include/asm-ia64/processor.h

   1 #ifndef _ASM_IA64_PROCESSOR_H
   2 #define _ASM_IA64_PROCESSOR_H
   3
   4 /*
   5  * Copyright (C) 1998-2004 Hewlett-Packard Co
   6  *      David Mosberger-Tang <davidm@hpl.hp.com>
   7  *      Stephane Eranian <eranian@hpl.hp.com>
   8  * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>
   9  * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
  10  *
  11  * 11/24/98     S.Eranian       added ia64_set_iva()
  12  * 12/03/99     D. Mosberger    implement thread_saved_pc() via kernel unwind API
  13  * 06/16/00     A. Mallick      added csd/ssd/tssd for ia32 support
  14  */
  15
  16
  17 #include <asm/intrinsics.h>
  18 #include <asm/kregs.h>
  19 #include <asm/ptrace.h>
  20 #include <asm/ustack.h>
  21
  22 #define IA64_NUM_PHYS_STACK_REG 96
  23 #define IA64_NUM_DBG_REGS       8
  24
  25 #define DEFAULT_MAP_BASE        __IA64_UL_CONST(0x2000000000000000)
  26 #define DEFAULT_TASK_SIZE       __IA64_UL_CONST(0xa000000000000000)
  27
  28 /*
  29  * TASK_SIZE really is a mis-named.  It really is the maximum user
  30  * space address (plus one).  On IA-64, there are five regions of 2TB
  31  * each (assuming 8KB page size), for a total of 8TB of user virtual
  32  * address space.
  33  */
  34 #define TASK_SIZE_OF(tsk)       ((tsk)->thread.task_size)
  35 #define TASK_SIZE               TASK_SIZE_OF(current)
  36
  37 /*
  38  * This decides where the kernel will search for a free chunk of vm
  39  * space during mmap's.
  40  */
  41 #define TASK_UNMAPPED_BASE      (current->thread.map_base)
  42
  43 #define IA64_THREAD_FPH_VALID   (__IA64_UL(1) << 0)     /* floating-point high state valid? */
  44 #define IA64_THREAD_DBG_VALID   (__IA64_UL(1) << 1)     /* debug registers valid? */
  45 #define IA64_THREAD_PM_VALID    (__IA64_UL(1) << 2)     /* performance registers valid? */
  46 #define IA64_THREAD_UAC_NOPRINT (__IA64_UL(1) << 3)     /* don't log unaligned accesses */
  47 #define IA64_THREAD_UAC_SIGBUS  (__IA64_UL(1) << 4)     /* generate SIGBUS on unaligned acc. */
  48 #define IA64_THREAD_MIGRATION   (__IA64_UL(1) << 5)     /* require migration
  49                                                            sync at ctx sw */
  50 #define IA64_THREAD_FPEMU_NOPRINT (__IA64_UL(1) << 6)   /* don't log any fpswa faults */
  51 #define IA64_THREAD_FPEMU_SIGFPE  (__IA64_UL(1) << 7)   /* send a SIGFPE for fpswa faults */
  52
  53 #define IA64_THREAD_UAC_SHIFT   3
  54 #define IA64_THREAD_UAC_MASK    (IA64_THREAD_UAC_NOPRINT | IA64_THREAD_UAC_SIGBUS)
  55 #define IA64_THREAD_FPEMU_SHIFT 6
  56 #define IA64_THREAD_FPEMU_MASK  (IA64_THREAD_FPEMU_NOPRINT | IA64_THREAD_FPEMU_SIGFPE)
  57
  58
  59 /*
  60  * This shift should be large enough to be able to represent 1000000000/itc_freq with good
  61  * accuracy while being small enough to fit 10*1000000000<<IA64_NSEC_PER_CYC_SHIFT in 64 bits
  62  * (this will give enough slack to represent 10 seconds worth of time as a scaled number).
  63  */
  64 #define IA64_NSEC_PER_CYC_SHIFT 30
  65
  66 #ifndef __ASSEMBLY__
  67
  68 #include <linux/cache.h>
  69 #include <linux/compiler.h>
  70 #include <linux/threads.h>
  71 #include <linux/types.h>
  72
  73 #include <asm/fpu.h>
  74 #include <asm/page.h>
  75 #include <asm/percpu.h>
  76 #include <asm/rse.h>
  77 #include <asm/unwind.h>
  78 #include <asm/atomic.h>
  79 #ifdef CONFIG_NUMA
  80 #include <asm/nodedata.h>
  81 #endif
  82
  83 /* like above but expressed as bitfields for more efficient access: */
  84 struct ia64_psr {
  85         __u64 reserved0 : 1;
  86         __u64 be : 1;
  87         __u64 up : 1;
  88         __u64 ac : 1;
  89         __u64 mfl : 1;
  90         __u64 mfh : 1;
  91         __u64 reserved1 : 7;
  92         __u64 ic : 1;
  93         __u64 i : 1;
  94         __u64 pk : 1;
  95         __u64 reserved2 : 1;
  96         __u64 dt : 1;
  97         __u64 dfl : 1;
  98         __u64 dfh : 1;
  99         __u64 sp : 1;
 100         __u64 pp : 1;
 101         __u64 di : 1;
 102         __u64 si : 1;
 103         __u64 db : 1;
 104         __u64 lp : 1;
 105         __u64 tb : 1;
 106         __u64 rt : 1;
 107         __u64 reserved3 : 4;
 108         __u64 cpl : 2;
 109         __u64 is : 1;
 110         __u64 mc : 1;
 111         __u64 it : 1;
 112         __u64 id : 1;
 113         __u64 da : 1;
 114         __u64 dd : 1;
 115         __u64 ss : 1;
 116         __u64 ri : 2;
 117         __u64 ed : 1;
 118         __u64 bn : 1;
 119         __u64 reserved4 : 19;
 120 };
 121
 122 union ia64_isr {
 123         __u64  val;
 124         struct {
 125                 __u64 code : 16;
 126                 __u64 vector : 8;
 127                 __u64 reserved1 : 8;
 128                 __u64 x : 1;
 129                 __u64 w : 1;
 130                 __u64 r : 1;
 131                 __u64 na : 1;
 132                 __u64 sp : 1;
 133                 __u64 rs : 1;
 134                 __u64 ir : 1;
 135                 __u64 ni : 1;
 136                 __u64 so : 1;
 137                 __u64 ei : 2;
 138                 __u64 ed : 1;
 139                 __u64 reserved2 : 20;
 140         };
 141 };
 142
 143 union ia64_lid {
 144         __u64 val;
 145         struct {
 146                 __u64  rv  : 16;
 147                 __u64  eid : 8;
 148                 __u64  id  : 8;
 149                 __u64  ig  : 32;
 150         };
 151 };
 152
 153 union ia64_tpr {
 154         __u64 val;
 155         struct {
 156                 __u64 ig0 : 4;
 157                 __u64 mic : 4;
 158                 __u64 rsv : 8;
 159                 __u64 mmi : 1;
 160                 __u64 ig1 : 47;
 161         };
 162 };
 163
 164 union ia64_itir {
 165         __u64 val;
 166         struct {
 167                 __u64 rv3  :  2; /* 0-1 */
 168                 __u64 ps   :  6; /* 2-7 */
 169                 __u64 key  : 24; /* 8-31 */
 170                 __u64 rv4  : 32; /* 32-63 */
 171         };
 172 };
 173
 174 union  ia64_rr {
 175         __u64 val;
 176         struct {
 177                 __u64  ve       :  1;  /* enable hw walker */
 178                 __u64  reserved0:  1;  /* reserved */
 179                 __u64  ps       :  6;  /* log page size */
 180                 __u64  rid      : 24;  /* region id */
 181                 __u64  reserved1: 32;  /* reserved */
 182         };
 183 };
 184
 185 /*
 186  * CPU type, hardware bug flags, and per-CPU state.  Frequently used
 187  * state comes earlier:
 188  */
 189 struct cpuinfo_ia64 {
 190         __u32 softirq_pending;
 191         __u64 itm_delta;        /* # of clock cycles between clock ticks */
 192         __u64 itm_next;         /* interval timer mask value to use for next clock tick */
 193         __u64 nsec_per_cyc;     /* (1000000000<<IA64_NSEC_PER_CYC_SHIFT)/itc_freq */
 194         __u64 unimpl_va_mask;   /* mask of unimplemented virtual address bits (from PAL) */
 195         __u64 unimpl_pa_mask;   /* mask of unimplemented physical address bits (from PAL) */
 196         __u64 itc_freq;         /* frequency of ITC counter */
 197         __u64 proc_freq;        /* frequency of processor */
 198         __u64 cyc_per_usec;     /* itc_freq/1000000 */
 199         __u64 ptce_base;
 200         __u32 ptce_count[2];
 201         __u32 ptce_stride[2];
 202         struct task_struct *ksoftirqd;  /* kernel softirq daemon for this CPU */
 203
 204 #ifdef CONFIG_SMP
 205         __u64 loops_per_jiffy;
 206         int cpu;
 207         __u32 socket_id;        /* physical processor socket id */
 208         __u16 core_id;          /* core id */
 209         __u16 thread_id;        /* thread id */
 210         __u16 num_log;          /* Total number of logical processors on
 211                                  * this socket that were successfully booted */
 212         __u8  cores_per_socket; /* Cores per processor socket */
 213         __u8  threads_per_core; /* Threads per core */
 214 #endif
 215
 216         /* CPUID-derived information: */
 217         __u64 ppn;
 218         __u64 features;
 219         __u8 number;
 220         __u8 revision;
 221         __u8 model;
 222         __u8 family;
 223         __u8 archrev;
 224         char vendor[16];
 225         char *model_name;
 226
 227 #ifdef CONFIG_NUMA
 228         struct ia64_node_data *node_data;
 229 #endif
 230 };
 231
 232 DECLARE_PER_CPU(struct cpuinfo_ia64, cpu_info);
 233
 234 /*
 235  * The "local" data variable.  It refers to the per-CPU data of the currently executing
 236  * CPU, much like "current" points to the per-task data of the currently executing task.
 237  * Do not use the address of local_cpu_data, since it will be different from
 238  * cpu_data(smp_processor_id())!
 239  */
 240 #define local_cpu_data          (&__ia64_per_cpu_var(cpu_info))
 241 #define cpu_data(cpu)           (&per_cpu(cpu_info, cpu))
 242
 243 extern void print_cpu_info (struct cpuinfo_ia64 *);
 244
 245 typedef struct {
 246         unsigned long seg;
 247 } mm_segment_t;
 248
 249 #define SET_UNALIGN_CTL(task,value)                                                             \
 250 ({                                                                                              \
 251         (task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_UAC_MASK)                  \
 252                                 | (((value) << IA64_THREAD_UAC_SHIFT) & IA64_THREAD_UAC_MASK)); \
 253         0;                                                                                      \
 254 })
 255 #define GET_UNALIGN_CTL(task,addr)                                                              \
 256 ({                                                                                              \
 257         put_user(((task)->thread.flags & IA64_THREAD_UAC_MASK) >> IA64_THREAD_UAC_SHIFT,        \
 258                  (int __user *) (addr));                                                        \
 259 })
 260
 261 #define SET_FPEMU_CTL(task,value)                                                               \
 262 ({                                                                                              \
 263         (task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_FPEMU_MASK)                \
 264                           | (((value) << IA64_THREAD_FPEMU_SHIFT) & IA64_THREAD_FPEMU_MASK));   \
 265         0;                                                                                      \
 266 })
 267 #define GET_FPEMU_CTL(task,addr)                                                                \
 268 ({                                                                                              \
 269         put_user(((task)->thread.flags & IA64_THREAD_FPEMU_MASK) >> IA64_THREAD_FPEMU_SHIFT,    \
 270                  (int __user *) (addr));                                                        \
 271 })
 272
 273 #ifdef CONFIG_IA32_SUPPORT
 274 struct desc_struct {
 275         unsigned int a, b;
 276 };
 277
 278 #define desc_empty(desc)                (!((desc)->a | (desc)->b))
 279 #define desc_equal(desc1, desc2)        (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
 280
 281 #define GDT_ENTRY_TLS_ENTRIES   3
 282 #define GDT_ENTRY_TLS_MIN       6
 283 #define GDT_ENTRY_TLS_MAX       (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
 284
 285 #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
 286
 287 struct ia64_partial_page_list;
 288 #endif
 289
 290 struct thread_struct {
 291         __u32 flags;                    /* various thread flags (see IA64_THREAD_*) */
 292         /* writing on_ustack is performance-critical, so it's worth spending 8 bits on it... */
 293         __u8 on_ustack;                 /* executing on user-stacks? */
 294         __u8 pad[3];
 295         __u64 ksp;                      /* kernel stack pointer */
 296         __u64 map_base;                 /* base address for get_unmapped_area() */
 297         __u64 task_size;                /* limit for task size */
 298         __u64 rbs_bot;                  /* the base address for the RBS */
 299         int last_fph_cpu;               /* CPU that may hold the contents of f32-f127 */
 300
 301 #ifdef CONFIG_IA32_SUPPORT
 302         __u64 eflag;                    /* IA32 EFLAGS reg */
 303         __u64 fsr;                      /* IA32 floating pt status reg */
 304         __u64 fcr;                      /* IA32 floating pt control reg */
 305         __u64 fir;                      /* IA32 fp except. instr. reg */
 306         __u64 fdr;                      /* IA32 fp except. data reg */
 307         __u64 old_k1;                   /* old value of ar.k1 */
 308         __u64 old_iob;                  /* old IOBase value */
 309         struct ia64_partial_page_list *ppl; /* partial page list for 4K page size issue */
 310         /* cached TLS descriptors. */
 311         struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 312
 313 # define INIT_THREAD_IA32       .eflag =        0,                      \
 314                                 .fsr =          0,                      \
 315                                 .fcr =          0x17800000037fULL,      \
 316                                 .fir =          0,                      \
 317                                 .fdr =          0,                      \
 318                                 .old_k1 =       0,                      \
 319                                 .old_iob =      0,                      \
 320                                 .ppl =          NULL,
 321 #else
 322 # define INIT_THREAD_IA32
 323 #endif /* CONFIG_IA32_SUPPORT */
 324 #ifdef CONFIG_PERFMON
 325         void *pfm_context;                   /* pointer to detailed PMU context */
 326         unsigned long pfm_needs_checking;    /* when >0, pending perfmon work on kernel exit */
 327 # define INIT_THREAD_PM         .pfm_context =          NULL,     \
 328                                 .pfm_needs_checking =   0UL,
 329 #else
 330 # define INIT_THREAD_PM
 331 #endif
 332         __u64 dbr[IA64_NUM_DBG_REGS];
 333         __u64 ibr[IA64_NUM_DBG_REGS];
 334         struct ia64_fpreg fph[96];      /* saved/loaded on demand */
 335 };
 336
 337 #define INIT_THREAD {                                           \
 338         .flags =        0,                                      \
 339         .on_ustack =    0,                                      \
 340         .ksp =          0,                                      \
 341         .map_base =     DEFAULT_MAP_BASE,                       \
 342         .rbs_bot =      STACK_TOP - DEFAULT_USER_STACK_SIZE,    \
 343         .task_size =    DEFAULT_TASK_SIZE,                      \
 344         .last_fph_cpu =  -1,                                    \
 345         INIT_THREAD_IA32                                        \
 346         INIT_THREAD_PM                                          \
 347         .dbr =          {0, },                                  \
 348         .ibr =          {0, },                                  \
 349         .fph =          {{{{0}}}, }                             \
 350 }
 351
 352 #define start_thread(regs,new_ip,new_sp) do {                                                   \
 353         set_fs(USER_DS);                                                                        \
 354         regs->cr_ipsr = ((regs->cr_ipsr | (IA64_PSR_BITS_TO_SET | IA64_PSR_CPL))                \
 355                          & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_RI | IA64_PSR_IS));              \
 356         regs->cr_iip = new_ip;                                                                  \
 357         regs->ar_rsc = 0xf;             /* eager mode, privilege level 3 */                     \
 358         regs->ar_rnat = 0;                                                                      \
 359         regs->ar_bspstore = current->thread.rbs_bot;                                            \
 360         regs->ar_fpsr = FPSR_DEFAULT;                                                           \
 361         regs->loadrs = 0;                                                                       \
 362         regs->r8 = get_dumpable(current->mm);   /* set "don't zap registers" flag */            \
 363         regs->r12 = new_sp - 16;        /* allocate 16 byte scratch area */                     \
 364         if (unlikely(!get_dumpable(current->mm))) {                                                     \
 365                 /*                                                                              \
 366                  * Zap scratch regs to avoid leaking bits between processes with different      \
 367                  * uid/privileges.                                                              \
 368                  */                                                                             \
 369                 regs->ar_pfs = 0; regs->b0 = 0; regs->pr = 0;                                   \
 370                 regs->r1 = 0; regs->r9  = 0; regs->r11 = 0; regs->r13 = 0; regs->r15 = 0;       \
 371         }                                                                                       \
 372 } while (0)
 373
 374 /* Forward declarations, a strange C thing... */
 375 struct mm_struct;
 376 struct task_struct;
 377
 378 /*
 379  * Free all resources held by a thread. This is called after the
 380  * parent of DEAD_TASK has collected the exit status of the task via
 381  * wait().
 382  */
 383 #define release_thread(dead_task)
 384
 385 /* Prepare to copy thread state - unlazy all lazy status */
 386 #define prepare_to_copy(tsk)    do { } while (0)
 387
 388 /*
 389  * This is the mechanism for creating a new kernel thread.
 390  *
 391  * NOTE 1: Only a kernel-only process (ie the swapper or direct
 392  * descendants who haven't done an "execve()") should use this: it
 393  * will work within a system call from a "real" process, but the
 394  * process memory space will not be free'd until both the parent and
 395  * the child have exited.
 396  *
 397  * NOTE 2: This MUST NOT be an inlined function.  Otherwise, we get
 398  * into trouble in init/main.c when the child thread returns to
 399  * do_basic_setup() and the timing is such that free_initmem() has
 400  * been called already.
 401  */
 402 extern pid_t kernel_thread (int (*fn)(void *), void *arg, unsigned long flags);
 403
 404 /* Get wait channel for task P.  */
 405 extern unsigned long get_wchan (struct task_struct *p);
 406
 407 /* Return instruction pointer of blocked task TSK.  */
 408 #define KSTK_EIP(tsk)                                   \
 409   ({                                                    \
 410         struct pt_regs *_regs = task_pt_regs(tsk);      \
 411         _regs->cr_iip + ia64_psr(_regs)->ri;            \
 412   })
 413
 414 /* Return stack pointer of blocked task TSK.  */
 415 #define KSTK_ESP(tsk)  ((tsk)->thread.ksp)
 416
 417 extern void ia64_getreg_unknown_kr (void);
 418 extern void ia64_setreg_unknown_kr (void);
 419
 420 #define ia64_get_kr(regnum)                                     \
 421 ({                                                              \
 422         unsigned long r = 0;                                    \
 423                                                                 \
 424         switch (regnum) {                                       \
 425             case 0: r = ia64_getreg(_IA64_REG_AR_KR0); break;   \
 426             case 1: r = ia64_getreg(_IA64_REG_AR_KR1); break;   \
 427             case 2: r = ia64_getreg(_IA64_REG_AR_KR2); break;   \
 428             case 3: r = ia64_getreg(_IA64_REG_AR_KR3); break;   \
 429             case 4: r = ia64_getreg(_IA64_REG_AR_KR4); break;   \
 430             case 5: r = ia64_getreg(_IA64_REG_AR_KR5); break;   \
 431             case 6: r = ia64_getreg(_IA64_REG_AR_KR6); break;   \
 432             case 7: r = ia64_getreg(_IA64_REG_AR_KR7); break;   \
 433             default: ia64_getreg_unknown_kr(); break;           \
 434         }                                                       \
 435         r;                                                      \
 436 })
 437
 438 #define ia64_set_kr(regnum, r)                                  \
 439 ({                                                              \
 440         switch (regnum) {                                       \
 441             case 0: ia64_setreg(_IA64_REG_AR_KR0, r); break;    \
 442             case 1: ia64_setreg(_IA64_REG_AR_KR1, r); break;    \
 443             case 2: ia64_setreg(_IA64_REG_AR_KR2, r); break;    \
 444             case 3: ia64_setreg(_IA64_REG_AR_KR3, r); break;    \
 445             case 4: ia64_setreg(_IA64_REG_AR_KR4, r); break;    \
 446             case 5: ia64_setreg(_IA64_REG_AR_KR5, r); break;    \
 447             case 6: ia64_setreg(_IA64_REG_AR_KR6, r); break;    \
 448             case 7: ia64_setreg(_IA64_REG_AR_KR7, r); break;    \
 449             default: ia64_setreg_unknown_kr(); break;           \
 450         }                                                       \
 451 })
 452
 453 /*
 454  * The following three macros can't be inline functions because we don't have struct
 455  * task_struct at this point.
 456  */
 457
 458 /*
 459  * Return TRUE if task T owns the fph partition of the CPU we're running on.
 460  * Must be called from code that has preemption disabled.
 461  */
 462 #define ia64_is_local_fpu_owner(t)                                                              \
 463 ({                                                                                              \
 464         struct task_struct *__ia64_islfo_task = (t);                                            \
 465         (__ia64_islfo_task->thread.last_fph_cpu == smp_processor_id()                           \
 466          && __ia64_islfo_task == (struct task_struct *) ia64_get_kr(IA64_KR_FPU_OWNER));        \
 467 })
 468
 469 /*
 470  * Mark task T as owning the fph partition of the CPU we're running on.
 471  * Must be called from code that has preemption disabled.
 472  */
 473 #define ia64_set_local_fpu_owner(t) do {                                                \
 474         struct task_struct *__ia64_slfo_task = (t);                                     \
 475         __ia64_slfo_task->thread.last_fph_cpu = smp_processor_id();                     \
 476         ia64_set_kr(IA64_KR_FPU_OWNER, (unsigned long) __ia64_slfo_task);               \
 477 } while (0)
 478
 479 /* Mark the fph partition of task T as being invalid on all CPUs.  */
 480 #define ia64_drop_fpu(t)        ((t)->thread.last_fph_cpu = -1)
 481
 482 extern void __ia64_init_fpu (void);
 483 extern void __ia64_save_fpu (struct ia64_fpreg *fph);
 484 extern void __ia64_load_fpu (struct ia64_fpreg *fph);
 485 extern void ia64_save_debug_regs (unsigned long *save_area);
 486 extern void ia64_load_debug_regs (unsigned long *save_area);
 487
 488 #ifdef CONFIG_IA32_SUPPORT
 489 extern void ia32_save_state (struct task_struct *task);
 490 extern void ia32_load_state (struct task_struct *task);
 491 #endif
 492
 493 #define ia64_fph_enable()       do { ia64_rsm(IA64_PSR_DFH); ia64_srlz_d(); } while (0)
 494 #define ia64_fph_disable()      do { ia64_ssm(IA64_PSR_DFH); ia64_srlz_d(); } while (0)
 495
 496 /* load fp 0.0 into fph */
 497 static inline void
 498 ia64_init_fpu (void) {
 499         ia64_fph_enable();
 500         __ia64_init_fpu();
 501         ia64_fph_disable();
 502 }
 503
 504 /* save f32-f127 at FPH */
 505 static inline void
 506 ia64_save_fpu (struct ia64_fpreg *fph) {
 507         ia64_fph_enable();
 508         __ia64_save_fpu(fph);
 509         ia64_fph_disable();
 510 }
 511
 512 /* load f32-f127 from FPH */
 513 static inline void
 514 ia64_load_fpu (struct ia64_fpreg *fph) {
 515         ia64_fph_enable();
 516         __ia64_load_fpu(fph);
 517         ia64_fph_disable();
 518 }
 519
 520 static inline __u64
 521 ia64_clear_ic (void)
 522 {
 523         __u64 psr;
 524         psr = ia64_getreg(_IA64_REG_PSR);
 525         ia64_stop();
 526         ia64_rsm(IA64_PSR_I | IA64_PSR_IC);
 527         ia64_srlz_i();
 528         return psr;
 529 }
 530
 531 /*
 532  * Restore the psr.
 533  */
 534 static inline void
 535 ia64_set_psr (__u64 psr)
 536 {
 537         ia64_stop();
 538         ia64_setreg(_IA64_REG_PSR_L, psr);
 539         ia64_srlz_i();
 540 }
 541
 542 /*
 543  * Insert a translation into an instruction and/or data translation
 544  * register.
 545  */
 546 static inline void
 547 ia64_itr (__u64 target_mask, __u64 tr_num,
 548           __u64 vmaddr, __u64 pte,
 549           __u64 log_page_size)
 550 {
 551         ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2));
 552         ia64_setreg(_IA64_REG_CR_IFA, vmaddr);
 553         ia64_stop();
 554         if (target_mask & 0x1)
 555                 ia64_itri(tr_num, pte);
 556         if (target_mask & 0x2)
 557                 ia64_itrd(tr_num, pte);
 558 }
 559
 560 /*
 561  * Insert a translation into the instruction and/or data translation
 562  * cache.
 563  */
 564 static inline void
 565 ia64_itc (__u64 target_mask, __u64 vmaddr, __u64 pte,
 566           __u64 log_page_size)
 567 {
 568         ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2));
 569         ia64_setreg(_IA64_REG_CR_IFA, vmaddr);
 570         ia64_stop();
 571         /* as per EAS2.6, itc must be the last instruction in an instruction group */
 572         if (target_mask & 0x1)
 573                 ia64_itci(pte);
 574         if (target_mask & 0x2)
 575                 ia64_itcd(pte);
 576 }
 577
 578 /*
 579  * Purge a range of addresses from instruction and/or data translation
 580  * register(s).
 581  */
 582 static inline void
 583 ia64_ptr (__u64 target_mask, __u64 vmaddr, __u64 log_size)
 584 {
 585         if (target_mask & 0x1)
 586                 ia64_ptri(vmaddr, (log_size << 2));
 587         if (target_mask & 0x2)
 588                 ia64_ptrd(vmaddr, (log_size << 2));
 589 }
 590
 591 /* Set the interrupt vector address.  The address must be suitably aligned (32KB).  */
 592 static inline void
 593 ia64_set_iva (void *ivt_addr)
 594 {
 595         ia64_setreg(_IA64_REG_CR_IVA, (__u64) ivt_addr);
 596         ia64_srlz_i();
 597 }
 598
 599 /* Set the page table address and control bits.  */
 600 static inline void
 601 ia64_set_pta (__u64 pta)
 602 {
 603         /* Note: srlz.i implies srlz.d */
 604         ia64_setreg(_IA64_REG_CR_PTA, pta);
 605         ia64_srlz_i();
 606 }
 607
 608 static inline void
 609 ia64_eoi (void)
 610 {
 611         ia64_setreg(_IA64_REG_CR_EOI, 0);
 612         ia64_srlz_d();
 613 }
 614
 615 #define cpu_relax()     ia64_hint(ia64_hint_pause)
 616
 617 static inline int
 618 ia64_get_irr(unsigned int vector)
 619 {
 620         unsigned int reg = vector / 64;
 621         unsigned int bit = vector % 64;
 622         u64 irr;
 623
 624         switch (reg) {
 625         case 0: irr = ia64_getreg(_IA64_REG_CR_IRR0); break;
 626         case 1: irr = ia64_getreg(_IA64_REG_CR_IRR1); break;
 627         case 2: irr = ia64_getreg(_IA64_REG_CR_IRR2); break;
 628         case 3: irr = ia64_getreg(_IA64_REG_CR_IRR3); break;
 629         }
 630
 631         return test_bit(bit, &irr);
 632 }
 633
 634 static inline void
 635 ia64_set_lrr0 (unsigned long val)
 636 {
 637         ia64_setreg(_IA64_REG_CR_LRR0, val);
 638         ia64_srlz_d();
 639 }
 640
 641 static inline void
 642 ia64_set_lrr1 (unsigned long val)
 643 {
 644         ia64_setreg(_IA64_REG_CR_LRR1, val);
 645         ia64_srlz_d();
 646 }
 647
 648
 649 /*
 650  * Given the address to which a spill occurred, return the unat bit
 651  * number that corresponds to this address.
 652  */
 653 static inline __u64
 654 ia64_unat_pos (void *spill_addr)
 655 {
 656         return ((__u64) spill_addr >> 3) & 0x3f;
 657 }
 658
 659 /*
 660  * Set the NaT bit of an integer register which was spilled at address
 661  * SPILL_ADDR.  UNAT is the mask to be updated.
 662  */
 663 static inline void
 664 ia64_set_unat (__u64 *unat, void *spill_addr, unsigned long nat)
 665 {
 666         __u64 bit = ia64_unat_pos(spill_addr);
 667         __u64 mask = 1UL << bit;
 668
 669         *unat = (*unat & ~mask) | (nat << bit);
 670 }
 671
 672 /*
 673  * Return saved PC of a blocked thread.
 674  * Note that the only way T can block is through a call to schedule() -> switch_to().
 675  */
 676 static inline unsigned long
 677 thread_saved_pc (struct task_struct *t)
 678 {
 679         struct unw_frame_info info;
 680         unsigned long ip;
 681
 682         unw_init_from_blocked_task(&info, t);
 683         if (unw_unwind(&info) < 0)
 684                 return 0;
 685         unw_get_ip(&info, &ip);
 686         return ip;
 687 }
 688
 689 /*
 690  * Get the current instruction/program counter value.
 691  */
 692 #define current_text_addr() \
 693         ({ void *_pc; _pc = (void *)ia64_getreg(_IA64_REG_IP); _pc; })
 694
 695 static inline __u64
 696 ia64_get_ivr (void)
 697 {
 698         __u64 r;
 699         ia64_srlz_d();
 700         r = ia64_getreg(_IA64_REG_CR_IVR);
 701         ia64_srlz_d();
 702         return r;
 703 }
 704
 705 static inline void
 706 ia64_set_dbr (__u64 regnum, __u64 value)
 707 {
 708         __ia64_set_dbr(regnum, value);
 709 #ifdef CONFIG_ITANIUM
 710         ia64_srlz_d();
 711 #endif
 712 }
 713
 714 static inline __u64
 715 ia64_get_dbr (__u64 regnum)
 716 {
 717         __u64 retval;
 718
 719         retval = __ia64_get_dbr(regnum);
 720 #ifdef CONFIG_ITANIUM
 721         ia64_srlz_d();
 722 #endif
 723         return retval;
 724 }
 725
 726 static inline __u64
 727 ia64_rotr (__u64 w, __u64 n)
 728 {
 729         return (w >> n) | (w << (64 - n));
 730 }
 731
 732 #define ia64_rotl(w,n)  ia64_rotr((w), (64) - (n))
 733
 734 /*
 735  * Take a mapped kernel address and return the equivalent address
 736  * in the region 7 identity mapped virtual area.
 737  */
 738 static inline void *
 739 ia64_imva (void *addr)
 740 {
 741         void *result;
 742         result = (void *) ia64_tpa(addr);
 743         return __va(result);
 744 }
 745
 746 #define ARCH_HAS_PREFETCH
 747 #define ARCH_HAS_PREFETCHW
 748 #define ARCH_HAS_SPINLOCK_PREFETCH
 749 #define PREFETCH_STRIDE                 L1_CACHE_BYTES
 750
 751 static inline void
 752 prefetch (const void *x)
 753 {
 754          ia64_lfetch(ia64_lfhint_none, x);
 755 }
 756
 757 static inline void
 758 prefetchw (const void *x)
 759 {
 760         ia64_lfetch_excl(ia64_lfhint_none, x);
 761 }
 762
 763 #define spin_lock_prefetch(x)   prefetchw(x)
 764
 765 extern unsigned long boot_option_idle_override;
 766
 767 #endif /* !__ASSEMBLY__ */
 768
 769 #endif /* _ASM_IA64_PROCESSOR_H */