1/*
2 * Copyright (c) 2008 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#include "arch/x86/cpuid.hh"
32
33#include "base/bitfield.hh"
34#include "cpu/thread_context.hh"
35
36namespace X86ISA {
37 enum StandardCpuidFunction {
38 VendorAndLargestStdFunc,
39 FamilyModelStepping,
40 CacheAndTLB,
41 SerialNumber,
42 CacheParams,
43 MonitorMwait,
44 ThermalPowerMgmt,
45 ExtendedFeatures,
46 NumStandardCpuidFuncs
47 };
48
49 enum ExtendedCpuidFunctions {
50 VendorAndLargestExtFunc,
51 FamilyModelSteppingBrandFeatures,
52 NameString1,
53 NameString2,
54 NameString3,
55 L1CacheAndTLB,
56 L2L3CacheAndL2TLB,
57 APMInfo,
58 LongModeAddressSize,
59
60 /*
61 * The following are defined by the spec but not yet implemented
62 */
63/* // Function 9 is reserved
64 SVMInfo = 10,
65 // Functions 11-24 are reserved
66 TLB1GBPageInfo = 25,
67 PerformanceInfo,*/
68
69 NumExtendedCpuidFuncs
70 };
71
72 static const int vendorStringSize = 13;
73 static const char vendorString[vendorStringSize] = "M5 Simulator";
74 static const int nameStringSize = 48;
75 static const char nameString[nameStringSize] = "Fake M5 x86_64 CPU";
76
77 uint64_t
78 stringToRegister(const char *str)
79 {
80 uint64_t reg = 0;
81 for (int pos = 3; pos >=0; pos--) {
82 reg <<= 8;
83 reg |= str[pos];
84 }
85 return reg;
86 }
87
88 bool
89 doCpuid(ThreadContext * tc, uint32_t function,
90 uint32_t index, CpuidResult &result)
91 {
92 uint16_t family = bits(function, 31, 16);
93 uint16_t funcNum = bits(function, 15, 0);
94 if (family == 0x8000) {
95 // The extended functions
96 switch (funcNum) {
97 case VendorAndLargestExtFunc:
98 assert(vendorStringSize >= 12);
99 result = CpuidResult(
100 0x80000000 + NumExtendedCpuidFuncs - 1,
101 stringToRegister(vendorString),
102 stringToRegister(vendorString + 4),
103 stringToRegister(vendorString + 8));
104 break;
105 case FamilyModelSteppingBrandFeatures:
106 result = CpuidResult(0x00020f51, 0x00000405,
107 0xe3d3fbff, 0x00000001);
108 break;
109 case NameString1:
110 case NameString2:
111 case NameString3:
112 {
113 // Zero fill anything beyond the end of the string. This
114 // should go away once the string is a vetted parameter.
115 char cleanName[nameStringSize];
116 memset(cleanName, '\0', nameStringSize);
117 strncpy(cleanName, nameString, nameStringSize);
118
119 int offset = (funcNum - NameString1) * 16;
120 assert(nameStringSize >= offset + 16);
121 result = CpuidResult(
122 stringToRegister(cleanName + offset + 0),
123 stringToRegister(cleanName + offset + 4),
124 stringToRegister(cleanName + offset + 12),
125 stringToRegister(cleanName + offset + 8));
126 }
127 break;
128 case L1CacheAndTLB:
129 result = CpuidResult(0xff08ff08, 0xff20ff20,
130 0x40020140, 0x40020140);
131 break;
132 case L2L3CacheAndL2TLB:
133 result = CpuidResult(0x00000000, 0x42004200,
134 0x00000000, 0x04008140);
135 break;
136 case APMInfo:
137 result = CpuidResult(0x80000018, 0x68747541,
138 0x69746e65, 0x444d4163);
139 break;
140 case LongModeAddressSize:
141 result = CpuidResult(0x00003030, 0x00000000,
142 0x00000000, 0x00000000);
143 break;
144/* case SVMInfo:
145 case TLB1GBPageInfo:
146 case PerformanceInfo:*/
147 default:
148 warn("x86 cpuid family 0x8000: unimplemented function %u",
149 funcNum);
150 return false;
151 }
152 } else if (family == 0x0000) {
153 // The standard functions
154 switch (funcNum) {
155 case VendorAndLargestStdFunc:
156 assert(vendorStringSize >= 12);
157 result = CpuidResult(
158 NumStandardCpuidFuncs - 1,
159 stringToRegister(vendorString),
160 stringToRegister(vendorString + 4),
161 stringToRegister(vendorString + 8));
162 break;
163 case FamilyModelStepping:
164 result = CpuidResult(0x00020f51, 0x00000805,
| 1/*
2 * Copyright (c) 2008 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#include "arch/x86/cpuid.hh"
32
33#include "base/bitfield.hh"
34#include "cpu/thread_context.hh"
35
36namespace X86ISA {
37 enum StandardCpuidFunction {
38 VendorAndLargestStdFunc,
39 FamilyModelStepping,
40 CacheAndTLB,
41 SerialNumber,
42 CacheParams,
43 MonitorMwait,
44 ThermalPowerMgmt,
45 ExtendedFeatures,
46 NumStandardCpuidFuncs
47 };
48
49 enum ExtendedCpuidFunctions {
50 VendorAndLargestExtFunc,
51 FamilyModelSteppingBrandFeatures,
52 NameString1,
53 NameString2,
54 NameString3,
55 L1CacheAndTLB,
56 L2L3CacheAndL2TLB,
57 APMInfo,
58 LongModeAddressSize,
59
60 /*
61 * The following are defined by the spec but not yet implemented
62 */
63/* // Function 9 is reserved
64 SVMInfo = 10,
65 // Functions 11-24 are reserved
66 TLB1GBPageInfo = 25,
67 PerformanceInfo,*/
68
69 NumExtendedCpuidFuncs
70 };
71
72 static const int vendorStringSize = 13;
73 static const char vendorString[vendorStringSize] = "M5 Simulator";
74 static const int nameStringSize = 48;
75 static const char nameString[nameStringSize] = "Fake M5 x86_64 CPU";
76
77 uint64_t
78 stringToRegister(const char *str)
79 {
80 uint64_t reg = 0;
81 for (int pos = 3; pos >=0; pos--) {
82 reg <<= 8;
83 reg |= str[pos];
84 }
85 return reg;
86 }
87
88 bool
89 doCpuid(ThreadContext * tc, uint32_t function,
90 uint32_t index, CpuidResult &result)
91 {
92 uint16_t family = bits(function, 31, 16);
93 uint16_t funcNum = bits(function, 15, 0);
94 if (family == 0x8000) {
95 // The extended functions
96 switch (funcNum) {
97 case VendorAndLargestExtFunc:
98 assert(vendorStringSize >= 12);
99 result = CpuidResult(
100 0x80000000 + NumExtendedCpuidFuncs - 1,
101 stringToRegister(vendorString),
102 stringToRegister(vendorString + 4),
103 stringToRegister(vendorString + 8));
104 break;
105 case FamilyModelSteppingBrandFeatures:
106 result = CpuidResult(0x00020f51, 0x00000405,
107 0xe3d3fbff, 0x00000001);
108 break;
109 case NameString1:
110 case NameString2:
111 case NameString3:
112 {
113 // Zero fill anything beyond the end of the string. This
114 // should go away once the string is a vetted parameter.
115 char cleanName[nameStringSize];
116 memset(cleanName, '\0', nameStringSize);
117 strncpy(cleanName, nameString, nameStringSize);
118
119 int offset = (funcNum - NameString1) * 16;
120 assert(nameStringSize >= offset + 16);
121 result = CpuidResult(
122 stringToRegister(cleanName + offset + 0),
123 stringToRegister(cleanName + offset + 4),
124 stringToRegister(cleanName + offset + 12),
125 stringToRegister(cleanName + offset + 8));
126 }
127 break;
128 case L1CacheAndTLB:
129 result = CpuidResult(0xff08ff08, 0xff20ff20,
130 0x40020140, 0x40020140);
131 break;
132 case L2L3CacheAndL2TLB:
133 result = CpuidResult(0x00000000, 0x42004200,
134 0x00000000, 0x04008140);
135 break;
136 case APMInfo:
137 result = CpuidResult(0x80000018, 0x68747541,
138 0x69746e65, 0x444d4163);
139 break;
140 case LongModeAddressSize:
141 result = CpuidResult(0x00003030, 0x00000000,
142 0x00000000, 0x00000000);
143 break;
144/* case SVMInfo:
145 case TLB1GBPageInfo:
146 case PerformanceInfo:*/
147 default:
148 warn("x86 cpuid family 0x8000: unimplemented function %u",
149 funcNum);
150 return false;
151 }
152 } else if (family == 0x0000) {
153 // The standard functions
154 switch (funcNum) {
155 case VendorAndLargestStdFunc:
156 assert(vendorStringSize >= 12);
157 result = CpuidResult(
158 NumStandardCpuidFuncs - 1,
159 stringToRegister(vendorString),
160 stringToRegister(vendorString + 4),
161 stringToRegister(vendorString + 8));
162 break;
163 case FamilyModelStepping:
164 result = CpuidResult(0x00020f51, 0x00000805,
|