| /* |
| * 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 2.1 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" |
| #include "exception.h" |
| #ifndef CONFIG_USER_ONLY |
| #include "hw/boards.h" |
| #endif |
| |
| #define TO_SPR(group, number) (((group) << 11) + (number)) |
| |
| static inline bool is_user(CPUOpenRISCState *env) |
| { |
| #ifdef CONFIG_USER_ONLY |
| return true; |
| #else |
| return (env->sr & SR_SM) == 0; |
| #endif |
| } |
| |
| void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb) |
| { |
| OpenRISCCPU *cpu = env_archcpu(env); |
| #ifndef CONFIG_USER_ONLY |
| CPUState *cs = env_cpu(env); |
| target_ulong mr; |
| int idx; |
| #endif |
| |
| /* Handle user accessible SPRs first. */ |
| switch (spr) { |
| case TO_SPR(0, 20): /* FPCSR */ |
| cpu_set_fpcsr(env, rb); |
| return; |
| } |
| |
| if (is_user(env)) { |
| raise_exception(cpu, EXCP_ILLEGAL); |
| } |
| |
| #ifndef CONFIG_USER_ONLY |
| switch (spr) { |
| case TO_SPR(0, 11): /* EVBAR */ |
| env->evbar = rb; |
| break; |
| |
| case TO_SPR(0, 16): /* NPC */ |
| cpu_restore_state(cs, GETPC()); |
| /* ??? Mirror or1ksim in not trashing delayed branch state |
| when "jumping" to the current instruction. */ |
| if (env->pc != rb) { |
| env->pc = rb; |
| env->dflag = 0; |
| } |
| cpu_loop_exit(cs); |
| break; |
| |
| case TO_SPR(0, 17): /* SR */ |
| cpu_set_sr(env, 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(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */ |
| idx = (spr - 1024); |
| env->shadow_gpr[idx / 32][idx % 32] = rb; |
| break; |
| |
| case TO_SPR(1, 512) ... TO_SPR(1, 512 + TLB_SIZE - 1): /* DTLBW0MR 0-127 */ |
| idx = spr - TO_SPR(1, 512); |
| mr = env->tlb.dtlb[idx].mr; |
| if (mr & 1) { |
| tlb_flush_page(cs, mr & TARGET_PAGE_MASK); |
| } |
| if (rb & 1) { |
| tlb_flush_page(cs, rb & TARGET_PAGE_MASK); |
| } |
| env->tlb.dtlb[idx].mr = rb; |
| break; |
| case TO_SPR(1, 640) ... TO_SPR(1, 640 + TLB_SIZE - 1): /* DTLBW0TR 0-127 */ |
| idx = spr - TO_SPR(1, 640); |
| env->tlb.dtlb[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 + TLB_SIZE - 1): /* ITLBW0MR 0-127 */ |
| idx = spr - TO_SPR(2, 512); |
| mr = env->tlb.itlb[idx].mr; |
| if (mr & 1) { |
| tlb_flush_page(cs, mr & TARGET_PAGE_MASK); |
| } |
| if (rb & 1) { |
| tlb_flush_page(cs, rb & TARGET_PAGE_MASK); |
| } |
| env->tlb.itlb[idx].mr = rb; |
| break; |
| case TO_SPR(2, 640) ... TO_SPR(2, 640 + TLB_SIZE - 1): /* ITLBW0TR 0-127 */ |
| idx = spr - TO_SPR(2, 640); |
| env->tlb.itlb[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(5, 1): /* MACLO */ |
| env->mac = deposit64(env->mac, 0, 32, rb); |
| break; |
| case TO_SPR(5, 2): /* MACHI */ |
| env->mac = deposit64(env->mac, 32, 32, rb); |
| break; |
| case TO_SPR(8, 0): /* PMR */ |
| env->pmr = rb; |
| if (env->pmr & PMR_DME || env->pmr & PMR_SME) { |
| cpu_restore_state(cs, GETPC()); |
| env->pc += 4; |
| cs->halted = 1; |
| raise_exception(cpu, EXCP_HALTED); |
| } |
| break; |
| case TO_SPR(9, 0): /* PICMR */ |
| env->picmr = rb; |
| qemu_mutex_lock_iothread(); |
| if (env->picsr & env->picmr) { |
| cpu_interrupt(cs, CPU_INTERRUPT_HARD); |
| } else { |
| cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); |
| } |
| qemu_mutex_unlock_iothread(); |
| break; |
| case TO_SPR(9, 2): /* PICSR */ |
| env->picsr &= ~rb; |
| break; |
| case TO_SPR(10, 0): /* TTMR */ |
| { |
| qemu_mutex_lock_iothread(); |
| 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); |
| qemu_mutex_unlock_iothread(); |
| } |
| break; |
| |
| case TO_SPR(10, 1): /* TTCR */ |
| qemu_mutex_lock_iothread(); |
| cpu_openrisc_count_set(cpu, rb); |
| cpu_openrisc_timer_update(cpu); |
| qemu_mutex_unlock_iothread(); |
| break; |
| } |
| #endif |
| } |
| |
| target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd, |
| target_ulong spr) |
| { |
| OpenRISCCPU *cpu = env_archcpu(env); |
| #ifndef CONFIG_USER_ONLY |
| uint64_t data[TARGET_INSN_START_WORDS]; |
| MachineState *ms = MACHINE(qdev_get_machine()); |
| CPUState *cs = env_cpu(env); |
| int idx; |
| #endif |
| |
| /* Handle user accessible SPRs first. */ |
| switch (spr) { |
| case TO_SPR(0, 20): /* FPCSR */ |
| return env->fpcsr; |
| } |
| |
| if (is_user(env)) { |
| raise_exception(cpu, EXCP_ILLEGAL); |
| } |
| |
| #ifndef CONFIG_USER_ONLY |
| switch (spr) { |
| case TO_SPR(0, 0): /* VR */ |
| return env->vr; |
| |
| case TO_SPR(0, 1): /* UPR */ |
| return env->upr; |
| |
| case TO_SPR(0, 2): /* CPUCFGR */ |
| return env->cpucfgr; |
| |
| case TO_SPR(0, 3): /* DMMUCFGR */ |
| return env->dmmucfgr; |
| |
| case TO_SPR(0, 4): /* IMMUCFGR */ |
| return env->immucfgr; |
| |
| case TO_SPR(0, 9): /* VR2 */ |
| return env->vr2; |
| |
| case TO_SPR(0, 10): /* AVR */ |
| return env->avr; |
| |
| case TO_SPR(0, 11): /* EVBAR */ |
| return env->evbar; |
| |
| case TO_SPR(0, 16): /* NPC (equals PC) */ |
| if (cpu_unwind_state_data(cs, GETPC(), data)) { |
| return data[0]; |
| } |
| return env->pc; |
| |
| case TO_SPR(0, 17): /* SR */ |
| return cpu_get_sr(env); |
| |
| case TO_SPR(0, 18): /* PPC */ |
| if (cpu_unwind_state_data(cs, GETPC(), data)) { |
| if (data[1] & 2) { |
| return data[0] - 4; |
| } |
| } |
| 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(0, 128): /* COREID */ |
| return cpu->parent_obj.cpu_index; |
| |
| case TO_SPR(0, 129): /* NUMCORES */ |
| return ms->smp.max_cpus; |
| |
| case TO_SPR(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */ |
| idx = (spr - 1024); |
| return env->shadow_gpr[idx / 32][idx % 32]; |
| |
| case TO_SPR(1, 512) ... TO_SPR(1, 512 + TLB_SIZE - 1): /* DTLBW0MR 0-127 */ |
| idx = spr - TO_SPR(1, 512); |
| return env->tlb.dtlb[idx].mr; |
| |
| case TO_SPR(1, 640) ... TO_SPR(1, 640 + TLB_SIZE - 1): /* DTLBW0TR 0-127 */ |
| idx = spr - TO_SPR(1, 640); |
| return env->tlb.dtlb[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 + TLB_SIZE - 1): /* ITLBW0MR 0-127 */ |
| idx = spr - TO_SPR(2, 512); |
| return env->tlb.itlb[idx].mr; |
| |
| case TO_SPR(2, 640) ... TO_SPR(2, 640 + TLB_SIZE - 1): /* ITLBW0TR 0-127 */ |
| idx = spr - TO_SPR(2, 640); |
| return env->tlb.itlb[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(5, 1): /* MACLO */ |
| return (uint32_t)env->mac; |
| break; |
| case TO_SPR(5, 2): /* MACHI */ |
| return env->mac >> 32; |
| break; |
| |
| case TO_SPR(8, 0): /* PMR */ |
| return env->pmr; |
| |
| 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 */ |
| qemu_mutex_lock_iothread(); |
| cpu_openrisc_count_update(cpu); |
| qemu_mutex_unlock_iothread(); |
| return cpu_openrisc_count_get(cpu); |
| } |
| #endif |
| |
| /* for rd is passed in, if rd unchanged, just keep it back. */ |
| return rd; |
| } |
