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/* IBM_PROLOG_BEGIN_TAG
* This is an automatically generated prolog.
*
* $Source: src/include/kernel/misc.H $
*
* IBM CONFIDENTIAL
*
* COPYRIGHT International Business Machines Corp. 2011-2012
*
* 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 other-
* wise divested of its trade secrets, irrespective of what has
* been deposited with the U.S. Copyright Office.
*
* Origin: 30
*
* 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>
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;
/** @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.
*/
WinkleCore(task_t* i_caller) :
iv_caller(i_caller), iv_timebase(0) {};
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;
};
};
#endif
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