/* * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the Open Source and Linux Lab nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "qemu/osdep.h" #include "cpu.h" #include "exec/helper-proto.h" #include "exec/page-protection.h" #include "qemu/host-utils.h" #include "exec/exec-all.h" #include "qemu/atomic.h" #include "qemu/timer.h" #ifndef CONFIG_USER_ONLY void HELPER(update_ccount)(CPUXtensaState *env) { XtensaCPU *cpu = env_archcpu(env); uint64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); env->ccount_time = now; env->sregs[CCOUNT] = env->ccount_base + (uint32_t)clock_ns_to_ticks(cpu->clock, now - env->time_base); } void HELPER(wsr_ccount)(CPUXtensaState *env, uint32_t v) { int i; HELPER(update_ccount)(env); env->ccount_base += v - env->sregs[CCOUNT]; for (i = 0; i < env->config->nccompare; ++i) { HELPER(update_ccompare)(env, i); } } void HELPER(update_ccompare)(CPUXtensaState *env, uint32_t i) { XtensaCPU *cpu = env_archcpu(env); uint64_t dcc; qatomic_and(&env->sregs[INTSET], ~(1u << env->config->timerint[i])); HELPER(update_ccount)(env); dcc = (uint64_t)(env->sregs[CCOMPARE + i] - env->sregs[CCOUNT] - 1) + 1; timer_mod(env->ccompare[i].timer, env->ccount_time + clock_ticks_to_ns(cpu->clock, dcc)); env->yield_needed = 1; } /*! * Check vaddr accessibility/cache attributes and raise an exception if * specified by the ATOMCTL SR. * * Note: local memory exclusion is not implemented */ void HELPER(check_atomctl)(CPUXtensaState *env, uint32_t pc, uint32_t vaddr) { uint32_t paddr, page_size, access; uint32_t atomctl = env->sregs[ATOMCTL]; int rc = xtensa_get_physical_addr(env, true, vaddr, 1, xtensa_get_cring(env), &paddr, &page_size, &access); /* * s32c1i never causes LOAD_PROHIBITED_CAUSE exceptions, * see opcode description in the ISA */ if (rc == 0 && (access & (PAGE_READ | PAGE_WRITE)) != (PAGE_READ | PAGE_WRITE)) { rc = STORE_PROHIBITED_CAUSE; } if (rc) { HELPER(exception_cause_vaddr)(env, pc, rc, vaddr); } /* * When data cache is not configured use ATOMCTL bypass field. * See ISA, 4.3.12.4 The Atomic Operation Control Register (ATOMCTL) * under the Conditional Store Option. */ if (!xtensa_option_enabled(env->config, XTENSA_OPTION_DCACHE)) { access = PAGE_CACHE_BYPASS; } switch (access & PAGE_CACHE_MASK) { case PAGE_CACHE_WB: atomctl >>= 2; /* fall through */ case PAGE_CACHE_WT: atomctl >>= 2; /* fall through */ case PAGE_CACHE_BYPASS: if ((atomctl & 0x3) == 0) { HELPER(exception_cause_vaddr)(env, pc, LOAD_STORE_ERROR_CAUSE, vaddr); } break; case PAGE_CACHE_ISOLATE: HELPER(exception_cause_vaddr)(env, pc, LOAD_STORE_ERROR_CAUSE, vaddr); break; default: break; } } void HELPER(check_exclusive)(CPUXtensaState *env, uint32_t pc, uint32_t vaddr, uint32_t is_write) { uint32_t paddr, page_size, access; uint32_t atomctl = env->sregs[ATOMCTL]; int rc = xtensa_get_physical_addr(env, true, vaddr, is_write, xtensa_get_cring(env), &paddr, &page_size, &access); if (rc) { HELPER(exception_cause_vaddr)(env, pc, rc, vaddr); } /* When data cache is not configured use ATOMCTL bypass field. */ if (!xtensa_option_enabled(env->config, XTENSA_OPTION_DCACHE)) { access = PAGE_CACHE_BYPASS; } switch (access & PAGE_CACHE_MASK) { case PAGE_CACHE_WB: atomctl >>= 2; /* fall through */ case PAGE_CACHE_WT: atomctl >>= 2; /* fall through */ case PAGE_CACHE_BYPASS: if ((atomctl & 0x3) == 0) { HELPER(exception_cause_vaddr)(env, pc, EXCLUSIVE_ERROR_CAUSE, vaddr); } break; case PAGE_CACHE_ISOLATE: HELPER(exception_cause_vaddr)(env, pc, LOAD_STORE_ERROR_CAUSE, vaddr); break; default: break; } } void HELPER(wsr_memctl)(CPUXtensaState *env, uint32_t v) { if (xtensa_option_enabled(env->config, XTENSA_OPTION_ICACHE)) { if (extract32(v, MEMCTL_IUSEWAYS_SHIFT, MEMCTL_IUSEWAYS_LEN) > env->config->icache_ways) { deposit32(v, MEMCTL_IUSEWAYS_SHIFT, MEMCTL_IUSEWAYS_LEN, env->config->icache_ways); } } if (xtensa_option_enabled(env->config, XTENSA_OPTION_DCACHE)) { if (extract32(v, MEMCTL_DUSEWAYS_SHIFT, MEMCTL_DUSEWAYS_LEN) > env->config->dcache_ways) { deposit32(v, MEMCTL_DUSEWAYS_SHIFT, MEMCTL_DUSEWAYS_LEN, env->config->dcache_ways); } if (extract32(v, MEMCTL_DALLOCWAYS_SHIFT, MEMCTL_DALLOCWAYS_LEN) > env->config->dcache_ways) { deposit32(v, MEMCTL_DALLOCWAYS_SHIFT, MEMCTL_DALLOCWAYS_LEN, env->config->dcache_ways); } } env->sregs[MEMCTL] = v & env->config->memctl_mask; } #endif uint32_t HELPER(rer)(CPUXtensaState *env, uint32_t addr) { #ifndef CONFIG_USER_ONLY return address_space_ldl(env->address_space_er, addr, MEMTXATTRS_UNSPECIFIED, NULL); #else return 0; #endif } void HELPER(wer)(CPUXtensaState *env, uint32_t data, uint32_t addr) { #ifndef CONFIG_USER_ONLY address_space_stl(env->address_space_er, addr, data, MEMTXATTRS_UNSPECIFIED, NULL); #endif }