| /* |
| * OpenRISC system instructions helper routines |
| * |
| * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com> |
| * Zhizhou Zhang <etouzh@gmail.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "cpu.h" |
| #include "exec/exec-all.h" |
| #include "exec/helper-proto.h" |
| |
| #define TO_SPR(group, number) (((group) << 11) + (number)) |
| |
| void HELPER(mtspr)(CPUOpenRISCState *env, |
| target_ulong ra, target_ulong rb, target_ulong offset) |
| { |
| #ifndef CONFIG_USER_ONLY |
| int spr = (ra | offset); |
| int idx; |
| |
| OpenRISCCPU *cpu = openrisc_env_get_cpu(env); |
| CPUState *cs = CPU(cpu); |
| |
| switch (spr) { |
| case TO_SPR(0, 0): /* VR */ |
| env->vr = rb; |
| break; |
| |
| case TO_SPR(0, 16): /* NPC */ |
| env->npc = rb; |
| break; |
| |
| case TO_SPR(0, 17): /* SR */ |
| if ((env->sr & (SR_IME | SR_DME | SR_SM)) ^ |
| (rb & (SR_IME | SR_DME | SR_SM))) { |
| tlb_flush(cs, 1); |
| } |
| env->sr = rb; |
| env->sr |= SR_FO; /* FO is const equal to 1 */ |
| if (env->sr & SR_DME) { |
| env->tlb->cpu_openrisc_map_address_data = |
| &cpu_openrisc_get_phys_data; |
| } else { |
| env->tlb->cpu_openrisc_map_address_data = |
| &cpu_openrisc_get_phys_nommu; |
| } |
| |
| if (env->sr & SR_IME) { |
| env->tlb->cpu_openrisc_map_address_code = |
| &cpu_openrisc_get_phys_code; |
| } else { |
| env->tlb->cpu_openrisc_map_address_code = |
| &cpu_openrisc_get_phys_nommu; |
| } |
| break; |
| |
| case TO_SPR(0, 18): /* PPC */ |
| env->ppc = rb; |
| break; |
| |
| case TO_SPR(0, 32): /* EPCR */ |
| env->epcr = rb; |
| break; |
| |
| case TO_SPR(0, 48): /* EEAR */ |
| env->eear = rb; |
| break; |
| |
| case TO_SPR(0, 64): /* ESR */ |
| env->esr = rb; |
| break; |
| case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */ |
| idx = spr - TO_SPR(1, 512); |
| if (!(rb & 1)) { |
| tlb_flush_page(cs, env->tlb->dtlb[0][idx].mr & TARGET_PAGE_MASK); |
| } |
| env->tlb->dtlb[0][idx].mr = rb; |
| break; |
| |
| case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */ |
| idx = spr - TO_SPR(1, 640); |
| env->tlb->dtlb[0][idx].tr = rb; |
| break; |
| case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */ |
| case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */ |
| case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */ |
| case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */ |
| case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */ |
| case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */ |
| break; |
| case TO_SPR(2, 512) ... TO_SPR(2, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */ |
| idx = spr - TO_SPR(2, 512); |
| if (!(rb & 1)) { |
| tlb_flush_page(cs, env->tlb->itlb[0][idx].mr & TARGET_PAGE_MASK); |
| } |
| env->tlb->itlb[0][idx].mr = rb; |
| break; |
| |
| case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */ |
| idx = spr - TO_SPR(2, 640); |
| env->tlb->itlb[0][idx].tr = rb; |
| break; |
| case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */ |
| case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */ |
| case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */ |
| case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */ |
| case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */ |
| case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */ |
| break; |
| case TO_SPR(9, 0): /* PICMR */ |
| env->picmr |= rb; |
| break; |
| case TO_SPR(9, 2): /* PICSR */ |
| env->picsr &= ~rb; |
| break; |
| case TO_SPR(10, 0): /* TTMR */ |
| { |
| if ((env->ttmr & TTMR_M) ^ (rb & TTMR_M)) { |
| switch (rb & TTMR_M) { |
| case TIMER_NONE: |
| cpu_openrisc_count_stop(cpu); |
| break; |
| case TIMER_INTR: |
| case TIMER_SHOT: |
| case TIMER_CONT: |
| cpu_openrisc_count_start(cpu); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| int ip = env->ttmr & TTMR_IP; |
| |
| if (rb & TTMR_IP) { /* Keep IP bit. */ |
| env->ttmr = (rb & ~TTMR_IP) | ip; |
| } else { /* Clear IP bit. */ |
| env->ttmr = rb & ~TTMR_IP; |
| cs->interrupt_request &= ~CPU_INTERRUPT_TIMER; |
| } |
| |
| cpu_openrisc_timer_update(cpu); |
| } |
| break; |
| |
| case TO_SPR(10, 1): /* TTCR */ |
| env->ttcr = rb; |
| if (env->ttmr & TIMER_NONE) { |
| return; |
| } |
| cpu_openrisc_timer_update(cpu); |
| break; |
| default: |
| |
| break; |
| } |
| #endif |
| } |
| |
| target_ulong HELPER(mfspr)(CPUOpenRISCState *env, |
| target_ulong rd, target_ulong ra, uint32_t offset) |
| { |
| #ifndef CONFIG_USER_ONLY |
| int spr = (ra | offset); |
| int idx; |
| |
| OpenRISCCPU *cpu = openrisc_env_get_cpu(env); |
| |
| switch (spr) { |
| case TO_SPR(0, 0): /* VR */ |
| return env->vr & SPR_VR; |
| |
| case TO_SPR(0, 1): /* UPR */ |
| return env->upr; /* TT, DM, IM, UP present */ |
| |
| case TO_SPR(0, 2): /* CPUCFGR */ |
| return env->cpucfgr; |
| |
| case TO_SPR(0, 3): /* DMMUCFGR */ |
| return env->dmmucfgr; /* 1Way, 64 entries */ |
| |
| case TO_SPR(0, 4): /* IMMUCFGR */ |
| return env->immucfgr; |
| |
| case TO_SPR(0, 16): /* NPC */ |
| return env->npc; |
| |
| case TO_SPR(0, 17): /* SR */ |
| return env->sr; |
| |
| case TO_SPR(0, 18): /* PPC */ |
| return env->ppc; |
| |
| case TO_SPR(0, 32): /* EPCR */ |
| return env->epcr; |
| |
| case TO_SPR(0, 48): /* EEAR */ |
| return env->eear; |
| |
| case TO_SPR(0, 64): /* ESR */ |
| return env->esr; |
| |
| case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */ |
| idx = spr - TO_SPR(1, 512); |
| return env->tlb->dtlb[0][idx].mr; |
| |
| case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */ |
| idx = spr - TO_SPR(1, 640); |
| return env->tlb->dtlb[0][idx].tr; |
| |
| case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */ |
| case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */ |
| case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */ |
| case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */ |
| case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */ |
| case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */ |
| break; |
| |
| case TO_SPR(2, 512) ... TO_SPR(2, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */ |
| idx = spr - TO_SPR(2, 512); |
| return env->tlb->itlb[0][idx].mr; |
| |
| case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */ |
| idx = spr - TO_SPR(2, 640); |
| return env->tlb->itlb[0][idx].tr; |
| |
| case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */ |
| case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */ |
| case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */ |
| case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */ |
| case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */ |
| case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */ |
| break; |
| |
| case TO_SPR(9, 0): /* PICMR */ |
| return env->picmr; |
| |
| case TO_SPR(9, 2): /* PICSR */ |
| return env->picsr; |
| |
| case TO_SPR(10, 0): /* TTMR */ |
| return env->ttmr; |
| |
| case TO_SPR(10, 1): /* TTCR */ |
| cpu_openrisc_count_update(cpu); |
| return env->ttcr; |
| |
| default: |
| break; |
| } |
| #endif |
| |
| /*If we later need to add tracepoints (or debug printfs) for the return |
| value, it may be useful to structure the code like this: |
| |
| target_ulong ret = 0; |
| |
| switch() { |
| case x: |
| ret = y; |
| break; |
| case z: |
| ret = 42; |
| break; |
| ... |
| } |
| |
| later something like trace_spr_read(ret); |
| |
| return ret;*/ |
| |
| /* for rd is passed in, if rd unchanged, just keep it back. */ |
| return rd; |
| } |
