1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_POWERPC_PROCESSOR_H
3 #define _ASM_POWERPC_PROCESSOR_H
6 * Copyright (C) 2001 PPC 64 Team, IBM Corp
9 #include <vdso/processor.h>
17 #define TS_FPROFFSET 0
18 #define TS_VSRLOWOFFSET 1
20 #define TS_FPROFFSET 1
21 #define TS_VSRLOWOFFSET 0
26 #define TS_FPROFFSET 0
30 /* Default SMT priority is set to 3. Use 11- 13bits to save priority. */
31 #define PPR_PRIORITY 3
33 #define DEFAULT_PPR (PPR_PRIORITY << 50)
35 #define DEFAULT_PPR ((u64)PPR_PRIORITY << 50)
36 #endif /* __ASSEMBLY__ */
37 #endif /* CONFIG_PPC64 */
40 #include <linux/types.h>
41 #include <linux/thread_info.h>
42 #include <asm/ptrace.h>
43 #include <asm/hw_breakpoint.h>
45 /* We do _not_ want to define new machine types at all, those must die
46 * in favor of using the device-tree
50 /* PREP sub-platform types. Unused */
51 #define _PREP_Motorola 0x01 /* motorola prep */
52 #define _PREP_Firm 0x02 /* firmworks prep */
53 #define _PREP_IBM 0x00 /* ibm prep */
54 #define _PREP_Bull 0x03 /* bull prep */
56 /* CHRP sub-platform types. These are arbitrary */
57 #define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */
58 #define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */
59 #define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */
60 #define _CHRP_briq 0x07 /* TotalImpact's briQ */
62 #if defined(__KERNEL__) && defined(CONFIG_PPC32)
64 extern int _chrp_type;
66 #endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */
71 #include <asm/task_size_64.h>
73 #include <asm/task_size_32.h>
77 void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
79 #define TS_FPR(i) fp_state.fpr[i][TS_FPROFFSET]
80 #define TS_CKFPR(i) ckfp_state.fpr[i][TS_FPROFFSET]
82 /* FP and VSX 0-31 register set */
83 struct thread_fp_state {
84 u64 fpr[32][TS_FPRWIDTH] __attribute__((aligned(16)));
85 u64 fpscr; /* Floating point status */
88 /* Complete AltiVec register set including VSCR */
89 struct thread_vr_state {
90 vector128 vr[32] __attribute__((aligned(16)));
91 vector128 vscr __attribute__((aligned(16)));
95 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
97 * The following help to manage the use of Debug Control Registers
98 * om the BookE platforms.
106 * The stored value of the DBSR register will be the value at the
107 * last debug interrupt. This register can only be read from the
108 * user (will never be written to) and has value while helping to
109 * describe the reason for the last debug trap. Torez
113 * The following will contain addresses used by debug applications
114 * to help trace and trap on particular address locations.
115 * The bits in the Debug Control Registers above help define which
116 * of the following registers will contain valid data and/or addresses.
120 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
126 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
133 struct thread_struct {
134 unsigned long ksp; /* Kernel stack pointer */
137 unsigned long ksp_vsid;
139 struct pt_regs *regs; /* Pointer to saved register state */
141 /* BookE base exception scratch space; align on cacheline */
142 unsigned long normsave[8] ____cacheline_aligned;
145 void *pgdir; /* root of page-table tree */
146 #ifdef CONFIG_PPC_RTAS
147 unsigned long rtas_sp; /* stack pointer for when in RTAS */
149 #if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_PPC_KUAP)
150 unsigned long kuap; /* opened segments for user access */
156 #ifdef CONFIG_PPC_BOOK3S_32
157 unsigned long r0, r3, r4, r5, r6, r8, r9, r11;
158 unsigned long lr, ctr;
161 #endif /* CONFIG_PPC32 */
162 #if defined(CONFIG_BOOKE_OR_40x) && defined(CONFIG_PPC_KUAP)
163 unsigned long pid; /* value written in PID reg. at interrupt exit */
165 /* Debug Registers */
166 struct debug_reg debug;
167 #ifdef CONFIG_PPC_FPU_REGS
168 struct thread_fp_state fp_state;
169 struct thread_fp_state *fp_save_area;
171 int fpexc_mode; /* floating-point exception mode */
172 unsigned int align_ctl; /* alignment handling control */
173 #ifdef CONFIG_HAVE_HW_BREAKPOINT
174 struct perf_event *ptrace_bps[HBP_NUM_MAX];
176 * Helps identify source of single-step exception and subsequent
177 * hw-breakpoint enablement
179 struct perf_event *last_hit_ubp[HBP_NUM_MAX];
180 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
181 struct arch_hw_breakpoint hw_brk[HBP_NUM_MAX]; /* hardware breakpoint info */
182 unsigned long trap_nr; /* last trap # on this thread */
183 u8 load_slb; /* Ages out SLB preload cache entries */
185 #ifdef CONFIG_ALTIVEC
187 struct thread_vr_state vr_state;
188 struct thread_vr_state *vr_save_area;
189 unsigned long vrsave;
190 int used_vr; /* set if process has used altivec */
191 #endif /* CONFIG_ALTIVEC */
194 int used_vsr; /* set if process has used VSX */
195 #endif /* CONFIG_VSX */
198 unsigned long evr[32]; /* upper 32-bits of SPE regs */
199 u64 acc; /* Accumulator */
201 unsigned long spefscr; /* SPE & eFP status */
202 unsigned long spefscr_last; /* SPEFSCR value on last prctl
203 call or trap return */
204 int used_spe; /* set if process has used spe */
205 #endif /* CONFIG_SPE */
206 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
208 u64 tm_tfhar; /* Transaction fail handler addr */
209 u64 tm_texasr; /* Transaction exception & summary */
210 u64 tm_tfiar; /* Transaction fail instr address reg */
211 struct pt_regs ckpt_regs; /* Checkpointed registers */
213 unsigned long tm_tar;
214 unsigned long tm_ppr;
215 unsigned long tm_dscr;
216 unsigned long tm_amr;
219 * Checkpointed FP and VSX 0-31 register set.
221 * When a transaction is active/signalled/scheduled etc., *regs is the
222 * most recent set of/speculated GPRs with ckpt_regs being the older
223 * checkpointed regs to which we roll back if transaction aborts.
225 * These are analogous to how ckpt_regs and pt_regs work
227 struct thread_fp_state ckfp_state; /* Checkpointed FP state */
228 struct thread_vr_state ckvr_state; /* Checkpointed VR state */
229 unsigned long ckvrsave; /* Checkpointed VRSAVE */
230 #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
231 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
232 void* kvm_shadow_vcpu; /* KVM internal data */
233 #endif /* CONFIG_KVM_BOOK3S_32_HANDLER */
234 #if defined(CONFIG_KVM) && defined(CONFIG_BOOKE)
235 struct kvm_vcpu *kvm_vcpu;
241 * This member element dscr_inherit indicates that the process
242 * has explicitly attempted and changed the DSCR register value
243 * for itself. Hence kernel wont use the default CPU DSCR value
244 * contained in the PACA structure anymore during process context
245 * switch. Once this variable is set, this behaviour will also be
246 * inherited to all the children of this process from that point
252 #ifdef CONFIG_PPC_BOOK3S_64
271 #define ARCH_MIN_TASKALIGN 16
273 #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
274 #define INIT_SP_LIMIT ((unsigned long)&init_stack)
277 #define SPEFSCR_INIT \
278 .spefscr = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE, \
279 .spefscr_last = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE,
284 #ifdef CONFIG_PPC_BOOK3S_32
285 #define SR0_INIT .sr0 = IS_ENABLED(CONFIG_PPC_KUEP) ? SR_NX : 0,
290 #if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_PPC_KUAP)
291 #define INIT_THREAD { \
293 .pgdir = swapper_pg_dir, \
294 .kuap = ~0UL, /* KUAP_NONE */ \
295 .fpexc_mode = MSR_FE0 | MSR_FE1, \
299 #elif defined(CONFIG_PPC32)
300 #define INIT_THREAD { \
302 .pgdir = swapper_pg_dir, \
303 .fpexc_mode = MSR_FE0 | MSR_FE1, \
308 #define INIT_THREAD { \
314 #define task_pt_regs(tsk) ((tsk)->thread.regs)
316 unsigned long __get_wchan(struct task_struct *p);
318 #define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
319 #define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)
321 /* Get/set floating-point exception mode */
322 #define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))
323 #define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val))
325 extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);
326 extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val);
328 #define GET_ENDIAN(tsk, adr) get_endian((tsk), (adr))
329 #define SET_ENDIAN(tsk, val) set_endian((tsk), (val))
331 extern int get_endian(struct task_struct *tsk, unsigned long adr);
332 extern int set_endian(struct task_struct *tsk, unsigned int val);
334 #define GET_UNALIGN_CTL(tsk, adr) get_unalign_ctl((tsk), (adr))
335 #define SET_UNALIGN_CTL(tsk, val) set_unalign_ctl((tsk), (val))
337 extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr);
338 extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val);
340 extern void load_fp_state(struct thread_fp_state *fp);
341 extern void store_fp_state(struct thread_fp_state *fp);
342 extern void load_vr_state(struct thread_vr_state *vr);
343 extern void store_vr_state(struct thread_vr_state *vr);
345 static inline unsigned int __unpack_fe01(unsigned long msr_bits)
347 return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);
350 static inline unsigned long __pack_fe01(unsigned int fpmode)
352 return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);
357 #define spin_begin() \
358 asm volatile(ASM_FTR_IFCLR( \
359 "or 1,1,1", /* HMT_LOW */ \
360 "nop", /* v3.1 uses pause_short in cpu_relax instead */ \
361 %0) :: "i" (CPU_FTR_ARCH_31) : "memory")
363 #define spin_cpu_relax() \
364 asm volatile(ASM_FTR_IFCLR( \
365 "nop", /* Before v3.1 use priority nops in spin_begin/end */ \
366 PPC_WAIT(2, 0), /* aka pause_short */ \
367 %0) :: "i" (CPU_FTR_ARCH_31) : "memory")
370 asm volatile(ASM_FTR_IFCLR( \
371 "or 2,2,2", /* HMT_MEDIUM */ \
373 %0) :: "i" (CPU_FTR_ARCH_31) : "memory")
377 /* Check that a certain kernel stack pointer is valid in task_struct p */
378 int validate_sp(unsigned long sp, struct task_struct *p,
379 unsigned long nbytes);
384 #define ARCH_HAS_PREFETCH
385 #define ARCH_HAS_PREFETCHW
386 #define ARCH_HAS_SPINLOCK_PREFETCH
388 static inline void prefetch(const void *x)
393 __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
396 static inline void prefetchw(const void *x)
401 __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
404 #define spin_lock_prefetch(x) prefetchw(x)
407 extern unsigned long isa300_idle_stop_noloss(unsigned long psscr_val);
408 extern unsigned long isa300_idle_stop_mayloss(unsigned long psscr_val);
409 extern unsigned long isa206_idle_insn_mayloss(unsigned long type);
410 #ifdef CONFIG_PPC_970_NAP
411 extern void power4_idle_nap(void);
412 void power4_idle_nap_return(void);
415 extern unsigned long cpuidle_disable;
416 enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF};
418 extern int powersave_nap; /* set if nap mode can be used in idle loop */
420 extern void power7_idle_type(unsigned long type);
421 extern void arch300_idle_type(unsigned long stop_psscr_val,
422 unsigned long stop_psscr_mask);
423 void pnv_power9_force_smt4_catch(void);
424 void pnv_power9_force_smt4_release(void);
426 extern int fix_alignment(struct pt_regs *);
430 * We handle most unaligned accesses in hardware. On the other hand
431 * unaligned DMA can be very expensive on some ppc64 IO chips (it does
432 * powers of 2 writes until it reaches sufficient alignment).
434 * Based on this we disable the IP header alignment in network drivers.
436 #define NET_IP_ALIGN 0
439 int do_mathemu(struct pt_regs *regs);
440 int do_spe_mathemu(struct pt_regs *regs);
441 int speround_handler(struct pt_regs *regs);
444 int enter_vmx_usercopy(void);
445 int exit_vmx_usercopy(void);
446 int enter_vmx_ops(void);
447 void *exit_vmx_ops(void *dest);
449 #endif /* __KERNEL__ */
450 #endif /* __ASSEMBLY__ */
451 #endif /* _ASM_POWERPC_PROCESSOR_H */