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/* $Id$ */
/** @file
* IPRT - Multiprocessor, Generic RTMpGetDescription.
*/
/*
* Copyright (C) 2009-2010 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <iprt/mp.h>
#include "internal/iprt.h"
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
# include <iprt/asm-amd64-x86.h>
#endif
#include <iprt/string.h>
/**
* Returns "Unknown" as description.
*
* @returns VERR_BUFFER_OVERFLOW or VINF_SUCCESS.
* @param pszBuf Output buffer.
* @param cbBuf Buffer size.
*/
static int rtMpGetDescriptionUnknown(char *pszBuf, size_t cbBuf)
{
static const char s_szUnknown[] = "Unknown";
if (cbBuf < sizeof(s_szUnknown))
return VERR_BUFFER_OVERFLOW;
memcpy(pszBuf, s_szUnknown, sizeof(s_szUnknown));
return VINF_SUCCESS;
}
RTDECL(int) RTMpGetDescription(RTCPUID idCpu, char *pszBuf, size_t cbBuf)
{
/*
* Check that the specified cpu is valid & online.
*/
if (!RTMpIsCpuOnline(idCpu))
return RTMpIsCpuPossible(idCpu)
? VERR_CPU_OFFLINE
: VERR_CPU_NOT_FOUND;
/*
* Construct the description string in a temporary buffer.
*/
char szString[4*4*3+1];
RT_ZERO(szString);
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
if (!ASMHasCpuId())
return rtMpGetDescriptionUnknown(pszBuf, cbBuf);
uint32_t uMax;
uint32_t uEBX, uECX, uEDX;
ASMCpuId(0x80000000, &uMax, &uEBX, &uECX, &uEDX);
if (uMax >= 0x80000002)
{
ASMCpuId(0x80000002, &szString[0 + 0], &szString[0 + 4], &szString[0 + 8], &szString[0 + 12]);
if (uMax >= 0x80000003)
ASMCpuId(0x80000003, &szString[16 + 0], &szString[16 + 4], &szString[16 + 8], &szString[16 + 12]);
if (uMax >= 0x80000004)
ASMCpuId(0x80000004, &szString[32 + 0], &szString[32 + 4], &szString[32 + 8], &szString[32 + 12]);
}
else
{
ASMCpuId(0x00000000, &uMax, &uEBX, &uECX, &uEDX);
((uint32_t *)&szString[0])[0] = uEBX;
((uint32_t *)&szString[0])[1] = uEDX;
((uint32_t *)&szString[0])[2] = uECX;
}
#else
# error "PORTME or use RTMpGetDescription-generic-stub.cpp."
#endif
/*
* Copy it out into the buffer supplied by the caller.
*/
size_t cch = strlen(szString);
if (cch >= cbBuf)
return VERR_BUFFER_OVERFLOW;
memcpy(pszBuf, szString, cch + 1);
return VINF_SUCCESS;
}
RT_EXPORT_SYMBOL(RTMpGetDescription);
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