1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 * Ali Saidi
39 */
40
41#include "arch/arm/isa.hh"
42#include "debug/Arm.hh"
43#include "debug/MiscRegs.hh"
44#include "sim/faults.hh"
45#include "sim/stat_control.hh"
46#include "sim/system.hh"
47
48namespace ArmISA
49{
50
51void
52ISA::clear()
53{
54 SCTLR sctlr_rst = miscRegs[MISCREG_SCTLR_RST];
55 uint32_t midr = miscRegs[MISCREG_MIDR];
56 memset(miscRegs, 0, sizeof(miscRegs));
57 CPSR cpsr = 0;
58 cpsr.mode = MODE_USER;
59 miscRegs[MISCREG_CPSR] = cpsr;
60 updateRegMap(cpsr);
61
62 SCTLR sctlr = 0;
63 sctlr.te = (bool)sctlr_rst.te;
64 sctlr.nmfi = (bool)sctlr_rst.nmfi;
65 sctlr.v = (bool)sctlr_rst.v;
66 sctlr.u = 1;
67 sctlr.xp = 1;
68 sctlr.rao2 = 1;
69 sctlr.rao3 = 1;
70 sctlr.rao4 = 1;
71 miscRegs[MISCREG_SCTLR] = sctlr;
72 miscRegs[MISCREG_SCTLR_RST] = sctlr_rst;
73
74 // Preserve MIDR accross reset
75 miscRegs[MISCREG_MIDR] = midr;
76
77 /* Start with an event in the mailbox */
78 miscRegs[MISCREG_SEV_MAILBOX] = 1;
79
80 // Separate Instruction and Data TLBs.
81 miscRegs[MISCREG_TLBTR] = 1;
82
83 MVFR0 mvfr0 = 0;
84 mvfr0.advSimdRegisters = 2;
85 mvfr0.singlePrecision = 2;
86 mvfr0.doublePrecision = 2;
87 mvfr0.vfpExceptionTrapping = 0;
88 mvfr0.divide = 1;
89 mvfr0.squareRoot = 1;
90 mvfr0.shortVectors = 1;
91 mvfr0.roundingModes = 1;
92 miscRegs[MISCREG_MVFR0] = mvfr0;
93
94 MVFR1 mvfr1 = 0;
95 mvfr1.flushToZero = 1;
96 mvfr1.defaultNaN = 1;
97 mvfr1.advSimdLoadStore = 1;
98 mvfr1.advSimdInteger = 1;
99 mvfr1.advSimdSinglePrecision = 1;
100 mvfr1.advSimdHalfPrecision = 1;
101 mvfr1.vfpHalfPrecision = 1;
102 miscRegs[MISCREG_MVFR1] = mvfr1;
103
104 miscRegs[MISCREG_MPIDR] = 0;
105
106 // Reset values of PRRR and NMRR are implementation dependent
107
108 miscRegs[MISCREG_PRRR] =
109 (1 << 19) | // 19
110 (0 << 18) | // 18
111 (0 << 17) | // 17
112 (1 << 16) | // 16
113 (2 << 14) | // 15:14
114 (0 << 12) | // 13:12
115 (2 << 10) | // 11:10
116 (2 << 8) | // 9:8
117 (2 << 6) | // 7:6
118 (2 << 4) | // 5:4
119 (1 << 2) | // 3:2
120 0; // 1:0
121 miscRegs[MISCREG_NMRR] =
122 (1 << 30) | // 31:30
123 (0 << 26) | // 27:26
124 (0 << 24) | // 25:24
125 (3 << 22) | // 23:22
126 (2 << 20) | // 21:20
127 (0 << 18) | // 19:18
128 (0 << 16) | // 17:16
129 (1 << 14) | // 15:14
130 (0 << 12) | // 13:12
131 (2 << 10) | // 11:10
132 (0 << 8) | // 9:8
133 (3 << 6) | // 7:6
134 (2 << 4) | // 5:4
135 (0 << 2) | // 3:2
136 0; // 1:0
137
138 miscRegs[MISCREG_CPACR] = 0;
139 miscRegs[MISCREG_FPSID] = 0x410430A0;
140
141 // See section B4.1.84 of ARM ARM
142 // All values are latest for ARMv7-A profile
143 miscRegs[MISCREG_ID_ISAR0] = 0x02101111;
144 miscRegs[MISCREG_ID_ISAR1] = 0x02112111;
145 miscRegs[MISCREG_ID_ISAR2] = 0x21232141;
146 miscRegs[MISCREG_ID_ISAR3] = 0x01112131;
147 miscRegs[MISCREG_ID_ISAR4] = 0x10010142;
148 miscRegs[MISCREG_ID_ISAR5] = 0x00000000;
149
150 //XXX We need to initialize the rest of the state.
151}
152
153MiscReg
154ISA::readMiscRegNoEffect(int misc_reg)
155{
156 assert(misc_reg < NumMiscRegs);
157
158 int flat_idx;
159 if (misc_reg == MISCREG_SPSR)
160 flat_idx = flattenMiscIndex(misc_reg);
161 else
162 flat_idx = misc_reg;
163 MiscReg val = miscRegs[flat_idx];
164
165 DPRINTF(MiscRegs, "Reading From misc reg %d (%d) : %#x\n",
166 misc_reg, flat_idx, val);
167 return val;
168}
169
170
171MiscReg
172ISA::readMiscReg(int misc_reg, ThreadContext *tc)
173{
174 if (misc_reg == MISCREG_CPSR) {
175 CPSR cpsr = miscRegs[misc_reg];
176 PCState pc = tc->pcState();
177 cpsr.j = pc.jazelle() ? 1 : 0;
178 cpsr.t = pc.thumb() ? 1 : 0;
179 return cpsr;
180 }
181 if (misc_reg >= MISCREG_CP15_UNIMP_START)
182 panic("Unimplemented CP15 register %s read.\n",
183 miscRegName[misc_reg]);
184
185 switch (misc_reg) {
186 case MISCREG_MPIDR:
187 return tc->cpuId();
188 break;
189 case MISCREG_ID_MMFR0:
190 return 0x03; // VMSAv7 support
191 case MISCREG_ID_MMFR2:
192 return 0x01230000; // no HW access | WFI stalling | ISB and DSB
193 // | all TLB maintenance | no Harvard
194 case MISCREG_ID_MMFR3:
195 return 0xF0102211; // SuperSec | Coherent TLB | Bcast Maint |
196 // BP Maint | Cache Maint Set/way | Cache Maint MVA
197 case MISCREG_CLIDR:
198 warn_once("The clidr register always reports 0 caches.\n");
199 warn_once("clidr LoUIS field of 0b001 to match current "
200 "ARM implementations.\n");
201 return 0x00200000;
202 case MISCREG_CCSIDR:
203 warn_once("The ccsidr register isn't implemented and "
204 "always reads as 0.\n");
205 break;
206 case MISCREG_ID_PFR0:
207 warn("Returning thumbEE disabled for now since we don't support CP14"
208 "config registers and jumping to ThumbEE vectors\n");
209 return 0x0031; // !ThumbEE | !Jazelle | Thumb | ARM
210 case MISCREG_ID_PFR1:
211 warn("reading unimplmented register ID_PFR1");
212 return 0;
213 case MISCREG_CTR:
214 return 0x86468006; // V7, 64 byte cache line, load/exclusive is exact
215 case MISCREG_ACTLR:
216 warn("Not doing anything for miscreg ACTLR\n");
217 break;
218 case MISCREG_PMCR:
219 case MISCREG_PMCCNTR:
220 case MISCREG_PMSELR:
221 warn("Not doing anything for read to miscreg %s\n",
222 miscRegName[misc_reg]);
223 break;
224 case MISCREG_CPSR_Q:
225 panic("shouldn't be reading this register seperately\n");
226 case MISCREG_FPSCR_QC:
227 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrQcMask;
228 case MISCREG_FPSCR_EXC:
229 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrExcMask;
230 }
231 return readMiscRegNoEffect(misc_reg);
232}
233
234void
235ISA::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
236{
237 assert(misc_reg < NumMiscRegs);
238
239 int flat_idx;
240 if (misc_reg == MISCREG_SPSR)
241 flat_idx = flattenMiscIndex(misc_reg);
242 else
243 flat_idx = misc_reg;
244 miscRegs[flat_idx] = val;
245
246 DPRINTF(MiscRegs, "Writing to misc reg %d (%d) : %#x\n", misc_reg,
247 flat_idx, val);
248}
249
250void
251ISA::setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc)
252{
253
254 MiscReg newVal = val;
255 int x;
256 System *sys;
257 ThreadContext *oc;
258
259 if (misc_reg == MISCREG_CPSR) {
260 updateRegMap(val);
261
262
263 CPSR old_cpsr = miscRegs[MISCREG_CPSR];
264 int old_mode = old_cpsr.mode;
265 CPSR cpsr = val;
266 if (old_mode != cpsr.mode) {
267 tc->getITBPtr()->invalidateMiscReg();
268 tc->getDTBPtr()->invalidateMiscReg();
269 }
270
271 DPRINTF(Arm, "Updating CPSR from %#x to %#x f:%d i:%d a:%d mode:%#x\n",
272 miscRegs[misc_reg], cpsr, cpsr.f, cpsr.i, cpsr.a, cpsr.mode);
273 PCState pc = tc->pcState();
274 pc.nextThumb(cpsr.t);
275 pc.nextJazelle(cpsr.j);
276 tc->pcState(pc);
277 } else if (misc_reg >= MISCREG_CP15_UNIMP_START &&
278 misc_reg < MISCREG_CP15_END) {
279 panic("Unimplemented CP15 register %s wrote with %#x.\n",
280 miscRegName[misc_reg], val);
281 } else {
282 switch (misc_reg) {
283 case MISCREG_CPACR:
284 {
285
286 const uint32_t ones = (uint32_t)(-1);
287 CPACR cpacrMask = 0;
288 // Only cp10, cp11, and ase are implemented, nothing else should
289 // be writable
290 cpacrMask.cp10 = ones;
291 cpacrMask.cp11 = ones;
292 cpacrMask.asedis = ones;
293 newVal &= cpacrMask;
294 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n",
295 miscRegName[misc_reg], newVal);
296 }
297 break;
298 case MISCREG_CSSELR:
299 warn_once("The csselr register isn't implemented.\n");
300 return;
301 case MISCREG_FPSCR:
302 {
303 const uint32_t ones = (uint32_t)(-1);
304 FPSCR fpscrMask = 0;
305 fpscrMask.ioc = ones;
306 fpscrMask.dzc = ones;
307 fpscrMask.ofc = ones;
308 fpscrMask.ufc = ones;
309 fpscrMask.ixc = ones;
310 fpscrMask.idc = ones;
311 fpscrMask.len = ones;
312 fpscrMask.stride = ones;
313 fpscrMask.rMode = ones;
314 fpscrMask.fz = ones;
315 fpscrMask.dn = ones;
316 fpscrMask.ahp = ones;
317 fpscrMask.qc = ones;
318 fpscrMask.v = ones;
319 fpscrMask.c = ones;
320 fpscrMask.z = ones;
321 fpscrMask.n = ones;
322 newVal = (newVal & (uint32_t)fpscrMask) |
323 (miscRegs[MISCREG_FPSCR] & ~(uint32_t)fpscrMask);
324 }
325 break;
326 case MISCREG_CPSR_Q:
327 {
328 assert(!(newVal & ~CpsrMaskQ));
329 newVal = miscRegs[MISCREG_CPSR] | newVal;
330 misc_reg = MISCREG_CPSR;
331 }
332 break;
333 case MISCREG_FPSCR_QC:
334 {
335 newVal = miscRegs[MISCREG_FPSCR] | (newVal & FpscrQcMask);
336 misc_reg = MISCREG_FPSCR;
337 }
338 break;
339 case MISCREG_FPSCR_EXC:
340 {
341 newVal = miscRegs[MISCREG_FPSCR] | (newVal & FpscrExcMask);
342 misc_reg = MISCREG_FPSCR;
343 }
344 break;
345 case MISCREG_FPEXC:
346 {
347 // vfpv3 architecture, section B.6.1 of DDI04068
348 // bit 29 - valid only if fpexc[31] is 0
349 const uint32_t fpexcMask = 0x60000000;
350 newVal = (newVal & fpexcMask) |
351 (miscRegs[MISCREG_FPEXC] & ~fpexcMask);
352 }
353 break;
354 case MISCREG_SCTLR:
355 {
356 DPRINTF(MiscRegs, "Writing SCTLR: %#x\n", newVal);
357 SCTLR sctlr = miscRegs[MISCREG_SCTLR];
358 SCTLR new_sctlr = newVal;
359 new_sctlr.nmfi = (bool)sctlr.nmfi;
360 miscRegs[MISCREG_SCTLR] = (MiscReg)new_sctlr;
361 tc->getITBPtr()->invalidateMiscReg();
362 tc->getDTBPtr()->invalidateMiscReg();
| 1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 * Ali Saidi
39 */
40
41#include "arch/arm/isa.hh"
42#include "debug/Arm.hh"
43#include "debug/MiscRegs.hh"
44#include "sim/faults.hh"
45#include "sim/stat_control.hh"
46#include "sim/system.hh"
47
48namespace ArmISA
49{
50
51void
52ISA::clear()
53{
54 SCTLR sctlr_rst = miscRegs[MISCREG_SCTLR_RST];
55 uint32_t midr = miscRegs[MISCREG_MIDR];
56 memset(miscRegs, 0, sizeof(miscRegs));
57 CPSR cpsr = 0;
58 cpsr.mode = MODE_USER;
59 miscRegs[MISCREG_CPSR] = cpsr;
60 updateRegMap(cpsr);
61
62 SCTLR sctlr = 0;
63 sctlr.te = (bool)sctlr_rst.te;
64 sctlr.nmfi = (bool)sctlr_rst.nmfi;
65 sctlr.v = (bool)sctlr_rst.v;
66 sctlr.u = 1;
67 sctlr.xp = 1;
68 sctlr.rao2 = 1;
69 sctlr.rao3 = 1;
70 sctlr.rao4 = 1;
71 miscRegs[MISCREG_SCTLR] = sctlr;
72 miscRegs[MISCREG_SCTLR_RST] = sctlr_rst;
73
74 // Preserve MIDR accross reset
75 miscRegs[MISCREG_MIDR] = midr;
76
77 /* Start with an event in the mailbox */
78 miscRegs[MISCREG_SEV_MAILBOX] = 1;
79
80 // Separate Instruction and Data TLBs.
81 miscRegs[MISCREG_TLBTR] = 1;
82
83 MVFR0 mvfr0 = 0;
84 mvfr0.advSimdRegisters = 2;
85 mvfr0.singlePrecision = 2;
86 mvfr0.doublePrecision = 2;
87 mvfr0.vfpExceptionTrapping = 0;
88 mvfr0.divide = 1;
89 mvfr0.squareRoot = 1;
90 mvfr0.shortVectors = 1;
91 mvfr0.roundingModes = 1;
92 miscRegs[MISCREG_MVFR0] = mvfr0;
93
94 MVFR1 mvfr1 = 0;
95 mvfr1.flushToZero = 1;
96 mvfr1.defaultNaN = 1;
97 mvfr1.advSimdLoadStore = 1;
98 mvfr1.advSimdInteger = 1;
99 mvfr1.advSimdSinglePrecision = 1;
100 mvfr1.advSimdHalfPrecision = 1;
101 mvfr1.vfpHalfPrecision = 1;
102 miscRegs[MISCREG_MVFR1] = mvfr1;
103
104 miscRegs[MISCREG_MPIDR] = 0;
105
106 // Reset values of PRRR and NMRR are implementation dependent
107
108 miscRegs[MISCREG_PRRR] =
109 (1 << 19) | // 19
110 (0 << 18) | // 18
111 (0 << 17) | // 17
112 (1 << 16) | // 16
113 (2 << 14) | // 15:14
114 (0 << 12) | // 13:12
115 (2 << 10) | // 11:10
116 (2 << 8) | // 9:8
117 (2 << 6) | // 7:6
118 (2 << 4) | // 5:4
119 (1 << 2) | // 3:2
120 0; // 1:0
121 miscRegs[MISCREG_NMRR] =
122 (1 << 30) | // 31:30
123 (0 << 26) | // 27:26
124 (0 << 24) | // 25:24
125 (3 << 22) | // 23:22
126 (2 << 20) | // 21:20
127 (0 << 18) | // 19:18
128 (0 << 16) | // 17:16
129 (1 << 14) | // 15:14
130 (0 << 12) | // 13:12
131 (2 << 10) | // 11:10
132 (0 << 8) | // 9:8
133 (3 << 6) | // 7:6
134 (2 << 4) | // 5:4
135 (0 << 2) | // 3:2
136 0; // 1:0
137
138 miscRegs[MISCREG_CPACR] = 0;
139 miscRegs[MISCREG_FPSID] = 0x410430A0;
140
141 // See section B4.1.84 of ARM ARM
142 // All values are latest for ARMv7-A profile
143 miscRegs[MISCREG_ID_ISAR0] = 0x02101111;
144 miscRegs[MISCREG_ID_ISAR1] = 0x02112111;
145 miscRegs[MISCREG_ID_ISAR2] = 0x21232141;
146 miscRegs[MISCREG_ID_ISAR3] = 0x01112131;
147 miscRegs[MISCREG_ID_ISAR4] = 0x10010142;
148 miscRegs[MISCREG_ID_ISAR5] = 0x00000000;
149
150 //XXX We need to initialize the rest of the state.
151}
152
153MiscReg
154ISA::readMiscRegNoEffect(int misc_reg)
155{
156 assert(misc_reg < NumMiscRegs);
157
158 int flat_idx;
159 if (misc_reg == MISCREG_SPSR)
160 flat_idx = flattenMiscIndex(misc_reg);
161 else
162 flat_idx = misc_reg;
163 MiscReg val = miscRegs[flat_idx];
164
165 DPRINTF(MiscRegs, "Reading From misc reg %d (%d) : %#x\n",
166 misc_reg, flat_idx, val);
167 return val;
168}
169
170
171MiscReg
172ISA::readMiscReg(int misc_reg, ThreadContext *tc)
173{
174 if (misc_reg == MISCREG_CPSR) {
175 CPSR cpsr = miscRegs[misc_reg];
176 PCState pc = tc->pcState();
177 cpsr.j = pc.jazelle() ? 1 : 0;
178 cpsr.t = pc.thumb() ? 1 : 0;
179 return cpsr;
180 }
181 if (misc_reg >= MISCREG_CP15_UNIMP_START)
182 panic("Unimplemented CP15 register %s read.\n",
183 miscRegName[misc_reg]);
184
185 switch (misc_reg) {
186 case MISCREG_MPIDR:
187 return tc->cpuId();
188 break;
189 case MISCREG_ID_MMFR0:
190 return 0x03; // VMSAv7 support
191 case MISCREG_ID_MMFR2:
192 return 0x01230000; // no HW access | WFI stalling | ISB and DSB
193 // | all TLB maintenance | no Harvard
194 case MISCREG_ID_MMFR3:
195 return 0xF0102211; // SuperSec | Coherent TLB | Bcast Maint |
196 // BP Maint | Cache Maint Set/way | Cache Maint MVA
197 case MISCREG_CLIDR:
198 warn_once("The clidr register always reports 0 caches.\n");
199 warn_once("clidr LoUIS field of 0b001 to match current "
200 "ARM implementations.\n");
201 return 0x00200000;
202 case MISCREG_CCSIDR:
203 warn_once("The ccsidr register isn't implemented and "
204 "always reads as 0.\n");
205 break;
206 case MISCREG_ID_PFR0:
207 warn("Returning thumbEE disabled for now since we don't support CP14"
208 "config registers and jumping to ThumbEE vectors\n");
209 return 0x0031; // !ThumbEE | !Jazelle | Thumb | ARM
210 case MISCREG_ID_PFR1:
211 warn("reading unimplmented register ID_PFR1");
212 return 0;
213 case MISCREG_CTR:
214 return 0x86468006; // V7, 64 byte cache line, load/exclusive is exact
215 case MISCREG_ACTLR:
216 warn("Not doing anything for miscreg ACTLR\n");
217 break;
218 case MISCREG_PMCR:
219 case MISCREG_PMCCNTR:
220 case MISCREG_PMSELR:
221 warn("Not doing anything for read to miscreg %s\n",
222 miscRegName[misc_reg]);
223 break;
224 case MISCREG_CPSR_Q:
225 panic("shouldn't be reading this register seperately\n");
226 case MISCREG_FPSCR_QC:
227 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrQcMask;
228 case MISCREG_FPSCR_EXC:
229 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrExcMask;
230 }
231 return readMiscRegNoEffect(misc_reg);
232}
233
234void
235ISA::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
236{
237 assert(misc_reg < NumMiscRegs);
238
239 int flat_idx;
240 if (misc_reg == MISCREG_SPSR)
241 flat_idx = flattenMiscIndex(misc_reg);
242 else
243 flat_idx = misc_reg;
244 miscRegs[flat_idx] = val;
245
246 DPRINTF(MiscRegs, "Writing to misc reg %d (%d) : %#x\n", misc_reg,
247 flat_idx, val);
248}
249
250void
251ISA::setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc)
252{
253
254 MiscReg newVal = val;
255 int x;
256 System *sys;
257 ThreadContext *oc;
258
259 if (misc_reg == MISCREG_CPSR) {
260 updateRegMap(val);
261
262
263 CPSR old_cpsr = miscRegs[MISCREG_CPSR];
264 int old_mode = old_cpsr.mode;
265 CPSR cpsr = val;
266 if (old_mode != cpsr.mode) {
267 tc->getITBPtr()->invalidateMiscReg();
268 tc->getDTBPtr()->invalidateMiscReg();
269 }
270
271 DPRINTF(Arm, "Updating CPSR from %#x to %#x f:%d i:%d a:%d mode:%#x\n",
272 miscRegs[misc_reg], cpsr, cpsr.f, cpsr.i, cpsr.a, cpsr.mode);
273 PCState pc = tc->pcState();
274 pc.nextThumb(cpsr.t);
275 pc.nextJazelle(cpsr.j);
276 tc->pcState(pc);
277 } else if (misc_reg >= MISCREG_CP15_UNIMP_START &&
278 misc_reg < MISCREG_CP15_END) {
279 panic("Unimplemented CP15 register %s wrote with %#x.\n",
280 miscRegName[misc_reg], val);
281 } else {
282 switch (misc_reg) {
283 case MISCREG_CPACR:
284 {
285
286 const uint32_t ones = (uint32_t)(-1);
287 CPACR cpacrMask = 0;
288 // Only cp10, cp11, and ase are implemented, nothing else should
289 // be writable
290 cpacrMask.cp10 = ones;
291 cpacrMask.cp11 = ones;
292 cpacrMask.asedis = ones;
293 newVal &= cpacrMask;
294 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n",
295 miscRegName[misc_reg], newVal);
296 }
297 break;
298 case MISCREG_CSSELR:
299 warn_once("The csselr register isn't implemented.\n");
300 return;
301 case MISCREG_FPSCR:
302 {
303 const uint32_t ones = (uint32_t)(-1);
304 FPSCR fpscrMask = 0;
305 fpscrMask.ioc = ones;
306 fpscrMask.dzc = ones;
307 fpscrMask.ofc = ones;
308 fpscrMask.ufc = ones;
309 fpscrMask.ixc = ones;
310 fpscrMask.idc = ones;
311 fpscrMask.len = ones;
312 fpscrMask.stride = ones;
313 fpscrMask.rMode = ones;
314 fpscrMask.fz = ones;
315 fpscrMask.dn = ones;
316 fpscrMask.ahp = ones;
317 fpscrMask.qc = ones;
318 fpscrMask.v = ones;
319 fpscrMask.c = ones;
320 fpscrMask.z = ones;
321 fpscrMask.n = ones;
322 newVal = (newVal & (uint32_t)fpscrMask) |
323 (miscRegs[MISCREG_FPSCR] & ~(uint32_t)fpscrMask);
324 }
325 break;
326 case MISCREG_CPSR_Q:
327 {
328 assert(!(newVal & ~CpsrMaskQ));
329 newVal = miscRegs[MISCREG_CPSR] | newVal;
330 misc_reg = MISCREG_CPSR;
331 }
332 break;
333 case MISCREG_FPSCR_QC:
334 {
335 newVal = miscRegs[MISCREG_FPSCR] | (newVal & FpscrQcMask);
336 misc_reg = MISCREG_FPSCR;
337 }
338 break;
339 case MISCREG_FPSCR_EXC:
340 {
341 newVal = miscRegs[MISCREG_FPSCR] | (newVal & FpscrExcMask);
342 misc_reg = MISCREG_FPSCR;
343 }
344 break;
345 case MISCREG_FPEXC:
346 {
347 // vfpv3 architecture, section B.6.1 of DDI04068
348 // bit 29 - valid only if fpexc[31] is 0
349 const uint32_t fpexcMask = 0x60000000;
350 newVal = (newVal & fpexcMask) |
351 (miscRegs[MISCREG_FPEXC] & ~fpexcMask);
352 }
353 break;
354 case MISCREG_SCTLR:
355 {
356 DPRINTF(MiscRegs, "Writing SCTLR: %#x\n", newVal);
357 SCTLR sctlr = miscRegs[MISCREG_SCTLR];
358 SCTLR new_sctlr = newVal;
359 new_sctlr.nmfi = (bool)sctlr.nmfi;
360 miscRegs[MISCREG_SCTLR] = (MiscReg)new_sctlr;
361 tc->getITBPtr()->invalidateMiscReg();
362 tc->getDTBPtr()->invalidateMiscReg();
|
363 return;
364 }
365 case MISCREG_TLBTR:
366 case MISCREG_MVFR0:
367 case MISCREG_MVFR1:
368 case MISCREG_MPIDR:
369 case MISCREG_FPSID:
370 return;
371 case MISCREG_TLBIALLIS:
372 case MISCREG_TLBIALL:
373 sys = tc->getSystemPtr();
374 for (x = 0; x < sys->numContexts(); x++) {
375 oc = sys->getThreadContext(x);
376 assert(oc->getITBPtr() && oc->getDTBPtr());
377 oc->getITBPtr()->flushAll();
378 oc->getDTBPtr()->flushAll();
379 }
380 return;
381 case MISCREG_ITLBIALL:
382 tc->getITBPtr()->flushAll();
383 return;
384 case MISCREG_DTLBIALL:
385 tc->getDTBPtr()->flushAll();
386 return;
387 case MISCREG_TLBIMVAIS:
388 case MISCREG_TLBIMVA:
389 sys = tc->getSystemPtr();
390 for (x = 0; x < sys->numContexts(); x++) {
391 oc = sys->getThreadContext(x);
392 assert(oc->getITBPtr() && oc->getDTBPtr());
393 oc->getITBPtr()->flushMvaAsid(mbits(newVal, 31, 12),
394 bits(newVal, 7,0));
395 oc->getDTBPtr()->flushMvaAsid(mbits(newVal, 31, 12),
396 bits(newVal, 7,0));
397 }
398 return;
399 case MISCREG_TLBIASIDIS:
400 case MISCREG_TLBIASID:
401 sys = tc->getSystemPtr();
402 for (x = 0; x < sys->numContexts(); x++) {
403 oc = sys->getThreadContext(x);
404 assert(oc->getITBPtr() && oc->getDTBPtr());
405 oc->getITBPtr()->flushAsid(bits(newVal, 7,0));
406 oc->getDTBPtr()->flushAsid(bits(newVal, 7,0));
407 }
408 return;
409 case MISCREG_TLBIMVAAIS:
410 case MISCREG_TLBIMVAA:
411 sys = tc->getSystemPtr();
412 for (x = 0; x < sys->numContexts(); x++) {
413 oc = sys->getThreadContext(x);
414 assert(oc->getITBPtr() && oc->getDTBPtr());
415 oc->getITBPtr()->flushMva(mbits(newVal, 31,12));
416 oc->getDTBPtr()->flushMva(mbits(newVal, 31,12));
417 }
418 return;
419 case MISCREG_ITLBIMVA:
420 tc->getITBPtr()->flushMvaAsid(mbits(newVal, 31, 12),
421 bits(newVal, 7,0));
422 return;
423 case MISCREG_DTLBIMVA:
424 tc->getDTBPtr()->flushMvaAsid(mbits(newVal, 31, 12),
425 bits(newVal, 7,0));
426 return;
427 case MISCREG_ITLBIASID:
428 tc->getITBPtr()->flushAsid(bits(newVal, 7,0));
429 return;
430 case MISCREG_DTLBIASID:
431 tc->getDTBPtr()->flushAsid(bits(newVal, 7,0));
432 return;
433 case MISCREG_ACTLR:
434 warn("Not doing anything for write of miscreg ACTLR\n");
435 break;
436 case MISCREG_PMCR:
437 {
438 // Performance counters not implemented. Instead, interpret
439 // a reset command to this register to reset the simulator
440 // statistics.
441 // PMCR_E | PMCR_P | PMCR_C
442 const int ResetAndEnableCounters = 0x7;
443 if (newVal == ResetAndEnableCounters) {
444 inform("Resetting all simobject stats\n");
445 Stats::schedStatEvent(false, true);
446 break;
447 }
448 }
449 case MISCREG_PMCCNTR:
450 case MISCREG_PMSELR:
451 warn("Not doing anything for write to miscreg %s\n",
452 miscRegName[misc_reg]);
453 break;
454 case MISCREG_V2PCWPR:
455 case MISCREG_V2PCWPW:
456 case MISCREG_V2PCWUR:
457 case MISCREG_V2PCWUW:
458 case MISCREG_V2POWPR:
459 case MISCREG_V2POWPW:
460 case MISCREG_V2POWUR:
461 case MISCREG_V2POWUW:
462 {
463 RequestPtr req = new Request;
464 unsigned flags;
465 BaseTLB::Mode mode;
466 Fault fault;
467 switch(misc_reg) {
468 case MISCREG_V2PCWPR:
469 flags = TLB::MustBeOne;
470 mode = BaseTLB::Read;
471 break;
472 case MISCREG_V2PCWPW:
473 flags = TLB::MustBeOne;
474 mode = BaseTLB::Write;
475 break;
476 case MISCREG_V2PCWUR:
477 flags = TLB::MustBeOne | TLB::UserMode;
478 mode = BaseTLB::Read;
479 break;
480 case MISCREG_V2PCWUW:
481 flags = TLB::MustBeOne | TLB::UserMode;
482 mode = BaseTLB::Write;
483 break;
484 default:
485 panic("Security Extensions not implemented!");
486 }
487 warn("Translating via MISCREG in atomic mode! Fix Me!\n");
488 req->setVirt(0, val, 1, flags, tc->pcState().pc());
489 fault = tc->getDTBPtr()->translateAtomic(req, tc, mode);
490 if (fault == NoFault) {
491 miscRegs[MISCREG_PAR] =
492 (req->getPaddr() & 0xfffff000) |
493 (tc->getDTBPtr()->getAttr() );
494 DPRINTF(MiscRegs,
495 "MISCREG: Translated addr 0x%08x: PAR: 0x%08x\n",
496 val, miscRegs[MISCREG_PAR]);
497 }
498 else {
499 // Set fault bit and FSR
500 FSR fsr = miscRegs[MISCREG_DFSR];
501 miscRegs[MISCREG_PAR] =
502 (fsr.ext << 6) |
503 (fsr.fsHigh << 5) |
504 (fsr.fsLow << 1) |
505 0x1; // F bit
506 }
507 return;
508 }
509 case MISCREG_CONTEXTIDR:
510 case MISCREG_PRRR:
511 case MISCREG_NMRR:
512 case MISCREG_DACR:
513 tc->getITBPtr()->invalidateMiscReg();
514 tc->getDTBPtr()->invalidateMiscReg();
515 break;
516 case MISCREG_CPSR_MODE:
517 // This miscreg is used by copy*Regs to set the CPSR mode
518 // without updating other CPSR variables. It's used to
519 // make sure the register map is in such a state that we can
520 // see all of the registers for the copy.
521 updateRegMap(val);
522 return;
523 }
524 }
525 setMiscRegNoEffect(misc_reg, newVal);
526}
527
528}
| 380 return;
381 }
382 case MISCREG_TLBTR:
383 case MISCREG_MVFR0:
384 case MISCREG_MVFR1:
385 case MISCREG_MPIDR:
386 case MISCREG_FPSID:
387 return;
388 case MISCREG_TLBIALLIS:
389 case MISCREG_TLBIALL:
390 sys = tc->getSystemPtr();
391 for (x = 0; x < sys->numContexts(); x++) {
392 oc = sys->getThreadContext(x);
393 assert(oc->getITBPtr() && oc->getDTBPtr());
394 oc->getITBPtr()->flushAll();
395 oc->getDTBPtr()->flushAll();
396 }
397 return;
398 case MISCREG_ITLBIALL:
399 tc->getITBPtr()->flushAll();
400 return;
401 case MISCREG_DTLBIALL:
402 tc->getDTBPtr()->flushAll();
403 return;
404 case MISCREG_TLBIMVAIS:
405 case MISCREG_TLBIMVA:
406 sys = tc->getSystemPtr();
407 for (x = 0; x < sys->numContexts(); x++) {
408 oc = sys->getThreadContext(x);
409 assert(oc->getITBPtr() && oc->getDTBPtr());
410 oc->getITBPtr()->flushMvaAsid(mbits(newVal, 31, 12),
411 bits(newVal, 7,0));
412 oc->getDTBPtr()->flushMvaAsid(mbits(newVal, 31, 12),
413 bits(newVal, 7,0));
414 }
415 return;
416 case MISCREG_TLBIASIDIS:
417 case MISCREG_TLBIASID:
418 sys = tc->getSystemPtr();
419 for (x = 0; x < sys->numContexts(); x++) {
420 oc = sys->getThreadContext(x);
421 assert(oc->getITBPtr() && oc->getDTBPtr());
422 oc->getITBPtr()->flushAsid(bits(newVal, 7,0));
423 oc->getDTBPtr()->flushAsid(bits(newVal, 7,0));
424 }
425 return;
426 case MISCREG_TLBIMVAAIS:
427 case MISCREG_TLBIMVAA:
428 sys = tc->getSystemPtr();
429 for (x = 0; x < sys->numContexts(); x++) {
430 oc = sys->getThreadContext(x);
431 assert(oc->getITBPtr() && oc->getDTBPtr());
432 oc->getITBPtr()->flushMva(mbits(newVal, 31,12));
433 oc->getDTBPtr()->flushMva(mbits(newVal, 31,12));
434 }
435 return;
436 case MISCREG_ITLBIMVA:
437 tc->getITBPtr()->flushMvaAsid(mbits(newVal, 31, 12),
438 bits(newVal, 7,0));
439 return;
440 case MISCREG_DTLBIMVA:
441 tc->getDTBPtr()->flushMvaAsid(mbits(newVal, 31, 12),
442 bits(newVal, 7,0));
443 return;
444 case MISCREG_ITLBIASID:
445 tc->getITBPtr()->flushAsid(bits(newVal, 7,0));
446 return;
447 case MISCREG_DTLBIASID:
448 tc->getDTBPtr()->flushAsid(bits(newVal, 7,0));
449 return;
450 case MISCREG_ACTLR:
451 warn("Not doing anything for write of miscreg ACTLR\n");
452 break;
453 case MISCREG_PMCR:
454 {
455 // Performance counters not implemented. Instead, interpret
456 // a reset command to this register to reset the simulator
457 // statistics.
458 // PMCR_E | PMCR_P | PMCR_C
459 const int ResetAndEnableCounters = 0x7;
460 if (newVal == ResetAndEnableCounters) {
461 inform("Resetting all simobject stats\n");
462 Stats::schedStatEvent(false, true);
463 break;
464 }
465 }
466 case MISCREG_PMCCNTR:
467 case MISCREG_PMSELR:
468 warn("Not doing anything for write to miscreg %s\n",
469 miscRegName[misc_reg]);
470 break;
471 case MISCREG_V2PCWPR:
472 case MISCREG_V2PCWPW:
473 case MISCREG_V2PCWUR:
474 case MISCREG_V2PCWUW:
475 case MISCREG_V2POWPR:
476 case MISCREG_V2POWPW:
477 case MISCREG_V2POWUR:
478 case MISCREG_V2POWUW:
479 {
480 RequestPtr req = new Request;
481 unsigned flags;
482 BaseTLB::Mode mode;
483 Fault fault;
484 switch(misc_reg) {
485 case MISCREG_V2PCWPR:
486 flags = TLB::MustBeOne;
487 mode = BaseTLB::Read;
488 break;
489 case MISCREG_V2PCWPW:
490 flags = TLB::MustBeOne;
491 mode = BaseTLB::Write;
492 break;
493 case MISCREG_V2PCWUR:
494 flags = TLB::MustBeOne | TLB::UserMode;
495 mode = BaseTLB::Read;
496 break;
497 case MISCREG_V2PCWUW:
498 flags = TLB::MustBeOne | TLB::UserMode;
499 mode = BaseTLB::Write;
500 break;
501 default:
502 panic("Security Extensions not implemented!");
503 }
504 warn("Translating via MISCREG in atomic mode! Fix Me!\n");
505 req->setVirt(0, val, 1, flags, tc->pcState().pc());
506 fault = tc->getDTBPtr()->translateAtomic(req, tc, mode);
507 if (fault == NoFault) {
508 miscRegs[MISCREG_PAR] =
509 (req->getPaddr() & 0xfffff000) |
510 (tc->getDTBPtr()->getAttr() );
511 DPRINTF(MiscRegs,
512 "MISCREG: Translated addr 0x%08x: PAR: 0x%08x\n",
513 val, miscRegs[MISCREG_PAR]);
514 }
515 else {
516 // Set fault bit and FSR
517 FSR fsr = miscRegs[MISCREG_DFSR];
518 miscRegs[MISCREG_PAR] =
519 (fsr.ext << 6) |
520 (fsr.fsHigh << 5) |
521 (fsr.fsLow << 1) |
522 0x1; // F bit
523 }
524 return;
525 }
526 case MISCREG_CONTEXTIDR:
527 case MISCREG_PRRR:
528 case MISCREG_NMRR:
529 case MISCREG_DACR:
530 tc->getITBPtr()->invalidateMiscReg();
531 tc->getDTBPtr()->invalidateMiscReg();
532 break;
533 case MISCREG_CPSR_MODE:
534 // This miscreg is used by copy*Regs to set the CPSR mode
535 // without updating other CPSR variables. It's used to
536 // make sure the register map is in such a state that we can
537 // see all of the registers for the copy.
538 updateRegMap(val);
539 return;
540 }
541 }
542 setMiscRegNoEffect(misc_reg, newVal);
543}
544
545}
|