1 /* 2 * S390x DIAG instruction helper functions 3 * 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. 8 * 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. 13 */ 14 15 #include "qemu/osdep.h" 16 #include "cpu.h" 17 #include "internal.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" 23 24 int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3) 25 { 26 uint64_t func = env->regs[r1]; 27 uint64_t timeout = env->regs[r1 + 1]; 28 uint64_t action = env->regs[r3]; 29 Object *obj; 30 DIAG288State *diag288; 31 DIAG288Class *diag288_class; 32 33 if (r1 % 2 || action != 0) { 34 return -1; 35 } 36 37 /* Timeout must be more than 15 seconds except for timer deletion */ 38 if (func != WDT_DIAG288_CANCEL && timeout < 15) { 39 return -1; 40 } 41 42 obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL); 43 if (!obj) { 44 return -1; 45 } 46 47 diag288 = DIAG288(obj); 48 diag288_class = DIAG288_GET_CLASS(diag288); 49 return diag288_class->handle_timer(diag288, func, timeout); 50 } 51 52 #define DIAG_308_RC_OK 0x0001 53 #define DIAG_308_RC_NO_CONF 0x0102 54 #define DIAG_308_RC_INVALID 0x0402 55 56 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) 57 { 58 CPUState *cs = env_cpu(env); 59 uint64_t addr = env->regs[r1]; 60 uint64_t subcode = env->regs[r3]; 61 IplParameterBlock *iplb; 62 63 if (env->psw.mask & PSW_MASK_PSTATE) { 64 s390_program_interrupt(env, PGM_PRIVILEGED, ra); 65 return; 66 } 67 68 if ((subcode & ~0x0ffffULL) || (subcode > 6)) { 69 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 70 return; 71 } 72 73 switch (subcode) { 74 case 0: 75 s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR); 76 break; 77 case 1: 78 s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL); 79 break; 80 case 3: 81 s390_ipl_reset_request(cs, S390_RESET_REIPL); 82 break; 83 case 5: 84 if ((r1 & 1) || (addr & 0x0fffULL)) { 85 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 86 return; 87 } 88 if (!address_space_access_valid(&address_space_memory, addr, 89 sizeof(IplParameterBlock), false, 90 MEMTXATTRS_UNSPECIFIED)) { 91 s390_program_interrupt(env, PGM_ADDRESSING, ra); 92 return; 93 } 94 iplb = g_new0(IplParameterBlock, 1); 95 cpu_physical_memory_read(addr, iplb, sizeof(iplb->len)); 96 if (!iplb_valid_len(iplb)) { 97 env->regs[r1 + 1] = DIAG_308_RC_INVALID; 98 goto out; 99 } 100 101 cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len)); 102 103 if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb)) { 104 env->regs[r1 + 1] = DIAG_308_RC_INVALID; 105 goto out; 106 } 107 108 s390_ipl_update_diag308(iplb); 109 env->regs[r1 + 1] = DIAG_308_RC_OK; 110 out: 111 g_free(iplb); 112 return; 113 case 6: 114 if ((r1 & 1) || (addr & 0x0fffULL)) { 115 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 116 return; 117 } 118 if (!address_space_access_valid(&address_space_memory, addr, 119 sizeof(IplParameterBlock), true, 120 MEMTXATTRS_UNSPECIFIED)) { 121 s390_program_interrupt(env, PGM_ADDRESSING, ra); 122 return; 123 } 124 iplb = s390_ipl_get_iplb(); 125 if (iplb) { 126 cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); 127 env->regs[r1 + 1] = DIAG_308_RC_OK; 128 } else { 129 env->regs[r1 + 1] = DIAG_308_RC_NO_CONF; 130 } 131 return; 132 default: 133 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 134 break; 135 } 136 } 137