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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/kernel/kernel.C $ */
/* */
/* 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 */
#include <stdint.h>
#include <kernel/console.H>
#include <kernel/pagemgr.H>
#include <kernel/heapmgr.H>
#include <kernel/cpumgr.H>
#include <util/singleton.H>
#include <kernel/cpu.H>
#include <kernel/task.H>
#include <kernel/scheduler.H>
#include <kernel/taskmgr.H>
#include <kernel/vmmmgr.H>
#include <kernel/timemgr.H>
#include <sys/vfs.h>
#include <kernel/deferred.H>
#include <kernel/misc.H>
#include <util/align.H>
#include <securerom/sha512.H>
#include <kernel/bltohbdatamgr.H>
#include <kernel/cpuid.H>
#include <stdlib.h>
extern "C" void kernel_dispatch_task();
extern void* init_main(void* unused);
extern uint64_t kernel_other_thread_spinlock;
class Kernel
{
public:
void cppBootstrap();
void memBootstrap();
void cpuBootstrap();
void inittaskBootstrap();
protected:
Kernel() {};
};
/**
* @brief Searches multiple locations for the BlToHbData structure.
*
* @description Due to the possibility of a mismatch between the bootloader and
* hostboot, we must check every location of this structure in
* history. Searches latest to oldest.
*
* @return if found, pointer to structure
* otherwise nullptr
*/
const Bootloader::BlToHbData* getBlToHbData()
{
const Bootloader::BlToHbData* l_resultBltoHbData = nullptr;
// Order bootloader addr versions from most recent to oldest
// Note: Defined here to limit code space in bootloader code
static const std::array<uint64_t,2> BlToHbDataAddrs =
{
BLTOHB_COMM_DATA_ADDR_LATEST,
BLTOHB_COMM_DATA_ADDR_V1
};
for (auto addr : BlToHbDataAddrs)
{
const auto l_bltoHbData =
reinterpret_cast<const Bootloader::BlToHbData*>(addr);
if(Bootloader::BlToHbDataValid(l_bltoHbData))
{
l_resultBltoHbData = l_bltoHbData;
break;
}
}
return l_resultBltoHbData;
}
extern "C"
int main()
{
printk("Booting %s kernel...\n\n", "Hostboot");
printk("CPU=%s\n",
ProcessorCoreTypeStrings[CpuID::getCpuType()]);
MAGIC_INST_PRINT_ISTEP(6,2);
// Erase task-pointer so that TaskManager::getCurrentTask() returns NULL.
setSPRG3(NULL);
Kernel& kernel = Singleton<Kernel>::instance();
kernel.cppBootstrap();
// Get pointer to BL and HB comm data
const auto l_pBltoHbData = getBlToHbData();
if ( l_pBltoHbData != nullptr )
{
printk("Valid BlToHbData found at 0x%lX\n", reinterpret_cast<uint64_t>(l_pBltoHbData));
// Initialize Secureboot Data class
g_BlToHbDataManager.initValid(*l_pBltoHbData);
}
else
{
printk("BL to HB commun invalid\n");
// Force invalidation of securebootdata
g_BlToHbDataManager.initInvalid();
}
kernel.memBootstrap();
kernel.cpuBootstrap();
// Let FSP/BMC know that Hostboot is now running
KernelMisc::setHbScratchStatus(KernelMisc::HB_RUNNING);
kernel.inittaskBootstrap();
// Ready to let the other CPUs go.
lwsync();
kernel_other_thread_spinlock = 1;
kernel_dispatch_task(); // no return.
while(1);
return 0;
}
extern "C"
int smp_slave_main(cpu_t* cpu)
{
// Erase task-pointer so that TaskManager::getCurrentTask() returns NULL.
setSPRG3(NULL);
CpuManager::init_slave_smp(cpu);
VmmManager::init_slb();
cpu->scheduler->setNextRunnable();
DeferredQueue::execute();
kernel_dispatch_task();
return 0;
}
void Kernel::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++;
}
}
void Kernel::memBootstrap()
{
PageManager::init();
HeapManager::init();
VmmManager::init();
}
void Kernel::cpuBootstrap()
{
TimeManager::init();
CpuManager::init();
}
void Kernel::inittaskBootstrap()
{
task_t * t = TaskManager::createTask(&init_main, NULL, true);
t->cpu = CpuManager::getCurrentCPU();
TaskManager::setCurrentTask(t);
}
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