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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/runtime/rt_main.C $ */
/* */
/* IBM CONFIDENTIAL */
/* */
/* COPYRIGHT International Business Machines Corp. 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 */
#include <builtins.h>
#include <limits.h>
#include <runtime/interface.h>
#include <util/singleton.H>
#include <stdio.h>
#include <util/align.H>
// Address of the first writable page, initialized by the linker.
extern void* data_load_address;
// Forward declaration to vfs code.
void vfs_module_init();
/** @fn _main
*
* @brief Entry point called from Sapphire to initialize RT image.
*
* @param[in] intf - Runtime interfaces structure from Sapphire.
* @param[in] base - Memory address of the start of the RT image.
*
* @return - runtimeInterfaces_t* - Pointer to RT image's interfaces.
*
* This function is required to be in the .text.intvects section so that
* it is placed into the first page (4k) of the image. When HB IPL
* loads the RT image for CxxTest execution it will only mark the first
* page executable. The remainder is marked execute via callbacks from
* within _main.
*/
extern "C"
{
runtimeInterfaces_t* _main(hostInterfaces_t*, uint64_t base)
SYMB_SECTION(".text.intvects");
}
/** @fn rt_start
*
* @brief Remainder of RT image initializion.
*
* After _main marks pages executable we can leave the first page of the
* image. This function performs the bulk of the initialization:
*
* 1) Call C++ constructors for this image.
* 2) Load all modules in the image.
*
* @param[in] intf - Runtime interfaces structure from Sapphire.
*/
runtimeInterfaces_t* rt_start(hostInterfaces_t*) NEVER_INLINE;
/** Call C++ constructors present in this image. */
void rt_cppBootstrap();
runtimeInterfaces_t* _main(hostInterfaces_t* intf, uint64_t base)
{
// Ensure remainder of image has text pages marked execute.
for (uint64_t i = base;
i < ALIGN_PAGE_DOWN((uint64_t)&data_load_address);
i += PAGESIZE)
{
(intf->set_page_execute)(reinterpret_cast<void*>(i));
}
// Tail-recurse to real entry point.
return rt_start(intf);
}
runtimeInterfaces_t* rt_start(hostInterfaces_t* intf)
{
(intf->puts)("Starting Runtime Services....\n");
// Save a pointer to interfaces from Sapphire.
g_hostInterfaces = intf;
// Call C++ constructors.
rt_cppBootstrap();
// Initialize all modules.
vfs_module_init();
// Return our interface pointer structure.
return getRuntimeInterfaces();
}
void rt_cppBootstrap()
{
// Call default constructors for any static objects.
extern void (*ctor_start_address)();
extern void (*ctor_end_address)();
void(**ctors)() = &ctor_start_address;
while(ctors != &ctor_end_address)
{
(*ctors)();
ctors++;
}
}
hostInterfaces_t* g_hostInterfaces = NULL;
runtimeInterfaces_t* getRuntimeInterfaces()
{
return &Singleton<runtimeInterfaces_t>::instance();
}
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