| /* |
| * S/390 misc helper routines |
| * |
| * Copyright (c) 2009 Ulrich Hecht |
| * Copyright (c) 2009 Alexander Graf |
| * |
| * 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 "cpu.h" |
| #include "exec/memory.h" |
| #include "qemu/host-utils.h" |
| #include "helper.h" |
| #include <string.h> |
| #include "sysemu/kvm.h" |
| #include "qemu/timer.h" |
| #ifdef CONFIG_KVM |
| #include <linux/kvm.h> |
| #endif |
| |
| #if !defined(CONFIG_USER_ONLY) |
| #include "exec/softmmu_exec.h" |
| #include "sysemu/cpus.h" |
| #include "sysemu/sysemu.h" |
| #include "hw/s390x/ebcdic.h" |
| #endif |
| |
| /* #define DEBUG_HELPER */ |
| #ifdef DEBUG_HELPER |
| #define HELPER_LOG(x...) qemu_log(x) |
| #else |
| #define HELPER_LOG(x...) |
| #endif |
| |
| /* Raise an exception dynamically from a helper function. */ |
| void QEMU_NORETURN runtime_exception(CPUS390XState *env, int excp, |
| uintptr_t retaddr) |
| { |
| int t; |
| |
| env->exception_index = EXCP_PGM; |
| env->int_pgm_code = excp; |
| |
| /* Use the (ultimate) callers address to find the insn that trapped. */ |
| cpu_restore_state(env, retaddr); |
| |
| /* Advance past the insn. */ |
| t = cpu_ldub_code(env, env->psw.addr); |
| env->int_pgm_ilen = t = get_ilen(t); |
| env->psw.addr += 2 * t; |
| |
| cpu_loop_exit(env); |
| } |
| |
| /* Raise an exception statically from a TB. */ |
| void HELPER(exception)(CPUS390XState *env, uint32_t excp) |
| { |
| HELPER_LOG("%s: exception %d\n", __func__, excp); |
| env->exception_index = excp; |
| cpu_loop_exit(env); |
| } |
| |
| #ifndef CONFIG_USER_ONLY |
| |
| void program_interrupt(CPUS390XState *env, uint32_t code, int ilen) |
| { |
| qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n", |
| env->psw.addr); |
| |
| if (kvm_enabled()) { |
| #ifdef CONFIG_KVM |
| kvm_s390_interrupt(s390_env_get_cpu(env), KVM_S390_PROGRAM_INT, code); |
| #endif |
| } else { |
| env->int_pgm_code = code; |
| env->int_pgm_ilen = ilen; |
| env->exception_index = EXCP_PGM; |
| cpu_loop_exit(env); |
| } |
| } |
| |
| /* SCLP service call */ |
| uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2) |
| { |
| int r = sclp_service_call(r1, r2); |
| if (r < 0) { |
| program_interrupt(env, -r, 4); |
| return 0; |
| } |
| return r; |
| } |
| |
| #ifndef CONFIG_USER_ONLY |
| static void cpu_reset_all(void) |
| { |
| CPUState *cs; |
| S390CPUClass *scc; |
| |
| CPU_FOREACH(cs) { |
| scc = S390_CPU_GET_CLASS(cs); |
| scc->cpu_reset(cs); |
| } |
| } |
| |
| static void cpu_full_reset_all(void) |
| { |
| CPUState *cpu; |
| |
| CPU_FOREACH(cpu) { |
| cpu_reset(cpu); |
| } |
| } |
| |
| static int modified_clear_reset(S390CPU *cpu) |
| { |
| S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); |
| |
| pause_all_vcpus(); |
| cpu_synchronize_all_states(); |
| cpu_full_reset_all(); |
| io_subsystem_reset(); |
| scc->load_normal(CPU(cpu)); |
| cpu_synchronize_all_post_reset(); |
| resume_all_vcpus(); |
| return 0; |
| } |
| |
| static int load_normal_reset(S390CPU *cpu) |
| { |
| S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); |
| |
| pause_all_vcpus(); |
| cpu_synchronize_all_states(); |
| cpu_reset_all(); |
| io_subsystem_reset(); |
| scc->initial_cpu_reset(CPU(cpu)); |
| scc->load_normal(CPU(cpu)); |
| cpu_synchronize_all_post_reset(); |
| resume_all_vcpus(); |
| return 0; |
| } |
| |
| #define DIAG_308_RC_NO_CONF 0x0102 |
| #define DIAG_308_RC_INVALID 0x0402 |
| void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3) |
| { |
| uint64_t addr = env->regs[r1]; |
| uint64_t subcode = env->regs[r3]; |
| |
| if (env->psw.mask & PSW_MASK_PSTATE) { |
| program_interrupt(env, PGM_PRIVILEGED, ILEN_LATER_INC); |
| return; |
| } |
| |
| if ((subcode & ~0x0ffffULL) || (subcode > 6)) { |
| program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC); |
| return; |
| } |
| |
| switch (subcode) { |
| case 0: |
| modified_clear_reset(s390_env_get_cpu(env)); |
| break; |
| case 1: |
| load_normal_reset(s390_env_get_cpu(env)); |
| break; |
| case 5: |
| if ((r1 & 1) || (addr & 0x0fffULL)) { |
| program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC); |
| return; |
| } |
| env->regs[r1+1] = DIAG_308_RC_INVALID; |
| return; |
| case 6: |
| if ((r1 & 1) || (addr & 0x0fffULL)) { |
| program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC); |
| return; |
| } |
| env->regs[r1+1] = DIAG_308_RC_NO_CONF; |
| return; |
| default: |
| hw_error("Unhandled diag308 subcode %" PRIx64, subcode); |
| break; |
| } |
| } |
| #endif |
| |
| /* DIAG */ |
| uint64_t HELPER(diag)(CPUS390XState *env, uint32_t num, uint64_t mem, |
| uint64_t code) |
| { |
| uint64_t r; |
| |
| switch (num) { |
| case 0x500: |
| /* KVM hypercall */ |
| r = s390_virtio_hypercall(env); |
| break; |
| case 0x44: |
| /* yield */ |
| r = 0; |
| break; |
| case 0x308: |
| /* ipl */ |
| r = 0; |
| break; |
| default: |
| r = -1; |
| break; |
| } |
| |
| if (r) { |
| program_interrupt(env, PGM_OPERATION, ILEN_LATER_INC); |
| } |
| |
| return r; |
| } |
| |
| /* Set Prefix */ |
| void HELPER(spx)(CPUS390XState *env, uint64_t a1) |
| { |
| uint32_t prefix = a1 & 0x7fffe000; |
| env->psa = prefix; |
| qemu_log("prefix: %#x\n", prefix); |
| tlb_flush_page(env, 0); |
| tlb_flush_page(env, TARGET_PAGE_SIZE); |
| } |
| |
| static inline uint64_t clock_value(CPUS390XState *env) |
| { |
| uint64_t time; |
| |
| time = env->tod_offset + |
| time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - env->tod_basetime); |
| |
| return time; |
| } |
| |
| /* Store Clock */ |
| uint64_t HELPER(stck)(CPUS390XState *env) |
| { |
| return clock_value(env); |
| } |
| |
| /* Set Clock Comparator */ |
| void HELPER(sckc)(CPUS390XState *env, uint64_t time) |
| { |
| if (time == -1ULL) { |
| return; |
| } |
| |
| /* difference between now and then */ |
| time -= clock_value(env); |
| /* nanoseconds */ |
| time = (time * 125) >> 9; |
| |
| timer_mod(env->tod_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time); |
| } |
| |
| /* Store Clock Comparator */ |
| uint64_t HELPER(stckc)(CPUS390XState *env) |
| { |
| /* XXX implement */ |
| return 0; |
| } |
| |
| /* Set CPU Timer */ |
| void HELPER(spt)(CPUS390XState *env, uint64_t time) |
| { |
| if (time == -1ULL) { |
| return; |
| } |
| |
| /* nanoseconds */ |
| time = (time * 125) >> 9; |
| |
| timer_mod(env->cpu_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time); |
| } |
| |
| /* Store CPU Timer */ |
| uint64_t HELPER(stpt)(CPUS390XState *env) |
| { |
| /* XXX implement */ |
| return 0; |
| } |
| |
| /* Store System Information */ |
| uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0, |
| uint64_t r0, uint64_t r1) |
| { |
| int cc = 0; |
| int sel1, sel2; |
| |
| if ((r0 & STSI_LEVEL_MASK) <= STSI_LEVEL_3 && |
| ((r0 & STSI_R0_RESERVED_MASK) || (r1 & STSI_R1_RESERVED_MASK))) { |
| /* valid function code, invalid reserved bits */ |
| program_interrupt(env, PGM_SPECIFICATION, 2); |
| } |
| |
| sel1 = r0 & STSI_R0_SEL1_MASK; |
| sel2 = r1 & STSI_R1_SEL2_MASK; |
| |
| /* XXX: spec exception if sysib is not 4k-aligned */ |
| |
| switch (r0 & STSI_LEVEL_MASK) { |
| case STSI_LEVEL_1: |
| if ((sel1 == 1) && (sel2 == 1)) { |
| /* Basic Machine Configuration */ |
| struct sysib_111 sysib; |
| |
| memset(&sysib, 0, sizeof(sysib)); |
| ebcdic_put(sysib.manuf, "QEMU ", 16); |
| /* same as machine type number in STORE CPU ID */ |
| ebcdic_put(sysib.type, "QEMU", 4); |
| /* same as model number in STORE CPU ID */ |
| ebcdic_put(sysib.model, "QEMU ", 16); |
| ebcdic_put(sysib.sequence, "QEMU ", 16); |
| ebcdic_put(sysib.plant, "QEMU", 4); |
| cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1); |
| } else if ((sel1 == 2) && (sel2 == 1)) { |
| /* Basic Machine CPU */ |
| struct sysib_121 sysib; |
| |
| memset(&sysib, 0, sizeof(sysib)); |
| /* XXX make different for different CPUs? */ |
| ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16); |
| ebcdic_put(sysib.plant, "QEMU", 4); |
| stw_p(&sysib.cpu_addr, env->cpu_num); |
| cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1); |
| } else if ((sel1 == 2) && (sel2 == 2)) { |
| /* Basic Machine CPUs */ |
| struct sysib_122 sysib; |
| |
| memset(&sysib, 0, sizeof(sysib)); |
| stl_p(&sysib.capability, 0x443afc29); |
| /* XXX change when SMP comes */ |
| stw_p(&sysib.total_cpus, 1); |
| stw_p(&sysib.active_cpus, 1); |
| stw_p(&sysib.standby_cpus, 0); |
| stw_p(&sysib.reserved_cpus, 0); |
| cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1); |
| } else { |
| cc = 3; |
| } |
| break; |
| case STSI_LEVEL_2: |
| { |
| if ((sel1 == 2) && (sel2 == 1)) { |
| /* LPAR CPU */ |
| struct sysib_221 sysib; |
| |
| memset(&sysib, 0, sizeof(sysib)); |
| /* XXX make different for different CPUs? */ |
| ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16); |
| ebcdic_put(sysib.plant, "QEMU", 4); |
| stw_p(&sysib.cpu_addr, env->cpu_num); |
| stw_p(&sysib.cpu_id, 0); |
| cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1); |
| } else if ((sel1 == 2) && (sel2 == 2)) { |
| /* LPAR CPUs */ |
| struct sysib_222 sysib; |
| |
| memset(&sysib, 0, sizeof(sysib)); |
| stw_p(&sysib.lpar_num, 0); |
| sysib.lcpuc = 0; |
| /* XXX change when SMP comes */ |
| stw_p(&sysib.total_cpus, 1); |
| stw_p(&sysib.conf_cpus, 1); |
| stw_p(&sysib.standby_cpus, 0); |
| stw_p(&sysib.reserved_cpus, 0); |
| ebcdic_put(sysib.name, "QEMU ", 8); |
| stl_p(&sysib.caf, 1000); |
| stw_p(&sysib.dedicated_cpus, 0); |
| stw_p(&sysib.shared_cpus, 0); |
| cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1); |
| } else { |
| cc = 3; |
| } |
| break; |
| } |
| case STSI_LEVEL_3: |
| { |
| if ((sel1 == 2) && (sel2 == 2)) { |
| /* VM CPUs */ |
| struct sysib_322 sysib; |
| |
| memset(&sysib, 0, sizeof(sysib)); |
| sysib.count = 1; |
| /* XXX change when SMP comes */ |
| stw_p(&sysib.vm[0].total_cpus, 1); |
| stw_p(&sysib.vm[0].conf_cpus, 1); |
| stw_p(&sysib.vm[0].standby_cpus, 0); |
| stw_p(&sysib.vm[0].reserved_cpus, 0); |
| ebcdic_put(sysib.vm[0].name, "KVMguest", 8); |
| stl_p(&sysib.vm[0].caf, 1000); |
| ebcdic_put(sysib.vm[0].cpi, "KVM/Linux ", 16); |
| cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1); |
| } else { |
| cc = 3; |
| } |
| break; |
| } |
| case STSI_LEVEL_CURRENT: |
| env->regs[0] = STSI_LEVEL_3; |
| break; |
| default: |
| cc = 3; |
| break; |
| } |
| |
| return cc; |
| } |
| |
| uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1, |
| uint64_t cpu_addr) |
| { |
| int cc = 0; |
| |
| HELPER_LOG("%s: %016" PRIx64 " %08x %016" PRIx64 "\n", |
| __func__, order_code, r1, cpu_addr); |
| |
| /* Remember: Use "R1 or R1 + 1, whichever is the odd-numbered register" |
| as parameter (input). Status (output) is always R1. */ |
| |
| switch (order_code) { |
| case SIGP_SET_ARCH: |
| /* switch arch */ |
| break; |
| case SIGP_SENSE: |
| /* enumerate CPU status */ |
| if (cpu_addr) { |
| /* XXX implement when SMP comes */ |
| return 3; |
| } |
| env->regs[r1] &= 0xffffffff00000000ULL; |
| cc = 1; |
| break; |
| #if !defined(CONFIG_USER_ONLY) |
| case SIGP_RESTART: |
| qemu_system_reset_request(); |
| cpu_loop_exit(env); |
| break; |
| case SIGP_STOP: |
| qemu_system_shutdown_request(); |
| cpu_loop_exit(env); |
| break; |
| #endif |
| default: |
| /* unknown sigp */ |
| fprintf(stderr, "XXX unknown sigp: 0x%" PRIx64 "\n", order_code); |
| cc = 3; |
| } |
| |
| return cc; |
| } |
| #endif |
