_DATA;
 extern const char* VFS_ROOT_MSG;
+extern const char* VFS_MSG;
 
 enum VfsMessages
 {
-    VFS_MSG_REGISTER_MSGQ,
-    VFS_MSG_RESOLVE_MSGQ,
-    VFS_MSG_EXEC,
+    VFS_MSG_REGISTER_MSGQ, //!< Message to VFS_ROOT to register a message queue
+    VFS_MSG_RESOLVE_MSGQ,  //!< Message to VFS_ROOT to find a message queue
+    VFS_MSG_EXEC,          //!< Message to VFS_ROOT execute a module
+    VFS_MSG_LOAD,          //!< Message to VFS_MSG to load a module
+    VFS_MSG_UNLOAD,        //!< Message to VFS_MSG to unload a module
 };
 
 struct VfsSystemModule
@@ -52,10 +63,29 @@ struct VfsSystemModule
 };
 
 extern VfsSystemModule VFS_MODULES[VFS_MODULE_MAX];
+
 extern uint64_t VFS_LAST_ADDRESS;
 
 #ifdef __cplusplus
 }
 #endif
 
+#ifndef LINKER_C
+/**
+ * Find the VfsSystemModule data for the given module name
+ * @param[in] i_table VFS module table
+ * @param[in] i_name name of module to find
+ * @return VfsSystemModule ptr to data | NULL if not found
+ */
+VfsSystemModule * vfs_find_module(VfsSystemModule * i_table, const char * i_name);
+
+/**
+ * Call the module start routine
+ * @param[in] i_module VfsSystemModule data for the module
+ * @param[in] i_param parameter to pass to task_create() for this module
+ * @return tid_t of started task | -1 if i_module is NULL | -2 if there is no start()
+ */
+tid_t vfs_exec(VfsSystemModule * i_module, void* i_param);
+#endif
+
 #endif