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9f04b9e3 PM |
1 | #ifndef _ASM_POWERPC_PROCESSOR_H |
2 | #define _ASM_POWERPC_PROCESSOR_H | |
1da177e4 LT |
3 | |
4 | /* | |
9f04b9e3 PM |
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. | |
1da177e4 | 11 | */ |
1da177e4 | 12 | |
9f04b9e3 | 13 | #include <asm/reg.h> |
1da177e4 | 14 | |
c6e6771b MN |
15 | #ifdef CONFIG_VSX |
16 | #define TS_FPRWIDTH 2 | |
17 | #else | |
9c75a31c | 18 | #define TS_FPRWIDTH 1 |
c6e6771b | 19 | #endif |
9c75a31c | 20 | |
92779245 HM |
21 | #ifdef CONFIG_PPC64 |
22 | /* Default SMT priority is set to 3. Use 11- 13bits to save priority. */ | |
23 | #define PPR_PRIORITY 3 | |
24 | #ifdef __ASSEMBLY__ | |
25 | #define INIT_PPR (PPR_PRIORITY << 50) | |
26 | #else | |
27 | #define INIT_PPR ((u64)PPR_PRIORITY << 50) | |
28 | #endif /* __ASSEMBLY__ */ | |
29 | #endif /* CONFIG_PPC64 */ | |
30 | ||
9f04b9e3 PM |
31 | #ifndef __ASSEMBLY__ |
32 | #include <linux/compiler.h> | |
1325a684 | 33 | #include <linux/cache.h> |
1da177e4 LT |
34 | #include <asm/ptrace.h> |
35 | #include <asm/types.h> | |
9422de3e | 36 | #include <asm/hw_breakpoint.h> |
1da177e4 | 37 | |
799d6046 PM |
38 | /* We do _not_ want to define new machine types at all, those must die |
39 | * in favor of using the device-tree | |
40 | * -- BenH. | |
1da177e4 | 41 | */ |
1da177e4 | 42 | |
933ee711 | 43 | /* PREP sub-platform types. Unused */ |
1da177e4 LT |
44 | #define _PREP_Motorola 0x01 /* motorola prep */ |
45 | #define _PREP_Firm 0x02 /* firmworks prep */ | |
46 | #define _PREP_IBM 0x00 /* ibm prep */ | |
47 | #define _PREP_Bull 0x03 /* bull prep */ | |
48 | ||
799d6046 | 49 | /* CHRP sub-platform types. These are arbitrary */ |
1da177e4 LT |
50 | #define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */ |
51 | #define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */ | |
52 | #define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */ | |
26c5032e | 53 | #define _CHRP_briq 0x07 /* TotalImpact's briQ */ |
1da177e4 | 54 | |
e8222502 BH |
55 | #if defined(__KERNEL__) && defined(CONFIG_PPC32) |
56 | ||
57 | extern int _chrp_type; | |
799d6046 | 58 | |
e8222502 BH |
59 | #endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */ |
60 | ||
9f04b9e3 PM |
61 | /* |
62 | * Default implementation of macro that returns current | |
63 | * instruction pointer ("program counter"). | |
64 | */ | |
65 | #define current_text_addr() ({ __label__ _l; _l: &&_l;}) | |
66 | ||
67 | /* Macros for adjusting thread priority (hardware multi-threading) */ | |
68 | #define HMT_very_low() asm volatile("or 31,31,31 # very low priority") | |
69 | #define HMT_low() asm volatile("or 1,1,1 # low priority") | |
70 | #define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority") | |
71 | #define HMT_medium() asm volatile("or 2,2,2 # medium priority") | |
72 | #define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority") | |
73 | #define HMT_high() asm volatile("or 3,3,3 # high priority") | |
74 | ||
75 | #ifdef __KERNEL__ | |
76 | ||
1da177e4 | 77 | struct task_struct; |
9f04b9e3 | 78 | void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp); |
1da177e4 LT |
79 | void release_thread(struct task_struct *); |
80 | ||
1da177e4 LT |
81 | /* Lazy FPU handling on uni-processor */ |
82 | extern struct task_struct *last_task_used_math; | |
83 | extern struct task_struct *last_task_used_altivec; | |
c6e6771b | 84 | extern struct task_struct *last_task_used_vsx; |
1da177e4 LT |
85 | extern struct task_struct *last_task_used_spe; |
86 | ||
9f04b9e3 | 87 | #ifdef CONFIG_PPC32 |
7c4f10b9 RT |
88 | |
89 | #if CONFIG_TASK_SIZE > CONFIG_KERNEL_START | |
90 | #error User TASK_SIZE overlaps with KERNEL_START address | |
91 | #endif | |
9f04b9e3 PM |
92 | #define TASK_SIZE (CONFIG_TASK_SIZE) |
93 | ||
1da177e4 LT |
94 | /* This decides where the kernel will search for a free chunk of vm |
95 | * space during mmap's. | |
96 | */ | |
97 | #define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3) | |
9f04b9e3 PM |
98 | #endif |
99 | ||
100 | #ifdef CONFIG_PPC64 | |
048ee099 AK |
101 | /* 64-bit user address space is 46-bits (64TB user VM) */ |
102 | #define TASK_SIZE_USER64 (0x0000400000000000UL) | |
9f04b9e3 PM |
103 | |
104 | /* | |
105 | * 32-bit user address space is 4GB - 1 page | |
106 | * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT | |
107 | */ | |
108 | #define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE)) | |
109 | ||
82455257 | 110 | #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \ |
9f04b9e3 | 111 | TASK_SIZE_USER32 : TASK_SIZE_USER64) |
82455257 | 112 | #define TASK_SIZE TASK_SIZE_OF(current) |
9f04b9e3 PM |
113 | |
114 | /* This decides where the kernel will search for a free chunk of vm | |
115 | * space during mmap's. | |
116 | */ | |
117 | #define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4)) | |
118 | #define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(TASK_SIZE_USER64 / 4)) | |
119 | ||
cab175f9 | 120 | #define TASK_UNMAPPED_BASE ((is_32bit_task()) ? \ |
9f04b9e3 PM |
121 | TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 ) |
122 | #endif | |
1da177e4 | 123 | |
922a70d3 DH |
124 | #ifdef __powerpc64__ |
125 | ||
126 | #define STACK_TOP_USER64 TASK_SIZE_USER64 | |
127 | #define STACK_TOP_USER32 TASK_SIZE_USER32 | |
128 | ||
cab175f9 | 129 | #define STACK_TOP (is_32bit_task() ? \ |
922a70d3 DH |
130 | STACK_TOP_USER32 : STACK_TOP_USER64) |
131 | ||
132 | #define STACK_TOP_MAX STACK_TOP_USER64 | |
133 | ||
134 | #else /* __powerpc64__ */ | |
135 | ||
136 | #define STACK_TOP TASK_SIZE | |
137 | #define STACK_TOP_MAX STACK_TOP | |
138 | ||
139 | #endif /* __powerpc64__ */ | |
922a70d3 | 140 | |
1da177e4 LT |
141 | typedef struct { |
142 | unsigned long seg; | |
143 | } mm_segment_t; | |
144 | ||
c6e6771b MN |
145 | #define TS_FPROFFSET 0 |
146 | #define TS_VSRLOWOFFSET 1 | |
147 | #define TS_FPR(i) fpr[i][TS_FPROFFSET] | |
8b3c34cf | 148 | #define TS_TRANS_FPR(i) transact_fpr[i][TS_FPROFFSET] |
9c75a31c | 149 | |
1da177e4 LT |
150 | struct thread_struct { |
151 | unsigned long ksp; /* Kernel stack pointer */ | |
85218827 KG |
152 | unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */ |
153 | ||
9f04b9e3 PM |
154 | #ifdef CONFIG_PPC64 |
155 | unsigned long ksp_vsid; | |
156 | #endif | |
1da177e4 LT |
157 | struct pt_regs *regs; /* Pointer to saved register state */ |
158 | mm_segment_t fs; /* for get_fs() validation */ | |
1325a684 AK |
159 | #ifdef CONFIG_BOOKE |
160 | /* BookE base exception scratch space; align on cacheline */ | |
161 | unsigned long normsave[8] ____cacheline_aligned; | |
162 | #endif | |
9f04b9e3 | 163 | #ifdef CONFIG_PPC32 |
1da177e4 | 164 | void *pgdir; /* root of page-table tree */ |
9f04b9e3 | 165 | #endif |
99396ac1 DK |
166 | #ifdef CONFIG_PPC_ADV_DEBUG_REGS |
167 | /* | |
168 | * The following help to manage the use of Debug Control Registers | |
169 | * om the BookE platforms. | |
170 | */ | |
171 | unsigned long dbcr0; | |
1da177e4 | 172 | unsigned long dbcr1; |
99396ac1 DK |
173 | #ifdef CONFIG_BOOKE |
174 | unsigned long dbcr2; | |
175 | #endif | |
176 | /* | |
177 | * The stored value of the DBSR register will be the value at the | |
178 | * last debug interrupt. This register can only be read from the | |
179 | * user (will never be written to) and has value while helping to | |
180 | * describe the reason for the last debug trap. Torez | |
181 | */ | |
182 | unsigned long dbsr; | |
183 | /* | |
184 | * The following will contain addresses used by debug applications | |
185 | * to help trace and trap on particular address locations. | |
186 | * The bits in the Debug Control Registers above help define which | |
187 | * of the following registers will contain valid data and/or addresses. | |
188 | */ | |
189 | unsigned long iac1; | |
190 | unsigned long iac2; | |
191 | #if CONFIG_PPC_ADV_DEBUG_IACS > 2 | |
192 | unsigned long iac3; | |
193 | unsigned long iac4; | |
194 | #endif | |
195 | unsigned long dac1; | |
196 | unsigned long dac2; | |
197 | #if CONFIG_PPC_ADV_DEBUG_DVCS > 0 | |
198 | unsigned long dvc1; | |
199 | unsigned long dvc2; | |
200 | #endif | |
1da177e4 | 201 | #endif |
c6e6771b MN |
202 | /* FP and VSX 0-31 register set */ |
203 | double fpr[32][TS_FPRWIDTH]; | |
204 | struct { | |
25c8a78b DG |
205 | |
206 | unsigned int pad; | |
207 | unsigned int val; /* Floating point status */ | |
208 | } fpscr; | |
9f04b9e3 | 209 | int fpexc_mode; /* floating-point exception mode */ |
e9370ae1 | 210 | unsigned int align_ctl; /* alignment handling control */ |
9f04b9e3 PM |
211 | #ifdef CONFIG_PPC64 |
212 | unsigned long start_tb; /* Start purr when proc switched in */ | |
213 | unsigned long accum_tb; /* Total accumilated purr for process */ | |
5aae8a53 P |
214 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
215 | struct perf_event *ptrace_bps[HBP_NUM]; | |
216 | /* | |
217 | * Helps identify source of single-step exception and subsequent | |
218 | * hw-breakpoint enablement | |
219 | */ | |
220 | struct perf_event *last_hit_ubp; | |
221 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ | |
9f04b9e3 | 222 | #endif |
9422de3e | 223 | struct arch_hw_breakpoint hw_brk; /* info on the hardware breakpoint */ |
41ab5266 | 224 | unsigned long trap_nr; /* last trap # on this thread */ |
1da177e4 LT |
225 | #ifdef CONFIG_ALTIVEC |
226 | /* Complete AltiVec register set */ | |
fc624eae | 227 | vector128 vr[32] __attribute__((aligned(16))); |
1da177e4 | 228 | /* AltiVec status */ |
fc624eae | 229 | vector128 vscr __attribute__((aligned(16))); |
1da177e4 LT |
230 | unsigned long vrsave; |
231 | int used_vr; /* set if process has used altivec */ | |
232 | #endif /* CONFIG_ALTIVEC */ | |
c6e6771b MN |
233 | #ifdef CONFIG_VSX |
234 | /* VSR status */ | |
235 | int used_vsr; /* set if process has used altivec */ | |
236 | #endif /* CONFIG_VSX */ | |
1da177e4 LT |
237 | #ifdef CONFIG_SPE |
238 | unsigned long evr[32]; /* upper 32-bits of SPE regs */ | |
239 | u64 acc; /* Accumulator */ | |
240 | unsigned long spefscr; /* SPE & eFP status */ | |
241 | int used_spe; /* set if process has used spe */ | |
242 | #endif /* CONFIG_SPE */ | |
f4c3aff2 MN |
243 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
244 | u64 tm_tfhar; /* Transaction fail handler addr */ | |
245 | u64 tm_texasr; /* Transaction exception & summary */ | |
246 | u64 tm_tfiar; /* Transaction fail instr address reg */ | |
247 | unsigned long tm_orig_msr; /* Thread's MSR on ctx switch */ | |
248 | struct pt_regs ckpt_regs; /* Checkpointed registers */ | |
249 | ||
250 | /* | |
251 | * Transactional FP and VSX 0-31 register set. | |
252 | * NOTE: the sense of these is the opposite of the integer ckpt_regs! | |
253 | * | |
254 | * When a transaction is active/signalled/scheduled etc., *regs is the | |
255 | * most recent set of/speculated GPRs with ckpt_regs being the older | |
256 | * checkpointed regs to which we roll back if transaction aborts. | |
257 | * | |
258 | * However, fpr[] is the checkpointed 'base state' of FP regs, and | |
259 | * transact_fpr[] is the new set of transactional values. | |
260 | * VRs work the same way. | |
261 | */ | |
262 | double transact_fpr[32][TS_FPRWIDTH]; | |
263 | struct { | |
264 | unsigned int pad; | |
265 | unsigned int val; /* Floating point status */ | |
266 | } transact_fpscr; | |
267 | vector128 transact_vr[32] __attribute__((aligned(16))); | |
268 | vector128 transact_vscr __attribute__((aligned(16))); | |
269 | unsigned long transact_vrsave; | |
270 | #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ | |
97e49255 AG |
271 | #ifdef CONFIG_KVM_BOOK3S_32_HANDLER |
272 | void* kvm_shadow_vcpu; /* KVM internal data */ | |
273 | #endif /* CONFIG_KVM_BOOK3S_32_HANDLER */ | |
d30f6e48 SW |
274 | #if defined(CONFIG_KVM) && defined(CONFIG_BOOKE) |
275 | struct kvm_vcpu *kvm_vcpu; | |
276 | #endif | |
efcac658 AK |
277 | #ifdef CONFIG_PPC64 |
278 | unsigned long dscr; | |
279 | int dscr_inherit; | |
92779245 | 280 | unsigned long ppr; /* used to save/restore SMT priority */ |
efcac658 | 281 | #endif |
2468dcf6 IM |
282 | #ifdef CONFIG_PPC_BOOK3S_64 |
283 | unsigned long tar; | |
284 | #endif | |
1da177e4 LT |
285 | }; |
286 | ||
287 | #define ARCH_MIN_TASKALIGN 16 | |
288 | ||
289 | #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack) | |
85218827 KG |
290 | #define INIT_SP_LIMIT \ |
291 | (_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack) | |
1da177e4 | 292 | |
6a800f36 LY |
293 | #ifdef CONFIG_SPE |
294 | #define SPEFSCR_INIT .spefscr = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE, | |
295 | #else | |
296 | #define SPEFSCR_INIT | |
297 | #endif | |
9f04b9e3 PM |
298 | |
299 | #ifdef CONFIG_PPC32 | |
1da177e4 LT |
300 | #define INIT_THREAD { \ |
301 | .ksp = INIT_SP, \ | |
85218827 | 302 | .ksp_limit = INIT_SP_LIMIT, \ |
1da177e4 LT |
303 | .fs = KERNEL_DS, \ |
304 | .pgdir = swapper_pg_dir, \ | |
305 | .fpexc_mode = MSR_FE0 | MSR_FE1, \ | |
6a800f36 | 306 | SPEFSCR_INIT \ |
1da177e4 | 307 | } |
9f04b9e3 PM |
308 | #else |
309 | #define INIT_THREAD { \ | |
310 | .ksp = INIT_SP, \ | |
85218827 | 311 | .ksp_limit = INIT_SP_LIMIT, \ |
9f04b9e3 PM |
312 | .regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \ |
313 | .fs = KERNEL_DS, \ | |
e17a2565 | 314 | .fpr = {{0}}, \ |
25c8a78b | 315 | .fpscr = { .val = 0, }, \ |
ddf5f75a | 316 | .fpexc_mode = 0, \ |
92779245 | 317 | .ppr = INIT_PPR, \ |
9f04b9e3 PM |
318 | } |
319 | #endif | |
1da177e4 LT |
320 | |
321 | /* | |
322 | * Return saved PC of a blocked thread. For now, this is the "user" PC | |
323 | */ | |
9f04b9e3 PM |
324 | #define thread_saved_pc(tsk) \ |
325 | ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0) | |
1da177e4 | 326 | |
e5093ff0 SD |
327 | #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.regs) |
328 | ||
1da177e4 LT |
329 | unsigned long get_wchan(struct task_struct *p); |
330 | ||
9f04b9e3 PM |
331 | #define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0) |
332 | #define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0) | |
1da177e4 LT |
333 | |
334 | /* Get/set floating-point exception mode */ | |
9f04b9e3 PM |
335 | #define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr)) |
336 | #define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val)) | |
1da177e4 LT |
337 | |
338 | extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr); | |
339 | extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val); | |
340 | ||
fab5db97 PM |
341 | #define GET_ENDIAN(tsk, adr) get_endian((tsk), (adr)) |
342 | #define SET_ENDIAN(tsk, val) set_endian((tsk), (val)) | |
343 | ||
344 | extern int get_endian(struct task_struct *tsk, unsigned long adr); | |
345 | extern int set_endian(struct task_struct *tsk, unsigned int val); | |
346 | ||
e9370ae1 PM |
347 | #define GET_UNALIGN_CTL(tsk, adr) get_unalign_ctl((tsk), (adr)) |
348 | #define SET_UNALIGN_CTL(tsk, val) set_unalign_ctl((tsk), (val)) | |
349 | ||
350 | extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr); | |
351 | extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val); | |
352 | ||
9f04b9e3 | 353 | static inline unsigned int __unpack_fe01(unsigned long msr_bits) |
1da177e4 LT |
354 | { |
355 | return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8); | |
356 | } | |
357 | ||
9f04b9e3 | 358 | static inline unsigned long __pack_fe01(unsigned int fpmode) |
1da177e4 LT |
359 | { |
360 | return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1); | |
361 | } | |
362 | ||
9f04b9e3 PM |
363 | #ifdef CONFIG_PPC64 |
364 | #define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0) | |
365 | #else | |
1da177e4 | 366 | #define cpu_relax() barrier() |
9f04b9e3 | 367 | #endif |
1da177e4 | 368 | |
2f25194d AB |
369 | /* Check that a certain kernel stack pointer is valid in task_struct p */ |
370 | int validate_sp(unsigned long sp, struct task_struct *p, | |
371 | unsigned long nbytes); | |
372 | ||
1da177e4 LT |
373 | /* |
374 | * Prefetch macros. | |
375 | */ | |
376 | #define ARCH_HAS_PREFETCH | |
377 | #define ARCH_HAS_PREFETCHW | |
378 | #define ARCH_HAS_SPINLOCK_PREFETCH | |
379 | ||
9f04b9e3 | 380 | static inline void prefetch(const void *x) |
1da177e4 | 381 | { |
9f04b9e3 PM |
382 | if (unlikely(!x)) |
383 | return; | |
384 | ||
385 | __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x)); | |
1da177e4 LT |
386 | } |
387 | ||
9f04b9e3 | 388 | static inline void prefetchw(const void *x) |
1da177e4 | 389 | { |
9f04b9e3 PM |
390 | if (unlikely(!x)) |
391 | return; | |
392 | ||
393 | __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x)); | |
1da177e4 LT |
394 | } |
395 | ||
396 | #define spin_lock_prefetch(x) prefetchw(x) | |
397 | ||
9f04b9e3 PM |
398 | #ifdef CONFIG_PPC64 |
399 | #define HAVE_ARCH_PICK_MMAP_LAYOUT | |
400 | #endif | |
1da177e4 | 401 | |
efbda860 JB |
402 | #ifdef CONFIG_PPC64 |
403 | static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32) | |
404 | { | |
405 | unsigned long sp; | |
406 | ||
407 | if (is_32) | |
408 | sp = regs->gpr[1] & 0x0ffffffffUL; | |
409 | else | |
410 | sp = regs->gpr[1]; | |
411 | ||
412 | return sp; | |
413 | } | |
414 | #else | |
415 | static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32) | |
416 | { | |
417 | return regs->gpr[1]; | |
418 | } | |
419 | #endif | |
420 | ||
e8bb3e00 | 421 | extern unsigned long cpuidle_disable; |
771dae81 DD |
422 | enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF}; |
423 | ||
ae3a197e | 424 | extern int powersave_nap; /* set if nap mode can be used in idle loop */ |
375f561a | 425 | extern void power7_nap(void); |
ae3a197e DH |
426 | |
427 | #ifdef CONFIG_PSERIES_IDLE | |
8ea959a1 | 428 | extern void update_smt_snooze_delay(int cpu, int residency); |
ae3a197e | 429 | #else |
8ea959a1 | 430 | static inline void update_smt_snooze_delay(int cpu, int residency) {} |
ae3a197e DH |
431 | #endif |
432 | ||
433 | extern void flush_instruction_cache(void); | |
434 | extern void hard_reset_now(void); | |
435 | extern void poweroff_now(void); | |
436 | extern int fix_alignment(struct pt_regs *); | |
437 | extern void cvt_fd(float *from, double *to); | |
438 | extern void cvt_df(double *from, float *to); | |
439 | extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val); | |
440 | ||
441 | #ifdef CONFIG_PPC64 | |
442 | /* | |
443 | * We handle most unaligned accesses in hardware. On the other hand | |
444 | * unaligned DMA can be very expensive on some ppc64 IO chips (it does | |
445 | * powers of 2 writes until it reaches sufficient alignment). | |
446 | * | |
447 | * Based on this we disable the IP header alignment in network drivers. | |
448 | */ | |
449 | #define NET_IP_ALIGN 0 | |
450 | #endif | |
451 | ||
1da177e4 | 452 | #endif /* __KERNEL__ */ |
9f04b9e3 PM |
453 | #endif /* __ASSEMBLY__ */ |
454 | #endif /* _ASM_POWERPC_PROCESSOR_H */ |