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"
26 #define TO_SPR(group, number) (((group) << 11) + (number))
28 void HELPER(mtspr)(CPUOpenRISCState *env,
29 target_ulong ra, target_ulong rb, target_ulong offset)
31 #ifndef CONFIG_USER_ONLY
32 int spr = (ra | offset);
35 OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
36 CPUState *cs = CPU(cpu);
39 case TO_SPR(0, 0): /* VR */
43 case TO_SPR(0, 16): /* NPC */
47 case TO_SPR(0, 17): /* SR */
48 if ((env->sr & (SR_IME | SR_DME | SR_SM)) ^
49 (rb & (SR_IME | SR_DME | SR_SM))) {
53 env->sr |= SR_FO; /* FO is const equal to 1 */
54 if (env->sr & SR_DME) {
55 env->tlb->cpu_openrisc_map_address_data =
56 &cpu_openrisc_get_phys_data;
58 env->tlb->cpu_openrisc_map_address_data =
59 &cpu_openrisc_get_phys_nommu;
62 if (env->sr & SR_IME) {
63 env->tlb->cpu_openrisc_map_address_code =
64 &cpu_openrisc_get_phys_code;
66 env->tlb->cpu_openrisc_map_address_code =
67 &cpu_openrisc_get_phys_nommu;
71 case TO_SPR(0, 18): /* PPC */
75 case TO_SPR(0, 32): /* EPCR */
79 case TO_SPR(0, 48): /* EEAR */
83 case TO_SPR(0, 64): /* ESR */
86 case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */
87 idx = spr - TO_SPR(1, 512);
89 tlb_flush_page(cs, env->tlb->dtlb[0][idx].mr & TARGET_PAGE_MASK);
91 env->tlb->dtlb[0][idx].mr = rb;
94 case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */
95 idx = spr - TO_SPR(1, 640);
96 env->tlb->dtlb[0][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 */
105 case TO_SPR(2, 512) ... TO_SPR(2, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */
106 idx = spr - TO_SPR(2, 512);
108 tlb_flush_page(cs, env->tlb->itlb[0][idx].mr & TARGET_PAGE_MASK);
110 env->tlb->itlb[0][idx].mr = rb;
113 case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */
114 idx = spr - TO_SPR(2, 640);
115 env->tlb->itlb[0][idx].tr = rb;
117 case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
118 case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
119 case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
120 case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
121 case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
122 case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
124 case TO_SPR(9, 0): /* PICMR */
127 case TO_SPR(9, 2): /* PICSR */
130 case TO_SPR(10, 0): /* TTMR */
132 if ((env->ttmr & TTMR_M) ^ (rb & TTMR_M)) {
133 switch (rb & TTMR_M) {
135 cpu_openrisc_count_stop(cpu);
140 cpu_openrisc_count_start(cpu);
147 int ip = env->ttmr & TTMR_IP;
149 if (rb & TTMR_IP) { /* Keep IP bit. */
150 env->ttmr = (rb & ~TTMR_IP) | ip;
151 } else { /* Clear IP bit. */
152 env->ttmr = rb & ~TTMR_IP;
153 cs->interrupt_request &= ~CPU_INTERRUPT_TIMER;
156 cpu_openrisc_timer_update(cpu);
160 case TO_SPR(10, 1): /* TTCR */
162 if (env->ttmr & TIMER_NONE) {
165 cpu_openrisc_timer_update(cpu);
174 target_ulong HELPER(mfspr)(CPUOpenRISCState *env,
175 target_ulong rd, target_ulong ra, uint32_t offset)
177 #ifndef CONFIG_USER_ONLY
178 int spr = (ra | offset);
181 OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
184 case TO_SPR(0, 0): /* VR */
185 return env->vr & SPR_VR;
187 case TO_SPR(0, 1): /* UPR */
188 return env->upr; /* TT, DM, IM, UP present */
190 case TO_SPR(0, 2): /* CPUCFGR */
193 case TO_SPR(0, 3): /* DMMUCFGR */
194 return env->dmmucfgr; /* 1Way, 64 entries */
196 case TO_SPR(0, 4): /* IMMUCFGR */
197 return env->immucfgr;
199 case TO_SPR(0, 16): /* NPC */
202 case TO_SPR(0, 17): /* SR */
205 case TO_SPR(0, 18): /* PPC */
208 case TO_SPR(0, 32): /* EPCR */
211 case TO_SPR(0, 48): /* EEAR */
214 case TO_SPR(0, 64): /* ESR */
217 case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */
218 idx = spr - TO_SPR(1, 512);
219 return env->tlb->dtlb[0][idx].mr;
221 case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */
222 idx = spr - TO_SPR(1, 640);
223 return env->tlb->dtlb[0][idx].tr;
225 case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */
226 case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */
227 case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
228 case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
229 case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
230 case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
233 case TO_SPR(2, 512) ... TO_SPR(2, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */
234 idx = spr - TO_SPR(2, 512);
235 return env->tlb->itlb[0][idx].mr;
237 case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */
238 idx = spr - TO_SPR(2, 640);
239 return env->tlb->itlb[0][idx].tr;
241 case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
242 case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
243 case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
244 case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
245 case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
246 case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
249 case TO_SPR(9, 0): /* PICMR */
252 case TO_SPR(9, 2): /* PICSR */
255 case TO_SPR(10, 0): /* TTMR */
258 case TO_SPR(10, 1): /* TTCR */
259 cpu_openrisc_count_update(cpu);
267 /*If we later need to add tracepoints (or debug printfs) for the return
268 value, it may be useful to structure the code like this:
270 target_ulong ret = 0;
282 later something like trace_spr_read(ret);
286 /* for rd is passed in, if rd unchanged, just keep it back. */