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fork: move the real prepare_to_copy() users to arch_dup_task_struct()
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / ia64 / include / asm / processor.h
CommitLineData
1da177e4
LT		 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
1da177e4
LT		 16
17#include <asm/intrinsics.h>
18#include <asm/kregs.h>
19#include <asm/ptrace.h>
20#include <asm/ustack.h>
21
c140d879
DH		 22#define __ARCH_WANT_UNLOCKED_CTXSW
23#define ARCH_HAS_PREFETCH_SWITCH_STACK
24
a0776ec8 25#define IA64_NUM_PHYS_STACK_REG 96
1da177e4 26#define IA64_NUM_DBG_REGS 8
1da177e4
LT		 27
28#define DEFAULT_MAP_BASE __IA64_UL_CONST(0x2000000000000000)
29#define DEFAULT_TASK_SIZE __IA64_UL_CONST(0xa000000000000000)
30
31/*
32 * TASK_SIZE really is a mis-named. It really is the maximum user
33 * space address (plus one). On IA-64, there are five regions of 2TB
34 * each (assuming 8KB page size), for a total of 8TB of user virtual
35 * address space.
36 */
82455257
DH		 37#define TASK_SIZE_OF(tsk) ((tsk)->thread.task_size)
38#define TASK_SIZE TASK_SIZE_OF(current)
1da177e4 39
1da177e4
LT		 40/*
41 * This decides where the kernel will search for a free chunk of vm
42 * space during mmap's.
43 */
44#define TASK_UNMAPPED_BASE (current->thread.map_base)
45
46#define IA64_THREAD_FPH_VALID (__IA64_UL(1) << 0) /* floating-point high state valid? */
47#define IA64_THREAD_DBG_VALID (__IA64_UL(1) << 1) /* debug registers valid? */
48#define IA64_THREAD_PM_VALID (__IA64_UL(1) << 2) /* performance registers valid? */
49#define IA64_THREAD_UAC_NOPRINT (__IA64_UL(1) << 3) /* don't log unaligned accesses */
50#define IA64_THREAD_UAC_SIGBUS (__IA64_UL(1) << 4) /* generate SIGBUS on unaligned acc. */
e08e6c52
BC		 51#define IA64_THREAD_MIGRATION (__IA64_UL(1) << 5) /* require migration
52 sync at ctx sw */
1da177e4
LT		 53#define IA64_THREAD_FPEMU_NOPRINT (__IA64_UL(1) << 6) /* don't log any fpswa faults */
54#define IA64_THREAD_FPEMU_SIGFPE (__IA64_UL(1) << 7) /* send a SIGFPE for fpswa faults */
55
56#define IA64_THREAD_UAC_SHIFT 3
57#define IA64_THREAD_UAC_MASK (IA64_THREAD_UAC_NOPRINT | IA64_THREAD_UAC_SIGBUS)
58#define IA64_THREAD_FPEMU_SHIFT 6
59#define IA64_THREAD_FPEMU_MASK (IA64_THREAD_FPEMU_NOPRINT | IA64_THREAD_FPEMU_SIGFPE)
60
61
62/*
63 * This shift should be large enough to be able to represent 1000000000/itc_freq with good
64 * accuracy while being small enough to fit 10*1000000000<<IA64_NSEC_PER_CYC_SHIFT in 64 bits
65 * (this will give enough slack to represent 10 seconds worth of time as a scaled number).
66 */
67#define IA64_NSEC_PER_CYC_SHIFT 30
68
69#ifndef __ASSEMBLY__
70
71#include <linux/cache.h>
72#include <linux/compiler.h>
73#include <linux/threads.h>
74#include <linux/types.h>
75
76#include <asm/fpu.h>
77#include <asm/page.h>
78#include <asm/percpu.h>
79#include <asm/rse.h>
80#include <asm/unwind.h>
60063497 81#include <linux/atomic.h>
1da177e4
LT		 82#ifdef CONFIG_NUMA
83#include <asm/nodedata.h>
84#endif
85
86/* like above but expressed as bitfields for more efficient access: */
87struct ia64_psr {
88 __u64 reserved0 : 1;
89 __u64 be : 1;
90 __u64 up : 1;
91 __u64 ac : 1;
92 __u64 mfl : 1;
93 __u64 mfh : 1;
94 __u64 reserved1 : 7;
95 __u64 ic : 1;
96 __u64 i : 1;
97 __u64 pk : 1;
98 __u64 reserved2 : 1;
99 __u64 dt : 1;
100 __u64 dfl : 1;
101 __u64 dfh : 1;
102 __u64 sp : 1;
103 __u64 pp : 1;
104 __u64 di : 1;
105 __u64 si : 1;
106 __u64 db : 1;
107 __u64 lp : 1;
108 __u64 tb : 1;
109 __u64 rt : 1;
110 __u64 reserved3 : 4;
111 __u64 cpl : 2;
112 __u64 is : 1;
113 __u64 mc : 1;
114 __u64 it : 1;
115 __u64 id : 1;
116 __u64 da : 1;
117 __u64 dd : 1;
118 __u64 ss : 1;
119 __u64 ri : 2;
120 __u64 ed : 1;
121 __u64 bn : 1;
122 __u64 reserved4 : 19;
123};
124
e235f345
XZ		 125union ia64_isr {
126 __u64 val;
127 struct {
128 __u64 code : 16;
129 __u64 vector : 8;
130 __u64 reserved1 : 8;
131 __u64 x : 1;
132 __u64 w : 1;
133 __u64 r : 1;
134 __u64 na : 1;
135 __u64 sp : 1;
136 __u64 rs : 1;
137 __u64 ir : 1;
138 __u64 ni : 1;
139 __u64 so : 1;
140 __u64 ei : 2;
141 __u64 ed : 1;
142 __u64 reserved2 : 20;
143 };
144};
145
146union ia64_lid {
147 __u64 val;
148 struct {
149 __u64 rv : 16;
150 __u64 eid : 8;
151 __u64 id : 8;
152 __u64 ig : 32;
153 };
154};
155
156union ia64_tpr {
157 __u64 val;
158 struct {
159 __u64 ig0 : 4;
160 __u64 mic : 4;
161 __u64 rsv : 8;
162 __u64 mmi : 1;
163 __u64 ig1 : 47;
164 };
165};
166
167union ia64_itir {
168 __u64 val;
169 struct {
170 __u64 rv3 : 2; /* 0-1 */
171 __u64 ps : 6; /* 2-7 */
172 __u64 key : 24; /* 8-31 */
173 __u64 rv4 : 32; /* 32-63 */
174 };
175};
176
177union ia64_rr {
178 __u64 val;
179 struct {
180 __u64 ve : 1; /* enable hw walker */
181 __u64 reserved0: 1; /* reserved */
182 __u64 ps : 6; /* log page size */
183 __u64 rid : 24; /* region id */
184 __u64 reserved1: 32; /* reserved */
185 };
186};
187
1da177e4
LT		 188/*
189 * CPU type, hardware bug flags, and per-CPU state. Frequently used
190 * state comes earlier:
191 */
192struct cpuinfo_ia64 {
e088a4ad
MW		 193 unsigned int softirq_pending;
194 unsigned long itm_delta; /* # of clock cycles between clock ticks */
195 unsigned long itm_next; /* interval timer mask value to use for next clock tick */
196 unsigned long nsec_per_cyc; /* (1000000000<<IA64_NSEC_PER_CYC_SHIFT)/itc_freq */
197 unsigned long unimpl_va_mask; /* mask of unimplemented virtual address bits (from PAL) */
198 unsigned long unimpl_pa_mask; /* mask of unimplemented physical address bits (from PAL) */
199 unsigned long itc_freq; /* frequency of ITC counter */
200 unsigned long proc_freq; /* frequency of processor */
201 unsigned long cyc_per_usec; /* itc_freq/1000000 */
202 unsigned long ptce_base;
203 unsigned int ptce_count[2];
204 unsigned int ptce_stride[2];
1da177e4
LT		 205 struct task_struct *ksoftirqd; /* kernel softirq daemon for this CPU */
206
207#ifdef CONFIG_SMP
e088a4ad 208 unsigned long loops_per_jiffy;
1da177e4 209 int cpu;
e088a4ad
MW		 210 unsigned int socket_id; /* physical processor socket id */
211 unsigned short core_id; /* core id */
212 unsigned short thread_id; /* thread id */
213 unsigned short num_log; /* Total number of logical processors on
e927ecb0 214 * this socket that were successfully booted */
e088a4ad
MW		 215 unsigned char cores_per_socket; /* Cores per processor socket */
216 unsigned char threads_per_core; /* Threads per core */
1da177e4
LT		 217#endif
218
219 /* CPUID-derived information: */
e088a4ad
MW		 220 unsigned long ppn;
221 unsigned long features;
222 unsigned char number;
223 unsigned char revision;
224 unsigned char model;
225 unsigned char family;
226 unsigned char archrev;
1da177e4 227 char vendor[16];
76d08bb3 228 char *model_name;
1da177e4
LT		 229
230#ifdef CONFIG_NUMA
231 struct ia64_node_data *node_data;
232#endif
233};
234
877105cc 235DECLARE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info);
1da177e4
LT		 236
237/*
238 * The "local" data variable. It refers to the per-CPU data of the currently executing
239 * CPU, much like "current" points to the per-task data of the currently executing task.
240 * Do not use the address of local_cpu_data, since it will be different from
241 * cpu_data(smp_processor_id())!
242 */
877105cc
TH		 243#define local_cpu_data (&__ia64_per_cpu_var(ia64_cpu_info))
244#define cpu_data(cpu) (&per_cpu(ia64_cpu_info, cpu))
1da177e4 245
1da177e4
LT		 246extern void print_cpu_info (struct cpuinfo_ia64 *);
247
248typedef struct {
249 unsigned long seg;
250} mm_segment_t;
251
252#define SET_UNALIGN_CTL(task,value) \
253({ \
254 (task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_UAC_MASK) \
255 | (((value) << IA64_THREAD_UAC_SHIFT) & IA64_THREAD_UAC_MASK)); \
256 0; \
257})
258#define GET_UNALIGN_CTL(task,addr) \
259({ \
260 put_user(((task)->thread.flags & IA64_THREAD_UAC_MASK) >> IA64_THREAD_UAC_SHIFT, \
261 (int __user *) (addr)); \
262})
263
264#define SET_FPEMU_CTL(task,value) \
265({ \
266 (task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_FPEMU_MASK) \
267 | (((value) << IA64_THREAD_FPEMU_SHIFT) & IA64_THREAD_FPEMU_MASK)); \
268 0; \
269})
270#define GET_FPEMU_CTL(task,addr) \
271({ \
272 put_user(((task)->thread.flags & IA64_THREAD_FPEMU_MASK) >> IA64_THREAD_FPEMU_SHIFT, \
273 (int __user *) (addr)); \
274})
275
1da177e4
LT		 276struct thread_struct {
277 __u32 flags; /* various thread flags (see IA64_THREAD_*) */
278 /* writing on_ustack is performance-critical, so it's worth spending 8 bits on it... */
279 __u8 on_ustack; /* executing on user-stacks? */
280 __u8 pad[3];
281 __u64 ksp; /* kernel stack pointer */
282 __u64 map_base; /* base address for get_unmapped_area() */
283 __u64 task_size; /* limit for task size */
284 __u64 rbs_bot; /* the base address for the RBS */
285 int last_fph_cpu; /* CPU that may hold the contents of f32-f127 */
286
1da177e4 287#ifdef CONFIG_PERFMON
1da177e4
LT		 288 void *pfm_context; /* pointer to detailed PMU context */
289 unsigned long pfm_needs_checking; /* when >0, pending perfmon work on kernel exit */
35589a8f 290# define INIT_THREAD_PM .pfm_context = NULL, \
1da177e4
LT		 291 .pfm_needs_checking = 0UL,
292#else
293# define INIT_THREAD_PM
294#endif
e088a4ad
MW		 295 unsigned long dbr[IA64_NUM_DBG_REGS];
296 unsigned long ibr[IA64_NUM_DBG_REGS];
1da177e4
LT		 297 struct ia64_fpreg fph[96]; /* saved/loaded on demand */
298};
299
300#define INIT_THREAD { \
301 .flags = 0, \
302 .on_ustack = 0, \
303 .ksp = 0, \
304 .map_base = DEFAULT_MAP_BASE, \
305 .rbs_bot = STACK_TOP - DEFAULT_USER_STACK_SIZE, \
306 .task_size = DEFAULT_TASK_SIZE, \
307 .last_fph_cpu = -1, \
1da177e4
LT		 308 INIT_THREAD_PM \
309 .dbr = {0, }, \
310 .ibr = {0, }, \
311 .fph = {{{{0}}}, } \
312}
313
314#define start_thread(regs,new_ip,new_sp) do { \
1da177e4
LT		 315 regs->cr_ipsr = ((regs->cr_ipsr | (IA64_PSR_BITS_TO_SET | IA64_PSR_CPL)) \
316 & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_RI | IA64_PSR_IS)); \
317 regs->cr_iip = new_ip; \
318 regs->ar_rsc = 0xf; /* eager mode, privilege level 3 */ \
319 regs->ar_rnat = 0; \
320 regs->ar_bspstore = current->thread.rbs_bot; \
321 regs->ar_fpsr = FPSR_DEFAULT; \
322 regs->loadrs = 0; \
6c5d5238 323 regs->r8 = get_dumpable(current->mm); /* set "don't zap registers" flag */ \
1da177e4 324 regs->r12 = new_sp - 16; /* allocate 16 byte scratch area */ \
6c5d5238 325 if (unlikely(!get_dumpable(current->mm))) { \
1da177e4
LT		 326 /* \
327 * Zap scratch regs to avoid leaking bits between processes with different \
328 * uid/privileges. \
329 */ \
330 regs->ar_pfs = 0; regs->b0 = 0; regs->pr = 0; \
331 regs->r1 = 0; regs->r9 = 0; regs->r11 = 0; regs->r13 = 0; regs->r15 = 0; \
332 } \
333} while (0)
334
335/* Forward declarations, a strange C thing... */
336struct mm_struct;
337struct task_struct;
338
339/*
340 * Free all resources held by a thread. This is called after the
341 * parent of DEAD_TASK has collected the exit status of the task via
342 * wait().
343 */
344#define release_thread(dead_task)
345
1da177e4
LT		 346/*
347 * This is the mechanism for creating a new kernel thread.
348 *
349 * NOTE 1: Only a kernel-only process (ie the swapper or direct
350 * descendants who haven't done an "execve()") should use this: it
351 * will work within a system call from a "real" process, but the
352 * process memory space will not be free'd until both the parent and
353 * the child have exited.
354 *
355 * NOTE 2: This MUST NOT be an inlined function. Otherwise, we get
356 * into trouble in init/main.c when the child thread returns to
357 * do_basic_setup() and the timing is such that free_initmem() has
358 * been called already.
359 */
360extern pid_t kernel_thread (int (*fn)(void *), void *arg, unsigned long flags);
361
362/* Get wait channel for task P. */
363extern unsigned long get_wchan (struct task_struct *p);
364
365/* Return instruction pointer of blocked task TSK. */
366#define KSTK_EIP(tsk) \
367 ({ \
6450578f 368 struct pt_regs *_regs = task_pt_regs(tsk); \
1da177e4
LT		 369 _regs->cr_iip + ia64_psr(_regs)->ri; \
370 })
371
372/* Return stack pointer of blocked task TSK. */
373#define KSTK_ESP(tsk) ((tsk)->thread.ksp)
374
375extern void ia64_getreg_unknown_kr (void);
376extern void ia64_setreg_unknown_kr (void);
377
378#define ia64_get_kr(regnum) \
379({ \
380 unsigned long r = 0; \
381 \
382 switch (regnum) { \
383 case 0: r = ia64_getreg(_IA64_REG_AR_KR0); break; \
384 case 1: r = ia64_getreg(_IA64_REG_AR_KR1); break; \
385 case 2: r = ia64_getreg(_IA64_REG_AR_KR2); break; \
386 case 3: r = ia64_getreg(_IA64_REG_AR_KR3); break; \
387 case 4: r = ia64_getreg(_IA64_REG_AR_KR4); break; \
388 case 5: r = ia64_getreg(_IA64_REG_AR_KR5); break; \
389 case 6: r = ia64_getreg(_IA64_REG_AR_KR6); break; \
390 case 7: r = ia64_getreg(_IA64_REG_AR_KR7); break; \
391 default: ia64_getreg_unknown_kr(); break; \
392 } \
393 r; \
394})
395
396#define ia64_set_kr(regnum, r) \
397({ \
398 switch (regnum) { \
399 case 0: ia64_setreg(_IA64_REG_AR_KR0, r); break; \
400 case 1: ia64_setreg(_IA64_REG_AR_KR1, r); break; \
401 case 2: ia64_setreg(_IA64_REG_AR_KR2, r); break; \
402 case 3: ia64_setreg(_IA64_REG_AR_KR3, r); break; \
403 case 4: ia64_setreg(_IA64_REG_AR_KR4, r); break; \
404 case 5: ia64_setreg(_IA64_REG_AR_KR5, r); break; \
405 case 6: ia64_setreg(_IA64_REG_AR_KR6, r); break; \
406 case 7: ia64_setreg(_IA64_REG_AR_KR7, r); break; \
407 default: ia64_setreg_unknown_kr(); break; \
408 } \
409})
410
411/*
412 * The following three macros can't be inline functions because we don't have struct
413 * task_struct at this point.
414 */
415
05062d96
PC		 416/*
417 * Return TRUE if task T owns the fph partition of the CPU we're running on.
418 * Must be called from code that has preemption disabled.
419 */
1da177e4
LT		 420#define ia64_is_local_fpu_owner(t) \
421({ \
422 struct task_struct *__ia64_islfo_task = (t); \
423 (__ia64_islfo_task->thread.last_fph_cpu == smp_processor_id() \
424 && __ia64_islfo_task == (struct task_struct *) ia64_get_kr(IA64_KR_FPU_OWNER)); \
425})
426
05062d96
PC		 427/*
428 * Mark task T as owning the fph partition of the CPU we're running on.
429 * Must be called from code that has preemption disabled.
430 */
1da177e4
LT		 431#define ia64_set_local_fpu_owner(t) do { \
432 struct task_struct *__ia64_slfo_task = (t); \
433 __ia64_slfo_task->thread.last_fph_cpu = smp_processor_id(); \
434 ia64_set_kr(IA64_KR_FPU_OWNER, (unsigned long) __ia64_slfo_task); \
435} while (0)
436
437/* Mark the fph partition of task T as being invalid on all CPUs. */
438#define ia64_drop_fpu(t) ((t)->thread.last_fph_cpu = -1)
439
440extern void __ia64_init_fpu (void);
441extern void __ia64_save_fpu (struct ia64_fpreg *fph);
442extern void __ia64_load_fpu (struct ia64_fpreg *fph);
443extern void ia64_save_debug_regs (unsigned long *save_area);
444extern void ia64_load_debug_regs (unsigned long *save_area);
445
1da177e4
LT		 446#define ia64_fph_enable() do { ia64_rsm(IA64_PSR_DFH); ia64_srlz_d(); } while (0)
447#define ia64_fph_disable() do { ia64_ssm(IA64_PSR_DFH); ia64_srlz_d(); } while (0)
448
449/* load fp 0.0 into fph */
450static inline void
451ia64_init_fpu (void) {
452 ia64_fph_enable();
453 __ia64_init_fpu();
454 ia64_fph_disable();
455}
456
457/* save f32-f127 at FPH */
458static inline void
459ia64_save_fpu (struct ia64_fpreg *fph) {
460 ia64_fph_enable();
461 __ia64_save_fpu(fph);
462 ia64_fph_disable();
463}
464
465/* load f32-f127 from FPH */
466static inline void
467ia64_load_fpu (struct ia64_fpreg *fph) {
468 ia64_fph_enable();
469 __ia64_load_fpu(fph);
470 ia64_fph_disable();
471}
472
473static inline __u64
474ia64_clear_ic (void)
475{
476 __u64 psr;
477 psr = ia64_getreg(_IA64_REG_PSR);
478 ia64_stop();
479 ia64_rsm(IA64_PSR_I | IA64_PSR_IC);
480 ia64_srlz_i();
481 return psr;
482}
483
484/*
485 * Restore the psr.
486 */
487static inline void
488ia64_set_psr (__u64 psr)
489{
490 ia64_stop();
491 ia64_setreg(_IA64_REG_PSR_L, psr);
f00c2d36 492 ia64_srlz_i();
1da177e4
LT		 493}
494
495/*
496 * Insert a translation into an instruction and/or data translation
497 * register.
498 */
499static inline void
500ia64_itr (__u64 target_mask, __u64 tr_num,
501 __u64 vmaddr, __u64 pte,
502 __u64 log_page_size)
503{
504 ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2));
505 ia64_setreg(_IA64_REG_CR_IFA, vmaddr);
506 ia64_stop();
507 if (target_mask & 0x1)
508 ia64_itri(tr_num, pte);
509 if (target_mask & 0x2)
510 ia64_itrd(tr_num, pte);
511}
512
513/*
514 * Insert a translation into the instruction and/or data translation
515 * cache.
516 */
517static inline void
518ia64_itc (__u64 target_mask, __u64 vmaddr, __u64 pte,
519 __u64 log_page_size)
520{
521 ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2));
522 ia64_setreg(_IA64_REG_CR_IFA, vmaddr);
523 ia64_stop();
524 /* as per EAS2.6, itc must be the last instruction in an instruction group */
525 if (target_mask & 0x1)
526 ia64_itci(pte);
527 if (target_mask & 0x2)
528 ia64_itcd(pte);
529}
530
531/*
532 * Purge a range of addresses from instruction and/or data translation
533 * register(s).
534 */
535static inline void
536ia64_ptr (__u64 target_mask, __u64 vmaddr, __u64 log_size)
537{
538 if (target_mask & 0x1)
539 ia64_ptri(vmaddr, (log_size << 2));
540 if (target_mask & 0x2)
541 ia64_ptrd(vmaddr, (log_size << 2));
542}
543
544/* Set the interrupt vector address. The address must be suitably aligned (32KB). */
545static inline void
546ia64_set_iva (void *ivt_addr)
547{
548 ia64_setreg(_IA64_REG_CR_IVA, (__u64) ivt_addr);
549 ia64_srlz_i();
550}
551
552/* Set the page table address and control bits. */
553static inline void
554ia64_set_pta (__u64 pta)
555{
556 /* Note: srlz.i implies srlz.d */
557 ia64_setreg(_IA64_REG_CR_PTA, pta);
558 ia64_srlz_i();
559}
560
561static inline void
562ia64_eoi (void)
563{
564 ia64_setreg(_IA64_REG_CR_EOI, 0);
565 ia64_srlz_d();
566}
567
568#define cpu_relax() ia64_hint(ia64_hint_pause)
569
a5878691
BH		 570static inline int
571ia64_get_irr(unsigned int vector)
572{
573 unsigned int reg = vector / 64;
574 unsigned int bit = vector % 64;
575 u64 irr;
576
577 switch (reg) {
578 case 0: irr = ia64_getreg(_IA64_REG_CR_IRR0); break;
579 case 1: irr = ia64_getreg(_IA64_REG_CR_IRR1); break;
580 case 2: irr = ia64_getreg(_IA64_REG_CR_IRR2); break;
581 case 3: irr = ia64_getreg(_IA64_REG_CR_IRR3); break;
582 }
583
584 return test_bit(bit, &irr);
585}
586
1da177e4
LT		 587static inline void
588ia64_set_lrr0 (unsigned long val)
589{
590 ia64_setreg(_IA64_REG_CR_LRR0, val);
591 ia64_srlz_d();
592}
593
594static inline void
595ia64_set_lrr1 (unsigned long val)
596{
597 ia64_setreg(_IA64_REG_CR_LRR1, val);
598 ia64_srlz_d();
599}
600
601
602/*
603 * Given the address to which a spill occurred, return the unat bit
604 * number that corresponds to this address.
605 */
606static inline __u64
607ia64_unat_pos (void *spill_addr)
608{
609 return ((__u64) spill_addr >> 3) & 0x3f;
610}
611
612/*
613 * Set the NaT bit of an integer register which was spilled at address
614 * SPILL_ADDR. UNAT is the mask to be updated.
615 */
616static inline void
617ia64_set_unat (__u64 *unat, void *spill_addr, unsigned long nat)
618{
619 __u64 bit = ia64_unat_pos(spill_addr);
620 __u64 mask = 1UL << bit;
621
622 *unat = (*unat & ~mask) | (nat << bit);
623}
624
625/*
626 * Return saved PC of a blocked thread.
627 * Note that the only way T can block is through a call to schedule() -> switch_to().
628 */
629static inline unsigned long
630thread_saved_pc (struct task_struct *t)
631{
632 struct unw_frame_info info;
633 unsigned long ip;
634
635 unw_init_from_blocked_task(&info, t);
636 if (unw_unwind(&info) < 0)
637 return 0;
638 unw_get_ip(&info, &ip);
639 return ip;
640}
641
642/*
643 * Get the current instruction/program counter value.
644 */
645#define current_text_addr() \
646 ({ void *_pc; _pc = (void *)ia64_getreg(_IA64_REG_IP); _pc; })
647
648static inline __u64
649ia64_get_ivr (void)
650{
651 __u64 r;
652 ia64_srlz_d();
653 r = ia64_getreg(_IA64_REG_CR_IVR);
654 ia64_srlz_d();
655 return r;
656}
657
658static inline void
659ia64_set_dbr (__u64 regnum, __u64 value)
660{
661 __ia64_set_dbr(regnum, value);
662#ifdef CONFIG_ITANIUM
663 ia64_srlz_d();
664#endif
665}
666
667static inline __u64
668ia64_get_dbr (__u64 regnum)
669{
670 __u64 retval;
671
672 retval = __ia64_get_dbr(regnum);
673#ifdef CONFIG_ITANIUM
674 ia64_srlz_d();
675#endif
676 return retval;
677}
678
679static inline __u64
680ia64_rotr (__u64 w, __u64 n)
681{
682 return (w >> n) | (w << (64 - n));
683}
684
685#define ia64_rotl(w,n) ia64_rotr((w), (64) - (n))
686
687/*
688 * Take a mapped kernel address and return the equivalent address
689 * in the region 7 identity mapped virtual area.
690 */
691static inline void *
692ia64_imva (void *addr)
693{
694 void *result;
695 result = (void *) ia64_tpa(addr);
696 return __va(result);
697}
698
699#define ARCH_HAS_PREFETCH
700#define ARCH_HAS_PREFETCHW
701#define ARCH_HAS_SPINLOCK_PREFETCH
702#define PREFETCH_STRIDE L1_CACHE_BYTES
703
704static inline void
705prefetch (const void *x)
706{
707 ia64_lfetch(ia64_lfhint_none, x);
708}
709
710static inline void
711prefetchw (const void *x)
712{
713 ia64_lfetch_excl(ia64_lfhint_none, x);
714}
715
716#define spin_lock_prefetch(x) prefetchw(x)
717
718extern unsigned long boot_option_idle_override;
d1896049
TR		 719
720enum idle_boot_override {IDLE_NO_OVERRIDE=0, IDLE_HALT, IDLE_FORCE_MWAIT,
721 IDLE_NOMWAIT, IDLE_POLL};
1da177e4 722
c140d879
DH		 723void cpu_idle_wait(void);
724void default_idle(void);
725
726#define ia64_platform_is(x) (strcmp(x, platform_name) == 0)
727
1da177e4
LT		 728#endif /* !__ASSEMBLY__ */
729
730#endif /* _ASM_IA64_PROCESSOR_H */
kernel source for telekom puls (alcatel/mediatek)