1 #ifndef _ASM_POWERPC_PROCESSOR_H
2 #define _ASM_POWERPC_PROCESSOR_H
5 * Copyright (C) 2001 PPC 64 Team, IBM Corp
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.
19 #define TS_FPROFFSET 0
20 #define TS_VSRLOWOFFSET 1
22 #define TS_FPROFFSET 1
23 #define TS_VSRLOWOFFSET 0
28 #define TS_FPROFFSET 0
32 /* Default SMT priority is set to 3. Use 11- 13bits to save priority. */
33 #define PPR_PRIORITY 3
35 #define INIT_PPR (PPR_PRIORITY << 50)
37 #define INIT_PPR ((u64)PPR_PRIORITY << 50)
38 #endif /* __ASSEMBLY__ */
39 #endif /* CONFIG_PPC64 */
42 #include <linux/compiler.h>
43 #include <linux/cache.h>
44 #include <asm/ptrace.h>
45 #include <asm/types.h>
46 #include <asm/hw_breakpoint.h>
48 /* We do _not_ want to define new machine types at all, those must die
49 * in favor of using the device-tree
53 /* PREP sub-platform types. Unused */
54 #define _PREP_Motorola 0x01 /* motorola prep */
55 #define _PREP_Firm 0x02 /* firmworks prep */
56 #define _PREP_IBM 0x00 /* ibm prep */
57 #define _PREP_Bull 0x03 /* bull prep */
59 /* CHRP sub-platform types. These are arbitrary */
60 #define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */
61 #define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */
62 #define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */
63 #define _CHRP_briq 0x07 /* TotalImpact's briQ */
65 #if defined(__KERNEL__) && defined(CONFIG_PPC32)
67 extern int _chrp_type;
69 #endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */
72 * Default implementation of macro that returns current
73 * instruction pointer ("program counter").
75 #define current_text_addr() ({ __label__ _l; _l: &&_l;})
77 /* Macros for adjusting thread priority (hardware multi-threading) */
78 #define HMT_very_low() asm volatile("or 31,31,31 # very low priority")
79 #define HMT_low() asm volatile("or 1,1,1 # low priority")
80 #define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority")
81 #define HMT_medium() asm volatile("or 2,2,2 # medium priority")
82 #define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority")
83 #define HMT_high() asm volatile("or 3,3,3 # high priority")
88 void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
89 void release_thread(struct task_struct *);
93 #if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
94 #error User TASK_SIZE overlaps with KERNEL_START address
96 #define TASK_SIZE (CONFIG_TASK_SIZE)
98 /* This decides where the kernel will search for a free chunk of vm
99 * space during mmap's.
101 #define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
106 * 64-bit user address space can have multiple limits
107 * For now supported values are:
109 #define TASK_SIZE_64TB (0x0000400000000000UL)
110 #define TASK_SIZE_128TB (0x0000800000000000UL)
111 #define TASK_SIZE_512TB (0x0002000000000000UL)
114 * For now 512TB is only supported with book3s and 64K linux page size.
116 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_64K_PAGES)
118 * Max value currently used:
120 #define TASK_SIZE_USER64 TASK_SIZE_512TB
121 #define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_128TB
122 #define TASK_CONTEXT_SIZE TASK_SIZE_512TB
124 #define TASK_SIZE_USER64 TASK_SIZE_64TB
125 #define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_64TB
127 * We don't need to allocate extended context ids for 4K page size, because
128 * we limit the max effective address on this config to 64TB.
130 #define TASK_CONTEXT_SIZE TASK_SIZE_64TB
134 * 32-bit user address space is 4GB - 1 page
135 * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
137 #define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE))
139 #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \
140 TASK_SIZE_USER32 : TASK_SIZE_USER64)
141 #define TASK_SIZE TASK_SIZE_OF(current)
142 /* This decides where the kernel will search for a free chunk of vm
143 * space during mmap's.
145 #define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
146 #define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(DEFAULT_MAP_WINDOW_USER64 / 4))
148 #define TASK_UNMAPPED_BASE ((is_32bit_task()) ? \
149 TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )
153 * Initial task size value for user applications. For book3s 64 we start
154 * with 128TB and conditionally enable upto 512TB
156 #ifdef CONFIG_PPC_BOOK3S_64
157 #define DEFAULT_MAP_WINDOW ((is_32bit_task()) ? \
158 TASK_SIZE_USER32 : DEFAULT_MAP_WINDOW_USER64)
160 #define DEFAULT_MAP_WINDOW TASK_SIZE
165 #define STACK_TOP_USER64 DEFAULT_MAP_WINDOW_USER64
166 #define STACK_TOP_USER32 TASK_SIZE_USER32
168 #define STACK_TOP (is_32bit_task() ? \
169 STACK_TOP_USER32 : STACK_TOP_USER64)
171 #define STACK_TOP_MAX TASK_SIZE_USER64
173 #else /* __powerpc64__ */
175 #define STACK_TOP TASK_SIZE
176 #define STACK_TOP_MAX STACK_TOP
178 #endif /* __powerpc64__ */
184 #define TS_FPR(i) fp_state.fpr[i][TS_FPROFFSET]
185 #define TS_CKFPR(i) ckfp_state.fpr[i][TS_FPROFFSET]
187 /* FP and VSX 0-31 register set */
188 struct thread_fp_state {
189 u64 fpr[32][TS_FPRWIDTH] __attribute__((aligned(16)));
190 u64 fpscr; /* Floating point status */
193 /* Complete AltiVec register set including VSCR */
194 struct thread_vr_state {
195 vector128 vr[32] __attribute__((aligned(16)));
196 vector128 vscr __attribute__((aligned(16)));
200 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
202 * The following help to manage the use of Debug Control Registers
203 * om the BookE platforms.
211 * The stored value of the DBSR register will be the value at the
212 * last debug interrupt. This register can only be read from the
213 * user (will never be written to) and has value while helping to
214 * describe the reason for the last debug trap. Torez
218 * The following will contain addresses used by debug applications
219 * to help trace and trap on particular address locations.
220 * The bits in the Debug Control Registers above help define which
221 * of the following registers will contain valid data and/or addresses.
225 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
231 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
238 struct thread_struct {
239 unsigned long ksp; /* Kernel stack pointer */
242 unsigned long ksp_vsid;
244 struct pt_regs *regs; /* Pointer to saved register state */
245 mm_segment_t fs; /* for get_fs() validation */
247 /* BookE base exception scratch space; align on cacheline */
248 unsigned long normsave[8] ____cacheline_aligned;
251 void *pgdir; /* root of page-table tree */
252 unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */
254 /* Debug Registers */
255 struct debug_reg debug;
256 struct thread_fp_state fp_state;
257 struct thread_fp_state *fp_save_area;
258 int fpexc_mode; /* floating-point exception mode */
259 unsigned int align_ctl; /* alignment handling control */
261 unsigned long start_tb; /* Start purr when proc switched in */
262 unsigned long accum_tb; /* Total accumulated purr for process */
264 #ifdef CONFIG_HAVE_HW_BREAKPOINT
265 struct perf_event *ptrace_bps[HBP_NUM];
267 * Helps identify source of single-step exception and subsequent
268 * hw-breakpoint enablement
270 struct perf_event *last_hit_ubp;
271 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
272 struct arch_hw_breakpoint hw_brk; /* info on the hardware breakpoint */
273 unsigned long trap_nr; /* last trap # on this thread */
275 #ifdef CONFIG_ALTIVEC
277 struct thread_vr_state vr_state;
278 struct thread_vr_state *vr_save_area;
279 unsigned long vrsave;
280 int used_vr; /* set if process has used altivec */
281 #endif /* CONFIG_ALTIVEC */
284 int used_vsr; /* set if process has used VSX */
285 #endif /* CONFIG_VSX */
287 unsigned long evr[32]; /* upper 32-bits of SPE regs */
288 u64 acc; /* Accumulator */
289 unsigned long spefscr; /* SPE & eFP status */
290 unsigned long spefscr_last; /* SPEFSCR value on last prctl
291 call or trap return */
292 int used_spe; /* set if process has used spe */
293 #endif /* CONFIG_SPE */
294 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
296 u64 tm_tfhar; /* Transaction fail handler addr */
297 u64 tm_texasr; /* Transaction exception & summary */
298 u64 tm_tfiar; /* Transaction fail instr address reg */
299 struct pt_regs ckpt_regs; /* Checkpointed registers */
301 unsigned long tm_tar;
302 unsigned long tm_ppr;
303 unsigned long tm_dscr;
306 * Checkpointed FP and VSX 0-31 register set.
308 * When a transaction is active/signalled/scheduled etc., *regs is the
309 * most recent set of/speculated GPRs with ckpt_regs being the older
310 * checkpointed regs to which we roll back if transaction aborts.
312 * These are analogous to how ckpt_regs and pt_regs work
314 struct thread_fp_state ckfp_state; /* Checkpointed FP state */
315 struct thread_vr_state ckvr_state; /* Checkpointed VR state */
316 unsigned long ckvrsave; /* Checkpointed VRSAVE */
317 #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
318 #ifdef CONFIG_PPC_MEM_KEYS
323 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
324 void* kvm_shadow_vcpu; /* KVM internal data */
325 #endif /* CONFIG_KVM_BOOK3S_32_HANDLER */
326 #if defined(CONFIG_KVM) && defined(CONFIG_BOOKE)
327 struct kvm_vcpu *kvm_vcpu;
333 * This member element dscr_inherit indicates that the process
334 * has explicitly attempted and changed the DSCR register value
335 * for itself. Hence kernel wont use the default CPU DSCR value
336 * contained in the PACA structure anymore during process context
337 * switch. Once this variable is set, this behaviour will also be
338 * inherited to all the children of this process from that point
342 unsigned long ppr; /* used to save/restore SMT priority */
345 #ifdef CONFIG_PPC_BOOK3S_64
357 unsigned int used_vas;
361 #define ARCH_MIN_TASKALIGN 16
363 #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
364 #define INIT_SP_LIMIT \
365 (_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack)
368 #define SPEFSCR_INIT \
369 .spefscr = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE, \
370 .spefscr_last = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE,
376 #define INIT_THREAD { \
378 .ksp_limit = INIT_SP_LIMIT, \
380 .pgdir = swapper_pg_dir, \
381 .fpexc_mode = MSR_FE0 | MSR_FE1, \
385 #define INIT_THREAD { \
387 .regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \
391 .fscr = FSCR_TAR | FSCR_EBB \
395 #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.regs)
397 unsigned long get_wchan(struct task_struct *p);
399 #define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
400 #define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)
402 /* Get/set floating-point exception mode */
403 #define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))
404 #define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val))
406 extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);
407 extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val);
409 #define GET_ENDIAN(tsk, adr) get_endian((tsk), (adr))
410 #define SET_ENDIAN(tsk, val) set_endian((tsk), (val))
412 extern int get_endian(struct task_struct *tsk, unsigned long adr);
413 extern int set_endian(struct task_struct *tsk, unsigned int val);
415 #define GET_UNALIGN_CTL(tsk, adr) get_unalign_ctl((tsk), (adr))
416 #define SET_UNALIGN_CTL(tsk, val) set_unalign_ctl((tsk), (val))
418 extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr);
419 extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val);
421 extern void load_fp_state(struct thread_fp_state *fp);
422 extern void store_fp_state(struct thread_fp_state *fp);
423 extern void load_vr_state(struct thread_vr_state *vr);
424 extern void store_vr_state(struct thread_vr_state *vr);
426 static inline unsigned int __unpack_fe01(unsigned long msr_bits)
428 return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);
431 static inline unsigned long __pack_fe01(unsigned int fpmode)
433 return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);
437 #define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0)
439 #define spin_begin() HMT_low()
441 #define spin_cpu_relax() barrier()
443 #define spin_cpu_yield() spin_cpu_relax()
445 #define spin_end() HMT_medium()
447 #define spin_until_cond(cond) \
449 if (unlikely(!(cond))) { \
459 #define cpu_relax() barrier()
462 /* Check that a certain kernel stack pointer is valid in task_struct p */
463 int validate_sp(unsigned long sp, struct task_struct *p,
464 unsigned long nbytes);
469 #define ARCH_HAS_PREFETCH
470 #define ARCH_HAS_PREFETCHW
471 #define ARCH_HAS_SPINLOCK_PREFETCH
473 static inline void prefetch(const void *x)
478 __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
481 static inline void prefetchw(const void *x)
486 __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
489 #define spin_lock_prefetch(x) prefetchw(x)
491 #define HAVE_ARCH_PICK_MMAP_LAYOUT
494 static inline unsigned long get_clean_sp(unsigned long sp, int is_32)
497 return sp & 0x0ffffffffUL;
501 static inline unsigned long get_clean_sp(unsigned long sp, int is_32)
507 extern unsigned long cpuidle_disable;
508 enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF};
510 extern int powersave_nap; /* set if nap mode can be used in idle loop */
511 extern unsigned long power7_idle_insn(unsigned long type); /* PNV_THREAD_NAP/etc*/
512 extern void power7_idle_type(unsigned long type);
513 extern unsigned long power9_idle_stop(unsigned long psscr_val);
514 extern void power9_idle_type(unsigned long stop_psscr_val,
515 unsigned long stop_psscr_mask);
517 extern void flush_instruction_cache(void);
518 extern void hard_reset_now(void);
519 extern void poweroff_now(void);
520 extern int fix_alignment(struct pt_regs *);
521 extern void cvt_fd(float *from, double *to);
522 extern void cvt_df(double *from, float *to);
523 extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
527 * We handle most unaligned accesses in hardware. On the other hand
528 * unaligned DMA can be very expensive on some ppc64 IO chips (it does
529 * powers of 2 writes until it reaches sufficient alignment).
531 * Based on this we disable the IP header alignment in network drivers.
533 #define NET_IP_ALIGN 0
536 #endif /* __KERNEL__ */
537 #endif /* __ASSEMBLY__ */
538 #endif /* _ASM_POWERPC_PROCESSOR_H */