1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_IA64_PROCESSOR_H
3 #define _ASM_IA64_PROCESSOR_H
4
5 /*
6 * Copyright (C) 1998-2004 Hewlett-Packard Co
7 * David Mosberger-Tang <davidm@hpl.hp.com>
8 * Stephane Eranian <eranian@hpl.hp.com>
9 * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>
10 * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
11 *
12 * 11/24/98 S.Eranian added ia64_set_iva()
13 * 12/03/99 D. Mosberger implement thread_saved_pc() via kernel unwind API
14 * 06/16/00 A. Mallick added csd/ssd/tssd for ia32 support
15 */
16
17
18 #include <asm/intrinsics.h>
19 #include <asm/kregs.h>
20 #include <asm/ptrace.h>
21 #include <asm/ustack.h>
22
23 #define IA64_NUM_PHYS_STACK_REG 96
24 #define IA64_NUM_DBG_REGS 8
25
26 #define DEFAULT_MAP_BASE __IA64_UL_CONST(0x2000000000000000)
27 #define DEFAULT_TASK_SIZE __IA64_UL_CONST(0xa000000000000000)
28
29 /*
30 * TASK_SIZE really is a mis-named. It really is the maximum user
31 * space address (plus one). On IA-64, there are five regions of 2TB
32 * each (assuming 8KB page size), for a total of 8TB of user virtual
33 * address space.
34 */
35 #define TASK_SIZE DEFAULT_TASK_SIZE
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 #include <linux/bitops.h>
73
74 #include <asm/fpu.h>
75 #include <asm/page.h>
76 #include <asm/percpu.h>
77 #include <asm/rse.h>
78 #include <asm/unwind.h>
79 #include <linux/atomic.h>
80 #ifdef CONFIG_NUMA
81 #include <asm/nodedata.h>
82 #endif
83
84 /* like above but expressed as bitfields for more efficient access: */
85 struct ia64_psr {
86 __u64 reserved0 : 1;
87 __u64 be : 1;
88 __u64 up : 1;
89 __u64 ac : 1;
90 __u64 mfl : 1;
91 __u64 mfh : 1;
92 __u64 reserved1 : 7;
93 __u64 ic : 1;
94 __u64 i : 1;
95 __u64 pk : 1;
96 __u64 reserved2 : 1;
97 __u64 dt : 1;
98 __u64 dfl : 1;
99 __u64 dfh : 1;
100 __u64 sp : 1;
101 __u64 pp : 1;
102 __u64 di : 1;
103 __u64 si : 1;
104 __u64 db : 1;
105 __u64 lp : 1;
106 __u64 tb : 1;
107 __u64 rt : 1;
108 __u64 reserved3 : 4;
109 __u64 cpl : 2;
110 __u64 is : 1;
111 __u64 mc : 1;
112 __u64 it : 1;
113 __u64 id : 1;
114 __u64 da : 1;
115 __u64 dd : 1;
116 __u64 ss : 1;
117 __u64 ri : 2;
118 __u64 ed : 1;
119 __u64 bn : 1;
120 __u64 reserved4 : 19;
121 };
122
123 union ia64_isr {
124 __u64 val;
125 struct {
126 __u64 code : 16;
127 __u64 vector : 8;
128 __u64 reserved1 : 8;
129 __u64 x : 1;
130 __u64 w : 1;
131 __u64 r : 1;
132 __u64 na : 1;
133 __u64 sp : 1;
134 __u64 rs : 1;
135 __u64 ir : 1;
136 __u64 ni : 1;
137 __u64 so : 1;
138 __u64 ei : 2;
139 __u64 ed : 1;
140 __u64 reserved2 : 20;
141 };
142 };
143
144 union ia64_lid {
145 __u64 val;
146 struct {
147 __u64 rv : 16;
148 __u64 eid : 8;
149 __u64 id : 8;
150 __u64 ig : 32;
151 };
152 };
153
154 union ia64_tpr {
155 __u64 val;
156 struct {
157 __u64 ig0 : 4;
158 __u64 mic : 4;
159 __u64 rsv : 8;
160 __u64 mmi : 1;
161 __u64 ig1 : 47;
162 };
163 };
164
165 union ia64_itir {
166 __u64 val;
167 struct {
168 __u64 rv3 : 2; /* 0-1 */
169 __u64 ps : 6; /* 2-7 */
170 __u64 key : 24; /* 8-31 */
171 __u64 rv4 : 32; /* 32-63 */
172 };
173 };
174
175 union ia64_rr {
176 __u64 val;
177 struct {
178 __u64 ve : 1; /* enable hw walker */
179 __u64 reserved0: 1; /* reserved */
180 __u64 ps : 6; /* log page size */
181 __u64 rid : 24; /* region id */
182 __u64 reserved1: 32; /* reserved */
183 };
184 };
185
186 /*
187 * CPU type, hardware bug flags, and per-CPU state. Frequently used
188 * state comes earlier:
189 */
190 struct cpuinfo_ia64 {
191 unsigned int softirq_pending;
192 unsigned long itm_delta; /* # of clock cycles between clock ticks */
193 unsigned long itm_next; /* interval timer mask value to use for next clock tick */
194 unsigned long nsec_per_cyc; /* (1000000000<<IA64_NSEC_PER_CYC_SHIFT)/itc_freq */
195 unsigned long unimpl_va_mask; /* mask of unimplemented virtual address bits (from PAL) */
196 unsigned long unimpl_pa_mask; /* mask of unimplemented physical address bits (from PAL) */
197 unsigned long itc_freq; /* frequency of ITC counter */
198 unsigned long proc_freq; /* frequency of processor */
199 unsigned long cyc_per_usec; /* itc_freq/1000000 */
200 unsigned long ptce_base;
201 unsigned int ptce_count[2];
202 unsigned int ptce_stride[2];
203 struct task_struct *ksoftirqd; /* kernel softirq daemon for this CPU */
204
205 #ifdef CONFIG_SMP
206 unsigned long loops_per_jiffy;
207 int cpu;
208 unsigned int socket_id; /* physical processor socket id */
209 unsigned short core_id; /* core id */
210 unsigned short thread_id; /* thread id */
211 unsigned short num_log; /* Total number of logical processors on
212 * this socket that were successfully booted */
213 unsigned char cores_per_socket; /* Cores per processor socket */
214 unsigned char threads_per_core; /* Threads per core */
215 #endif
216
217 /* CPUID-derived information: */
218 unsigned long ppn;
219 unsigned long features;
220 unsigned char number;
221 unsigned char revision;
222 unsigned char model;
223 unsigned char family;
224 unsigned char archrev;
225 char vendor[16];
226 char *model_name;
227
228 #ifdef CONFIG_NUMA
229 struct ia64_node_data *node_data;
230 #endif
231 };
232
233 DECLARE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info);
234
235 /*
236 * The "local" data variable. It refers to the per-CPU data of the currently executing
237 * CPU, much like "current" points to the per-task data of the currently executing task.
238 * Do not use the address of local_cpu_data, since it will be different from
239 * cpu_data(smp_processor_id())!
240 */
241 #define local_cpu_data (&__ia64_per_cpu_var(ia64_cpu_info))
242 #define cpu_data(cpu) (&per_cpu(ia64_cpu_info, cpu))
243
244 extern void print_cpu_info (struct cpuinfo_ia64 *);
245
246 typedef struct {
247 unsigned long seg;
248 } mm_segment_t;
249
250 #define SET_UNALIGN_CTL(task,value) \
251 ({ \
252 (task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_UAC_MASK) \
253 | (((value) << IA64_THREAD_UAC_SHIFT) & IA64_THREAD_UAC_MASK)); \
254 0; \
255 })
256 #define GET_UNALIGN_CTL(task,addr) \
257 ({ \
258 put_user(((task)->thread.flags & IA64_THREAD_UAC_MASK) >> IA64_THREAD_UAC_SHIFT, \
259 (int __user *) (addr)); \
260 })
261
262 #define SET_FPEMU_CTL(task,value) \
263 ({ \
264 (task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_FPEMU_MASK) \
265 | (((value) << IA64_THREAD_FPEMU_SHIFT) & IA64_THREAD_FPEMU_MASK)); \
266 0; \
267 })
268 #define GET_FPEMU_CTL(task,addr) \
269 ({ \
270 put_user(((task)->thread.flags & IA64_THREAD_FPEMU_MASK) >> IA64_THREAD_FPEMU_SHIFT, \
271 (int __user *) (addr)); \
272 })
273
274 struct thread_struct {
275 __u32 flags; /* various thread flags (see IA64_THREAD_*) */
276 /* writing on_ustack is performance-critical, so it's worth spending 8 bits on it... */
277 __u8 on_ustack; /* executing on user-stacks? */
278 __u8 pad[3];
279 __u64 ksp; /* kernel stack pointer */
280 __u64 map_base; /* base address for get_unmapped_area() */
281 __u64 rbs_bot; /* the base address for the RBS */
282 int last_fph_cpu; /* CPU that may hold the contents of f32-f127 */
283
284 #ifdef CONFIG_PERFMON
285 void *pfm_context; /* pointer to detailed PMU context */
286 unsigned long pfm_needs_checking; /* when >0, pending perfmon work on kernel exit */
287 # define INIT_THREAD_PM .pfm_context = NULL, \
288 .pfm_needs_checking = 0UL,
289 #else
290 # define INIT_THREAD_PM
291 #endif
292 unsigned long dbr[IA64_NUM_DBG_REGS];
293 unsigned long ibr[IA64_NUM_DBG_REGS];
294 struct ia64_fpreg fph[96]; /* saved/loaded on demand */
295 };
296
297 #define INIT_THREAD { \
298 .flags = 0, \
299 .on_ustack = 0, \
300 .ksp = 0, \
301 .map_base = DEFAULT_MAP_BASE, \
302 .rbs_bot = STACK_TOP - DEFAULT_USER_STACK_SIZE, \
303 .last_fph_cpu = -1, \
304 INIT_THREAD_PM \
305 .dbr = {0, }, \
306 .ibr = {0, }, \
307 .fph = {{{{0}}}, } \
308 }
309
310 #define start_thread(regs,new_ip,new_sp) do { \
311 regs->cr_ipsr = ((regs->cr_ipsr | (IA64_PSR_BITS_TO_SET | IA64_PSR_CPL)) \
312 & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_RI | IA64_PSR_IS)); \
313 regs->cr_iip = new_ip; \
314 regs->ar_rsc = 0xf; /* eager mode, privilege level 3 */ \
315 regs->ar_rnat = 0; \
316 regs->ar_bspstore = current->thread.rbs_bot; \
317 regs->ar_fpsr = FPSR_DEFAULT; \
318 regs->loadrs = 0; \
319 regs->r8 = get_dumpable(current->mm); /* set "don't zap registers" flag */ \
320 regs->r12 = new_sp - 16; /* allocate 16 byte scratch area */ \
321 if (unlikely(get_dumpable(current->mm) != SUID_DUMP_USER)) { \
322 /* \
323 * Zap scratch regs to avoid leaking bits between processes with different \
324 * uid/privileges. \
325 */ \
326 regs->ar_pfs = 0; regs->b0 = 0; regs->pr = 0; \
327 regs->r1 = 0; regs->r9 = 0; regs->r11 = 0; regs->r13 = 0; regs->r15 = 0; \
328 } \
329 } while (0)
330
331 /* Forward declarations, a strange C thing... */
332 struct mm_struct;
333 struct task_struct;
334
335 /*
336 * Free all resources held by a thread. This is called after the
337 * parent of DEAD_TASK has collected the exit status of the task via
338 * wait().
339 */
340 #define release_thread(dead_task)
341
342 /* Get wait channel for task P. */
343 extern unsigned long get_wchan (struct task_struct *p);
344
345 /* Return instruction pointer of blocked task TSK. */
346 #define KSTK_EIP(tsk) \
347 ({ \
348 struct pt_regs *_regs = task_pt_regs(tsk); \
349 _regs->cr_iip + ia64_psr(_regs)->ri; \
350 })
351
352 /* Return stack pointer of blocked task TSK. */
353 #define KSTK_ESP(tsk) ((tsk)->thread.ksp)
354
355 extern void ia64_getreg_unknown_kr (void);
356 extern void ia64_setreg_unknown_kr (void);
357
358 #define ia64_get_kr(regnum) \
359 ({ \
360 unsigned long r = 0; \
361 \
362 switch (regnum) { \
363 case 0: r = ia64_getreg(_IA64_REG_AR_KR0); break; \
364 case 1: r = ia64_getreg(_IA64_REG_AR_KR1); break; \
365 case 2: r = ia64_getreg(_IA64_REG_AR_KR2); break; \
366 case 3: r = ia64_getreg(_IA64_REG_AR_KR3); break; \
367 case 4: r = ia64_getreg(_IA64_REG_AR_KR4); break; \
368 case 5: r = ia64_getreg(_IA64_REG_AR_KR5); break; \
369 case 6: r = ia64_getreg(_IA64_REG_AR_KR6); break; \
370 case 7: r = ia64_getreg(_IA64_REG_AR_KR7); break; \
371 default: ia64_getreg_unknown_kr(); break; \
372 } \
373 r; \
374 })
375
376 #define ia64_set_kr(regnum, r) \
377 ({ \
378 switch (regnum) { \
379 case 0: ia64_setreg(_IA64_REG_AR_KR0, r); break; \
380 case 1: ia64_setreg(_IA64_REG_AR_KR1, r); break; \
381 case 2: ia64_setreg(_IA64_REG_AR_KR2, r); break; \
382 case 3: ia64_setreg(_IA64_REG_AR_KR3, r); break; \
383 case 4: ia64_setreg(_IA64_REG_AR_KR4, r); break; \
384 case 5: ia64_setreg(_IA64_REG_AR_KR5, r); break; \
385 case 6: ia64_setreg(_IA64_REG_AR_KR6, r); break; \
386 case 7: ia64_setreg(_IA64_REG_AR_KR7, r); break; \
387 default: ia64_setreg_unknown_kr(); break; \
388 } \
389 })
390
391 /*
392 * The following three macros can't be inline functions because we don't have struct
393 * task_struct at this point.
394 */
395
396 /*
397 * Return TRUE if task T owns the fph partition of the CPU we're running on.
398 * Must be called from code that has preemption disabled.
399 */
400 #define ia64_is_local_fpu_owner(t) \
401 ({ \
402 struct task_struct *__ia64_islfo_task = (t); \
403 (__ia64_islfo_task->thread.last_fph_cpu == smp_processor_id() \
404 && __ia64_islfo_task == (struct task_struct *) ia64_get_kr(IA64_KR_FPU_OWNER)); \
405 })
406
407 /*
408 * Mark task T as owning the fph partition of the CPU we're running on.
409 * Must be called from code that has preemption disabled.
410 */
411 #define ia64_set_local_fpu_owner(t) do { \
412 struct task_struct *__ia64_slfo_task = (t); \
413 __ia64_slfo_task->thread.last_fph_cpu = smp_processor_id(); \
414 ia64_set_kr(IA64_KR_FPU_OWNER, (unsigned long) __ia64_slfo_task); \
415 } while (0)
416
417 /* Mark the fph partition of task T as being invalid on all CPUs. */
418 #define ia64_drop_fpu(t) ((t)->thread.last_fph_cpu = -1)
419
420 extern void __ia64_init_fpu (void);
421 extern void __ia64_save_fpu (struct ia64_fpreg *fph);
422 extern void __ia64_load_fpu (struct ia64_fpreg *fph);
423 extern void ia64_save_debug_regs (unsigned long *save_area);
424 extern void ia64_load_debug_regs (unsigned long *save_area);
425
426 #define ia64_fph_enable() do { ia64_rsm(IA64_PSR_DFH); ia64_srlz_d(); } while (0)
427 #define ia64_fph_disable() do { ia64_ssm(IA64_PSR_DFH); ia64_srlz_d(); } while (0)
428
429 /* load fp 0.0 into fph */
430 static inline void
ia64_init_fpu(void)431 ia64_init_fpu (void) {
432 ia64_fph_enable();
433 __ia64_init_fpu();
434 ia64_fph_disable();
435 }
436
437 /* save f32-f127 at FPH */
438 static inline void
ia64_save_fpu(struct ia64_fpreg * fph)439 ia64_save_fpu (struct ia64_fpreg *fph) {
440 ia64_fph_enable();
441 __ia64_save_fpu(fph);
442 ia64_fph_disable();
443 }
444
445 /* load f32-f127 from FPH */
446 static inline void
ia64_load_fpu(struct ia64_fpreg * fph)447 ia64_load_fpu (struct ia64_fpreg *fph) {
448 ia64_fph_enable();
449 __ia64_load_fpu(fph);
450 ia64_fph_disable();
451 }
452
453 static inline __u64
ia64_clear_ic(void)454 ia64_clear_ic (void)
455 {
456 __u64 psr;
457 psr = ia64_getreg(_IA64_REG_PSR);
458 ia64_stop();
459 ia64_rsm(IA64_PSR_I | IA64_PSR_IC);
460 ia64_srlz_i();
461 return psr;
462 }
463
464 /*
465 * Restore the psr.
466 */
467 static inline void
ia64_set_psr(__u64 psr)468 ia64_set_psr (__u64 psr)
469 {
470 ia64_stop();
471 ia64_setreg(_IA64_REG_PSR_L, psr);
472 ia64_srlz_i();
473 }
474
475 /*
476 * Insert a translation into an instruction and/or data translation
477 * register.
478 */
479 static inline void
ia64_itr(__u64 target_mask,__u64 tr_num,__u64 vmaddr,__u64 pte,__u64 log_page_size)480 ia64_itr (__u64 target_mask, __u64 tr_num,
481 __u64 vmaddr, __u64 pte,
482 __u64 log_page_size)
483 {
484 ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2));
485 ia64_setreg(_IA64_REG_CR_IFA, vmaddr);
486 ia64_stop();
487 if (target_mask & 0x1)
488 ia64_itri(tr_num, pte);
489 if (target_mask & 0x2)
490 ia64_itrd(tr_num, pte);
491 }
492
493 /*
494 * Insert a translation into the instruction and/or data translation
495 * cache.
496 */
497 static inline void
ia64_itc(__u64 target_mask,__u64 vmaddr,__u64 pte,__u64 log_page_size)498 ia64_itc (__u64 target_mask, __u64 vmaddr, __u64 pte,
499 __u64 log_page_size)
500 {
501 ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2));
502 ia64_setreg(_IA64_REG_CR_IFA, vmaddr);
503 ia64_stop();
504 /* as per EAS2.6, itc must be the last instruction in an instruction group */
505 if (target_mask & 0x1)
506 ia64_itci(pte);
507 if (target_mask & 0x2)
508 ia64_itcd(pte);
509 }
510
511 /*
512 * Purge a range of addresses from instruction and/or data translation
513 * register(s).
514 */
515 static inline void
ia64_ptr(__u64 target_mask,__u64 vmaddr,__u64 log_size)516 ia64_ptr (__u64 target_mask, __u64 vmaddr, __u64 log_size)
517 {
518 if (target_mask & 0x1)
519 ia64_ptri(vmaddr, (log_size << 2));
520 if (target_mask & 0x2)
521 ia64_ptrd(vmaddr, (log_size << 2));
522 }
523
524 /* Set the interrupt vector address. The address must be suitably aligned (32KB). */
525 static inline void
ia64_set_iva(void * ivt_addr)526 ia64_set_iva (void *ivt_addr)
527 {
528 ia64_setreg(_IA64_REG_CR_IVA, (__u64) ivt_addr);
529 ia64_srlz_i();
530 }
531
532 /* Set the page table address and control bits. */
533 static inline void
ia64_set_pta(__u64 pta)534 ia64_set_pta (__u64 pta)
535 {
536 /* Note: srlz.i implies srlz.d */
537 ia64_setreg(_IA64_REG_CR_PTA, pta);
538 ia64_srlz_i();
539 }
540
541 static inline void
ia64_eoi(void)542 ia64_eoi (void)
543 {
544 ia64_setreg(_IA64_REG_CR_EOI, 0);
545 ia64_srlz_d();
546 }
547
548 #define cpu_relax() ia64_hint(ia64_hint_pause)
549
550 static inline int
ia64_get_irr(unsigned int vector)551 ia64_get_irr(unsigned int vector)
552 {
553 unsigned int reg = vector / 64;
554 unsigned int bit = vector % 64;
555 u64 irr;
556
557 switch (reg) {
558 case 0: irr = ia64_getreg(_IA64_REG_CR_IRR0); break;
559 case 1: irr = ia64_getreg(_IA64_REG_CR_IRR1); break;
560 case 2: irr = ia64_getreg(_IA64_REG_CR_IRR2); break;
561 case 3: irr = ia64_getreg(_IA64_REG_CR_IRR3); break;
562 }
563
564 return test_bit(bit, &irr);
565 }
566
567 static inline void
ia64_set_lrr0(unsigned long val)568 ia64_set_lrr0 (unsigned long val)
569 {
570 ia64_setreg(_IA64_REG_CR_LRR0, val);
571 ia64_srlz_d();
572 }
573
574 static inline void
ia64_set_lrr1(unsigned long val)575 ia64_set_lrr1 (unsigned long val)
576 {
577 ia64_setreg(_IA64_REG_CR_LRR1, val);
578 ia64_srlz_d();
579 }
580
581
582 /*
583 * Given the address to which a spill occurred, return the unat bit
584 * number that corresponds to this address.
585 */
586 static inline __u64
ia64_unat_pos(void * spill_addr)587 ia64_unat_pos (void *spill_addr)
588 {
589 return ((__u64) spill_addr >> 3) & 0x3f;
590 }
591
592 /*
593 * Set the NaT bit of an integer register which was spilled at address
594 * SPILL_ADDR. UNAT is the mask to be updated.
595 */
596 static inline void
ia64_set_unat(__u64 * unat,void * spill_addr,unsigned long nat)597 ia64_set_unat (__u64 *unat, void *spill_addr, unsigned long nat)
598 {
599 __u64 bit = ia64_unat_pos(spill_addr);
600 __u64 mask = 1UL << bit;
601
602 *unat = (*unat & ~mask) | (nat << bit);
603 }
604
605 static inline __u64
ia64_get_ivr(void)606 ia64_get_ivr (void)
607 {
608 __u64 r;
609 ia64_srlz_d();
610 r = ia64_getreg(_IA64_REG_CR_IVR);
611 ia64_srlz_d();
612 return r;
613 }
614
615 static inline void
ia64_set_dbr(__u64 regnum,__u64 value)616 ia64_set_dbr (__u64 regnum, __u64 value)
617 {
618 __ia64_set_dbr(regnum, value);
619 #ifdef CONFIG_ITANIUM
620 ia64_srlz_d();
621 #endif
622 }
623
624 static inline __u64
ia64_get_dbr(__u64 regnum)625 ia64_get_dbr (__u64 regnum)
626 {
627 __u64 retval;
628
629 retval = __ia64_get_dbr(regnum);
630 #ifdef CONFIG_ITANIUM
631 ia64_srlz_d();
632 #endif
633 return retval;
634 }
635
636 static inline __u64
ia64_rotr(__u64 w,__u64 n)637 ia64_rotr (__u64 w, __u64 n)
638 {
639 return (w >> n) | (w << (64 - n));
640 }
641
642 #define ia64_rotl(w,n) ia64_rotr((w), (64) - (n))
643
644 /*
645 * Take a mapped kernel address and return the equivalent address
646 * in the region 7 identity mapped virtual area.
647 */
648 static inline void *
ia64_imva(void * addr)649 ia64_imva (void *addr)
650 {
651 void *result;
652 result = (void *) ia64_tpa(addr);
653 return __va(result);
654 }
655
656 #define ARCH_HAS_PREFETCH
657 #define ARCH_HAS_PREFETCHW
658 #define ARCH_HAS_SPINLOCK_PREFETCH
659 #define PREFETCH_STRIDE L1_CACHE_BYTES
660
661 static inline void
prefetch(const void * x)662 prefetch (const void *x)
663 {
664 ia64_lfetch(ia64_lfhint_none, x);
665 }
666
667 static inline void
prefetchw(const void * x)668 prefetchw (const void *x)
669 {
670 ia64_lfetch_excl(ia64_lfhint_none, x);
671 }
672
673 #define spin_lock_prefetch(x) prefetchw(x)
674
675 extern unsigned long boot_option_idle_override;
676
677 enum idle_boot_override {IDLE_NO_OVERRIDE=0, IDLE_HALT, IDLE_FORCE_MWAIT,
678 IDLE_NOMWAIT, IDLE_POLL};
679
680 void default_idle(void);
681
682 #endif /* !__ASSEMBLY__ */
683
684 #endif /* _ASM_IA64_PROCESSOR_H */
685
