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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/runtime/fakepayload.H $ */
/* */
/* 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 */
#ifndef __RUNTIME_FAKEPAYLOAD_H
#define __RUNTIME_FAKEPAYLOAD_H
/** @file fakepayload.H
* @brief Interfaces for loading a 'fake' payload when a payload is not
* present.
*
* The purpose of the fake payload is to be able to exercise the Hostboot
* shutdown path, even when there is not a real payload.
*
* This payload will simply nap all of the processors.
*/
#include <stdint.h>
#include <arch/ppc.H>
namespace RUNTIME
{
/** @class FakePayload
*
* @brief Handles loading of the fake payload.
*
* Places the payload into the area of memory determined by the
* PAYLOAD_BASE / PAYLOAD_ENTRY attributes.
*
* @note This class does not perform verification that the addresses
* in the attributes are actually reasonable values. It is assumed
* that attribute verification (ex. for SecureBoot) will be done
* elsewhere in a central place for all payloads.
*/
class FakePayload
{
public:
/** Load payload into memory. */
static void load();
private:
/** The fake payload itself. */
static void payload()
__attribute__((no_instrument_function));
/** Size of the payload (in bytes). */
static const size_t size;
/** @brief Size of memory to securely erase before loading
* the payload.
*
* For SecureBoot we cannot trust anything the FSP has left in
* memory. While we're loading a payload function into memory,
* the FSP had access to memory and could have loaded exception
* handlers. We need to clear out at least this much space in
* order to ensure that none of the interrupt handlers could be
* residing in memory.
*/
static const size_t safeClearArea;
};
}
#endif
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