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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/kernel/misc.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2011,2017 */
/* [+] 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 */
/** @file misc.H
* @brief Misc. Kernel functions and utilities.
*/
#ifndef __KERNEL_MISC_H
#define __KERNEL_MISC_H
#include <stdint.h>
#include <usr/vmmconst.h>
#include <kernel/deferred.H>
#include <kernel/task.H>
#include <kernel/memstate.H>
#include <sys/mmio.h>
namespace KernelMisc
{
/** @fn shutdown
* @brief Sequence kernel to shutdown and switch to payload.
*/
void shutdown();
/** @brief Base address (target HRMOR) of the payload. */
extern uint64_t g_payload_base;
/** @brief Address from base of payload entry-point. */
extern uint64_t g_payload_entry;
/** @brief Address from base of payload data pointer. */
extern uint64_t g_payload_data;
/** @brief master host boot instance number (node) */
extern uint64_t g_masterHBInstance;
/** @brief master host boot additional error data (node) */
extern uint32_t g_error_data;
/** @brief Indicate whether HB is running or not */
enum HbRunning
{
HB_RUNNING = 0,
HB_STARTED_PAYLOAD = 1,
HB_BOOTLOADER = 2,
HB_START_BASE_IMAGE = 3,
HB_SHUTDOWN = 4,
};
/** @fn setHbScratchStatus
* @brief Set scratch register indicating HB running status
*
* @param i_status Indicates whether to say HB is running or shutdown
* @return void
*/
void setHbScratchStatus(enum HbRunning i_status);
/** @fn in_kernel_mode
* @brief Determine if the code is currently in kernel mode or not.
*
* @return [true | false]
*/
inline bool in_kernel_mode()
{
uint64_t stack = 0;
asm volatile("mr %0, 1" : "=r"(stack));
if((stack >= VMM_VADDR_STACK_SEGMENT) &&
(stack < (VMM_VADDR_STACK_SEGMENT + VMM_SEGMENT_SIZE)))
{
return false;
}
return true;
}
/** @class WinkleCore
*
* @brief DeferredWork class for implementing cpu_master_winkle.
*/
class WinkleCore : public ::DeferredWork
{
public:
/** ctor
*
* @param i_caller - Task calling cpu_master_winkle to be
* restored after winkle is complete.
* @param i_fusedCores - true if using 8 threaded cores
*/
WinkleCore(task_t* i_caller, bool i_fusedCores) :
iv_caller(i_caller), iv_timebase(0),
iv_fusedCores(i_fusedCores) {};
void masterPreWork();
void activeMainWork();
void masterPostWork();
void nonactiveMainWork();
private:
/** Caller of cpu_master_winkle() */
task_t* iv_caller;
/** Current time-base value for restore after winkle. */
uint64_t iv_timebase;
/** Fused core has 8 threads per core (normal is 4). */
/** So when winkling core, we need a 2nd core started. */
bool iv_fusedCores;
};
/** @class WinkleAll
*
* @brief DeferredWork class for implementing cpu_all_winkle.
*/
class WinkleAll : public ::DeferredWork
{
public:
/** ctor
*
* @param i_caller - Task calling cpu_all_winkle to be restored
* after winkle is complete.
*
*/
WinkleAll(task_t* i_caller) :
iv_caller(i_caller), iv_timebase(0), iv_firstThread(0) {};
void masterPreWork();
void activeMainWork();
void masterPostWork();
void nonactiveMainWork();
private:
/** Caller of cpu_all_winkle() */
task_t* iv_caller;
/** Current time-base value for restore after winkle. */
uint64_t iv_timebase;
/** Sync value for first thread to wake up. */
uint64_t iv_firstThread;
};
/** @fn expand_full_cache
*
* @brief Expands the image footprint from a half-cache to full-cache
* mode or to reduced-cache mode.
*
* @param[in] i_expandSize - Total expanded cache size.
*
* @return 0 or -errno
*/
int expand_full_cache(uint64_t i_expandSize);
/** @fn populate_cache_lines
*
* @brief Populates a range of memory addresses into the cache via dcbz.
*
* This is meant to be used while the processor is in cache-contained
* mode. The entire cache line is zero'd so if the range is less then
* a cache-line, or starts misaligned, then more memory might be zero'd
* then would be expected.
*
* @param[in] i_start - Address to start dcbz at.
* @param[in] i_end - Address to stop dcbz at.
* (This address is not dcbz'd itself)
*/
void populate_cache_lines(uint64_t* i_start, uint64_t* i_end);
/** @fn set
*
* @brief Update value of scratch register to specified data.
*
* This is used to update any core scratch reg defined by the enum
* MMIO_SCRATCH_REG with the data passed in.
*
* NOTE: This function is a wrapper function for writeScratchReg that
* takes care of modifying the scratch register address value depending
* on the getCPUType. The writeScratchReg takes the scratch address
* passed in and puts that data in that register using assembly code
*
* @param[in] uint64_t - scratch_addr
* @param[in] uint64_t - Data
*/
void updateScratchReg(MMIO_Scratch_Register scratch_addr, uint64_t data);
};
#endif
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