2 * S/390 misc helper routines
4 * Copyright (c) 2009 Ulrich Hecht
5 * Copyright (c) 2009 Alexander Graf
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/>.
22 #include "exec/memory.h"
23 #include "qemu/host-utils.h"
24 #include "exec/helper-proto.h"
26 #include "sysemu/kvm.h"
27 #include "qemu/timer.h"
29 #include <linux/kvm.h>
31 #include "exec/cpu_ldst.h"
33 #if !defined(CONFIG_USER_ONLY)
34 #include "sysemu/cpus.h"
35 #include "sysemu/sysemu.h"
36 #include "hw/s390x/ebcdic.h"
39 /* #define DEBUG_HELPER */
41 #define HELPER_LOG(x...) qemu_log(x)
43 #define HELPER_LOG(x...)
46 /* Raise an exception dynamically from a helper function. */
47 void QEMU_NORETURN runtime_exception(CPUS390XState *env, int excp,
50 CPUState *cs = CPU(s390_env_get_cpu(env));
53 cs->exception_index = EXCP_PGM;
54 env->int_pgm_code = excp;
56 /* Use the (ultimate) callers address to find the insn that trapped. */
57 cpu_restore_state(cs, retaddr);
59 /* Advance past the insn. */
60 t = cpu_ldub_code(env, env->psw.addr);
61 env->int_pgm_ilen = t = get_ilen(t);
62 env->psw.addr += 2 * t;
67 /* Raise an exception statically from a TB. */
68 void HELPER(exception)(CPUS390XState *env, uint32_t excp)
70 CPUState *cs = CPU(s390_env_get_cpu(env));
72 HELPER_LOG("%s: exception %d\n", __func__, excp);
73 cs->exception_index = excp;
77 #ifndef CONFIG_USER_ONLY
79 void program_interrupt(CPUS390XState *env, uint32_t code, int ilen)
81 S390CPU *cpu = s390_env_get_cpu(env);
83 qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n",
88 struct kvm_s390_irq irq = {
89 .type = KVM_S390_PROGRAM_INT,
93 kvm_s390_vcpu_interrupt(cpu, &irq);
96 CPUState *cs = CPU(cpu);
98 env->int_pgm_code = code;
99 env->int_pgm_ilen = ilen;
100 cs->exception_index = EXCP_PGM;
105 /* SCLP service call */
106 uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2)
108 int r = sclp_service_call(env, r1, r2);
110 program_interrupt(env, -r, 4);
116 #ifndef CONFIG_USER_ONLY
117 static void cpu_reset_all(void)
123 scc = S390_CPU_GET_CLASS(cs);
128 static void cpu_full_reset_all(void)
137 static int modified_clear_reset(S390CPU *cpu)
139 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
142 cpu_synchronize_all_states();
143 cpu_full_reset_all();
145 io_subsystem_reset();
146 scc->load_normal(CPU(cpu));
147 cpu_synchronize_all_post_reset();
152 static int load_normal_reset(S390CPU *cpu)
154 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
157 cpu_synchronize_all_states();
160 io_subsystem_reset();
161 scc->initial_cpu_reset(CPU(cpu));
162 scc->load_normal(CPU(cpu));
163 cpu_synchronize_all_post_reset();
168 #define DIAG_308_RC_NO_CONF 0x0102
169 #define DIAG_308_RC_INVALID 0x0402
170 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
172 uint64_t addr = env->regs[r1];
173 uint64_t subcode = env->regs[r3];
175 if (env->psw.mask & PSW_MASK_PSTATE) {
176 program_interrupt(env, PGM_PRIVILEGED, ILEN_LATER_INC);
180 if ((subcode & ~0x0ffffULL) || (subcode > 6)) {
181 program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
187 modified_clear_reset(s390_env_get_cpu(env));
190 load_normal_reset(s390_env_get_cpu(env));
193 if ((r1 & 1) || (addr & 0x0fffULL)) {
194 program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
197 env->regs[r1+1] = DIAG_308_RC_INVALID;
200 if ((r1 & 1) || (addr & 0x0fffULL)) {
201 program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
204 env->regs[r1+1] = DIAG_308_RC_NO_CONF;
207 hw_error("Unhandled diag308 subcode %" PRIx64, subcode);
214 uint64_t HELPER(diag)(CPUS390XState *env, uint32_t num, uint64_t mem,
222 r = s390_virtio_hypercall(env);
238 program_interrupt(env, PGM_OPERATION, ILEN_LATER_INC);
245 void HELPER(spx)(CPUS390XState *env, uint64_t a1)
247 CPUState *cs = CPU(s390_env_get_cpu(env));
248 uint32_t prefix = a1 & 0x7fffe000;
251 qemu_log("prefix: %#x\n", prefix);
252 tlb_flush_page(cs, 0);
253 tlb_flush_page(cs, TARGET_PAGE_SIZE);
256 static inline uint64_t clock_value(CPUS390XState *env)
260 time = env->tod_offset +
261 time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - env->tod_basetime);
267 uint64_t HELPER(stck)(CPUS390XState *env)
269 return clock_value(env);
272 /* Set Clock Comparator */
273 void HELPER(sckc)(CPUS390XState *env, uint64_t time)
279 /* difference between now and then */
280 time -= clock_value(env);
282 time = (time * 125) >> 9;
284 timer_mod(env->tod_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time);
287 /* Store Clock Comparator */
288 uint64_t HELPER(stckc)(CPUS390XState *env)
295 void HELPER(spt)(CPUS390XState *env, uint64_t time)
302 time = (time * 125) >> 9;
304 timer_mod(env->cpu_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time);
307 /* Store CPU Timer */
308 uint64_t HELPER(stpt)(CPUS390XState *env)
314 /* Store System Information */
315 uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0,
316 uint64_t r0, uint64_t r1)
321 if ((r0 & STSI_LEVEL_MASK) <= STSI_LEVEL_3 &&
322 ((r0 & STSI_R0_RESERVED_MASK) || (r1 & STSI_R1_RESERVED_MASK))) {
323 /* valid function code, invalid reserved bits */
324 program_interrupt(env, PGM_SPECIFICATION, 2);
327 sel1 = r0 & STSI_R0_SEL1_MASK;
328 sel2 = r1 & STSI_R1_SEL2_MASK;
330 /* XXX: spec exception if sysib is not 4k-aligned */
332 switch (r0 & STSI_LEVEL_MASK) {
334 if ((sel1 == 1) && (sel2 == 1)) {
335 /* Basic Machine Configuration */
336 struct sysib_111 sysib;
338 memset(&sysib, 0, sizeof(sysib));
339 ebcdic_put(sysib.manuf, "QEMU ", 16);
340 /* same as machine type number in STORE CPU ID */
341 ebcdic_put(sysib.type, "QEMU", 4);
342 /* same as model number in STORE CPU ID */
343 ebcdic_put(sysib.model, "QEMU ", 16);
344 ebcdic_put(sysib.sequence, "QEMU ", 16);
345 ebcdic_put(sysib.plant, "QEMU", 4);
346 cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
347 } else if ((sel1 == 2) && (sel2 == 1)) {
348 /* Basic Machine CPU */
349 struct sysib_121 sysib;
351 memset(&sysib, 0, sizeof(sysib));
352 /* XXX make different for different CPUs? */
353 ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
354 ebcdic_put(sysib.plant, "QEMU", 4);
355 stw_p(&sysib.cpu_addr, env->cpu_num);
356 cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
357 } else if ((sel1 == 2) && (sel2 == 2)) {
358 /* Basic Machine CPUs */
359 struct sysib_122 sysib;
361 memset(&sysib, 0, sizeof(sysib));
362 stl_p(&sysib.capability, 0x443afc29);
363 /* XXX change when SMP comes */
364 stw_p(&sysib.total_cpus, 1);
365 stw_p(&sysib.active_cpus, 1);
366 stw_p(&sysib.standby_cpus, 0);
367 stw_p(&sysib.reserved_cpus, 0);
368 cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
375 if ((sel1 == 2) && (sel2 == 1)) {
377 struct sysib_221 sysib;
379 memset(&sysib, 0, sizeof(sysib));
380 /* XXX make different for different CPUs? */
381 ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
382 ebcdic_put(sysib.plant, "QEMU", 4);
383 stw_p(&sysib.cpu_addr, env->cpu_num);
384 stw_p(&sysib.cpu_id, 0);
385 cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
386 } else if ((sel1 == 2) && (sel2 == 2)) {
388 struct sysib_222 sysib;
390 memset(&sysib, 0, sizeof(sysib));
391 stw_p(&sysib.lpar_num, 0);
393 /* XXX change when SMP comes */
394 stw_p(&sysib.total_cpus, 1);
395 stw_p(&sysib.conf_cpus, 1);
396 stw_p(&sysib.standby_cpus, 0);
397 stw_p(&sysib.reserved_cpus, 0);
398 ebcdic_put(sysib.name, "QEMU ", 8);
399 stl_p(&sysib.caf, 1000);
400 stw_p(&sysib.dedicated_cpus, 0);
401 stw_p(&sysib.shared_cpus, 0);
402 cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
410 if ((sel1 == 2) && (sel2 == 2)) {
412 struct sysib_322 sysib;
414 memset(&sysib, 0, sizeof(sysib));
416 /* XXX change when SMP comes */
417 stw_p(&sysib.vm[0].total_cpus, 1);
418 stw_p(&sysib.vm[0].conf_cpus, 1);
419 stw_p(&sysib.vm[0].standby_cpus, 0);
420 stw_p(&sysib.vm[0].reserved_cpus, 0);
421 ebcdic_put(sysib.vm[0].name, "KVMguest", 8);
422 stl_p(&sysib.vm[0].caf, 1000);
423 ebcdic_put(sysib.vm[0].cpi, "KVM/Linux ", 16);
424 cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
430 case STSI_LEVEL_CURRENT:
431 env->regs[0] = STSI_LEVEL_3;
441 uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1,
446 HELPER_LOG("%s: %016" PRIx64 " %08x %016" PRIx64 "\n",
447 __func__, order_code, r1, cpu_addr);
449 /* Remember: Use "R1 or R1 + 1, whichever is the odd-numbered register"
450 as parameter (input). Status (output) is always R1. */
452 switch (order_code) {
457 /* enumerate CPU status */
459 /* XXX implement when SMP comes */
462 env->regs[r1] &= 0xffffffff00000000ULL;
465 #if !defined(CONFIG_USER_ONLY)
467 qemu_system_reset_request();
468 cpu_loop_exit(CPU(s390_env_get_cpu(env)));
471 qemu_system_shutdown_request();
472 cpu_loop_exit(CPU(s390_env_get_cpu(env)));
477 fprintf(stderr, "XXX unknown sigp: 0x%" PRIx64 "\n", order_code);