2 * OpenRISC system instructions helper routines
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 #include "qemu/osdep.h"
23 #include "exec/exec-all.h"
24 #include "exec/helper-proto.h"
25 #include "exception.h"
26 #include "sysemu/sysemu.h"
28 #define TO_SPR(group, number) (((group) << 11) + (number))
30 void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb)
32 #ifndef CONFIG_USER_ONLY
33 OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
34 CPUState *cs = CPU(cpu);
39 case TO_SPR(0, 0): /* VR */
43 case TO_SPR(0, 11): /* EVBAR */
47 case TO_SPR(0, 16): /* NPC */
48 cpu_restore_state(cs, GETPC(), true);
49 /* ??? Mirror or1ksim in not trashing delayed branch state
50 when "jumping" to the current instruction. */
58 case TO_SPR(0, 17): /* SR */
62 case TO_SPR(0, 18): /* PPC */
66 case TO_SPR(0, 32): /* EPCR */
70 case TO_SPR(0, 48): /* EEAR */
74 case TO_SPR(0, 64): /* ESR */
78 case TO_SPR(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */
80 env->shadow_gpr[idx / 32][idx % 32] = rb;
83 case TO_SPR(1, 512) ... TO_SPR(1, 512 + TLB_SIZE - 1): /* DTLBW0MR 0-127 */
84 idx = spr - TO_SPR(1, 512);
85 mr = env->tlb.dtlb[idx].mr;
87 tlb_flush_page(cs, mr & TARGET_PAGE_MASK);
90 tlb_flush_page(cs, rb & TARGET_PAGE_MASK);
92 env->tlb.dtlb[idx].mr = rb;
94 case TO_SPR(1, 640) ... TO_SPR(1, 640 + TLB_SIZE - 1): /* DTLBW0TR 0-127 */
95 idx = spr - TO_SPR(1, 640);
96 env->tlb.dtlb[idx].tr = rb;
98 case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */
99 case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */
100 case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
101 case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
102 case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
103 case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
106 case TO_SPR(2, 512) ... TO_SPR(2, 512 + TLB_SIZE - 1): /* ITLBW0MR 0-127 */
107 idx = spr - TO_SPR(2, 512);
108 mr = env->tlb.itlb[idx].mr;
110 tlb_flush_page(cs, mr & TARGET_PAGE_MASK);
113 tlb_flush_page(cs, rb & TARGET_PAGE_MASK);
115 env->tlb.itlb[idx].mr = rb;
117 case TO_SPR(2, 640) ... TO_SPR(2, 640 + TLB_SIZE - 1): /* ITLBW0TR 0-127 */
118 idx = spr - TO_SPR(2, 640);
119 env->tlb.itlb[idx].tr = rb;
121 case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
122 case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
123 case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
124 case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
125 case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
126 case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
129 case TO_SPR(5, 1): /* MACLO */
130 env->mac = deposit64(env->mac, 0, 32, rb);
132 case TO_SPR(5, 2): /* MACHI */
133 env->mac = deposit64(env->mac, 32, 32, rb);
135 case TO_SPR(8, 0): /* PMR */
137 if (env->pmr & PMR_DME || env->pmr & PMR_SME) {
138 cpu_restore_state(cs, GETPC(), true);
141 raise_exception(cpu, EXCP_HALTED);
144 case TO_SPR(9, 0): /* PICMR */
147 case TO_SPR(9, 2): /* PICSR */
150 case TO_SPR(10, 0): /* TTMR */
152 if ((env->ttmr & TTMR_M) ^ (rb & TTMR_M)) {
153 switch (rb & TTMR_M) {
155 cpu_openrisc_count_stop(cpu);
160 cpu_openrisc_count_start(cpu);
167 int ip = env->ttmr & TTMR_IP;
169 if (rb & TTMR_IP) { /* Keep IP bit. */
170 env->ttmr = (rb & ~TTMR_IP) | ip;
171 } else { /* Clear IP bit. */
172 env->ttmr = rb & ~TTMR_IP;
173 cs->interrupt_request &= ~CPU_INTERRUPT_TIMER;
176 cpu_openrisc_timer_update(cpu);
180 case TO_SPR(10, 1): /* TTCR */
181 cpu_openrisc_count_set(cpu, rb);
182 if (env->ttmr & TIMER_NONE) {
185 cpu_openrisc_timer_update(cpu);
193 target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
196 #ifndef CONFIG_USER_ONLY
197 OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
198 CPUState *cs = CPU(cpu);
202 case TO_SPR(0, 0): /* VR */
203 return env->vr & SPR_VR;
205 case TO_SPR(0, 1): /* UPR */
206 return env->upr; /* TT, DM, IM, UP present */
208 case TO_SPR(0, 2): /* CPUCFGR */
211 case TO_SPR(0, 3): /* DMMUCFGR */
212 return env->dmmucfgr; /* 1Way, 64 entries */
214 case TO_SPR(0, 4): /* IMMUCFGR */
215 return env->immucfgr;
217 case TO_SPR(0, 11): /* EVBAR */
220 case TO_SPR(0, 16): /* NPC (equals PC) */
221 cpu_restore_state(cs, GETPC(), false);
224 case TO_SPR(0, 17): /* SR */
225 return cpu_get_sr(env);
227 case TO_SPR(0, 18): /* PPC */
228 cpu_restore_state(cs, GETPC(), false);
231 case TO_SPR(0, 32): /* EPCR */
234 case TO_SPR(0, 48): /* EEAR */
237 case TO_SPR(0, 64): /* ESR */
240 case TO_SPR(0, 128): /* COREID */
241 return cpu->parent_obj.cpu_index;
243 case TO_SPR(0, 129): /* NUMCORES */
246 case TO_SPR(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */
248 return env->shadow_gpr[idx / 32][idx % 32];
250 case TO_SPR(1, 512) ... TO_SPR(1, 512 + TLB_SIZE - 1): /* DTLBW0MR 0-127 */
251 idx = spr - TO_SPR(1, 512);
252 return env->tlb.dtlb[idx].mr;
254 case TO_SPR(1, 640) ... TO_SPR(1, 640 + TLB_SIZE - 1): /* DTLBW0TR 0-127 */
255 idx = spr - TO_SPR(1, 640);
256 return env->tlb.dtlb[idx].tr;
258 case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */
259 case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */
260 case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
261 case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
262 case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
263 case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
266 case TO_SPR(2, 512) ... TO_SPR(2, 512 + TLB_SIZE - 1): /* ITLBW0MR 0-127 */
267 idx = spr - TO_SPR(2, 512);
268 return env->tlb.itlb[idx].mr;
270 case TO_SPR(2, 640) ... TO_SPR(2, 640 + TLB_SIZE - 1): /* ITLBW0TR 0-127 */
271 idx = spr - TO_SPR(2, 640);
272 return env->tlb.itlb[idx].tr;
274 case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
275 case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
276 case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
277 case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
278 case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
279 case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
282 case TO_SPR(5, 1): /* MACLO */
283 return (uint32_t)env->mac;
285 case TO_SPR(5, 2): /* MACHI */
286 return env->mac >> 32;
289 case TO_SPR(8, 0): /* PMR */
292 case TO_SPR(9, 0): /* PICMR */
295 case TO_SPR(9, 2): /* PICSR */
298 case TO_SPR(10, 0): /* TTMR */
301 case TO_SPR(10, 1): /* TTCR */
302 cpu_openrisc_count_update(cpu);
303 return cpu_openrisc_count_get(cpu);
310 /* for rd is passed in, if rd unchanged, just keep it back. */