target/hppa/cpu.h

   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 "qemu-common.h"
  24 #include "cpu-qom.h"
  25
  26 #ifdef TARGET_HPPA64
  27 #define TARGET_LONG_BITS            64
  28 #define TARGET_VIRT_ADDR_SPACE_BITS 64
  29 #define TARGET_REGISTER_BITS        64
  30 #define TARGET_PHYS_ADDR_SPACE_BITS 64
  31 #elif defined(CONFIG_USER_ONLY)
  32 #define TARGET_LONG_BITS            32
  33 #define TARGET_VIRT_ADDR_SPACE_BITS 32
  34 #define TARGET_REGISTER_BITS        32
  35 #define TARGET_PHYS_ADDR_SPACE_BITS 32
  36 #else
  37 /* In order to form the GVA from space:offset,
  38    we need a 64-bit virtual address space.  */
  39 #define TARGET_LONG_BITS            64
  40 #define TARGET_VIRT_ADDR_SPACE_BITS 64
  41 #define TARGET_REGISTER_BITS        32
  42 #define TARGET_PHYS_ADDR_SPACE_BITS 32
  43 #endif
  44
  45 /* PA-RISC 1.x processors have a strong memory model.  */
  46 /* ??? While we do not yet implement PA-RISC 2.0, those processors have
  47    a weak memory model, but with TLB bits that force ordering on a per-page
  48    basis.  It's probably easier to fall back to a strong memory model.  */
  49 #define TCG_GUEST_DEFAULT_MO        TCG_MO_ALL
  50
  51 #define CPUArchState struct CPUHPPAState
  52
  53 #include "exec/cpu-defs.h"
  54
  55 #define TARGET_PAGE_BITS 12
  56
  57 #define ALIGNED_ONLY
  58 #define NB_MMU_MODES     5
  59 #define MMU_KERNEL_IDX   0
  60 #define MMU_USER_IDX     3
  61 #define MMU_PHYS_IDX     4
  62 #define TARGET_INSN_START_EXTRA_WORDS 1
  63
  64 /* Hardware exceptions, interupts, faults, and traps.  */
  65 #define EXCP_HPMC                1  /* high priority machine check */
  66 #define EXCP_POWER_FAIL          2
  67 #define EXCP_RC                  3  /* recovery counter */
  68 #define EXCP_EXT_INTERRUPT       4  /* external interrupt */
  69 #define EXCP_LPMC                5  /* low priority machine check */
  70 #define EXCP_ITLB_MISS           6  /* itlb miss / instruction page fault */
  71 #define EXCP_IMP                 7  /* instruction memory protection trap */
  72 #define EXCP_ILL                 8  /* illegal instruction trap */
  73 #define EXCP_BREAK               9  /* break instruction */
  74 #define EXCP_PRIV_OPR            10 /* privileged operation trap */
  75 #define EXCP_PRIV_REG            11 /* privileged register trap */
  76 #define EXCP_OVERFLOW            12 /* signed overflow trap */
  77 #define EXCP_COND                13 /* trap-on-condition */
  78 #define EXCP_ASSIST              14 /* assist exception trap */
  79 #define EXCP_DTLB_MISS           15 /* dtlb miss / data page fault */
  80 #define EXCP_NA_ITLB_MISS        16 /* non-access itlb miss */
  81 #define EXCP_NA_DTLB_MISS        17 /* non-access dtlb miss */
  82 #define EXCP_DMP                 18 /* data memory protection trap */
  83 #define EXCP_DMB                 19 /* data memory break trap */
  84 #define EXCP_TLB_DIRTY           20 /* tlb dirty bit trap */
  85 #define EXCP_PAGE_REF            21 /* page reference trap */
  86 #define EXCP_ASSIST_EMU          22 /* assist emulation trap */
  87 #define EXCP_HPT                 23 /* high-privilege transfer trap */
  88 #define EXCP_LPT                 24 /* low-privilege transfer trap */
  89 #define EXCP_TB                  25 /* taken branch trap */
  90 #define EXCP_DMAR                26 /* data memory access rights trap */
  91 #define EXCP_DMPI                27 /* data memory protection id trap */
  92 #define EXCP_UNALIGN             28 /* unaligned data reference trap */
  93 #define EXCP_PER_INTERRUPT       29 /* performance monitor interrupt */
  94
  95 /* Exceptions for linux-user emulation.  */
  96 #define EXCP_SYSCALL             30
  97 #define EXCP_SYSCALL_LWS         31
  98
  99 /* Taken from Linux kernel: arch/parisc/include/asm/psw.h */
 100 #define PSW_I            0x00000001
 101 #define PSW_D            0x00000002
 102 #define PSW_P            0x00000004
 103 #define PSW_Q            0x00000008
 104 #define PSW_R            0x00000010
 105 #define PSW_F            0x00000020
 106 #define PSW_G            0x00000040 /* PA1.x only */
 107 #define PSW_O            0x00000080 /* PA2.0 only */
 108 #define PSW_CB           0x0000ff00
 109 #define PSW_M            0x00010000
 110 #define PSW_V            0x00020000
 111 #define PSW_C            0x00040000
 112 #define PSW_B            0x00080000
 113 #define PSW_X            0x00100000
 114 #define PSW_N            0x00200000
 115 #define PSW_L            0x00400000
 116 #define PSW_H            0x00800000
 117 #define PSW_T            0x01000000
 118 #define PSW_S            0x02000000
 119 #define PSW_E            0x04000000
 120 #ifdef TARGET_HPPA64
 121 #define PSW_W            0x08000000 /* PA2.0 only */
 122 #else
 123 #define PSW_W            0
 124 #endif
 125 #define PSW_Z            0x40000000 /* PA1.x only */
 126 #define PSW_Y            0x80000000 /* PA1.x only */
 127
 128 #define PSW_SM (PSW_W | PSW_E | PSW_O | PSW_G | PSW_F \
 129                | PSW_R | PSW_Q | PSW_P | PSW_D | PSW_I)
 130
 131 /* ssm/rsm instructions number PSW_W and PSW_E differently */
 132 #define PSW_SM_I         PSW_I      /* Enable External Interrupts */
 133 #define PSW_SM_D         PSW_D
 134 #define PSW_SM_P         PSW_P
 135 #define PSW_SM_Q         PSW_Q      /* Enable Interrupt State Collection */
 136 #define PSW_SM_R         PSW_R      /* Enable Recover Counter Trap */
 137 #ifdef TARGET_HPPA64
 138 #define PSW_SM_E         0x100
 139 #define PSW_SM_W         0x200      /* PA2.0 only : Enable Wide Mode */
 140 #else
 141 #define PSW_SM_E         0
 142 #define PSW_SM_W         0
 143 #endif
 144
 145 #define CR_RC            0
 146 #define CR_SCRCCR        10
 147 #define CR_SAR           11
 148 #define CR_IVA           14
 149 #define CR_EIEM          15
 150 #define CR_IT            16
 151 #define CR_IIASQ         17
 152 #define CR_IIAOQ         18
 153 #define CR_IIR           19
 154 #define CR_ISR           20
 155 #define CR_IOR           21
 156 #define CR_IPSW          22
 157 #define CR_EIRR          23
 158
 159 typedef struct CPUHPPAState CPUHPPAState;
 160
 161 #if TARGET_REGISTER_BITS == 32
 162 typedef uint32_t target_ureg;
 163 typedef int32_t  target_sreg;
 164 #define TREG_FMT_lx   "%08"PRIx32
 165 #define TREG_FMT_ld   "%"PRId32
 166 #else
 167 typedef uint64_t target_ureg;
 168 typedef int64_t  target_sreg;
 169 #define TREG_FMT_lx   "%016"PRIx64
 170 #define TREG_FMT_ld   "%"PRId64
 171 #endif
 172
 173 typedef struct {
 174     uint64_t va_b;
 175     uint64_t va_e;
 176     target_ureg pa;
 177     unsigned u : 1;
 178     unsigned t : 1;
 179     unsigned d : 1;
 180     unsigned b : 1;
 181     unsigned page_size : 4;
 182     unsigned ar_type : 3;
 183     unsigned ar_pl1 : 2;
 184     unsigned ar_pl2 : 2;
 185     unsigned entry_valid : 1;
 186     unsigned access_id : 16;
 187 } hppa_tlb_entry;
 188
 189 struct CPUHPPAState {
 190     target_ureg gr[32];
 191     uint64_t fr[32];
 192     uint64_t sr[8];          /* stored shifted into place for gva */
 193
 194     target_ureg psw;         /* All psw bits except the following:  */
 195     target_ureg psw_n;       /* boolean */
 196     target_sreg psw_v;       /* in most significant bit */
 197
 198     /* Splitting the carry-borrow field into the MSB and "the rest", allows
 199      * for "the rest" to be deleted when it is unused, but the MSB is in use.
 200      * In addition, it's easier to compute carry-in for bit B+1 than it is to
 201      * compute carry-out for bit B (3 vs 4 insns for addition, assuming the
 202      * host has the appropriate add-with-carry insn to compute the msb).
 203      * Therefore the carry bits are stored as: cb_msb : cb & 0x11111110.
 204      */
 205     target_ureg psw_cb;      /* in least significant bit of next nibble */
 206     target_ureg psw_cb_msb;  /* boolean */
 207
 208     target_ureg iaoq_f;      /* front */
 209     target_ureg iaoq_b;      /* back, aka next instruction */
 210     uint64_t iasq_f;
 211     uint64_t iasq_b;
 212
 213     uint32_t fr0_shadow;     /* flags, c, ca/cq, rm, d, enables */
 214     float_status fp_status;
 215
 216     target_ureg cr[32];      /* control registers */
 217     target_ureg cr_back[2];  /* back of cr17/cr18 */
 218     target_ureg shadow[7];   /* shadow registers */
 219
 220     /* Those resources are used only in QEMU core */
 221     CPU_COMMON
 222
 223     /* ??? The number of entries isn't specified by the architecture.  */
 224     /* ??? Implement a unified itlb/dtlb for the moment.  */
 225     /* ??? We should use a more intelligent data structure.  */
 226     hppa_tlb_entry tlb[256];
 227     uint32_t tlb_last;
 228 };
 229
 230 /**
 231  * HPPACPU:
 232  * @env: #CPUHPPAState
 233  *
 234  * An HPPA CPU.
 235  */
 236 struct HPPACPU {
 237     /*< private >*/
 238     CPUState parent_obj;
 239     /*< public >*/
 240
 241     CPUHPPAState env;
 242     QEMUTimer *alarm_timer;
 243 };
 244
 245 static inline HPPACPU *hppa_env_get_cpu(CPUHPPAState *env)
 246 {
 247     return container_of(env, HPPACPU, env);
 248 }
 249
 250 #define ENV_GET_CPU(e)  CPU(hppa_env_get_cpu(e))
 251 #define ENV_OFFSET      offsetof(HPPACPU, env)
 252
 253 #include "exec/cpu-all.h"
 254
 255 static inline int cpu_mmu_index(CPUHPPAState *env, bool ifetch)
 256 {
 257 #ifdef CONFIG_USER_ONLY
 258     return MMU_USER_IDX;
 259 #else
 260     if (env->psw & (ifetch ? PSW_C : PSW_D)) {
 261         return env->iaoq_f & 3;
 262     }
 263     return MMU_PHYS_IDX;  /* mmu disabled */
 264 #endif
 265 }
 266
 267 void hppa_translate_init(void);
 268
 269 #define CPU_RESOLVING_TYPE TYPE_HPPA_CPU
 270
 271 void hppa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 272
 273 static inline target_ulong hppa_form_gva_psw(target_ureg psw, uint64_t spc,
 274                                              target_ureg off)
 275 {
 276 #ifdef CONFIG_USER_ONLY
 277     return off;
 278 #else
 279     off &= (psw & PSW_W ? 0x3fffffffffffffffull : 0xffffffffull);
 280     return spc | off;
 281 #endif
 282 }
 283
 284 static inline target_ulong hppa_form_gva(CPUHPPAState *env, uint64_t spc,
 285                                          target_ureg off)
 286 {
 287     return hppa_form_gva_psw(env->psw, spc, off);
 288 }
 289
 290 /* Since PSW_{I,CB} will never need to be in tb->flags, reuse them.
 291  * TB_FLAG_SR_SAME indicates that SR4 through SR7 all contain the
 292  * same value.
 293  */
 294 #define TB_FLAG_SR_SAME     PSW_I
 295 #define TB_FLAG_PRIV_SHIFT  8
 296
 297 static inline void cpu_get_tb_cpu_state(CPUHPPAState *env, target_ulong *pc,
 298                                         target_ulong *cs_base,
 299                                         uint32_t *pflags)
 300 {
 301     uint32_t flags = env->psw_n * PSW_N;
 302
 303     /* TB lookup assumes that PC contains the complete virtual address.
 304        If we leave space+offset separate, we'll get ITLB misses to an
 305        incomplete virtual address.  This also means that we must separate
 306        out current cpu priviledge from the low bits of IAOQ_F.  */
 307 #ifdef CONFIG_USER_ONLY
 308     *pc = env->iaoq_f;
 309     *cs_base = env->iaoq_b;
 310 #else
 311     /* ??? E, T, H, L, B, P bits need to be here, when implemented.  */
 312     flags |= env->psw & (PSW_W | PSW_C | PSW_D);
 313     flags |= (env->iaoq_f & 3) << TB_FLAG_PRIV_SHIFT;
 314
 315     *pc = (env->psw & PSW_C
 316            ? hppa_form_gva_psw(env->psw, env->iasq_f, env->iaoq_f & -4)
 317            : env->iaoq_f & -4);
 318     *cs_base = env->iasq_f;
 319
 320     /* Insert a difference between IAOQ_B and IAOQ_F within the otherwise zero
 321        low 32-bits of CS_BASE.  This will succeed for all direct branches,
 322        which is the primary case we care about -- using goto_tb within a page.
 323        Failure is indicated by a zero difference.  */
 324     if (env->iasq_f == env->iasq_b) {
 325         target_sreg diff = env->iaoq_b - env->iaoq_f;
 326         if (TARGET_REGISTER_BITS == 32 || diff == (int32_t)diff) {
 327             *cs_base |= (uint32_t)diff;
 328         }
 329     }
 330     if ((env->sr[4] == env->sr[5])
 331         & (env->sr[4] == env->sr[6])
 332         & (env->sr[4] == env->sr[7])) {
 333         flags |= TB_FLAG_SR_SAME;
 334     }
 335 #endif
 336
 337     *pflags = flags;
 338 }
 339
 340 target_ureg cpu_hppa_get_psw(CPUHPPAState *env);
 341 void cpu_hppa_put_psw(CPUHPPAState *env, target_ureg);
 342 void cpu_hppa_loaded_fr0(CPUHPPAState *env);
 343
 344 #define cpu_signal_handler cpu_hppa_signal_handler
 345
 346 int cpu_hppa_signal_handler(int host_signum, void *pinfo, void *puc);
 347 hwaddr hppa_cpu_get_phys_page_debug(CPUState *cs, vaddr addr);
 348 int hppa_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 349 int hppa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 350 void hppa_cpu_do_interrupt(CPUState *cpu);
 351 bool hppa_cpu_exec_interrupt(CPUState *cpu, int int_req);
 352 void hppa_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function, int);
 353 #ifdef CONFIG_USER_ONLY
 354 int hppa_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int size,
 355                               int rw, int midx);
 356 #else
 357 int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx,
 358                               int type, hwaddr *pphys, int *pprot);
 359 extern const MemoryRegionOps hppa_io_eir_ops;
 360 extern const struct VMStateDescription vmstate_hppa_cpu;
 361 void hppa_cpu_alarm_timer(void *);
 362 int hppa_artype_for_page(CPUHPPAState *env, target_ulong vaddr);
 363 #endif
 364 void QEMU_NORETURN hppa_dynamic_excp(CPUHPPAState *env, int excp, uintptr_t ra);
 365
 366 #endif /* HPPA_CPU_H */