| #ifndef _ASM_POWERPC_PROCESSOR_H |
| #define _ASM_POWERPC_PROCESSOR_H |
| |
| /* |
| * Copyright (C) 2001 PPC 64 Team, IBM Corp |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #include <asm/reg.h> |
| |
| #ifdef CONFIG_VSX |
| #define TS_FPRWIDTH 2 |
| #else |
| #define TS_FPRWIDTH 1 |
| #endif |
| |
| #ifdef CONFIG_PPC64 |
| /* Default SMT priority is set to 3. Use 11- 13bits to save priority. */ |
| #define PPR_PRIORITY 3 |
| #ifdef __ASSEMBLY__ |
| #define INIT_PPR (PPR_PRIORITY << 50) |
| #else |
| #define INIT_PPR ((u64)PPR_PRIORITY << 50) |
| #endif /* __ASSEMBLY__ */ |
| #endif /* CONFIG_PPC64 */ |
| |
| #ifndef __ASSEMBLY__ |
| #include <linux/compiler.h> |
| #include <linux/cache.h> |
| #include <asm/ptrace.h> |
| #include <asm/types.h> |
| #include <asm/hw_breakpoint.h> |
| |
| /* We do _not_ want to define new machine types at all, those must die |
| * in favor of using the device-tree |
| * -- BenH. |
| */ |
| |
| /* PREP sub-platform types. Unused */ |
| #define _PREP_Motorola 0x01 /* motorola prep */ |
| #define _PREP_Firm 0x02 /* firmworks prep */ |
| #define _PREP_IBM 0x00 /* ibm prep */ |
| #define _PREP_Bull 0x03 /* bull prep */ |
| |
| /* CHRP sub-platform types. These are arbitrary */ |
| #define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */ |
| #define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */ |
| #define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */ |
| #define _CHRP_briq 0x07 /* TotalImpact's briQ */ |
| |
| #if defined(__KERNEL__) && defined(CONFIG_PPC32) |
| |
| extern int _chrp_type; |
| |
| #endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */ |
| |
| /* |
| * Default implementation of macro that returns current |
| * instruction pointer ("program counter"). |
| */ |
| #define current_text_addr() ({ __label__ _l; _l: &&_l;}) |
| |
| /* Macros for adjusting thread priority (hardware multi-threading) */ |
| #define HMT_very_low() asm volatile("or 31,31,31 # very low priority") |
| #define HMT_low() asm volatile("or 1,1,1 # low priority") |
| #define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority") |
| #define HMT_medium() asm volatile("or 2,2,2 # medium priority") |
| #define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority") |
| #define HMT_high() asm volatile("or 3,3,3 # high priority") |
| |
| #ifdef __KERNEL__ |
| |
| struct task_struct; |
| void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp); |
| void release_thread(struct task_struct *); |
| |
| /* Lazy FPU handling on uni-processor */ |
| extern struct task_struct *last_task_used_math; |
| extern struct task_struct *last_task_used_altivec; |
| extern struct task_struct *last_task_used_vsx; |
| extern struct task_struct *last_task_used_spe; |
| |
| #ifdef CONFIG_PPC32 |
| |
| #if CONFIG_TASK_SIZE > CONFIG_KERNEL_START |
| #error User TASK_SIZE overlaps with KERNEL_START address |
| #endif |
| #define TASK_SIZE (CONFIG_TASK_SIZE) |
| |
| /* This decides where the kernel will search for a free chunk of vm |
| * space during mmap's. |
| */ |
| #define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3) |
| #endif |
| |
| #ifdef CONFIG_PPC64 |
| /* 64-bit user address space is 46-bits (64TB user VM) */ |
| #define TASK_SIZE_USER64 (0x0000400000000000UL) |
| |
| /* |
| * 32-bit user address space is 4GB - 1 page |
| * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT |
| */ |
| #define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE)) |
| |
| #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \ |
| TASK_SIZE_USER32 : TASK_SIZE_USER64) |
| #define TASK_SIZE TASK_SIZE_OF(current) |
| |
| /* This decides where the kernel will search for a free chunk of vm |
| * space during mmap's. |
| */ |
| #define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4)) |
| #define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(TASK_SIZE_USER64 / 4)) |
| |
| #define TASK_UNMAPPED_BASE ((is_32bit_task()) ? \ |
| TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 ) |
| #endif |
| |
| #ifdef __powerpc64__ |
| |
| #define STACK_TOP_USER64 TASK_SIZE_USER64 |
| #define STACK_TOP_USER32 TASK_SIZE_USER32 |
| |
| #define STACK_TOP (is_32bit_task() ? \ |
| STACK_TOP_USER32 : STACK_TOP_USER64) |
| |
| #define STACK_TOP_MAX STACK_TOP_USER64 |
| |
| #else /* __powerpc64__ */ |
| |
| #define STACK_TOP TASK_SIZE |
| #define STACK_TOP_MAX STACK_TOP |
| |
| #endif /* __powerpc64__ */ |
| |
| typedef struct { |
| unsigned long seg; |
| } mm_segment_t; |
| |
| #define TS_FPROFFSET 0 |
| #define TS_VSRLOWOFFSET 1 |
| #define TS_FPR(i) fpr[i][TS_FPROFFSET] |
| #define TS_TRANS_FPR(i) transact_fpr[i][TS_FPROFFSET] |
| |
| struct thread_struct { |
| unsigned long ksp; /* Kernel stack pointer */ |
| unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */ |
| |
| #ifdef CONFIG_PPC64 |
| unsigned long ksp_vsid; |
| #endif |
| struct pt_regs *regs; /* Pointer to saved register state */ |
| mm_segment_t fs; /* for get_fs() validation */ |
| #ifdef CONFIG_BOOKE |
| /* BookE base exception scratch space; align on cacheline */ |
| unsigned long normsave[8] ____cacheline_aligned; |
| #endif |
| #ifdef CONFIG_PPC32 |
| void *pgdir; /* root of page-table tree */ |
| #endif |
| #ifdef CONFIG_PPC_ADV_DEBUG_REGS |
| /* |
| * The following help to manage the use of Debug Control Registers |
| * om the BookE platforms. |
| */ |
| unsigned long dbcr0; |
| unsigned long dbcr1; |
| #ifdef CONFIG_BOOKE |
| unsigned long dbcr2; |
| #endif |
| /* |
| * The stored value of the DBSR register will be the value at the |
| * last debug interrupt. This register can only be read from the |
| * user (will never be written to) and has value while helping to |
| * describe the reason for the last debug trap. Torez |
| */ |
| unsigned long dbsr; |
| /* |
| * The following will contain addresses used by debug applications |
| * to help trace and trap on particular address locations. |
| * The bits in the Debug Control Registers above help define which |
| * of the following registers will contain valid data and/or addresses. |
| */ |
| unsigned long iac1; |
| unsigned long iac2; |
| #if CONFIG_PPC_ADV_DEBUG_IACS > 2 |
| unsigned long iac3; |
| unsigned long iac4; |
| #endif |
| unsigned long dac1; |
| unsigned long dac2; |
| #if CONFIG_PPC_ADV_DEBUG_DVCS > 0 |
| unsigned long dvc1; |
| unsigned long dvc2; |
| #endif |
| #endif |
| /* FP and VSX 0-31 register set */ |
| double fpr[32][TS_FPRWIDTH]; |
| struct { |
| |
| unsigned int pad; |
| unsigned int val; /* Floating point status */ |
| } fpscr; |
| int fpexc_mode; /* floating-point exception mode */ |
| unsigned int align_ctl; /* alignment handling control */ |
| #ifdef CONFIG_PPC64 |
| unsigned long start_tb; /* Start purr when proc switched in */ |
| unsigned long accum_tb; /* Total accumilated purr for process */ |
| #ifdef CONFIG_HAVE_HW_BREAKPOINT |
| struct perf_event *ptrace_bps[HBP_NUM]; |
| /* |
| * Helps identify source of single-step exception and subsequent |
| * hw-breakpoint enablement |
| */ |
| struct perf_event *last_hit_ubp; |
| #endif /* CONFIG_HAVE_HW_BREAKPOINT */ |
| #endif |
| struct arch_hw_breakpoint hw_brk; /* info on the hardware breakpoint */ |
| unsigned long trap_nr; /* last trap # on this thread */ |
| #ifdef CONFIG_ALTIVEC |
| /* Complete AltiVec register set */ |
| vector128 vr[32] __attribute__((aligned(16))); |
| /* AltiVec status */ |
| vector128 vscr __attribute__((aligned(16))); |
| unsigned long vrsave; |
| int used_vr; /* set if process has used altivec */ |
| #endif /* CONFIG_ALTIVEC */ |
| #ifdef CONFIG_VSX |
| /* VSR status */ |
| int used_vsr; /* set if process has used altivec */ |
| #endif /* CONFIG_VSX */ |
| #ifdef CONFIG_SPE |
| unsigned long evr[32]; /* upper 32-bits of SPE regs */ |
| u64 acc; /* Accumulator */ |
| unsigned long spefscr; /* SPE & eFP status */ |
| int used_spe; /* set if process has used spe */ |
| #endif /* CONFIG_SPE */ |
| #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
| u64 tm_tfhar; /* Transaction fail handler addr */ |
| u64 tm_texasr; /* Transaction exception & summary */ |
| u64 tm_tfiar; /* Transaction fail instr address reg */ |
| unsigned long tm_orig_msr; /* Thread's MSR on ctx switch */ |
| struct pt_regs ckpt_regs; /* Checkpointed registers */ |
| |
| /* |
| * Transactional FP and VSX 0-31 register set. |
| * NOTE: the sense of these is the opposite of the integer ckpt_regs! |
| * |
| * When a transaction is active/signalled/scheduled etc., *regs is the |
| * most recent set of/speculated GPRs with ckpt_regs being the older |
| * checkpointed regs to which we roll back if transaction aborts. |
| * |
| * However, fpr[] is the checkpointed 'base state' of FP regs, and |
| * transact_fpr[] is the new set of transactional values. |
| * VRs work the same way. |
| */ |
| double transact_fpr[32][TS_FPRWIDTH]; |
| struct { |
| unsigned int pad; |
| unsigned int val; /* Floating point status */ |
| } transact_fpscr; |
| vector128 transact_vr[32] __attribute__((aligned(16))); |
| vector128 transact_vscr __attribute__((aligned(16))); |
| unsigned long transact_vrsave; |
| #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ |
| #ifdef CONFIG_KVM_BOOK3S_32_HANDLER |
| void* kvm_shadow_vcpu; /* KVM internal data */ |
| #endif /* CONFIG_KVM_BOOK3S_32_HANDLER */ |
| #if defined(CONFIG_KVM) && defined(CONFIG_BOOKE) |
| struct kvm_vcpu *kvm_vcpu; |
| #endif |
| #ifdef CONFIG_PPC64 |
| unsigned long dscr; |
| int dscr_inherit; |
| unsigned long ppr; /* used to save/restore SMT priority */ |
| #endif |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| unsigned long tar; |
| #endif |
| }; |
| |
| #define ARCH_MIN_TASKALIGN 16 |
| |
| #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack) |
| #define INIT_SP_LIMIT \ |
| (_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack) |
| |
| #ifdef CONFIG_SPE |
| #define SPEFSCR_INIT .spefscr = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE, |
| #else |
| #define SPEFSCR_INIT |
| #endif |
| |
| #ifdef CONFIG_PPC32 |
| #define INIT_THREAD { \ |
| .ksp = INIT_SP, \ |
| .ksp_limit = INIT_SP_LIMIT, \ |
| .fs = KERNEL_DS, \ |
| .pgdir = swapper_pg_dir, \ |
| .fpexc_mode = MSR_FE0 | MSR_FE1, \ |
| SPEFSCR_INIT \ |
| } |
| #else |
| #define INIT_THREAD { \ |
| .ksp = INIT_SP, \ |
| .ksp_limit = INIT_SP_LIMIT, \ |
| .regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \ |
| .fs = KERNEL_DS, \ |
| .fpr = {{0}}, \ |
| .fpscr = { .val = 0, }, \ |
| .fpexc_mode = 0, \ |
| .ppr = INIT_PPR, \ |
| } |
| #endif |
| |
| /* |
| * Return saved PC of a blocked thread. For now, this is the "user" PC |
| */ |
| #define thread_saved_pc(tsk) \ |
| ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0) |
| |
| #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.regs) |
| |
| unsigned long get_wchan(struct task_struct *p); |
| |
| #define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0) |
| #define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0) |
| |
| /* Get/set floating-point exception mode */ |
| #define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr)) |
| #define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val)) |
| |
| extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr); |
| extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val); |
| |
| #define GET_ENDIAN(tsk, adr) get_endian((tsk), (adr)) |
| #define SET_ENDIAN(tsk, val) set_endian((tsk), (val)) |
| |
| extern int get_endian(struct task_struct *tsk, unsigned long adr); |
| extern int set_endian(struct task_struct *tsk, unsigned int val); |
| |
| #define GET_UNALIGN_CTL(tsk, adr) get_unalign_ctl((tsk), (adr)) |
| #define SET_UNALIGN_CTL(tsk, val) set_unalign_ctl((tsk), (val)) |
| |
| extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr); |
| extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val); |
| |
| static inline unsigned int __unpack_fe01(unsigned long msr_bits) |
| { |
| return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8); |
| } |
| |
| static inline unsigned long __pack_fe01(unsigned int fpmode) |
| { |
| return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1); |
| } |
| |
| #ifdef CONFIG_PPC64 |
| #define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0) |
| #else |
| #define cpu_relax() barrier() |
| #endif |
| |
| /* Check that a certain kernel stack pointer is valid in task_struct p */ |
| int validate_sp(unsigned long sp, struct task_struct *p, |
| unsigned long nbytes); |
| |
| /* |
| * Prefetch macros. |
| */ |
| #define ARCH_HAS_PREFETCH |
| #define ARCH_HAS_PREFETCHW |
| #define ARCH_HAS_SPINLOCK_PREFETCH |
| |
| static inline void prefetch(const void *x) |
| { |
| if (unlikely(!x)) |
| return; |
| |
| __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x)); |
| } |
| |
| static inline void prefetchw(const void *x) |
| { |
| if (unlikely(!x)) |
| return; |
| |
| __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x)); |
| } |
| |
| #define spin_lock_prefetch(x) prefetchw(x) |
| |
| #ifdef CONFIG_PPC64 |
| #define HAVE_ARCH_PICK_MMAP_LAYOUT |
| #endif |
| |
| #ifdef CONFIG_PPC64 |
| static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32) |
| { |
| unsigned long sp; |
| |
| if (is_32) |
| sp = regs->gpr[1] & 0x0ffffffffUL; |
| else |
| sp = regs->gpr[1]; |
| |
| return sp; |
| } |
| #else |
| static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32) |
| { |
| return regs->gpr[1]; |
| } |
| #endif |
| |
| extern unsigned long cpuidle_disable; |
| enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF}; |
| |
| extern int powersave_nap; /* set if nap mode can be used in idle loop */ |
| extern void power7_nap(void); |
| |
| #ifdef CONFIG_PSERIES_IDLE |
| extern void update_smt_snooze_delay(int cpu, int residency); |
| #else |
| static inline void update_smt_snooze_delay(int cpu, int residency) {} |
| #endif |
| |
| extern void flush_instruction_cache(void); |
| extern void hard_reset_now(void); |
| extern void poweroff_now(void); |
| extern int fix_alignment(struct pt_regs *); |
| extern void cvt_fd(float *from, double *to); |
| extern void cvt_df(double *from, float *to); |
| extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val); |
| |
| #ifdef CONFIG_PPC64 |
| /* |
| * We handle most unaligned accesses in hardware. On the other hand |
| * unaligned DMA can be very expensive on some ppc64 IO chips (it does |
| * powers of 2 writes until it reaches sufficient alignment). |
| * |
| * Based on this we disable the IP header alignment in network drivers. |
| */ |
| #define NET_IP_ALIGN 0 |
| #endif |
| |
| #endif /* __KERNEL__ */ |
| #endif /* __ASSEMBLY__ */ |
| #endif /* _ASM_POWERPC_PROCESSOR_H */ |