Linux kernel mirror (for testing)
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1#ifndef __ASM_PPC64_PROCESSOR_H
2#define __ASM_PPC64_PROCESSOR_H
3
4/*
5 * Copyright (C) 2001 PPC 64 Team, IBM Corp
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#include <linux/stringify.h>
14#ifndef __ASSEMBLY__
15#include <linux/config.h>
16#include <asm/atomic.h>
17#include <asm/ppcdebug.h>
18#include <asm/a.out.h>
19#endif
20#include <asm/ptrace.h>
21#include <asm/types.h>
22#include <asm/systemcfg.h>
23#include <asm/cputable.h>
24
25/* Machine State Register (MSR) Fields */
26#define MSR_SF_LG 63 /* Enable 64 bit mode */
27#define MSR_ISF_LG 61 /* Interrupt 64b mode valid on 630 */
28#define MSR_HV_LG 60 /* Hypervisor state */
29#define MSR_VEC_LG 25 /* Enable AltiVec */
30#define MSR_POW_LG 18 /* Enable Power Management */
31#define MSR_WE_LG 18 /* Wait State Enable */
32#define MSR_TGPR_LG 17 /* TLB Update registers in use */
33#define MSR_CE_LG 17 /* Critical Interrupt Enable */
34#define MSR_ILE_LG 16 /* Interrupt Little Endian */
35#define MSR_EE_LG 15 /* External Interrupt Enable */
36#define MSR_PR_LG 14 /* Problem State / Privilege Level */
37#define MSR_FP_LG 13 /* Floating Point enable */
38#define MSR_ME_LG 12 /* Machine Check Enable */
39#define MSR_FE0_LG 11 /* Floating Exception mode 0 */
40#define MSR_SE_LG 10 /* Single Step */
41#define MSR_BE_LG 9 /* Branch Trace */
42#define MSR_DE_LG 9 /* Debug Exception Enable */
43#define MSR_FE1_LG 8 /* Floating Exception mode 1 */
44#define MSR_IP_LG 6 /* Exception prefix 0x000/0xFFF */
45#define MSR_IR_LG 5 /* Instruction Relocate */
46#define MSR_DR_LG 4 /* Data Relocate */
47#define MSR_PE_LG 3 /* Protection Enable */
48#define MSR_PX_LG 2 /* Protection Exclusive Mode */
49#define MSR_PMM_LG 2 /* Performance monitor */
50#define MSR_RI_LG 1 /* Recoverable Exception */
51#define MSR_LE_LG 0 /* Little Endian */
52
53#ifdef __ASSEMBLY__
54#define __MASK(X) (1<<(X))
55#else
56#define __MASK(X) (1UL<<(X))
57#endif
58
59#define MSR_SF __MASK(MSR_SF_LG) /* Enable 64 bit mode */
60#define MSR_ISF __MASK(MSR_ISF_LG) /* Interrupt 64b mode valid on 630 */
61#define MSR_HV __MASK(MSR_HV_LG) /* Hypervisor state */
62#define MSR_VEC __MASK(MSR_VEC_LG) /* Enable AltiVec */
63#define MSR_POW __MASK(MSR_POW_LG) /* Enable Power Management */
64#define MSR_WE __MASK(MSR_WE_LG) /* Wait State Enable */
65#define MSR_TGPR __MASK(MSR_TGPR_LG) /* TLB Update registers in use */
66#define MSR_CE __MASK(MSR_CE_LG) /* Critical Interrupt Enable */
67#define MSR_ILE __MASK(MSR_ILE_LG) /* Interrupt Little Endian */
68#define MSR_EE __MASK(MSR_EE_LG) /* External Interrupt Enable */
69#define MSR_PR __MASK(MSR_PR_LG) /* Problem State / Privilege Level */
70#define MSR_FP __MASK(MSR_FP_LG) /* Floating Point enable */
71#define MSR_ME __MASK(MSR_ME_LG) /* Machine Check Enable */
72#define MSR_FE0 __MASK(MSR_FE0_LG) /* Floating Exception mode 0 */
73#define MSR_SE __MASK(MSR_SE_LG) /* Single Step */
74#define MSR_BE __MASK(MSR_BE_LG) /* Branch Trace */
75#define MSR_DE __MASK(MSR_DE_LG) /* Debug Exception Enable */
76#define MSR_FE1 __MASK(MSR_FE1_LG) /* Floating Exception mode 1 */
77#define MSR_IP __MASK(MSR_IP_LG) /* Exception prefix 0x000/0xFFF */
78#define MSR_IR __MASK(MSR_IR_LG) /* Instruction Relocate */
79#define MSR_DR __MASK(MSR_DR_LG) /* Data Relocate */
80#define MSR_PE __MASK(MSR_PE_LG) /* Protection Enable */
81#define MSR_PX __MASK(MSR_PX_LG) /* Protection Exclusive Mode */
82#define MSR_PMM __MASK(MSR_PMM_LG) /* Performance monitor */
83#define MSR_RI __MASK(MSR_RI_LG) /* Recoverable Exception */
84#define MSR_LE __MASK(MSR_LE_LG) /* Little Endian */
85
86#define MSR_ MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_ISF
87#define MSR_KERNEL MSR_ | MSR_SF | MSR_HV
88
89#define MSR_USER32 MSR_ | MSR_PR | MSR_EE
90#define MSR_USER64 MSR_USER32 | MSR_SF
91
92/* Floating Point Status and Control Register (FPSCR) Fields */
93
94#define FPSCR_FX 0x80000000 /* FPU exception summary */
95#define FPSCR_FEX 0x40000000 /* FPU enabled exception summary */
96#define FPSCR_VX 0x20000000 /* Invalid operation summary */
97#define FPSCR_OX 0x10000000 /* Overflow exception summary */
98#define FPSCR_UX 0x08000000 /* Underflow exception summary */
99#define FPSCR_ZX 0x04000000 /* Zero-divide exception summary */
100#define FPSCR_XX 0x02000000 /* Inexact exception summary */
101#define FPSCR_VXSNAN 0x01000000 /* Invalid op for SNaN */
102#define FPSCR_VXISI 0x00800000 /* Invalid op for Inv - Inv */
103#define FPSCR_VXIDI 0x00400000 /* Invalid op for Inv / Inv */
104#define FPSCR_VXZDZ 0x00200000 /* Invalid op for Zero / Zero */
105#define FPSCR_VXIMZ 0x00100000 /* Invalid op for Inv * Zero */
106#define FPSCR_VXVC 0x00080000 /* Invalid op for Compare */
107#define FPSCR_FR 0x00040000 /* Fraction rounded */
108#define FPSCR_FI 0x00020000 /* Fraction inexact */
109#define FPSCR_FPRF 0x0001f000 /* FPU Result Flags */
110#define FPSCR_FPCC 0x0000f000 /* FPU Condition Codes */
111#define FPSCR_VXSOFT 0x00000400 /* Invalid op for software request */
112#define FPSCR_VXSQRT 0x00000200 /* Invalid op for square root */
113#define FPSCR_VXCVI 0x00000100 /* Invalid op for integer convert */
114#define FPSCR_VE 0x00000080 /* Invalid op exception enable */
115#define FPSCR_OE 0x00000040 /* IEEE overflow exception enable */
116#define FPSCR_UE 0x00000020 /* IEEE underflow exception enable */
117#define FPSCR_ZE 0x00000010 /* IEEE zero divide exception enable */
118#define FPSCR_XE 0x00000008 /* FP inexact exception enable */
119#define FPSCR_NI 0x00000004 /* FPU non IEEE-Mode */
120#define FPSCR_RN 0x00000003 /* FPU rounding control */
121
122/* Special Purpose Registers (SPRNs)*/
123
124#define SPRN_CTR 0x009 /* Count Register */
125#define SPRN_DABR 0x3F5 /* Data Address Breakpoint Register */
126#define DABR_TRANSLATION (1UL << 2)
127#define SPRN_DAR 0x013 /* Data Address Register */
128#define SPRN_DEC 0x016 /* Decrement Register */
129#define SPRN_DSISR 0x012 /* Data Storage Interrupt Status Register */
130#define DSISR_NOHPTE 0x40000000 /* no translation found */
131#define DSISR_PROTFAULT 0x08000000 /* protection fault */
132#define DSISR_ISSTORE 0x02000000 /* access was a store */
133#define DSISR_DABRMATCH 0x00400000 /* hit data breakpoint */
134#define DSISR_NOSEGMENT 0x00200000 /* STAB/SLB miss */
135#define SPRN_HID0 0x3F0 /* Hardware Implementation Register 0 */
136#define SPRN_MSRDORM 0x3F1 /* Hardware Implementation Register 1 */
137#define SPRN_HID1 0x3F1 /* Hardware Implementation Register 1 */
138#define SPRN_IABR 0x3F2 /* Instruction Address Breakpoint Register */
139#define SPRN_NIADORM 0x3F3 /* Hardware Implementation Register 2 */
140#define SPRN_HID4 0x3F4 /* 970 HID4 */
141#define SPRN_HID5 0x3F6 /* 970 HID5 */
142#define SPRN_HID6 0x3F9 /* BE HID 6 */
143#define HID6_LB (0x0F<<12) /* Concurrent Large Page Modes */
144#define HID6_DLP (1<<20) /* Disable all large page modes (4K only) */
145#define SPRN_TSCR 0x399 /* Thread switch control on BE */
146#define SPRN_TTR 0x39A /* Thread switch timeout on BE */
147#define TSCR_DEC_ENABLE 0x200000 /* Decrementer Interrupt */
148#define TSCR_EE_ENABLE 0x100000 /* External Interrupt */
149#define TSCR_EE_BOOST 0x080000 /* External Interrupt Boost */
150#define SPRN_TSC 0x3FD /* Thread switch control on others */
151#define SPRN_TST 0x3FC /* Thread switch timeout on others */
152#define SPRN_L2CR 0x3F9 /* Level 2 Cache Control Regsiter */
153#define SPRN_LR 0x008 /* Link Register */
154#define SPRN_PIR 0x3FF /* Processor Identification Register */
155#define SPRN_PIT 0x3DB /* Programmable Interval Timer */
156#define SPRN_PURR 0x135 /* Processor Utilization of Resources Register */
157#define SPRN_PVR 0x11F /* Processor Version Register */
158#define SPRN_RPA 0x3D6 /* Required Physical Address Register */
159#define SPRN_SDA 0x3BF /* Sampled Data Address Register */
160#define SPRN_SDR1 0x019 /* MMU Hash Base Register */
161#define SPRN_SIA 0x3BB /* Sampled Instruction Address Register */
162#define SPRN_SPRG0 0x110 /* Special Purpose Register General 0 */
163#define SPRN_SPRG1 0x111 /* Special Purpose Register General 1 */
164#define SPRN_SPRG2 0x112 /* Special Purpose Register General 2 */
165#define SPRN_SPRG3 0x113 /* Special Purpose Register General 3 */
166#define SPRN_SRR0 0x01A /* Save/Restore Register 0 */
167#define SPRN_SRR1 0x01B /* Save/Restore Register 1 */
168#define SPRN_TBRL 0x10C /* Time Base Read Lower Register (user, R/O) */
169#define SPRN_TBRU 0x10D /* Time Base Read Upper Register (user, R/O) */
170#define SPRN_TBWL 0x11C /* Time Base Lower Register (super, W/O) */
171#define SPRN_TBWU 0x11D /* Time Base Write Upper Register (super, W/O) */
172#define SPRN_HIOR 0x137 /* 970 Hypervisor interrupt offset */
173#define SPRN_USIA 0x3AB /* User Sampled Instruction Address Register */
174#define SPRN_XER 0x001 /* Fixed Point Exception Register */
175#define SPRN_VRSAVE 0x100 /* Vector save */
176#define SPRN_CTRLF 0x088
177#define SPRN_CTRLT 0x098
178#define CTRL_RUNLATCH 0x1
179
180/* Performance monitor SPRs */
181#define SPRN_SIAR 780
182#define SPRN_SDAR 781
183#define SPRN_MMCRA 786
184#define MMCRA_SIHV 0x10000000UL /* state of MSR HV when SIAR set */
185#define MMCRA_SIPR 0x08000000UL /* state of MSR PR when SIAR set */
186#define MMCRA_SAMPLE_ENABLE 0x00000001UL /* enable sampling */
187#define SPRN_PMC1 787
188#define SPRN_PMC2 788
189#define SPRN_PMC3 789
190#define SPRN_PMC4 790
191#define SPRN_PMC5 791
192#define SPRN_PMC6 792
193#define SPRN_PMC7 793
194#define SPRN_PMC8 794
195#define SPRN_MMCR0 795
196#define MMCR0_FC 0x80000000UL /* freeze counters. set to 1 on a perfmon exception */
197#define MMCR0_FCS 0x40000000UL /* freeze in supervisor state */
198#define MMCR0_KERNEL_DISABLE MMCR0_FCS
199#define MMCR0_FCP 0x20000000UL /* freeze in problem state */
200#define MMCR0_PROBLEM_DISABLE MMCR0_FCP
201#define MMCR0_FCM1 0x10000000UL /* freeze counters while MSR mark = 1 */
202#define MMCR0_FCM0 0x08000000UL /* freeze counters while MSR mark = 0 */
203#define MMCR0_PMXE 0x04000000UL /* performance monitor exception enable */
204#define MMCR0_FCECE 0x02000000UL /* freeze counters on enabled condition or event */
205/* time base exception enable */
206#define MMCR0_TBEE 0x00400000UL /* time base exception enable */
207#define MMCR0_PMC1CE 0x00008000UL /* PMC1 count enable*/
208#define MMCR0_PMCjCE 0x00004000UL /* PMCj count enable*/
209#define MMCR0_TRIGGER 0x00002000UL /* TRIGGER enable */
210#define MMCR0_PMAO 0x00000080UL /* performance monitor alert has occurred, set to 0 after handling exception */
211#define MMCR0_SHRFC 0x00000040UL /* SHRre freeze conditions between threads */
212#define MMCR0_FCTI 0x00000008UL /* freeze counters in tags inactive mode */
213#define MMCR0_FCTA 0x00000004UL /* freeze counters in tags active mode */
214#define MMCR0_FCWAIT 0x00000002UL /* freeze counter in WAIT state */
215#define MMCR0_FCHV 0x00000001UL /* freeze conditions in hypervisor mode */
216#define SPRN_MMCR1 798
217
218/* Short-hand versions for a number of the above SPRNs */
219
220#define CTR SPRN_CTR /* Counter Register */
221#define DAR SPRN_DAR /* Data Address Register */
222#define DABR SPRN_DABR /* Data Address Breakpoint Register */
223#define DEC SPRN_DEC /* Decrement Register */
224#define DSISR SPRN_DSISR /* Data Storage Interrupt Status Register */
225#define HID0 SPRN_HID0 /* Hardware Implementation Register 0 */
226#define MSRDORM SPRN_MSRDORM /* MSR Dormant Register */
227#define NIADORM SPRN_NIADORM /* NIA Dormant Register */
228#define TSC SPRN_TSC /* Thread switch control */
229#define TST SPRN_TST /* Thread switch timeout */
230#define IABR SPRN_IABR /* Instruction Address Breakpoint Register */
231#define L2CR SPRN_L2CR /* PPC 750 L2 control register */
232#define __LR SPRN_LR
233#define PVR SPRN_PVR /* Processor Version */
234#define PIR SPRN_PIR /* Processor ID */
235#define PURR SPRN_PURR /* Processor Utilization of Resource Register */
236#define SDR1 SPRN_SDR1 /* MMU hash base register */
237#define SPR0 SPRN_SPRG0 /* Supervisor Private Registers */
238#define SPR1 SPRN_SPRG1
239#define SPR2 SPRN_SPRG2
240#define SPR3 SPRN_SPRG3
241#define SPRG0 SPRN_SPRG0
242#define SPRG1 SPRN_SPRG1
243#define SPRG2 SPRN_SPRG2
244#define SPRG3 SPRN_SPRG3
245#define SRR0 SPRN_SRR0 /* Save and Restore Register 0 */
246#define SRR1 SPRN_SRR1 /* Save and Restore Register 1 */
247#define TBRL SPRN_TBRL /* Time Base Read Lower Register */
248#define TBRU SPRN_TBRU /* Time Base Read Upper Register */
249#define TBWL SPRN_TBWL /* Time Base Write Lower Register */
250#define TBWU SPRN_TBWU /* Time Base Write Upper Register */
251#define XER SPRN_XER
252
253/* Processor Version Register (PVR) field extraction */
254
255#define PVR_VER(pvr) (((pvr) >> 16) & 0xFFFF) /* Version field */
256#define PVR_REV(pvr) (((pvr) >> 0) & 0xFFFF) /* Revison field */
257
258/* Processor Version Numbers */
259#define PV_NORTHSTAR 0x0033
260#define PV_PULSAR 0x0034
261#define PV_POWER4 0x0035
262#define PV_ICESTAR 0x0036
263#define PV_SSTAR 0x0037
264#define PV_POWER4p 0x0038
265#define PV_970 0x0039
266#define PV_POWER5 0x003A
267#define PV_POWER5p 0x003B
268#define PV_970FX 0x003C
269#define PV_630 0x0040
270#define PV_630p 0x0041
271#define PV_970MP 0x0044
272#define PV_BE 0x0070
273
274/* Platforms supported by PPC64 */
275#define PLATFORM_PSERIES 0x0100
276#define PLATFORM_PSERIES_LPAR 0x0101
277#define PLATFORM_ISERIES_LPAR 0x0201
278#define PLATFORM_LPAR 0x0001
279#define PLATFORM_POWERMAC 0x0400
280#define PLATFORM_MAPLE 0x0500
281#define PLATFORM_BPA 0x1000
282
283/* Compatibility with drivers coming from PPC32 world */
284#define _machine (systemcfg->platform)
285#define _MACH_Pmac PLATFORM_POWERMAC
286
287/*
288 * List of interrupt controllers.
289 */
290#define IC_INVALID 0
291#define IC_OPEN_PIC 1
292#define IC_PPC_XIC 2
293#define IC_BPA_IIC 3
294
295#define XGLUE(a,b) a##b
296#define GLUE(a,b) XGLUE(a,b)
297
298#ifdef __ASSEMBLY__
299
300#define _GLOBAL(name) \
301 .section ".text"; \
302 .align 2 ; \
303 .globl name; \
304 .globl GLUE(.,name); \
305 .section ".opd","aw"; \
306name: \
307 .quad GLUE(.,name); \
308 .quad .TOC.@tocbase; \
309 .quad 0; \
310 .previous; \
311 .type GLUE(.,name),@function; \
312GLUE(.,name):
313
314#define _KPROBE(name) \
315 .section ".kprobes.text","a"; \
316 .align 2 ; \
317 .globl name; \
318 .globl GLUE(.,name); \
319 .section ".opd","aw"; \
320name: \
321 .quad GLUE(.,name); \
322 .quad .TOC.@tocbase; \
323 .quad 0; \
324 .previous; \
325 .type GLUE(.,name),@function; \
326GLUE(.,name):
327
328#define _STATIC(name) \
329 .section ".text"; \
330 .align 2 ; \
331 .section ".opd","aw"; \
332name: \
333 .quad GLUE(.,name); \
334 .quad .TOC.@tocbase; \
335 .quad 0; \
336 .previous; \
337 .type GLUE(.,name),@function; \
338GLUE(.,name):
339
340#else /* __ASSEMBLY__ */
341
342/*
343 * Default implementation of macro that returns current
344 * instruction pointer ("program counter").
345 */
346#define current_text_addr() ({ __label__ _l; _l: &&_l;})
347
348/* Macros for setting and retrieving special purpose registers */
349
350#define mfmsr() ({unsigned long rval; \
351 asm volatile("mfmsr %0" : "=r" (rval)); rval;})
352
353#define __mtmsrd(v, l) asm volatile("mtmsrd %0," __stringify(l) \
354 : : "r" (v))
355#define mtmsrd(v) __mtmsrd((v), 0)
356
357#define mfspr(rn) ({unsigned long rval; \
358 asm volatile("mfspr %0," __stringify(rn) \
359 : "=r" (rval)); rval;})
360#define mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
361
362#define mftb() ({unsigned long rval; \
363 asm volatile("mftb %0" : "=r" (rval)); rval;})
364
365#define mttbl(v) asm volatile("mttbl %0":: "r"(v))
366#define mttbu(v) asm volatile("mttbu %0":: "r"(v))
367
368#define mfasr() ({unsigned long rval; \
369 asm volatile("mfasr %0" : "=r" (rval)); rval;})
370
371static inline void set_tb(unsigned int upper, unsigned int lower)
372{
373 mttbl(0);
374 mttbu(upper);
375 mttbl(lower);
376}
377
378#define __get_SP() ({unsigned long sp; \
379 asm volatile("mr %0,1": "=r" (sp)); sp;})
380
381#ifdef __KERNEL__
382
383extern int have_of;
384extern u64 ppc64_interrupt_controller;
385
386struct task_struct;
387void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
388void release_thread(struct task_struct *);
389
390/* Prepare to copy thread state - unlazy all lazy status */
391extern void prepare_to_copy(struct task_struct *tsk);
392
393/* Create a new kernel thread. */
394extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
395
396/* Lazy FPU handling on uni-processor */
397extern struct task_struct *last_task_used_math;
398extern struct task_struct *last_task_used_altivec;
399
400/* 64-bit user address space is 44-bits (16TB user VM) */
401#define TASK_SIZE_USER64 (0x0000100000000000UL)
402
403/*
404 * 32-bit user address space is 4GB - 1 page
405 * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
406 */
407#define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE))
408
409#define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \
410 TASK_SIZE_USER32 : TASK_SIZE_USER64)
411
412/* This decides where the kernel will search for a free chunk of vm
413 * space during mmap's.
414 */
415#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
416#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(TASK_SIZE_USER64 / 4))
417
418#define TASK_UNMAPPED_BASE ((test_thread_flag(TIF_32BIT)||(ppcdebugset(PPCDBG_BINFMT_32ADDR))) ? \
419 TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )
420
421typedef struct {
422 unsigned long seg;
423} mm_segment_t;
424
425struct thread_struct {
426 unsigned long ksp; /* Kernel stack pointer */
427 unsigned long ksp_vsid;
428 struct pt_regs *regs; /* Pointer to saved register state */
429 mm_segment_t fs; /* for get_fs() validation */
430 double fpr[32]; /* Complete floating point set */
431 unsigned long fpscr; /* Floating point status (plus pad) */
432 unsigned long fpexc_mode; /* Floating-point exception mode */
433 unsigned long start_tb; /* Start purr when proc switched in */
434 unsigned long accum_tb; /* Total accumilated purr for process */
435 unsigned long vdso_base; /* base of the vDSO library */
436 unsigned long dabr; /* Data address breakpoint register */
437#ifdef CONFIG_ALTIVEC
438 /* Complete AltiVec register set */
439 vector128 vr[32] __attribute((aligned(16)));
440 /* AltiVec status */
441 vector128 vscr __attribute((aligned(16)));
442 unsigned long vrsave;
443 int used_vr; /* set if process has used altivec */
444#endif /* CONFIG_ALTIVEC */
445};
446
447#define ARCH_MIN_TASKALIGN 16
448
449#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
450
451#define INIT_THREAD { \
452 .ksp = INIT_SP, \
453 .regs = (struct pt_regs *)INIT_SP - 1, \
454 .fs = KERNEL_DS, \
455 .fpr = {0}, \
456 .fpscr = 0, \
457 .fpexc_mode = MSR_FE0|MSR_FE1, \
458}
459
460/*
461 * Return saved PC of a blocked thread. For now, this is the "user" PC
462 */
463#define thread_saved_pc(tsk) \
464 ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
465
466unsigned long get_wchan(struct task_struct *p);
467
468#define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
469#define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)
470
471/* Get/set floating-point exception mode */
472#define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))
473#define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val))
474
475extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);
476extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val);
477
478static inline unsigned int __unpack_fe01(unsigned long msr_bits)
479{
480 return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);
481}
482
483static inline unsigned long __pack_fe01(unsigned int fpmode)
484{
485 return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);
486}
487
488#define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0)
489
490/*
491 * Prefetch macros.
492 */
493#define ARCH_HAS_PREFETCH
494#define ARCH_HAS_PREFETCHW
495#define ARCH_HAS_SPINLOCK_PREFETCH
496
497static inline void prefetch(const void *x)
498{
499 if (unlikely(!x))
500 return;
501
502 __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
503}
504
505static inline void prefetchw(const void *x)
506{
507 if (unlikely(!x))
508 return;
509
510 __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
511}
512
513#define spin_lock_prefetch(x) prefetchw(x)
514
515#define HAVE_ARCH_PICK_MMAP_LAYOUT
516
517static inline void ppc64_runlatch_on(void)
518{
519 unsigned long ctrl;
520
521 if (cpu_has_feature(CPU_FTR_CTRL)) {
522 ctrl = mfspr(SPRN_CTRLF);
523 ctrl |= CTRL_RUNLATCH;
524 mtspr(SPRN_CTRLT, ctrl);
525 }
526}
527
528static inline void ppc64_runlatch_off(void)
529{
530 unsigned long ctrl;
531
532 if (cpu_has_feature(CPU_FTR_CTRL)) {
533 ctrl = mfspr(SPRN_CTRLF);
534 ctrl &= ~CTRL_RUNLATCH;
535 mtspr(SPRN_CTRLT, ctrl);
536 }
537}
538
539#endif /* __KERNEL__ */
540
541#endif /* __ASSEMBLY__ */
542
543#ifdef __KERNEL__
544#define RUNLATCH_ON(REG) \
545BEGIN_FTR_SECTION \
546 mfspr (REG),SPRN_CTRLF; \
547 ori (REG),(REG),CTRL_RUNLATCH; \
548 mtspr SPRN_CTRLT,(REG); \
549END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
550#endif
551
552/*
553 * Number of entries in the SLB. If this ever changes we should handle
554 * it with a use a cpu feature fixup.
555 */
556#define SLB_NUM_ENTRIES 64
557
558#endif /* __ASM_PPC64_PROCESSOR_H */