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/helper-proto.h"
25 #define TO_SPR(group, number) (((group) << 11) + (number))
27 void HELPER(mtspr)(CPUOpenRISCState *env,
28 target_ulong ra, target_ulong rb, target_ulong offset)
30 #ifndef CONFIG_USER_ONLY
31 int spr = (ra | offset);
34 OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
35 CPUState *cs = CPU(cpu);
38 case TO_SPR(0, 0): /* VR */
42 case TO_SPR(0, 16): /* NPC */
46 case TO_SPR(0, 17): /* SR */
47 if ((env->sr & (SR_IME | SR_DME | SR_SM)) ^
48 (rb & (SR_IME | SR_DME | SR_SM))) {
52 env->sr |= SR_FO; /* FO is const equal to 1 */
53 if (env->sr & SR_DME) {
54 env->tlb->cpu_openrisc_map_address_data =
55 &cpu_openrisc_get_phys_data;
57 env->tlb->cpu_openrisc_map_address_data =
58 &cpu_openrisc_get_phys_nommu;
61 if (env->sr & SR_IME) {
62 env->tlb->cpu_openrisc_map_address_code =
63 &cpu_openrisc_get_phys_code;
65 env->tlb->cpu_openrisc_map_address_code =
66 &cpu_openrisc_get_phys_nommu;
70 case TO_SPR(0, 18): /* PPC */
74 case TO_SPR(0, 32): /* EPCR */
78 case TO_SPR(0, 48): /* EEAR */
82 case TO_SPR(0, 64): /* ESR */
85 case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */
86 idx = spr - TO_SPR(1, 512);
88 tlb_flush_page(cs, env->tlb->dtlb[0][idx].mr & TARGET_PAGE_MASK);
90 env->tlb->dtlb[0][idx].mr = rb;
93 case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */
94 idx = spr - TO_SPR(1, 640);
95 env->tlb->dtlb[0][idx].tr = rb;
97 case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */
98 case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */
99 case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
100 case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
101 case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
102 case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
104 case TO_SPR(2, 512) ... TO_SPR(2, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */
105 idx = spr - TO_SPR(2, 512);
107 tlb_flush_page(cs, env->tlb->itlb[0][idx].mr & TARGET_PAGE_MASK);
109 env->tlb->itlb[0][idx].mr = rb;
112 case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */
113 idx = spr - TO_SPR(2, 640);
114 env->tlb->itlb[0][idx].tr = rb;
116 case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
117 case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
118 case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
119 case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
120 case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
121 case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
123 case TO_SPR(9, 0): /* PICMR */
126 case TO_SPR(9, 2): /* PICSR */
129 case TO_SPR(10, 0): /* TTMR */
131 if ((env->ttmr & TTMR_M) ^ (rb & TTMR_M)) {
132 switch (rb & TTMR_M) {
134 cpu_openrisc_count_stop(cpu);
139 cpu_openrisc_count_start(cpu);
146 int ip = env->ttmr & TTMR_IP;
148 if (rb & TTMR_IP) { /* Keep IP bit. */
149 env->ttmr = (rb & ~TTMR_IP) | ip;
150 } else { /* Clear IP bit. */
151 env->ttmr = rb & ~TTMR_IP;
152 cs->interrupt_request &= ~CPU_INTERRUPT_TIMER;
155 cpu_openrisc_timer_update(cpu);
159 case TO_SPR(10, 1): /* TTCR */
161 if (env->ttmr & TIMER_NONE) {
164 cpu_openrisc_timer_update(cpu);
173 target_ulong HELPER(mfspr)(CPUOpenRISCState *env,
174 target_ulong rd, target_ulong ra, uint32_t offset)
176 #ifndef CONFIG_USER_ONLY
177 int spr = (ra | offset);
180 OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
183 case TO_SPR(0, 0): /* VR */
184 return env->vr & SPR_VR;
186 case TO_SPR(0, 1): /* UPR */
187 return env->upr; /* TT, DM, IM, UP present */
189 case TO_SPR(0, 2): /* CPUCFGR */
192 case TO_SPR(0, 3): /* DMMUCFGR */
193 return env->dmmucfgr; /* 1Way, 64 entries */
195 case TO_SPR(0, 4): /* IMMUCFGR */
196 return env->immucfgr;
198 case TO_SPR(0, 16): /* NPC */
201 case TO_SPR(0, 17): /* SR */
204 case TO_SPR(0, 18): /* PPC */
207 case TO_SPR(0, 32): /* EPCR */
210 case TO_SPR(0, 48): /* EEAR */
213 case TO_SPR(0, 64): /* ESR */
216 case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */
217 idx = spr - TO_SPR(1, 512);
218 return env->tlb->dtlb[0][idx].mr;
220 case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */
221 idx = spr - TO_SPR(1, 640);
222 return env->tlb->dtlb[0][idx].tr;
224 case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */
225 case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */
226 case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
227 case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
228 case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
229 case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
232 case TO_SPR(2, 512) ... TO_SPR(2, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */
233 idx = spr - TO_SPR(2, 512);
234 return env->tlb->itlb[0][idx].mr;
236 case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */
237 idx = spr - TO_SPR(2, 640);
238 return env->tlb->itlb[0][idx].tr;
240 case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
241 case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
242 case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
243 case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
244 case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
245 case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
248 case TO_SPR(9, 0): /* PICMR */
251 case TO_SPR(9, 2): /* PICSR */
254 case TO_SPR(10, 0): /* TTMR */
257 case TO_SPR(10, 1): /* TTCR */
258 cpu_openrisc_count_update(cpu);
266 /*If we later need to add tracepoints (or debug printfs) for the return
267 value, it may be useful to structure the code like this:
269 target_ulong ret = 0;
281 later something like trace_spr_read(ret);
285 /* for rd is passed in, if rd unchanged, just keep it back. */