utility.cc revision 6042 
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use of this software in source and binary forms,
6 * with or without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * The software must be used only for Non-Commercial Use which means any
10 * use which is NOT directed to receiving any direct monetary
11 * compensation for, or commercial advantage from such use.  Illustrative
12 * examples of non-commercial use are academic research, personal study,
13 * teaching, education and corporate research & development.
14 * Illustrative examples of commercial use are distributing products for
15 * commercial advantage and providing services using the software for
16 * commercial advantage.
17 *
18 * If you wish to use this software or functionality therein that may be
19 * covered by patents for commercial use, please contact:
20 *     Director of Intellectual Property Licensing
21 *     Office of Strategy and Technology
22 *     Hewlett-Packard Company
23 *     1501 Page Mill Road
24 *     Palo Alto, California  94304
25 *
26 * Redistributions of source code must retain the above copyright notice,
27 * this list of conditions and the following disclaimer.  Redistributions
28 * in binary form must reproduce the above copyright notice, this list of
29 * conditions and the following disclaimer in the documentation and/or
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31 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
32 * contributors may be used to endorse or promote products derived from
33 * this software without specific prior written permission.  No right of
34 * sublicense is granted herewith.  Derivatives of the software and
35 * output created using the software may be prepared, but only for
36 * Non-Commercial Uses.  Derivatives of the software may be shared with
37 * others provided: (i) the others agree to abide by the list of
38 * conditions herein which includes the Non-Commercial Use restrictions;
39 * and (ii) such Derivatives of the software include the above copyright
40 * notice to acknowledge the contribution from this software where
41 * applicable, this list of conditions and the disclaimer below.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 *
55 * Authors: Gabe Black
56 */
57
58#include "config/full_system.hh"
59
60#if FULL_SYSTEM
61#include "arch/x86/interrupts.hh"
62#endif
63#include "arch/x86/intregs.hh"
64#include "arch/x86/miscregs.hh"
65#include "arch/x86/segmentregs.hh"
66#include "arch/x86/utility.hh"
67#include "arch/x86/x86_traits.hh"
68#include "cpu/base.hh"
69#include "sim/system.hh"
70
71namespace X86ISA {
72
73uint64_t getArgument(ThreadContext *tc, int number, bool fp) {
74#if FULL_SYSTEM
75    panic("getArgument() not implemented for x86!\n");
76#else
77    panic("getArgument() only implemented for FULL_SYSTEM\n");
78    M5_DUMMY_RETURN
79#endif
80}
81
82# if FULL_SYSTEM
83void initCPU(ThreadContext *tc, int cpuId)
84{
85    // The otherwise unmodified integer registers should be set to 0.
86    for (int index = 0; index < NUM_INTREGS; index++) {
87        tc->setIntReg(index, 0);
88    }
89
90    // These next two loops zero internal microcode and implicit registers.
91    // They aren't specified by the ISA but are used internally by M5's
92    // implementation.
93    for (int index = 0; index < NumMicroIntRegs; index++) {
94        tc->setIntReg(INTREG_MICRO(index), 0);
95    }
96
97    for (int index = 0; index < NumImplicitIntRegs; index++) {
98        tc->setIntReg(INTREG_IMPLICIT(index), 0);
99    }
100
101    // Set integer register EAX to 0 to indicate that the optional BIST
102    // passed. No BIST actually runs, but software may still check this
103    // register for errors.
104    tc->setIntReg(INTREG_RAX, 0);
105
106    //The following values are dictated by the architecture for after a RESET#
107    tc->setMiscReg(MISCREG_CR0, 0x0000000060000010ULL);
108    tc->setMiscReg(MISCREG_CR2, 0);
109    tc->setMiscReg(MISCREG_CR3, 0);
110    tc->setMiscReg(MISCREG_CR4, 0);
111    tc->setMiscReg(MISCREG_CR8, 0);
112
113    tc->setMiscReg(MISCREG_RFLAGS, 0x0000000000000002ULL);
114
115    tc->setMiscReg(MISCREG_EFER, 0);
116
117    SegAttr dataAttr = 0;
118    dataAttr.writable = 1;
119    dataAttr.readable = 1;
120    dataAttr.expandDown = 0;
121    dataAttr.dpl = 0;
122    dataAttr.defaultSize = 0;
123
124    for (int seg = 0; seg != NUM_SEGMENTREGS; seg++) {
125        tc->setMiscReg(MISCREG_SEG_SEL(seg), 0);
126        tc->setMiscReg(MISCREG_SEG_BASE(seg), 0);
127        tc->setMiscReg(MISCREG_SEG_EFF_BASE(seg), 0);
128        tc->setMiscReg(MISCREG_SEG_LIMIT(seg), 0xffff);
129        tc->setMiscReg(MISCREG_SEG_ATTR(seg), dataAttr);
130    }
131
132    SegAttr codeAttr = 0;
133    codeAttr.writable = 0;
134    codeAttr.readable = 1;
135    codeAttr.expandDown = 0;
136    codeAttr.dpl = 0;
137    codeAttr.defaultSize = 0;
138
139    tc->setMiscReg(MISCREG_CS, 0xf000);
140    tc->setMiscReg(MISCREG_CS_BASE,
141            0x00000000ffff0000ULL);
142    tc->setMiscReg(MISCREG_CS_EFF_BASE,
143            0x00000000ffff0000ULL);
144    // This has the base value pre-added.
145    tc->setMiscReg(MISCREG_CS_LIMIT, 0xffffffff);
146    tc->setMiscReg(MISCREG_CS_ATTR, codeAttr);
147
148    tc->setPC(0x000000000000fff0ULL +
149            tc->readMiscReg(MISCREG_CS_BASE));
150    tc->setNextPC(tc->readPC() + sizeof(MachInst));
151
152    tc->setMiscReg(MISCREG_TSG_BASE, 0);
153    tc->setMiscReg(MISCREG_TSG_LIMIT, 0xffff);
154
155    tc->setMiscReg(MISCREG_IDTR_BASE, 0);
156    tc->setMiscReg(MISCREG_IDTR_LIMIT, 0xffff);
157
158    tc->setMiscReg(MISCREG_TSL, 0);
159    tc->setMiscReg(MISCREG_TSL_BASE, 0);
160    tc->setMiscReg(MISCREG_TSL_LIMIT, 0xffff);
161    tc->setMiscReg(MISCREG_TSL_ATTR, 0);
162
163    tc->setMiscReg(MISCREG_TR, 0);
164    tc->setMiscReg(MISCREG_TR_BASE, 0);
165    tc->setMiscReg(MISCREG_TR_LIMIT, 0xffff);
166    tc->setMiscReg(MISCREG_TR_ATTR, 0);
167
168    // This value should be the family/model/stepping of the processor.
169    // (page 418). It should be consistent with the value from CPUID, but the
170    // actual value probably doesn't matter much.
171    tc->setIntReg(INTREG_RDX, 0);
172
173    // TODO initialize x87, 64 bit, and 128 bit media state
174
175    tc->setMiscReg(MISCREG_MTRRCAP, 0x0508);
176    for (int i = 0; i < 8; i++) {
177        tc->setMiscReg(MISCREG_MTRR_PHYS_BASE(i), 0);
178        tc->setMiscReg(MISCREG_MTRR_PHYS_MASK(i), 0);
179    }
180    tc->setMiscReg(MISCREG_MTRR_FIX_64K_00000, 0);
181    tc->setMiscReg(MISCREG_MTRR_FIX_16K_80000, 0);
182    tc->setMiscReg(MISCREG_MTRR_FIX_16K_A0000, 0);
183    tc->setMiscReg(MISCREG_MTRR_FIX_4K_C0000, 0);
184    tc->setMiscReg(MISCREG_MTRR_FIX_4K_C8000, 0);
185    tc->setMiscReg(MISCREG_MTRR_FIX_4K_D0000, 0);
186    tc->setMiscReg(MISCREG_MTRR_FIX_4K_D8000, 0);
187    tc->setMiscReg(MISCREG_MTRR_FIX_4K_E0000, 0);
188    tc->setMiscReg(MISCREG_MTRR_FIX_4K_E8000, 0);
189    tc->setMiscReg(MISCREG_MTRR_FIX_4K_F0000, 0);
190    tc->setMiscReg(MISCREG_MTRR_FIX_4K_F8000, 0);
191
192    tc->setMiscReg(MISCREG_DEF_TYPE, 0);
193
194    tc->setMiscReg(MISCREG_MCG_CAP, 0x104);
195    tc->setMiscReg(MISCREG_MCG_STATUS, 0);
196    tc->setMiscReg(MISCREG_MCG_CTL, 0);
197
198    for (int i = 0; i < 5; i++) {
199        tc->setMiscReg(MISCREG_MC_CTL(i), 0);
200        tc->setMiscReg(MISCREG_MC_STATUS(i), 0);
201        tc->setMiscReg(MISCREG_MC_ADDR(i), 0);
202        tc->setMiscReg(MISCREG_MC_MISC(i), 0);
203    }
204
205    tc->setMiscReg(MISCREG_DR0, 0);
206    tc->setMiscReg(MISCREG_DR1, 0);
207    tc->setMiscReg(MISCREG_DR2, 0);
208    tc->setMiscReg(MISCREG_DR3, 0);
209
210    tc->setMiscReg(MISCREG_DR6, 0x00000000ffff0ff0ULL);
211    tc->setMiscReg(MISCREG_DR7, 0x0000000000000400ULL);
212
213    tc->setMiscReg(MISCREG_TSC, 0);
214    tc->setMiscReg(MISCREG_TSC_AUX, 0);
215
216    for (int i = 0; i < 4; i++) {
217        tc->setMiscReg(MISCREG_PERF_EVT_SEL(i), 0);
218        tc->setMiscReg(MISCREG_PERF_EVT_CTR(i), 0);
219    }
220
221    tc->setMiscReg(MISCREG_STAR, 0);
222    tc->setMiscReg(MISCREG_LSTAR, 0);
223    tc->setMiscReg(MISCREG_CSTAR, 0);
224
225    tc->setMiscReg(MISCREG_SF_MASK, 0);
226
227    tc->setMiscReg(MISCREG_KERNEL_GS_BASE, 0);
228
229    tc->setMiscReg(MISCREG_SYSENTER_CS, 0);
230    tc->setMiscReg(MISCREG_SYSENTER_ESP, 0);
231    tc->setMiscReg(MISCREG_SYSENTER_EIP, 0);
232
233    tc->setMiscReg(MISCREG_PAT, 0x0007040600070406ULL);
234
235    tc->setMiscReg(MISCREG_SYSCFG, 0x20601);
236
237    tc->setMiscReg(MISCREG_IORR_BASE0, 0);
238    tc->setMiscReg(MISCREG_IORR_BASE1, 0);
239
240    tc->setMiscReg(MISCREG_IORR_MASK0, 0);
241    tc->setMiscReg(MISCREG_IORR_MASK1, 0);
242
243    tc->setMiscReg(MISCREG_TOP_MEM, 0x4000000);
244    tc->setMiscReg(MISCREG_TOP_MEM2, 0x0);
245
246    tc->setMiscReg(MISCREG_DEBUG_CTL_MSR, 0);
247    tc->setMiscReg(MISCREG_LAST_BRANCH_FROM_IP, 0);
248    tc->setMiscReg(MISCREG_LAST_BRANCH_TO_IP, 0);
249    tc->setMiscReg(MISCREG_LAST_EXCEPTION_FROM_IP, 0);
250    tc->setMiscReg(MISCREG_LAST_EXCEPTION_TO_IP, 0);
251
252    // Invalidate the caches (this should already be done for us)
253
254    // TODO Turn on the APIC. This should be handled elsewhere but it isn't
255    // currently being handled at all.
256
257    LocalApicBase lApicBase = 0;
258    lApicBase.base = 0xFEE00000 >> 12;
259    lApicBase.enable = 1;
260    lApicBase.bsp = (cpuId == 0);
261    tc->setMiscReg(MISCREG_APIC_BASE, lApicBase);
262
263    Interrupts * interrupts = dynamic_cast<Interrupts *>(
264            tc->getCpuPtr()->getInterruptController());
265    assert(interrupts);
266
267    interrupts->setRegNoEffect(APIC_ID, cpuId << 24);
268
269    interrupts->setRegNoEffect(APIC_VERSION, (5 << 16) | 0x14);
270
271    interrupts->setClock(tc->getCpuPtr()->ticks(16));
272
273    // TODO Set the SMRAM base address (SMBASE) to 0x00030000
274
275    tc->setMiscReg(MISCREG_VM_CR, 0);
276    tc->setMiscReg(MISCREG_IGNNE, 0);
277    tc->setMiscReg(MISCREG_SMM_CTL, 0);
278    tc->setMiscReg(MISCREG_VM_HSAVE_PA, 0);
279}
280
281#endif
282
283void startupCPU(ThreadContext *tc, int cpuId)
284{
285#if FULL_SYSTEM
286    if (cpuId == 0) {
287        tc->activate(0);
288    } else {
289        // This is an application processor (AP). It should be initialized to
290        // look like only the BIOS POST has run on it and put then put it into
291        // a halted state.
292        tc->suspend(0);
293    }
294#else
295    tc->activate(0);
296#endif
297}
298
299} //namespace X86_ISA
300