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"
26 #include "sysemu/kvm.h"
27 #include "qemu/timer.h"
29 #include <linux/kvm.h>
32 #if !defined(CONFIG_USER_ONLY)
33 #include "exec/softmmu_exec.h"
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 kvm_s390_interrupt(cpu, KVM_S390_PROGRAM_INT, code);
91 CPUState *cs = CPU(cpu);
93 env->int_pgm_code = code;
94 env->int_pgm_ilen = ilen;
95 cs->exception_index = EXCP_PGM;
100 /* SCLP service call */
101 uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2)
103 int r = sclp_service_call(env, r1, r2);
105 program_interrupt(env, -r, 4);
111 #ifndef CONFIG_USER_ONLY
112 static void cpu_reset_all(void)
118 scc = S390_CPU_GET_CLASS(cs);
123 static void cpu_full_reset_all(void)
132 static int modified_clear_reset(S390CPU *cpu)
134 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
137 cpu_synchronize_all_states();
138 cpu_full_reset_all();
139 io_subsystem_reset();
140 scc->load_normal(CPU(cpu));
141 cpu_synchronize_all_post_reset();
146 static int load_normal_reset(S390CPU *cpu)
148 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
151 cpu_synchronize_all_states();
153 io_subsystem_reset();
154 scc->initial_cpu_reset(CPU(cpu));
155 scc->load_normal(CPU(cpu));
156 cpu_synchronize_all_post_reset();
161 #define DIAG_308_RC_NO_CONF 0x0102
162 #define DIAG_308_RC_INVALID 0x0402
163 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
165 uint64_t addr = env->regs[r1];
166 uint64_t subcode = env->regs[r3];
168 if (env->psw.mask & PSW_MASK_PSTATE) {
169 program_interrupt(env, PGM_PRIVILEGED, ILEN_LATER_INC);
173 if ((subcode & ~0x0ffffULL) || (subcode > 6)) {
174 program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
180 modified_clear_reset(s390_env_get_cpu(env));
183 load_normal_reset(s390_env_get_cpu(env));
186 if ((r1 & 1) || (addr & 0x0fffULL)) {
187 program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
190 env->regs[r1+1] = DIAG_308_RC_INVALID;
193 if ((r1 & 1) || (addr & 0x0fffULL)) {
194 program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
197 env->regs[r1+1] = DIAG_308_RC_NO_CONF;
200 hw_error("Unhandled diag308 subcode %" PRIx64, subcode);
207 uint64_t HELPER(diag)(CPUS390XState *env, uint32_t num, uint64_t mem,
215 r = s390_virtio_hypercall(env);
231 program_interrupt(env, PGM_OPERATION, ILEN_LATER_INC);
238 void HELPER(spx)(CPUS390XState *env, uint64_t a1)
240 uint32_t prefix = a1 & 0x7fffe000;
242 qemu_log("prefix: %#x\n", prefix);
243 tlb_flush_page(env, 0);
244 tlb_flush_page(env, TARGET_PAGE_SIZE);
247 static inline uint64_t clock_value(CPUS390XState *env)
251 time = env->tod_offset +
252 time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - env->tod_basetime);
258 uint64_t HELPER(stck)(CPUS390XState *env)
260 return clock_value(env);
263 /* Set Clock Comparator */
264 void HELPER(sckc)(CPUS390XState *env, uint64_t time)
270 /* difference between now and then */
271 time -= clock_value(env);
273 time = (time * 125) >> 9;
275 timer_mod(env->tod_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time);
278 /* Store Clock Comparator */
279 uint64_t HELPER(stckc)(CPUS390XState *env)
286 void HELPER(spt)(CPUS390XState *env, uint64_t time)
293 time = (time * 125) >> 9;
295 timer_mod(env->cpu_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time);
298 /* Store CPU Timer */
299 uint64_t HELPER(stpt)(CPUS390XState *env)
305 /* Store System Information */
306 uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0,
307 uint64_t r0, uint64_t r1)
312 if ((r0 & STSI_LEVEL_MASK) <= STSI_LEVEL_3 &&
313 ((r0 & STSI_R0_RESERVED_MASK) || (r1 & STSI_R1_RESERVED_MASK))) {
314 /* valid function code, invalid reserved bits */
315 program_interrupt(env, PGM_SPECIFICATION, 2);
318 sel1 = r0 & STSI_R0_SEL1_MASK;
319 sel2 = r1 & STSI_R1_SEL2_MASK;
321 /* XXX: spec exception if sysib is not 4k-aligned */
323 switch (r0 & STSI_LEVEL_MASK) {
325 if ((sel1 == 1) && (sel2 == 1)) {
326 /* Basic Machine Configuration */
327 struct sysib_111 sysib;
329 memset(&sysib, 0, sizeof(sysib));
330 ebcdic_put(sysib.manuf, "QEMU ", 16);
331 /* same as machine type number in STORE CPU ID */
332 ebcdic_put(sysib.type, "QEMU", 4);
333 /* same as model number in STORE CPU ID */
334 ebcdic_put(sysib.model, "QEMU ", 16);
335 ebcdic_put(sysib.sequence, "QEMU ", 16);
336 ebcdic_put(sysib.plant, "QEMU", 4);
337 cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1);
338 } else if ((sel1 == 2) && (sel2 == 1)) {
339 /* Basic Machine CPU */
340 struct sysib_121 sysib;
342 memset(&sysib, 0, sizeof(sysib));
343 /* XXX make different for different CPUs? */
344 ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
345 ebcdic_put(sysib.plant, "QEMU", 4);
346 stw_p(&sysib.cpu_addr, env->cpu_num);
347 cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1);
348 } else if ((sel1 == 2) && (sel2 == 2)) {
349 /* Basic Machine CPUs */
350 struct sysib_122 sysib;
352 memset(&sysib, 0, sizeof(sysib));
353 stl_p(&sysib.capability, 0x443afc29);
354 /* XXX change when SMP comes */
355 stw_p(&sysib.total_cpus, 1);
356 stw_p(&sysib.active_cpus, 1);
357 stw_p(&sysib.standby_cpus, 0);
358 stw_p(&sysib.reserved_cpus, 0);
359 cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1);
366 if ((sel1 == 2) && (sel2 == 1)) {
368 struct sysib_221 sysib;
370 memset(&sysib, 0, sizeof(sysib));
371 /* XXX make different for different CPUs? */
372 ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
373 ebcdic_put(sysib.plant, "QEMU", 4);
374 stw_p(&sysib.cpu_addr, env->cpu_num);
375 stw_p(&sysib.cpu_id, 0);
376 cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1);
377 } else if ((sel1 == 2) && (sel2 == 2)) {
379 struct sysib_222 sysib;
381 memset(&sysib, 0, sizeof(sysib));
382 stw_p(&sysib.lpar_num, 0);
384 /* XXX change when SMP comes */
385 stw_p(&sysib.total_cpus, 1);
386 stw_p(&sysib.conf_cpus, 1);
387 stw_p(&sysib.standby_cpus, 0);
388 stw_p(&sysib.reserved_cpus, 0);
389 ebcdic_put(sysib.name, "QEMU ", 8);
390 stl_p(&sysib.caf, 1000);
391 stw_p(&sysib.dedicated_cpus, 0);
392 stw_p(&sysib.shared_cpus, 0);
393 cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1);
401 if ((sel1 == 2) && (sel2 == 2)) {
403 struct sysib_322 sysib;
405 memset(&sysib, 0, sizeof(sysib));
407 /* XXX change when SMP comes */
408 stw_p(&sysib.vm[0].total_cpus, 1);
409 stw_p(&sysib.vm[0].conf_cpus, 1);
410 stw_p(&sysib.vm[0].standby_cpus, 0);
411 stw_p(&sysib.vm[0].reserved_cpus, 0);
412 ebcdic_put(sysib.vm[0].name, "KVMguest", 8);
413 stl_p(&sysib.vm[0].caf, 1000);
414 ebcdic_put(sysib.vm[0].cpi, "KVM/Linux ", 16);
415 cpu_physical_memory_rw(a0, (uint8_t *)&sysib, sizeof(sysib), 1);
421 case STSI_LEVEL_CURRENT:
422 env->regs[0] = STSI_LEVEL_3;
432 uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1,
437 HELPER_LOG("%s: %016" PRIx64 " %08x %016" PRIx64 "\n",
438 __func__, order_code, r1, cpu_addr);
440 /* Remember: Use "R1 or R1 + 1, whichever is the odd-numbered register"
441 as parameter (input). Status (output) is always R1. */
443 switch (order_code) {
448 /* enumerate CPU status */
450 /* XXX implement when SMP comes */
453 env->regs[r1] &= 0xffffffff00000000ULL;
456 #if !defined(CONFIG_USER_ONLY)
458 qemu_system_reset_request();
459 cpu_loop_exit(CPU(s390_env_get_cpu(env)));
462 qemu_system_shutdown_request();
463 cpu_loop_exit(CPU(s390_env_get_cpu(env)));
468 fprintf(stderr, "XXX unknown sigp: 0x%" PRIx64 "\n", order_code);