2 * S390x DIAG instruction helper functions
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #include "qemu/osdep.h"
18 #include "exec/address-spaces.h"
19 #include "hw/watchdog/wdt_diag288.h"
20 #include "sysemu/cpus.h"
21 #include "hw/s390x/ipl.h"
22 #include "hw/s390x/s390-virtio-ccw.h"
24 int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3)
26 uint64_t func = env->regs[r1];
27 uint64_t timeout = env->regs[r1 + 1];
28 uint64_t action = env->regs[r3];
30 DIAG288State *diag288;
31 DIAG288Class *diag288_class;
33 if (r1 % 2 || action != 0) {
37 /* Timeout must be more than 15 seconds except for timer deletion */
38 if (func != WDT_DIAG288_CANCEL && timeout < 15) {
42 obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL);
47 diag288 = DIAG288(obj);
48 diag288_class = DIAG288_GET_CLASS(diag288);
49 return diag288_class->handle_timer(diag288, func, timeout);
52 #define DIAG_308_RC_OK 0x0001
53 #define DIAG_308_RC_NO_CONF 0x0102
54 #define DIAG_308_RC_INVALID 0x0402
56 #define DIAG308_RESET_MOD_CLR 0
57 #define DIAG308_RESET_LOAD_NORM 1
58 #define DIAG308_LOAD_CLEAR 3
59 #define DIAG308_LOAD_NORMAL_DUMP 4
61 #define DIAG308_STORE 6
63 static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr,
64 uintptr_t ra, bool write)
66 if ((r1 & 1) || (addr & ~TARGET_PAGE_MASK)) {
67 s390_program_interrupt(env, PGM_SPECIFICATION, ra);
70 if (!address_space_access_valid(&address_space_memory, addr,
71 sizeof(IplParameterBlock), write,
72 MEMTXATTRS_UNSPECIFIED)) {
73 s390_program_interrupt(env, PGM_ADDRESSING, ra);
79 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
81 CPUState *cs = env_cpu(env);
82 uint64_t addr = env->regs[r1];
83 uint64_t subcode = env->regs[r3];
84 IplParameterBlock *iplb;
86 if (env->psw.mask & PSW_MASK_PSTATE) {
87 s390_program_interrupt(env, PGM_PRIVILEGED, ra);
91 if (subcode & ~0x0ffffULL) {
92 s390_program_interrupt(env, PGM_SPECIFICATION, ra);
97 case DIAG308_RESET_MOD_CLR:
98 s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR);
100 case DIAG308_RESET_LOAD_NORM:
101 s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL);
103 case DIAG308_LOAD_CLEAR:
104 /* Well we still lack the clearing bit... */
105 s390_ipl_reset_request(cs, S390_RESET_REIPL);
108 if (diag308_parm_check(env, r1, addr, ra, false)) {
111 iplb = g_new0(IplParameterBlock, 1);
112 cpu_physical_memory_read(addr, iplb, sizeof(iplb->len));
113 if (!iplb_valid_len(iplb)) {
114 env->regs[r1 + 1] = DIAG_308_RC_INVALID;
118 cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len));
120 if (!iplb_valid(iplb)) {
121 env->regs[r1 + 1] = DIAG_308_RC_INVALID;
125 s390_ipl_update_diag308(iplb);
126 env->regs[r1 + 1] = DIAG_308_RC_OK;
131 if (diag308_parm_check(env, r1, addr, ra, true)) {
134 iplb = s390_ipl_get_iplb();
136 cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len));
137 env->regs[r1 + 1] = DIAG_308_RC_OK;
139 env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
143 s390_program_interrupt(env, PGM_SPECIFICATION, ra);