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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/runtime/rt_main.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2013,2015 */
/* [+] 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 */
#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)
{
if (NULL != intf->set_page_execute)
{
(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 runtime interfaces.
runtimeInterfaces_t* rtInterfaces = getRuntimeInterfaces();
rtInterfaces->interfaceVersion = HOSTBOOT_RUNTIME_INTERFACE_VERSION;
// Initialize all modules.
vfs_module_init();
// TODO RTC 134050 This is the ideal place for initialization calls.
// Opal has not initialized pnor or ipmi, so initialization
// was moved to attn enable as a short term measure.
#if 0
// apply temp overrides
postInitCalls_t* rtPost = getPostInitCalls();
rtPost->callApplyTempOverrides();
#endif
// Return our interface pointer structure.
return rtInterfaces;
}
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();
}
postInitCalls_t* getPostInitCalls()
{
return &Singleton<postInitCalls_t>::instance();
}
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