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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/sys/vfs.h $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2010,2017 */
/* [+] 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 __SYS_VFS_H
#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 visible to the linker
#include <sys/task.h>
#endif
#ifndef __HOSTBOOT_RUNTIME
// make VFS_MODULE_MAX equal to the actual number of modules in the base image (+ 2?)
#define VFS_MODULE_MAX 16
#else
#define VFS_MODULE_MAX 64
#endif
// 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
// Note: VFS_EXTENDED_MODULE_MAX used in src/build/buildpnor/buildpnor.pl
#define VFS_EXTENDED_MODULE_MAX 128
#define VFS_MODULE_NAME_MAX 64
#define VFS_SYMBOL_INIT _init
#define VFS_SYMBOL_START _start
#define VFS_SYMBOL_FINI _fini
#define VFS_SYMBOL_TEXT .text
#define VFS_SYMBOL_DATA .data
#define VFS_STRINGIFY(X) #X
#define VFS_TOSTRING(X) VFS_STRINGIFY(X)
#define VFS_MODULE_DEFINE_START(f) \
extern "C" void VFS_SYMBOL_START(void* args) \
{ \
f(args); \
}
#ifdef __cplusplus
extern "C"
{
#endif
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_ROOT_MSG_VFS;
extern const char* VFS_ROOT_MSG_INTR;
enum VfsMessages
{
VFS_MSG_REGISTER_MSGQ, //!< Message to VFS_ROOT to register a message queue
VFS_MSG_REMOVE_MSGQ, //!< Message to VFS_ROOT to remove 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 vfsrp to load a module
VFS_MSG_UNLOAD, //!< Message to vfsrp to unload a module
};
// Note: size of VfsSystemModule (VFS_MODULE_TABLE_ENTRY_SIZE) used in
// src/build/buildpnor/buildpnor.pl
struct VfsSystemModule
{
char module[VFS_MODULE_NAME_MAX]; //!< Module name
void (*init)(void*); //!< ptr to init()
void (*start)(void*); //!< ptr to start()
void (*fini)(void*); //!< ptr to fini()
uint64_t * text; //!< ptr to text (code) section
uint64_t * data; //!< ptr to data section
uint64_t byte_count; //!< no. of bytes in module
};
extern VfsSystemModule VFS_MODULES[VFS_MODULE_MAX];
extern uint64_t VFS_LAST_ADDRESS;
#define VFS_MODULE_TABLE_SIZE (VFS_EXTENDED_MODULE_MAX * sizeof(VfsSystemModule))
// Offset for TLS "dtv-relative displacement".
// See http://www.uclibc.org/docs/tls-ppc64.txt
#define VFS_PPC64_DTPREL_OFFSET 0x8000
#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);
/**
* Find the VfsSystemModule for the given address
* @param[in] i_table The VFS module table to look in
* @param[in] i_vaddr The virtual address
* @return VrsSytemModule ptr for the module | NULL if not found
*/
VfsSystemModule * vfs_find_address(VfsSystemModule * i_table,
const void * i_vaddr);
/**
* Get the module's start routine
* @param[in] i_module VfsSystemModule data for the module
* @return Function pointer of module's start or negative value on error.
* @retval -ENOENT if i_module is NULL
* @retval -ENOEXEC if there is no start()
*/
void* vfs_start_entrypoint(VfsSystemModule * i_module);
/**
* Change permissions on the virtual pages associated with the module
* @param[in] module The vfsSystemModule
* @return rc from mm_set_permission()
*/
int vfs_module_perms(VfsSystemModule* module);
#endif
#endif
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