1 /* 2 * PA-RISC emulation cpu definitions for qemu. 3 * 4 * Copyright (c) 2016 Richard Henderson <rth@twiddle.net> 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef HPPA_CPU_H 21 #define HPPA_CPU_H 22 23 #include "cpu-qom.h" 24 #include "exec/cpu-defs.h" 25 26 27 /* PA-RISC 1.x processors have a strong memory model. */ 28 /* ??? While we do not yet implement PA-RISC 2.0, those processors have 29 a weak memory model, but with TLB bits that force ordering on a per-page 30 basis. It's probably easier to fall back to a strong memory model. */ 31 #define TCG_GUEST_DEFAULT_MO TCG_MO_ALL 32 33 #define ALIGNED_ONLY 34 #define MMU_KERNEL_IDX 0 35 #define MMU_USER_IDX 3 36 #define MMU_PHYS_IDX 4 37 #define TARGET_INSN_START_EXTRA_WORDS 1 38 39 /* Hardware exceptions, interupts, faults, and traps. */ 40 #define EXCP_HPMC 1 /* high priority machine check */ 41 #define EXCP_POWER_FAIL 2 42 #define EXCP_RC 3 /* recovery counter */ 43 #define EXCP_EXT_INTERRUPT 4 /* external interrupt */ 44 #define EXCP_LPMC 5 /* low priority machine check */ 45 #define EXCP_ITLB_MISS 6 /* itlb miss / instruction page fault */ 46 #define EXCP_IMP 7 /* instruction memory protection trap */ 47 #define EXCP_ILL 8 /* illegal instruction trap */ 48 #define EXCP_BREAK 9 /* break instruction */ 49 #define EXCP_PRIV_OPR 10 /* privileged operation trap */ 50 #define EXCP_PRIV_REG 11 /* privileged register trap */ 51 #define EXCP_OVERFLOW 12 /* signed overflow trap */ 52 #define EXCP_COND 13 /* trap-on-condition */ 53 #define EXCP_ASSIST 14 /* assist exception trap */ 54 #define EXCP_DTLB_MISS 15 /* dtlb miss / data page fault */ 55 #define EXCP_NA_ITLB_MISS 16 /* non-access itlb miss */ 56 #define EXCP_NA_DTLB_MISS 17 /* non-access dtlb miss */ 57 #define EXCP_DMP 18 /* data memory protection trap */ 58 #define EXCP_DMB 19 /* data memory break trap */ 59 #define EXCP_TLB_DIRTY 20 /* tlb dirty bit trap */ 60 #define EXCP_PAGE_REF 21 /* page reference trap */ 61 #define EXCP_ASSIST_EMU 22 /* assist emulation trap */ 62 #define EXCP_HPT 23 /* high-privilege transfer trap */ 63 #define EXCP_LPT 24 /* low-privilege transfer trap */ 64 #define EXCP_TB 25 /* taken branch trap */ 65 #define EXCP_DMAR 26 /* data memory access rights trap */ 66 #define EXCP_DMPI 27 /* data memory protection id trap */ 67 #define EXCP_UNALIGN 28 /* unaligned data reference trap */ 68 #define EXCP_PER_INTERRUPT 29 /* performance monitor interrupt */ 69 70 /* Exceptions for linux-user emulation. */ 71 #define EXCP_SYSCALL 30 72 #define EXCP_SYSCALL_LWS 31 73 74 /* Taken from Linux kernel: arch/parisc/include/asm/psw.h */ 75 #define PSW_I 0x00000001 76 #define PSW_D 0x00000002 77 #define PSW_P 0x00000004 78 #define PSW_Q 0x00000008 79 #define PSW_R 0x00000010 80 #define PSW_F 0x00000020 81 #define PSW_G 0x00000040 /* PA1.x only */ 82 #define PSW_O 0x00000080 /* PA2.0 only */ 83 #define PSW_CB 0x0000ff00 84 #define PSW_M 0x00010000 85 #define PSW_V 0x00020000 86 #define PSW_C 0x00040000 87 #define PSW_B 0x00080000 88 #define PSW_X 0x00100000 89 #define PSW_N 0x00200000 90 #define PSW_L 0x00400000 91 #define PSW_H 0x00800000 92 #define PSW_T 0x01000000 93 #define PSW_S 0x02000000 94 #define PSW_E 0x04000000 95 #ifdef TARGET_HPPA64 96 #define PSW_W 0x08000000 /* PA2.0 only */ 97 #else 98 #define PSW_W 0 99 #endif 100 #define PSW_Z 0x40000000 /* PA1.x only */ 101 #define PSW_Y 0x80000000 /* PA1.x only */ 102 103 #define PSW_SM (PSW_W | PSW_E | PSW_O | PSW_G | PSW_F \ 104 | PSW_R | PSW_Q | PSW_P | PSW_D | PSW_I) 105 106 /* ssm/rsm instructions number PSW_W and PSW_E differently */ 107 #define PSW_SM_I PSW_I /* Enable External Interrupts */ 108 #define PSW_SM_D PSW_D 109 #define PSW_SM_P PSW_P 110 #define PSW_SM_Q PSW_Q /* Enable Interrupt State Collection */ 111 #define PSW_SM_R PSW_R /* Enable Recover Counter Trap */ 112 #ifdef TARGET_HPPA64 113 #define PSW_SM_E 0x100 114 #define PSW_SM_W 0x200 /* PA2.0 only : Enable Wide Mode */ 115 #else 116 #define PSW_SM_E 0 117 #define PSW_SM_W 0 118 #endif 119 120 #define CR_RC 0 121 #define CR_PID1 8 122 #define CR_PID2 9 123 #define CR_PID3 12 124 #define CR_PID4 13 125 #define CR_SCRCCR 10 126 #define CR_SAR 11 127 #define CR_IVA 14 128 #define CR_EIEM 15 129 #define CR_IT 16 130 #define CR_IIASQ 17 131 #define CR_IIAOQ 18 132 #define CR_IIR 19 133 #define CR_ISR 20 134 #define CR_IOR 21 135 #define CR_IPSW 22 136 #define CR_EIRR 23 137 138 typedef struct CPUHPPAState CPUHPPAState; 139 140 #if TARGET_REGISTER_BITS == 32 141 typedef uint32_t target_ureg; 142 typedef int32_t target_sreg; 143 #define TREG_FMT_lx "%08"PRIx32 144 #define TREG_FMT_ld "%"PRId32 145 #else 146 typedef uint64_t target_ureg; 147 typedef int64_t target_sreg; 148 #define TREG_FMT_lx "%016"PRIx64 149 #define TREG_FMT_ld "%"PRId64 150 #endif 151 152 typedef struct { 153 uint64_t va_b; 154 uint64_t va_e; 155 target_ureg pa; 156 unsigned u : 1; 157 unsigned t : 1; 158 unsigned d : 1; 159 unsigned b : 1; 160 unsigned page_size : 4; 161 unsigned ar_type : 3; 162 unsigned ar_pl1 : 2; 163 unsigned ar_pl2 : 2; 164 unsigned entry_valid : 1; 165 unsigned access_id : 16; 166 } hppa_tlb_entry; 167 168 struct CPUHPPAState { 169 target_ureg gr[32]; 170 uint64_t fr[32]; 171 uint64_t sr[8]; /* stored shifted into place for gva */ 172 173 target_ureg psw; /* All psw bits except the following: */ 174 target_ureg psw_n; /* boolean */ 175 target_sreg psw_v; /* in most significant bit */ 176 177 /* Splitting the carry-borrow field into the MSB and "the rest", allows 178 * for "the rest" to be deleted when it is unused, but the MSB is in use. 179 * In addition, it's easier to compute carry-in for bit B+1 than it is to 180 * compute carry-out for bit B (3 vs 4 insns for addition, assuming the 181 * host has the appropriate add-with-carry insn to compute the msb). 182 * Therefore the carry bits are stored as: cb_msb : cb & 0x11111110. 183 */ 184 target_ureg psw_cb; /* in least significant bit of next nibble */ 185 target_ureg psw_cb_msb; /* boolean */ 186 187 target_ureg iaoq_f; /* front */ 188 target_ureg iaoq_b; /* back, aka next instruction */ 189 uint64_t iasq_f; 190 uint64_t iasq_b; 191 192 uint32_t fr0_shadow; /* flags, c, ca/cq, rm, d, enables */ 193 float_status fp_status; 194 195 target_ureg cr[32]; /* control registers */ 196 target_ureg cr_back[2]; /* back of cr17/cr18 */ 197 target_ureg shadow[7]; /* shadow registers */ 198 199 /* ??? The number of entries isn't specified by the architecture. */ 200 /* ??? Implement a unified itlb/dtlb for the moment. */ 201 /* ??? We should use a more intelligent data structure. */ 202 hppa_tlb_entry tlb[256]; 203 uint32_t tlb_last; 204 }; 205 206 /** 207 * HPPACPU: 208 * @env: #CPUHPPAState 209 * 210 * An HPPA CPU. 211 */ 212 struct HPPACPU { 213 /*< private >*/ 214 CPUState parent_obj; 215 /*< public >*/ 216 217 CPUNegativeOffsetState neg; 218 CPUHPPAState env; 219 QEMUTimer *alarm_timer; 220 }; 221 222 223 typedef CPUHPPAState CPUArchState; 224 typedef HPPACPU ArchCPU; 225 226 #include "exec/cpu-all.h" 227 228 static inline int cpu_mmu_index(CPUHPPAState *env, bool ifetch) 229 { 230 #ifdef CONFIG_USER_ONLY 231 return MMU_USER_IDX; 232 #else 233 if (env->psw & (ifetch ? PSW_C : PSW_D)) { 234 return env->iaoq_f & 3; 235 } 236 return MMU_PHYS_IDX; /* mmu disabled */ 237 #endif 238 } 239 240 void hppa_translate_init(void); 241 242 #define CPU_RESOLVING_TYPE TYPE_HPPA_CPU 243 244 static inline target_ulong hppa_form_gva_psw(target_ureg psw, uint64_t spc, 245 target_ureg off) 246 { 247 #ifdef CONFIG_USER_ONLY 248 return off; 249 #else 250 off &= (psw & PSW_W ? 0x3fffffffffffffffull : 0xffffffffull); 251 return spc | off; 252 #endif 253 } 254 255 static inline target_ulong hppa_form_gva(CPUHPPAState *env, uint64_t spc, 256 target_ureg off) 257 { 258 return hppa_form_gva_psw(env->psw, spc, off); 259 } 260 261 /* Since PSW_{I,CB} will never need to be in tb->flags, reuse them. 262 * TB_FLAG_SR_SAME indicates that SR4 through SR7 all contain the 263 * same value. 264 */ 265 #define TB_FLAG_SR_SAME PSW_I 266 #define TB_FLAG_PRIV_SHIFT 8 267 268 static inline void cpu_get_tb_cpu_state(CPUHPPAState *env, target_ulong *pc, 269 target_ulong *cs_base, 270 uint32_t *pflags) 271 { 272 uint32_t flags = env->psw_n * PSW_N; 273 274 /* TB lookup assumes that PC contains the complete virtual address. 275 If we leave space+offset separate, we'll get ITLB misses to an 276 incomplete virtual address. This also means that we must separate 277 out current cpu priviledge from the low bits of IAOQ_F. */ 278 #ifdef CONFIG_USER_ONLY 279 *pc = env->iaoq_f & -4; 280 *cs_base = env->iaoq_b & -4; 281 #else 282 /* ??? E, T, H, L, B, P bits need to be here, when implemented. */ 283 flags |= env->psw & (PSW_W | PSW_C | PSW_D); 284 flags |= (env->iaoq_f & 3) << TB_FLAG_PRIV_SHIFT; 285 286 *pc = (env->psw & PSW_C 287 ? hppa_form_gva_psw(env->psw, env->iasq_f, env->iaoq_f & -4) 288 : env->iaoq_f & -4); 289 *cs_base = env->iasq_f; 290 291 /* Insert a difference between IAOQ_B and IAOQ_F within the otherwise zero 292 low 32-bits of CS_BASE. This will succeed for all direct branches, 293 which is the primary case we care about -- using goto_tb within a page. 294 Failure is indicated by a zero difference. */ 295 if (env->iasq_f == env->iasq_b) { 296 target_sreg diff = env->iaoq_b - env->iaoq_f; 297 if (TARGET_REGISTER_BITS == 32 || diff == (int32_t)diff) { 298 *cs_base |= (uint32_t)diff; 299 } 300 } 301 if ((env->sr[4] == env->sr[5]) 302 & (env->sr[4] == env->sr[6]) 303 & (env->sr[4] == env->sr[7])) { 304 flags |= TB_FLAG_SR_SAME; 305 } 306 #endif 307 308 *pflags = flags; 309 } 310 311 target_ureg cpu_hppa_get_psw(CPUHPPAState *env); 312 void cpu_hppa_put_psw(CPUHPPAState *env, target_ureg); 313 void cpu_hppa_loaded_fr0(CPUHPPAState *env); 314 315 #ifdef CONFIG_USER_ONLY 316 static inline void cpu_hppa_change_prot_id(CPUHPPAState *env) { } 317 #else 318 void cpu_hppa_change_prot_id(CPUHPPAState *env); 319 #endif 320 321 #define cpu_signal_handler cpu_hppa_signal_handler 322 323 int cpu_hppa_signal_handler(int host_signum, void *pinfo, void *puc); 324 hwaddr hppa_cpu_get_phys_page_debug(CPUState *cs, vaddr addr); 325 int hppa_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); 326 int hppa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 327 void hppa_cpu_do_interrupt(CPUState *cpu); 328 bool hppa_cpu_exec_interrupt(CPUState *cpu, int int_req); 329 void hppa_cpu_dump_state(CPUState *cs, FILE *f, int); 330 bool hppa_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 331 MMUAccessType access_type, int mmu_idx, 332 bool probe, uintptr_t retaddr); 333 #ifndef CONFIG_USER_ONLY 334 int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx, 335 int type, hwaddr *pphys, int *pprot); 336 extern const MemoryRegionOps hppa_io_eir_ops; 337 extern const struct VMStateDescription vmstate_hppa_cpu; 338 void hppa_cpu_alarm_timer(void *); 339 int hppa_artype_for_page(CPUHPPAState *env, target_ulong vaddr); 340 #endif 341 void QEMU_NORETURN hppa_dynamic_excp(CPUHPPAState *env, int excp, uintptr_t ra); 342 343 #endif /* HPPA_CPU_H */ 344