VirtualBox

source: vbox/trunk/src/VBox/Runtime/generic/RTMpGetDescription-generic.cpp@ 25046

Last change on this file since 25046 was 21725, checked in by vboxsync, 15 years ago

iprt: Added RTMpGetDescription.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 3.6 KB
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1/* $Id: RTMpGetDescription-generic.cpp 21725 2009-07-20 13:10:08Z vboxsync $ */
2/** @file
3 * IPRT - Multiprocessor, Generic RTMpGetDescription.
4 */
5
6/*
7 * Copyright (C) 2009 Sun Microsystems, Inc.
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 *
26 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
27 * Clara, CA 95054 USA or visit http://www.sun.com if you need
28 * additional information or have any questions.
29 */
30
31
32/*******************************************************************************
33* Header Files *
34*******************************************************************************/
35#include <iprt/mp.h>
36#include "internal/iprt.h"
37#include <iprt/asm.h>
38#include <iprt/string.h>
39
40
41
42/**
43 * Returns "Unknown" as description.
44 *
45 * @returns VERR_BUFFER_OVERFLOW or VINF_SUCCESS.
46 * @param pszBuf Output buffer.
47 * @param cbBuf Buffer size.
48 */
49static int rtMpGetDescriptionUnknown(char *pszBuf, size_t cbBuf)
50{
51 static const char s_szUnknown[] = "Unknown";
52 if (cbBuf < sizeof(s_szUnknown))
53 return VERR_BUFFER_OVERFLOW;
54 memcpy(pszBuf, s_szUnknown, sizeof(s_szUnknown));
55 return VINF_SUCCESS;
56}
57
58
59RTDECL(int) RTMpGetDescription(RTCPUID idCpu, char *pszBuf, size_t cbBuf)
60{
61 /*
62 * Check that the specified cpu is valid & online.
63 */
64 if (!RTMpIsCpuOnline(idCpu))
65 return RTMpIsCpuPossible(idCpu)
66 ? VERR_CPU_OFFLINE
67 : VERR_CPU_NOT_FOUND;
68
69 /*
70 * Construct the description string in a temporary buffer.
71 */
72 char szString[4*4*3+1] = {0};
73#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
74 if (!ASMHasCpuId())
75 return rtMpGetDescriptionUnknown(pszBuf, cbBuf);
76
77 uint32_t uMax;
78 uint32_t uEBX, uECX, uEDX;
79 ASMCpuId(0x80000000, &uMax, &uEBX, &uECX, &uEDX);
80 if (uMax >= 0x80000002)
81 {
82 ASMCpuId(0x80000002, &szString[0 + 0], &szString[0 + 4], &szString[0 + 8], &szString[0 + 12]);
83 if (uMax >= 0x80000003)
84 ASMCpuId(0x80000003, &szString[16 + 0], &szString[16 + 4], &szString[16 + 8], &szString[16 + 12]);
85 if (uMax >= 0x80000004)
86 ASMCpuId(0x80000004, &szString[32 + 0], &szString[32 + 4], &szString[32 + 8], &szString[32 + 12]);
87 }
88 else
89 {
90 ASMCpuId(0x00000000, &uMax, &uEBX, &uECX, &uEDX);
91 ((uint32_t *)&szString[0])[0] = uEBX;
92 ((uint32_t *)&szString[0])[1] = uEDX;
93 ((uint32_t *)&szString[0])[2] = uECX;
94 }
95
96#else
97# error "PORTME or use RTMpGetDescription-generic-stub.cpp."
98#endif
99
100 /*
101 * Copy it out into the buffer supplied by the caller.
102 */
103 size_t cch = strlen(szString);
104 if (cch >= cbBuf)
105 return VERR_BUFFER_OVERFLOW;
106 memcpy(pszBuf, szString, cch + 1);
107 return VINF_SUCCESS;
108}
109RT_EXPORT_SYMBOL(RTMpGetDescription);
110
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