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authordgilbert <dgilbert@us.ibm.com>2011-07-28 16:42:28 -0500
committerDouglas R. Gilbert <dgilbert@us.ibm.com>2011-08-17 14:22:39 -0500
commitc56648379cde6ea3bcfac07923bb560734c6e16f (patch)
tree81ee3d5abaa130d0f1e36e038c3a344e11f55ce0 /src/usr
parent20b03fdaeb7414fdf9d43634976ca1ab5fbac7f1 (diff)
downloadtalos-hostboot-c56648379cde6ea3bcfac07923bb560734c6e16f.tar.gz
talos-hostboot-c56648379cde6ea3bcfac07923bb560734c6e16f.zip
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>
Diffstat (limited to 'src/usr')
-rw-r--r--src/usr/cxxtest/cxxtestexec.C2
-rw-r--r--src/usr/initservice/baseinitsvc/initservice.C104
-rw-r--r--src/usr/initservice/baseinitsvc/initsvctasks.H21
-rw-r--r--src/usr/initservice/common/initsvcstructs.H12
-rw-r--r--src/usr/initservice/extinitsvc/extinitsvc.C21
-rw-r--r--src/usr/initservice/extinitsvc/extinitsvctasks.H7
-rw-r--r--src/usr/makefile4
-rw-r--r--src/usr/vfs/makefile8
-rw-r--r--src/usr/vfs/vfsrp.C317
-rw-r--r--src/usr/vfs/vfsrp.H90
10 files changed, 530 insertions, 56 deletions
diff --git a/src/usr/cxxtest/cxxtestexec.C b/src/usr/cxxtest/cxxtestexec.C
index 5470b718a..645858c95 100644
--- a/src/usr/cxxtest/cxxtestexec.C
+++ b/src/usr/cxxtest/cxxtestexec.C
@@ -56,6 +56,8 @@ TRAC_INIT(&g_trac_cxxtest, "CXXTEST", 1024 );
extern "C"
void _start(void *io_pArgs)
{
+ // TODO These modules will eventually all be in the extended binary.
+ // VfsSystemModule* vfsItr = (VfsSystemModule*) VFS_EXTENDED_MODULE_TABLE_ADDRESS;
VfsSystemModule* vfsItr = &VFS_MODULES[0];
tid_t tidrc = 0;
uint64_t totalmodules = 0;
diff --git a/src/usr/initservice/baseinitsvc/initservice.C b/src/usr/initservice/baseinitsvc/initservice.C
index dc8380f19..55e395c49 100644
--- a/src/usr/initservice/baseinitsvc/initservice.C
+++ b/src/usr/initservice/baseinitsvc/initservice.C
@@ -25,6 +25,7 @@
#include <kernel/console.H>
#include <sys/vfs.h>
+#include <vfs/vfs.H>
#include <sys/task.h>
#include <trace/interface.H>
#include <errl/errlentry.H>
@@ -77,54 +78,66 @@ errlHndl_t InitService::startTask( const TaskInfo *i_ptask,
assert(i_ptask->taskflags.task_type == START_TASK);
- tidrc = task_exec( i_ptask->taskname, io_pargs ); // launch the child
- if ( static_cast<int16_t>(tidrc) < 0 )
+ // Base modules have already been loaded and initialized,
+ // extended modules have not.
+ if(i_ptask->taskflags.module_type == EXT_IMAGE)
{
- // task failed to launch, post an errorlog and dump some trace
- /*@ errorlog tag
- * @errortype ERRL_SEV_CRITICAL_SYS_TERM
- * @moduleid see task list
- * @reasoncode START_TASK_FAILED
- * @userdata1 task id or task return code
- * @userdata2 0
- *
- * @devdesc Initialization Service failed to start a task.
- * The module id will identify the task.
- *
- */
- lo_errl = new ERRORLOG::ErrlEntry(
- ERRORLOG::ERRL_SEV_CRITICAL_SYS_TERM, // severity
- i_ptask->taskflags.module_id, // moduleid
- INITSERVICE::START_TASK_FAILED, // reason Code
- tidrc, // user1 = tidrc
- 0
- );
- TRACDBIN( g_trac_initsvc,
- "ERROR starting task:",
- i_ptask->taskname,
- strlen(i_ptask->taskname) );
- TRACDCOMP( g_trac_initsvc,
- "tidrc=%d, errlog p = %p" ,
- (int16_t)tidrc, lo_errl );
+ // load module and call _init()
+ lo_errl = VFS::module_load( i_ptask->taskname );
+ }
- } // endif tidrc
- else
+ if( !lo_errl)
{
- // task launched OK.
- TRACDBIN( g_trac_initsvc,
- "Task finished OK :",
- i_ptask->taskname,
- strlen(i_ptask->taskname) );
- TRACDCOMP( g_trac_initsvc,
- "task number %d, errlog p = %p",
- tidrc, lo_errl );
+ tidrc = task_exec( i_ptask->taskname, io_pargs ); // launch the child
- if ( io_pargs )
+ if ( static_cast<int16_t>(tidrc) < 0 )
{
- io_pargs->waitParentSync(); // sync up childtask
- }
+ // task failed to launch, post an errorlog and dump some trace
+ /*@ errorlog tag
+ * @errortype ERRL_SEV_CRITICAL_SYS_TERM
+ * @moduleid see task list
+ * @reasoncode START_TASK_FAILED
+ * @userdata1 task id or task return code
+ * @userdata2 0
+ *
+ * @devdesc Initialization Service failed to start a task.
+ * The module id will identify the task.
+ *
+ */
+ lo_errl = new ERRORLOG::ErrlEntry(
+ ERRORLOG::ERRL_SEV_CRITICAL_SYS_TERM, // severity
+ i_ptask->taskflags.module_id, // moduleid
+ INITSERVICE::START_TASK_FAILED, // reason Code
+ tidrc, // user1 = tidrc
+ 0
+ );
+ TRACDBIN( g_trac_initsvc,
+ "ERROR starting task:",
+ i_ptask->taskname,
+ strlen(i_ptask->taskname) );
+ TRACDCOMP( g_trac_initsvc,
+ "tidrc=%d, errlog p = %p" ,
+ (int16_t)tidrc, lo_errl );
+
+ } // endif tidrc
+ else
+ {
+ // task launched OK.
+ TRACDBIN( g_trac_initsvc,
+ "Task finished OK :",
+ i_ptask->taskname,
+ strlen(i_ptask->taskname) );
+ TRACDCOMP( g_trac_initsvc,
+ "task number %d, errlog p = %p",
+ tidrc, lo_errl );
+ if ( io_pargs )
+ {
+ io_pargs->waitParentSync(); // sync up childtask
+ }
+ }
}
+ // else module load failed. have error log
return lo_errl;
}
@@ -315,6 +328,15 @@ void InitService::init( void *i_ptr )
"task_type==BARRIER" );
// $$TODO
break;
+
+ case UNINIT_TASK:
+ TRACDBIN( g_trac_initsvc,
+ "task_type=UNINIT_TASK : ",
+ ptask->taskname,
+ strlen(ptask->taskname) );
+ errl = VFS::module_unload( ptask->taskname );
+ break;
+
default:
TRACDCOMP( g_trac_initsvc,
"Invalid task_type %d: ",
diff --git a/src/usr/initservice/baseinitsvc/initsvctasks.H b/src/usr/initservice/baseinitsvc/initsvctasks.H
index bf9c925f4..297386ab7 100644
--- a/src/usr/initservice/baseinitsvc/initsvctasks.H
+++ b/src/usr/initservice/baseinitsvc/initsvctasks.H
@@ -61,18 +61,31 @@ const TaskInfo g_taskinfolist[] = {
}
},
+ /**
+ * @brief Extended VFS module
+ */
+ {
+ "libvfs.so", // taskname
+ NULL,
+ {
+ START_TASK, // start task
+ BASE_IMAGE, // Base Module
+ START_VFS_ERRL_ID, // module id for error log
+ }
+ },
+
// ----- Extended Image -----------------------------------------------------
/**
* @brief extinitsvc, initializes extended module area
*/
{
- "libextinitsvc.so" , // taskname
+ "libextinitsvc.so" , // taskname
NULL, // no pointer to fn
{
- START_TASK, // don't start
- EXT_IMAGE, // Ext Module
- START_EXTINITSVC_ERRL_ID, // module id for errorlog
+ START_TASK, // call start()
+ BASE_IMAGE, // TODO EXT_IMAGE
+ START_EXTINITSVC_ERRL_ID, // module id for errorlog
}
},
diff --git a/src/usr/initservice/common/initsvcstructs.H b/src/usr/initservice/common/initsvcstructs.H
index f78c093b8..9d169c676 100644
--- a/src/usr/initservice/common/initsvcstructs.H
+++ b/src/usr/initservice/common/initsvcstructs.H
@@ -43,21 +43,25 @@ namespace INITSERVICE
/**
* @enum TaskType
* - NONE == placeholder, no task
- * - START_TASK == task with _start() function entry point
+ * - INIT_TASK == load and initialize task, but task has no _start()
+ * (extended image only)
+ * - START_TASK == BASE_IMAGE: call _start() function entry point
+ * EXT_IMAGE: call _init(), then _start()
* - START_FN == task with function pointer entry point
* - BARRIER == set barrier for next N tasks.
- * - STOP_TASK == Execute the destructor on the task in extended image.
- * ( not implemented yet)
+ * - UNINIT_TASK == call _fini() to call static destructor(s) on the task.
+ * (extended image only)
* - END_TASK_LIST == last entry in the task list.
*/
enum TaskType
{
UNDEFINED_TT = 0,
NONE,
+ INIT_TASK,
START_TASK,
START_FN,
BARRIER,
- STOP_TASK,
+ UNINIT_TASK,
END_TASK_LIST,
};
diff --git a/src/usr/initservice/extinitsvc/extinitsvc.C b/src/usr/initservice/extinitsvc/extinitsvc.C
index db1baef50..1b5612645 100644
--- a/src/usr/initservice/extinitsvc/extinitsvc.C
+++ b/src/usr/initservice/extinitsvc/extinitsvc.C
@@ -24,7 +24,7 @@
*/
#include <kernel/console.H>
-#include <sys/vfs.h>
+#include <vfs/vfs.H>
#include <sys/task.h>
#include <sys/sync.h>
#include <sys/misc.h>
@@ -132,7 +132,15 @@ void ExtInitSvc::init( void *i_ptr )
ptask->taskname,
strlen(ptask->taskname) );
break;
- case START_TASK:
+ case INIT_TASK:
+ TRACDBIN( g_trac_initsvc,
+ "task_type==INIT_TASK : ",
+ ptask->taskname,
+ strlen(ptask->taskname) );
+ errl = VFS::module_load( ptask->taskname );
+ break;
+
+ case START_TASK: // call _init(), _start(), stay resident
TRACDBIN( g_trac_initsvc,
"task_type=START_TASK : ",
ptask->taskname,
@@ -140,6 +148,7 @@ void ExtInitSvc::init( void *i_ptr )
errl = InitService::getTheInstance().startTask( ptask,
&args );
break;
+
case START_FN:
TRACDCOMP( g_trac_initsvc,
"task_type==START_FN : %p",
@@ -154,6 +163,14 @@ void ExtInitSvc::init( void *i_ptr )
// $$TODO
break;
+ case UNINIT_TASK:
+ TRACDBIN( g_trac_initsvc,
+ "task_type=UNINIT_TASK : ",
+ ptask->taskname,
+ strlen(ptask->taskname) );
+ errl = VFS::module_unload( ptask->taskname );
+ break;
+
default:
TRACDCOMP( g_trac_initsvc,
"Invalid task_type: %d",
diff --git a/src/usr/initservice/extinitsvc/extinitsvctasks.H b/src/usr/initservice/extinitsvc/extinitsvctasks.H
index 9c31bc81d..d65abb914 100644
--- a/src/usr/initservice/extinitsvc/extinitsvctasks.H
+++ b/src/usr/initservice/extinitsvc/extinitsvctasks.H
@@ -30,6 +30,7 @@
namespace INITSERVICE
{
+ // TODO all these will eventuall be in BASE_IMAGE instead of BASE_IMAGE
const uint64_t MAX_EXT_TASKS = 25;
@@ -45,7 +46,7 @@ const TaskInfo g_exttaskinfolist[] = {
NULL, // no pointer to fn
{
START_TASK, // task type
- EXT_IMAGE, // Extended Module
+ BASE_IMAGE, // Extended Module
START_TARGETING_ERRL_ID, // module id
}
},
@@ -58,7 +59,7 @@ const TaskInfo g_exttaskinfolist[] = {
NULL, // no pointer to fn
{
START_TASK, // task type
- EXT_IMAGE, // Extended Module
+ BASE_IMAGE, // Extended Module
EXECUTE_ISTEPS_ERRL_ID, // module id
}
},
@@ -89,7 +90,7 @@ const TaskInfo CXXTEST_TASK = {
NULL, // no pointer to fn
{
START_TASK, // task type
- EXT_IMAGE, // Extended Module
+ BASE_IMAGE, // Extended Module
START_CXXTEST_ERRL_ID, // module id
}
};
diff --git a/src/usr/makefile b/src/usr/makefile
index dc1bffa15..25bf96d4d 100644
--- a/src/usr/makefile
+++ b/src/usr/makefile
@@ -3,7 +3,7 @@ ROOTPATH = ../..
OBJS = module_init.o
SUBDIRS = example.d trace.d cxxtest.d testcore.d errl.d devicefw.d \
- scom.d xscom.d targeting.d initservice.d hwpf.d \
- ecmddatabuffer.d isteps.d pnor.d i2c.d
+ scom.d xscom.d targeting.d initservice.d hwpf.d \
+ ecmddatabuffer.d isteps.d pnor.d vfs.d i2c.d
include ${ROOTPATH}/config.mk
diff --git a/src/usr/vfs/makefile b/src/usr/vfs/makefile
new file mode 100644
index 000000000..2212d9d4f
--- /dev/null
+++ b/src/usr/vfs/makefile
@@ -0,0 +1,8 @@
+ROOTPATH = ../../..
+MODULE = vfs
+
+OBJS = vfsrp.o
+
+#SUBDIRS = test.d
+
+include ${ROOTPATH}/config.mk
diff --git a/src/usr/vfs/vfsrp.C b/src/usr/vfs/vfsrp.C
new file mode 100644
index 000000000..04e90ecc0
--- /dev/null
+++ b/src/usr/vfs/vfsrp.C
@@ -0,0 +1,317 @@
+/**
+ * @file vfsrp.C
+ * @brief Virtual File system Extended image support
+ */
+
+#include <limits.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/msg.h>
+#include <sys/vfs.h>
+#include <vfs/vfs.H>
+#include <vfs/vfs_reasoncodes.H>
+#include <sys/task.h>
+#include <sys/mm.h>
+#include <initservice/taskargs.H>
+#include <trace/interface.H>
+#include "vfsrp.H"
+#include <pnor/pnorif.H>
+#include <util/align.H>
+
+using namespace VFS;
+
+// Trace definitions
+trace_desc_t * g_trac_vfs = NULL;
+TRAC_INIT(&g_trac_vfs, VFS_COMP_NAME, 1024);
+
+/**
+ * setup _start and handle barrier
+ */
+TASK_ENTRY_MACRO( VfsRp::init );
+
+// ----------------------------------------------------------------------------
+
+VfsRp::~VfsRp()
+{
+ // Unloading of this module currently not supported.
+ // unregister msg queue? Currently can't do that
+ // msg_q_destroy(iv_msgQ);
+}
+
+// ----------------------------------------------------------------------------
+
+/**
+ * STATIC initializer of vfs resource provider entry point
+ */
+void VfsRp::init( void * i_taskArgs )
+{
+ errlHndl_t err = NULL;
+ err = Singleton<VfsRp>::instance()._init();
+ INITSERVICE::TaskArgs::TaskArgs* args = (INITSERVICE::TaskArgs::TaskArgs*)i_taskArgs;
+ if(err)
+ {
+ args->postErrorLog(err);
+ }
+}
+
+// ----------------------------------------------------------------------------
+
+/**
+ * Helper function to start vfs messge handler
+ */
+void VfsRp::msg_handler(void * unused)
+{
+ Singleton<VfsRp>::instance().msgHandler();
+}
+
+// ----------------------------------------------------------------------------
+
+void VfsRp::load_unload(void * i_msg)
+{
+ Singleton<VfsRp>::instance()._load_unload((msg_t*)i_msg);
+ task_end();
+}
+
+// ----------------------------------------------------------------------------
+
+void VfsRp::exec(void * i_msg)
+{
+ Singleton<VfsRp>::instance()._exec((msg_t*)i_msg);
+ task_end();
+}
+
+// ----------------------------------------------------------------------------
+
+/**
+ * Initialze the vfs resource provider
+ */
+errlHndl_t VfsRp::_init()
+{
+ errlHndl_t err = NULL;
+ size_t rc = 0;
+ iv_msgQ = msg_q_create();
+ rc = msg_q_register(iv_msgQ, VFS_MSG);
+
+ // Discover PNOR virtual address of extended image
+ PNOR::SectionInfo_t l_pnor_info;
+
+ // How will SIDE eventually be determined? TODO
+ err = PNOR::getSectionInfo(PNOR::HB_EXT_CODE, PNOR::SIDE_A, l_pnor_info);
+ if(!err)
+ {
+ iv_pnor_vaddr = l_pnor_info.vaddr;
+
+ rc = mm_alloc_block
+ (iv_msgQ,
+ (void *)VFS_EXTENDED_MODULE_VADDR,
+ ALIGN_PAGE(l_pnor_info.size)
+ );
+ if(rc == 0)
+ {
+ // Start msg_handler
+ // NOTE: This would be a weak consistancy issues if
+ // task_create were not a system call.
+ task_create(VfsRp::msg_handler, NULL);
+ }
+ else
+ {
+ err = new ERRORLOG::ErrlEntry
+ (
+ ERRORLOG::ERRL_SEV_CRITICAL_SYS_TERM, // severity
+ VFS::VFS_MODULE_ID, // moduleid
+ VFS::VFS_ALLOC_VMEM_FAILED, // reason Code
+ rc, // user1 = rc
+ 0 // user2
+ );
+ }
+ }
+
+ return err;
+}
+
+
+// ----------------------------------------------------------------------------
+
+void VfsRp::msgHandler()
+{
+ while(1)
+ {
+ msg_t* msg = msg_wait(iv_msgQ);
+
+ switch(msg->type)
+ {
+ case VFS_MSG_LOAD:
+ {
+ TRACDBIN(g_trac_vfs, "INFO: load module ",
+ (const char *) msg->data[0],
+ strlen((const char *) msg->data[0]));
+
+ // run in own task so page faults can be handled
+ task_create(load_unload, msg);
+ }
+ break;
+
+ case VFS_MSG_UNLOAD:
+ {
+ TRACDBIN(g_trac_vfs, "INFO: unload module ",
+ (const char *) msg->data[0],
+ strlen((const char *) msg->data[0]));
+
+ // run in own task so page faults can be handled
+ task_create(load_unload, msg);
+
+ }
+ break;
+
+ case VFS_MSG_EXEC:
+ {
+ msg_t * msg1 = (msg_t *) msg->data[0];
+ TRACDCOMP(g_trac_vfs, "VFS: Got exec request of %s",
+ (const char*)msg1->data[0]);
+
+ // run in own task so page faults can be handled
+ task_create(exec, msg);
+
+ }
+ break;
+
+ case MSG_MM_RP_READ:
+ {
+ uint64_t vaddr = msg->data[0];
+ uint64_t paddr = msg->data[1]; //page aligned
+
+ vaddr -= vaddr % PAGE_SIZE;
+ vaddr -= VFS_EXTENDED_MODULE_VADDR;
+ memcpy((void *)paddr, (void *)(iv_pnor_vaddr+vaddr),
+ PAGE_SIZE);
+
+ mm_icache_invalidate((void*)paddr,PAGE_SIZE/8);
+
+ }
+ msg->data[1] = 0;
+ msg_respond(iv_msgQ, msg);
+ break;
+
+ case MSG_MM_RP_WRITE:
+ assert(0); // not supported now
+ //msg->data[1] = 0;
+ //msg_respond(iv_msgQ, msg);
+ break;
+
+ case MSG_MM_RP_PERM:
+ msg->data[1] = -EINVAL;
+ msg_respond(iv_msgQ, msg);
+ break;
+
+ default:
+ msg_free(msg);
+ break;
+ }
+ } // while(1)
+}
+
+// ----------------------------------------------------------------------------
+
+void VfsRp::_load_unload(msg_t * i_msg)
+{
+ errlHndl_t err = NULL;
+ // Find VfsSystemModule
+ // The TOC for the extended image sits at the start of the image and is
+ // not location dependant, so just use the one pointed to by iv_pnor_vaddr
+ // to avoid having to copy it to this block
+ VfsSystemModule * module =
+ vfs_find_module
+ (
+ (VfsSystemModule *)iv_pnor_vaddr, //VFS_EXTENDED_MODULE_TABLE_ADDRESS,
+ (const char *) i_msg->data[0]
+ );
+
+ if(module)
+ {
+ // TODO mark text page(s) as ro/executable
+ // TODO mark data page(s) as rw
+ if(i_msg->type == VFS_MSG_LOAD)
+ {
+ if(module->init)
+ {
+ (module->init)(NULL);
+ }
+ }
+ else // unload
+ {
+ if(module->fini)
+ {
+ (module->fini)(NULL);
+ }
+
+ // TODO mark pages as no access
+ }
+ }
+ else
+ {
+ // TODO error log? for now it's probably in the base
+ // and is aready loaded and initialized.
+ TRACFBIN(g_trac_vfs, ERR_MRK"Module not found: ",
+ (const char *) i_msg->data[0],
+ strlen((const char *) i_msg->data[0]) );
+ }
+ i_msg->data[0] = (uint64_t) err;
+ msg_respond(iv_msgQ, i_msg);
+}
+
+// ----------------------------------------------------------------------------
+
+void VfsRp::_exec(msg_t * i_msg)
+{
+ msg_t * msg1 = (msg_t *) i_msg->data[0];
+
+ // The TOC for the extended image sits at the start of the image and is
+ // not location dependant, so just use the one pointed to by iv_pnor_vaddr
+ // to avoid having to copy it to this block
+ VfsSystemModule * module =
+ vfs_find_module((VfsSystemModule *)(iv_pnor_vaddr +
+ VFS_EXTENDED_MODULE_TABLE_OFFSET),
+ (const char*) msg1->data[0]);
+
+ tid_t child = vfs_exec(module, (void*) msg1->data[1]);
+
+ msg_q_t vfsRmsgQ = (msg_q_t) i_msg->data[1];
+
+ msg1->data[0] = child;
+
+ msg_respond(vfsRmsgQ,msg1);
+ msg_free(i_msg);
+}
+
+
+// -- External interface ------------------------------------------------------
+
+errlHndl_t VFS::module_load_unload(const char * i_module, VfsMessages i_msgtype)
+{
+ errlHndl_t err = NULL;
+ msg_q_t vfsQ = msg_q_resolve(VFS_MSG);
+ msg_t* msg = msg_allocate();
+ msg->type = i_msgtype;
+ msg->data[0] = (uint64_t) i_module;
+ int rc = msg_sendrecv(vfsQ, msg);
+
+ if (0 == rc)
+ {
+ err = (errlHndl_t) msg->data[0];
+ }
+ else
+ {
+ err = new ERRORLOG::ErrlEntry
+ (
+ ERRORLOG::ERRL_SEV_CRITICAL_SYS_TERM, // severity
+ VFS::VFS_MODULE_ID, // moduleid
+ VFS::VFS_LOAD_FAILED, // reason Code
+ rc, // user1 = msg_sendrecv rc
+ i_msgtype // user2 = message type
+ );
+ }
+
+ msg_free(msg);
+ return err;
+}
+
diff --git a/src/usr/vfs/vfsrp.H b/src/usr/vfs/vfsrp.H
new file mode 100644
index 000000000..456979e2d
--- /dev/null
+++ b/src/usr/vfs/vfsrp.H
@@ -0,0 +1,90 @@
+#ifndef VFSRP_H
+#define VFSRP_H
+
+#include <stdint.h>
+#include <builtins.h>
+#include <errl/errltypes.H>
+
+struct msg_t;
+
+namespace VFS
+{
+ void vfs_msg_handler(void * unused);
+
+ /**
+ * Virtual File System Service
+ */
+ class VfsRp
+ {
+ public:
+
+ /**
+ * static init
+ * @param[in] task args
+ */
+ static void init(void * i_taskArgs);
+
+ protected:
+ /**
+ * Ctor
+ */
+ VfsRp() : iv_msgQ(NULL), iv_pnor_vaddr(0) {}
+
+ /**
+ * Dtor
+ */
+ ~VfsRp();
+
+ /**
+ * Start message handler
+ */
+ static void msg_handler(void * unused);
+
+ /**
+ * Load or Unload a module
+ * @param[in] i_msg the message
+ * @note Does not return. calls task_end()
+ */
+ static void load_unload(void * i_msg);
+
+ /**
+ * Call _start on module
+ * @param[in] i_msg the message
+ * @note Does not return. calls task_end()
+ */
+ static void exec(void * i_msg);
+
+ private: // functions
+
+ /**
+ * Initialize this object
+ * @return return code on error
+ */
+ errlHndl_t _init();
+
+ /**
+ * Message handler
+ */
+ void msgHandler();
+
+ /**
+ * Load or Unload a module
+ * @param[in] i_msg the message
+ */
+ void _load_unload(msg_t * i_msg);
+
+ /**
+ * Call _start on module
+ * @param[in] i_msg the message
+ */
+ void _exec(msg_t * i_msg);
+
+ private: // data
+
+ msg_q_t iv_msgQ; //!< message queue
+ uint64_t iv_pnor_vaddr; //!< virtual address of ext image in PFNOR
+ };
+
+}; // VFS namepsace
+
+#endif
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